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19-1700; Rev 0; 4/00
L MANUA ION KIT ALUAT DATA SHEET EV WS FOLLO
Upstream CATV Amplifier
Features
o Ultra-Low Power-Up/Down Transients, 25mV (typ) at 66dBmV Output o Single-Supply Operation o Output Level Ranges from <12dBmV to 67dBmV (QPSK) o Gain Programmable in 1dB Steps o Low Transmit Output Noise Floor: -41dBmV (160kHz BW) o Low Transmit-Disable Output Noise: -70dBmV o Shutdown Mode
General Description
The MAX3509 is a programmable power amplifier for use in CATV upstream applications. The device outputs up to 66dBmV QPSK through a 1:1 transformer. It features variable gain controlled by a 3-wire digital serial bus. Gain control is available in 1dB steps. The device operates over a 5MHz to 65MHz frequency range. The MAX3509 offers a transmit-disable mode, which places the device in a high-isolation state for use between bursts in TDMA systems. In this mode, all analog functions are shut down, minimizing output noise and power consumption. When entering and leaving transmit-disable mode, transients are kept to 25mV nominal at full gain. In addition, supply current is reduced to 7.8mA. An additional power-down mode is available. Shutdown mode disables all circuitry and reduces current consumption to less than 1A. The MAX3509 is available in a 20-pin TSSOP-EP package for the extended-industrial temperature range (-40C to +85C).
MAX3509
Ordering Information
PART MAX3509EUP *Exposed paddle TEMP. RANGE -40C to +85C PIN-PACKAGE 20 TSSOP-EP*
Applications
Telephony over Cable OPENCATV Set-Top Box Cable Modems CATV Status Monitor CATV Infrastructure
Typical Operating Circuit
+9V 0.1F 3 4 VCC1 GND1 VCC2 17 +9V 0.1F
Pin Configuration
TOP VIEW
TXEN 1 SHDN 2 20 SCLK 19 SDA 18 CS 17 VCC2
ANTI-ALIAS FILTER
1000pF
5
MAX3509
IN+ OUT+
4700pF 16 4700pF 15 14 T1 1:1
OUT
VCC1 3 GND1 4 IN+ 5 IN- 6
IN
1000pF
6
MAX3509
16 OUT+ 15 OUT14 VCC2 13 GND 12 GND
IN-
OUTVCC2
+9V 0.1F
8 7 2 1 20 19 18
VCC1 GND1 SHDN TXEN SCLK SDA CS
+9V 0.1F
GND1 7 VCC1 8 GND 9 GND 10 EXPOSED PADDLE
LOGIC INPUTS
GND2 * 9 GND 10 GND 11 GND 12 GND 13 GND
11 GND
TSSOP-EP
*EXPOSED PADDLE
Covered
by U.S. Patent numbers 5,748,027 and 5,994,955. 1
________________________________________________________________ Maxim Integrated Products
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.
Upstream CATV Amplifier MAX3509
ABSOLUTE MAXIMUM RATINGS
VCC1, VCC2 to GND, GND1 .................................-0.3V to +10.0V SCLK, SDA, CS, TXEN, SHDN to GND and GND1 .........................................................-0.3V to +5.5V Continuous Input Voltage (IN+, IN-) ...................................2Vp-p Continuous Current (OUT+, OUT-) .....................................80mA Continuous Power Dissipation (TA = +70C) 20-Pin TSSOP-EP (derate at 27mW/C above +70C)........................................................................2200mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC1 = VCC2 = 8.5V to 9.5V, TXEN = SHDN = high, D7 = 1, TA = -40C to +85C, unless otherwise noted. No input signal applied. Typical parameters are at TA = +25C.) PARAMETER Supply Voltage Supply Current Transmit Mode Supply Current Transmit-Disable Mode Supply Current Shutdown Mode Input High Voltage Input Low Voltage Input High Current Input Low Current SYMBOL VCC ICC ICC ICC VINH VINL IBIASH IBIASL -100 TXEN = low or D7 = 0 SHDN = low, TXEN = low 2.0 0.8 100 CONDITIONS MIN 8.5 84 7.8 1 TYP MAX 9.5 115 10 10 UNITS V mA mA A V V A A
AC ELECTRICAL CHARACTERISTICS
(MAX3509 EV kit, VCC1 = VCC2 = 8.5V to 9.5V, TXEN = SHDN = high, D7 = 1, VINPUT = 34dBmV differential, output impedance = 75 through a 1:1 transformer, TA = -40C to +85C, unless otherwise noted. Typical parameters are at TA = +25C.) PARAMETER SYMBOL CONDITIONS TA = +25C, fINPUT = 42MHz, gain control word = 63 TA = +25C, fINPUT = 42MHz, gain control word = 0 Voltage Gain AV TA = +25C, fINPUT = 42MHz, gain control word = 50 fINPUT = 42MHz, gain control word = 63 fINPUT = 42MHz, gain control word = 0 fINPUT = 42MHz, gain control word = 50 VOUTPUT = 60dBmV, fINPUT = 5MHz to 42MHz (Note 1) VOUTPUT = 60dBmV, fINPUT = 5MHz to 65MHz (Note 1) fINPUT = 5MHz to 65MHz, AV = -20dB to +33dB 0.7 -21 20.2 24 0.1 0.3 1 25.9 0.4 dB 0.9 1.3 dB -22 22 24 25.9 31 dB MIN TYP MAX 33 UNITS
Gain Flatness
Gain Step Size
2
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Upstream CATV Amplifier
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3509 EV kit, VCC1 = VCC2 = 8.5V to 9.5V, TXEN = SHDN = high, D7 = 1, VINPUT = 34dBmV differential, output impedance = 75 through a 1:1 transformer, TA = -40C to +85C, unless otherwise noted. Typical parameters are at TA = +25C.) PARAMETER SYMBOL CONDITIONS BW = 160kHz, AV = 32dB (Note 1) Transmit Mode Noise BW = 160kHz, AV = -20dB, TA = +25C (Note 1) BW = 160kHz, AV = -20dB, TA = +85C (Note 1) Transmit-Disable Mode Noise Floor TXEN Enable Transient Duration TXEN Disable Transient Duration TXEN Transient Step Size Input Impedance Output Impedance in Transmit Mode Output Impedance in Transmit-Disable Mode Two-Tone Third-Order Distortion ZINPUT TXEN = low, BW = 160kHz, AV = +32dB, fINPUT = 5MHz to 65MHz (Note 1) TXEN rise time <0.1s, TA = +25C (Note 1) TXEN fall time <0.1s, TA = +25C (Note 1) AV = 32dB, TA = +25C (Note 1) AV = 2dB or lower, TA = +25C (Note 1) fINPUT = 5MHz to 65MHz, single ended, TA = +25C (Note 1) 1.4 1 25 1.5 1.2 1.2 170 -53 -56 -56 -56 -56 -53 -43 26 0.1 1.7 -53 -50 -50 -53 -48.5 -40 dBm dB degrees dBc dBc -41 MIN TYP MAX -85 -39.5 -38.5 -70 2 1.5 100 9 UNITS dBc dBmV dBmV s s mVp-p k dBc
MAX3509
ZOUTPUT fINPUT = 5MHz to 65MHz, TA = +25C (Note 1) TXEN = low, fINPUT = 5MHz to 65MHz, ZOUTPUT T = +25C (Note 1) A IM3 Input tones at 65MHz and 65.2MHz, VINPUT = 31dBmV/tone, AV = 32dB (Note 1) fINPUT = 33MHz VOUTPUT = +60dBmV VOUTPUT = +66dBmV VOUTPUT = 66dBmV VOUTPUT = +60dBmV VOUTPUT = +66dBmV VOUTPUT = 66dBmV
2nd Harmonic Distortion
HD2 fINPUT = 65MHz (Note 1) fINPUT = 22MHz
3rd Harmonic Distortion
HD3 fINPUT = 65MHz (Note 1)
Output 1dB Compression Point AM to AM AM to PM
P1dB AM/AM AM/PM
AV = 32dB, 65MHz (Note 1) AV = 32dB, VINPUT swept from 34dBmV to 38dBmV (Note 1) AV = 32dB, VINPUT swept from 34dBmV to 38dBmV (Note 1)
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Upstream CATV Amplifier MAX3509
TIMING CHARACTERISTICS
(VCC1 = VCC2 = 8.5V to 9.5V, TXEN = SHDN = high, D7 = 1, TA = +25C, unless otherwise noted.) (Note 1) PARAMETER CS to SCK Rise Setup Time CS to SCK Rise Hold Time SDA to SCK Setup Time SDA to SCK Hold Time SDA Pulse Width High SDA Pulse Width Low SCK Pulse Width High SCK Pulse Width Low SYMBOL tSENS tSENH tSDAS tSDAH tDATAH tDATAL tSCKH tSCKL COMMENT MIN 10 20 10 20 50 50 50 50 TYP MAX UNITS ns ns ns ns ns ns ns ns
Note 1: Guaranteed by design and characterization.
Typical Operating Characteristics
(MAX3509 EV kit, VCC1 = VCC2 = +9V, VIN = +34dBmV, TXEN = SHDN = high, D7 = 1, fINPUT = 10MHz, ZLOAD = 75 through a 1:1 transformer, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE TRANSMIT ENABLE
MAX3509-01
SUPPLY CURRENT vs. TEMPERATURE TRANSMIT DISABLE
MAX3509-02
SUPPLY CURRENT vs. OUTPUT POWER
MAX3509-03
100 95 SUPPLY CURRENT (mA) 90 85 80 75 70 65 60 -40 -15 10 35 60
9.0 8.5 SUPPLY CURRENT (mA) 8.0 7.5 7.0 6.5 6.0
140 130 SUPPLY CURRENT (mA) 120 110 TA = +25C 100 90 80 70 TA = -40C TA = +85C
85
-40
-15
10
35
60
85
30
36
42
48
54
60
66
72
TEMPERATURE (C)
TEMPERATURE (C)
OUTPUT POWER (dBmV)
VOLTAGE GAIN vs. SUPPLY VOLTAGE (CONTROL WORD = 25)
MAX3509-04
VOLTAGE GAIN vs. SUPPLY VOLTAGE (CONTROL WORD = 50)
MAX3509-05
VOLTAGE GAIN vs. TEMPERATURE (CONTROL WORD = 25)
0.4 0.3 VOLTAGE GAIN (dB) 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 9.5V 9.0V 8.5V
MAX3509-06
0.32 0.30 VOLTAGE GAIN (dB) 0.28 0.26 TA = -40C 0.24 TA = +25C 0.22 0.20 TA = +85C
25.2 25.0 VOLTAGE GAIN (dB) 24.8 24.6 24.4 24.2 24.0 TA = +25C TA = +85C
0.5
TA = -40C
-0.5 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 SUPPLY VOLTAGE (V) -40 -15 10 35 60 85 TEMPERATURE (C)
8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 SUPPLY VOLTAGE (V)
4
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Upstream CATV Amplifier MAX3509
Typical Operating Characteristics (continued)
(MAX3509 EV kit, VCC1 = VCC2 = +9V, VIN = +34dBmV, TXEN = SHDN = high, D7 = 1, fINPUT = 10MHz, ZLOAD = 75 through a 1:1 transformer, TA = +25C, unless otherwise noted.)
VOLTAGE GAIN vs. FREQUENCY
MAX3509-07
VOLTAGE GAIN vs. CONTROL WORD
MAX3509-08
GAIN STEP vs. CONTROL WORD
MAX3509-09
50 40 30 VOLTAGE GAIN (dB) 20 10 0 -10 -20 -30 -40 -50 5
D E F G A B C
40 30 10MHz VOLTAGE GAIN (dB) 20 10 0 -10 -20 -30 60MHz
1.3 1.2 GAIN STEP (dB) 1.1 1.0 0.9 0.8 0.7
GAIN CONTROL WORD A = 63, B = 57, C = 48, D = 36, E = 24, F = 12, G=6 10 100 500
0
10
20
30
40
50
60
0
10
20
30
40
50
60
FREQUENCY (MHz)
CONTROL WORD (DECIMAL)
CONTROL WORD (DECIMAL)
TRANSMIT OUTPUT NOISE vs. GAIN
MAX3509-10
POWER-UP/DOWN TRANSIENTS vs. CONTROL WORD
MAX3509-11
2ND HARMONIC DISTORTION vs. INPUT FREQUENCY
66dBmV -62 60dBmV
MAX3509-12
-20 -22 OUTPUT NOISE (dBmV IN 160kHz) -24 -26 -28 -30 -32 -34 -36 -38 -40 -42 -24 -14 -4 6 GAIN (dB) 16 26
100
-58 2ND HARMONIC DISTORTION (dBc)
TRANSIENT LEVEL (mVp-p)
10
-66
-70
1 36 0 10 20 30 40 50 60 70 CONTROL WORD
-74 0 10 20 30 40 50 60 70 FREQUENCY (MHz)
2ND HARMONIC DISTORTION vs. INPUT FREQUENCY
MAX3509-13
3RD HARMONIC DISTORTION vs. INPUT FREQUENCY AND OUTPUT POWER
MAX3509-14
QPSK OUTPUT SPECTRUM
-20 -30 -40 VOUT = 66dBmV 1280 ks/s = 0.25
MAX3509-15
-50 2ND HARMONIC DISTORTION (dBc) -55 10dBmV -60 30dBmV -65 -70 -75 -80 0 10 20 30 40 50 60
-40 3RD HARMONIC DISTORTION (dBc) -45 -50 -55 -60 -65 -70 -75 -80 -85 -90 10dBmV 30dBmV 66dBmV 60dBmV
-10
-50 -60 -70 -80 -90 -100 -110 CENTER 22MHz 500kHz/div SPAN 5MHz
70
0
10
20
30
40
50
60
70
FREQUENCY (MHz)
FREQUENCY (MHz)
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Upstream CATV Amplifier MAX3509
Typical Operating Characteristics (continued)
(MAX3509 EV kit, VCC1 = VCC2 = +9V, VIN = +34dBmV, TXEN = SHDN = high, D7 = 1, fINPUT = 10MHz, ZLOAD = 75 through a 1:1 transformer, TA = +25C, unless otherwise noted.)
QPSK OUTPUT SPECTRUM
MAX3509-16
OUTPUT SPECTRUM
-40 -50 -60 -70 -80 -90 -100 -110 -120 VOUT = 66dBmV 1280 ks/s = 0.25
MAX3509-17
-20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 CENTER 22MHz 100kHz/div SPAN 1MHz VOUT = 66dBmV 160 ks/s = 0.25
-30
START 15MHz 5.5MHz/div
STOP 70MHz
-130
Pin Description
PIN 1 2 3, 8 4, 7 5 6 9-13 14,17 15 16 18 19 20 Exposed Paddle NAME TXEN SHDN VCC1 GND1 IN+ INGND VCC2 OUTOUT+ CS SDA SCLK GND2 FUNCTION Transmit Enable. To disable the MAX3509 and provide high input/output isolation, drive TXEN low. Drive TXEN high for normal operation. Shutdown. To enable low-power shutdown, drive SHDN low. Drive SHDN high for normal operation. Programmable-Gain Amplifier (PGA) +9V Supply. Bypass to GND1 with a 0.1F decoupling capacitor as close to the part as possible. PGA Ground. Connect to ground with a low inductance path. Noninverting PGA Input. Along with IN-, this port forms a high-impedance differential input to the PGA. Driving this port differentially increases the rejection of second-order distortion at low output levels. Inverted PGA Input. When not used, AC-coupled to ground. See IN+. Ground Power Amplifier Bias +9V Supply. Bypass to GND2 (exposed paddle) with a 0.1F decoupling capacitor as close to the part as possible. Inverted Output. AC-couple to output transformer. Used in conjunction with OUT+. Noninverted Output. See OUT-. Serial-Interface Enable. TTL-compatible input. See Serial Interface. Serial-Interface Data. TTL-compatible input. See Serial Interface. Serial-Interface Clock. TTL-compatible input. See Serial Interface. Power Amplifier Bias Ground. Connect to ground with a low inductance path. Ensure a low thermal resistive path to PC board. See Layout Issues.
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Upstream CATV Amplifier MAX3509
SHDN TXEN PA BIAS
VCC1
PGA BIAS
VCC2
IN+
OUT+
IN-
OUT-
D/A CONVERTER
MAX3509
SERIAL DATA INTERFACE CS SDA SCLK
Figure 1. MAX3509 Functional Diagram
Detailed Description
The following sections describe the blocks shown in the functional diagram (Figure 1).
convert to a single-ended output. In transmit-disable mode, bias to the power amplifier is reduced to a minimal level, which provides high input to output isolation and low output noise.
Programmable-Gain Amplifier
The PGA consists of the variable-gain amplifier (VGA) and the digital-to-analog converter (DAC), which provide better than 55dB of output level control in 1dB steps. The PGA is implemented as a programmable Gilbertcell attenuator. It uses a differential architecture to achieve maximum linearity. The gain of the PGA is determined by a 6-bit word (D5-D0) programmed through the serial data interface (Tables 1 and 2). Specified performance is achieved when the input is driven differentially. The device may be driven single ended; however, a slight increase in even-order distortion may result at low output levels. To drive the device in this manner, one of the input pins must be capacitively coupled to ground. Use a capacitor value large enough to allow for a low-impedance path to ground at the lowest frequency of operation.
Serial Interface
The serial interface has an active-low enable (CS) to bracket the data, with data clocked in MSB first on the rising edge of SCLK. Data is stored in the storage latch on the rising edge of CS. The serial interface controls the state of the PGA. Tables 1 and 2 show the register format. Serial-interface timing is shown in Figure 2.
PGA Bias Cell
The bias cell in the MAX3509 is controlled by the logic levels present at TXEN and SHDN, as well as the program state of D7, the MSB of the 8-bit program word. Transmit-disable mode is actuated when the TXEN pin is driven to a logic low or when D7 = 0. In this mode, current to the PGA and power amps is reduced significantly while maintaining normal current flow to the serial data interface and DAC. This preserves the program stored in the serial data interface. A logic low at the SHDN pin overrides the state of the TXEN pin or D7. In shutdown mode, the current to the PGA, power amp, serial data interface, and DAC is cut off, allowing only leakage currents to flow. The stored gain control program is lost in this mode.
Power Amplifier
The power amplifier has two current-feedback amplifiers in an instrumentation amplifier configuration. This architecture provides superior even-order distortion performance but requires an external transformer to
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Upstream CATV Amplifier MAX3509
Power Amp Bias Cell
The power amp bias cell is used to enable and disable bias to the output power amplifier. This is controlled by TXEN and SHDN.
A G B C D E F
Functional Modes
The MAX3509 has three functional modes controlled through the serial interface or external pins (Table 2): transmit mode, transmit-disable mode, and shutdown. Transmit Mode Transmit mode is the normal active mode of the MAX3509. Drive TXEN and SHDN high, and set D7 = 1 to activate transmit mode. Transmit-Disable Mode When in transmit-disable mode, all analog circuitry is shut down. This mode is activated by driving TXEN low or setting D7 = 1 while keeping SHDN high. This mode is typically used between bursts in TDMA systems. Transients are controlled by the transformer balance. Shutdown Mode In normal operation, the shutdown pin (SHDN) is held high. When SHDN is driven low, all circuits within the IC are disabled. Only leakage currents flow in this mode. Data stored within the serial-data interface latches will be lost upon entering this mode. Current draw is reduced to 1A (typ) in shutdown mode.
D7 D6 A. tSENS B. tSDAS C. tSDAH D. tSCKL D5 D4 D3 D2 D1 D0
E. tSCKH F. tSENH G. tDATAH/tDATAL
Figure 2. Serial-Interface Timing Diagram
Table 1. Serial-Interface Control Word
BIT MSB 7 6 5 4 3 2 1 LSB 0 MNEMONIC D7 D6 D5 D4 D3 D2 D1 D0 DESCRIPTION Transmit Disable Not used Gain Control, Bit 5 Gain Control, Bit 4 Gain Control, Bit 3 Gain Control, Bit 2 Gain Control, Bit 1 Gain Control, Bit 0
Table 2. Truth Table
SHDN 0 1 1 1 1 1 1 1 1 1 1 TXEN X 0 X 1 1 1 1 1 1 1 1 D7 X X 0 1 1 1 1 1 1 1 1 D6 X X X X X X X X X X X D5 X X X X 0 0 -- 0 -- 1 1 D4 X X X X 0 0 -- 1 -- 1 1 D3 X X X X 0 0 -- 1 -- 1 1 D2 X X X X 0 0 -- 0 -- 1 1 D1 X X X X 0 0 -- 0 -- 1 1 D0 X X X X 0 1 -- 1 -- 0 1 GAIN CONTROL WORD X X X X 0 1 -- 25 -- 62 63 STATE Shutdown Mode Transmit-Disable Mode Transmit-Disable Mode Transmit Mode Gain = -25dB* Gain = -24dB* -- Gain = 0dB* -- Gain = 35dB* Gain = 36dB*
*Typical gain at +25C and VCC = +9V. 8 _______________________________________________________________________________________
Upstream CATV Amplifier MAX3509
Applications Information
Transformer
To maintain rated performance into a 75 load, a 1:1 impedance ratio output transformer with adequate bandwidth is required. A step-up transformer with a 1:1.5 impedance ratio will increase gain and output voltage swing nominally by 1.7dB, but output noise performance will increase by the same amount. It is recommended that the EP be soldered to a ground plane on the PC board, either directly or through an array of plated via holes. Output Circuit Layout The differential implementation of the MAX3509's output has the benefit of reducing even-order distortion, the most significant of which is second-harmonic distortion. The degree of distortion cancellation depends on the amplitude and phase balance of the overall circuit. It is important that the traces that lead from the output pins be the same length. Power-Supply Layout To achieve minimal coupling between different sections of the IC, the ideal power-supply layout is a star configuration. This configuration has a large-value decoupling capacitor at the central power-supply node. The powersupply traces branch out from this node, each going to a separate power-supply node in the MAX3509 circuit. At the end of each of these traces is a decoupling capacitor that provides a very low impedance at the frequency of interest. This arrangement provides local power-supply decoupling at each power-supply pin. The power-supply traces must be made as thick as practical to keep resistance well below 1. Ground inductance degrades distortion performance. Therefore, ground plane connections to GND, GND1, and GND2 should be made with multiple vias if possible.
Input Circuit
To achieve rated performance, the input of the MAX3509 must be driven differentially with 34dBmV or lower input level. The MAX3509 can be driven from a single-ended source. A slight degradation in evenorder distortion at a 10W output level will result. The differential input impedance is approximately 1.2k. Most applications require a differential lowpass filter preceding the MAX3509. The filter design dictates a terminating resistance of a specified value. Place this resistance across the AC-coupled inputs (see Typical Operating Circuit). The MAX3509 has sufficient gain to produce an output level of 66dBmV when driven with a 34dBmV input signal. Rated performance is achieved with this input level. When a lower input level is present, the maximum output level will be reduced proportionally and output linearity will improve. If an input level greater than 34dBmV is used, distortion performance degrades. If a single-ended source drives the MAX3509, one of the input terminals must be capacitively coupled to ground (IN+ or IN-). The value of this capacitor must be large enough to look like a short circuit at the lowest frequency of interest. For operation at 5MHz with a 50 source impedance, a value of 0.1F will suffice. A typical model for the MAX3509 input impedance is shown in Figure 3.
IN+
2.5k
1.9pF
Layout Issues
A well-designed PC board is an essential part of an RF circuit. For best performance, pay attention to powersupply layout issues, as well as the output circuit layout.
IN-
Figure 3. Typical Equivalent Input Circuit
Exposed Paddle Thermal Considerations
The exposed paddle (EP) of the MAX3509's 20-pin TSSOP-EP package provides a low thermal resistance path to the die. It is important that the PC board on which the MAX3509 is mounted be designed to conduct heat from this contact. In addition, the EP should be provided with a low inductance path to electrical ground.
Chip Information
TRANSISTOR COUNT: 1085
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Upstream CATV Amplifier MAX3509
Package Information
TSSOP.EPS
10
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Upstream CATV Amplifier MAX3509
NOTES
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Upstream CATV Amplifier MAX3509
NOTES
12 _________________________________________________________________________________________________

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