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SA5217 Postamplifier with link status indicator
Product specification Replaces datasheet NE/SA5217 of 1995 Apr 26 IC19 Data Handbook 1998 Oct 07
Philips Semiconductors
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
DESCRIPTION
The SA5217 is a 75MHz postamplifier system designed to accept low level high-speed signals. These signals are converted into a TTL level at the output. The SA5217 can be DC coupled with the previous transimpedance stage using SA5210, SA5211 or SA5212A transimpedance amplifiers. The main difference between the SA5217 and the SA5214 is that the SA5217 does not make the output of A1 and input of A2 accessible; instead, it brings out the output of A2 and the input of A8 thus activating the on-chip Schmitt trigger function by connecting two external capacitors. The result is that a much longer string of 1s and 0s, in the bit stream, can be tolerated. This "system on a chip" features an auto-zeroed first stage with noise shaping, a symmetrical limiting second stage, and a matched rise/fall time TTL output buffer. The system is user-configurable to provide adjustable input threshold and hysteresis. The threshold capability allows the user to maximize signal-to-noise ratio, thereby insuring a low Bit Error Rate (BER). An auto-zero loop can be used to replace two input coupling capacitors with a single Auto Zero (AZ) capacitor. A signal absent flag indicates when signals are below threshold. The low signal condition forces the TTL output to the last logic state. User interaction with this "jamming" system is available. The SA5217 is packaged in a standard 20-pin surface-mount package and typically consumes 40mA from a standard 5V supply. The SA5217 is designed as a companion to the SA5211/5212A and SA5210 transimpedance amplifiers. These differential preamplifiers may be directly coupled to the postamplifier inputs. The SA5210/5217, SA5211/5217 or SA5212A/5217 combinations convert nanoamps of photodetector current into standard digital TTL levels.
PIN CONFIGURATION
D1 Package
LED CPKDET THRESH GNDA FLAG JAM VCCD VCCA GNDD VOUT 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 IN1B IN1A CAZP CAZN OUT2B IN8B OUT2A IN8A RHYST RPKDET
NOTE: 1. SOL - Released in large SO package only.
SD00354
Figure 1. Pin Configuration
FEATURES
APPLICATIONS
* Fiber optics * Communication links in Industrial and/or Telecom environment
with high EMI/RFI
* Local Area Networks (LAN) * Synchronous Optical Networks (SONET) STS-1 * RF limiter * Good for 223 -1 pseudo random bit stream
* Postamp for the SA5211/5212A. SA5210 preamplifier family * Wideband operation: typical 75MHz (150MBaud NRZ) * Interstage filtering/equalization possible * Single 5V supply * Low signal flag * Output disable * Link status threshold and hysteresis programmable * LED driver (normally ON with above threshold signal) * Fully differential for excellent PSRR * Auto-zero loop for DC offset cancellation * 2kV ElectroStatic Discharge (ESD) protection
TEMPERATURE RANGE -40 to +85C ORDER CODE SA5217D DWG # SOT163-1
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic Small Outline Large (SOL) Package
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCCA VCCD TA TJ TSTG PD VIJ Power supply Power supply Operating ambient temperature range Operating junction temperature range Storage temperature range Power dissipation Jam input voltage PARAMETER SA5214 +6 +6 -40 to +85 -55 to +150 -65 to +150 1.4 -0.5 to 5.5 UNIT V V C C C W V
1998 Oct 07
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853-1658 20141
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
PIN DESCRIPTIONS
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL LED CPKDET THRESH GNDA FLAG JAM VCCD VCCA GNDD VOUT RPKDET RHYST IN8A OUT2A IN8B OUT2B CAZN CAZP IN1A IN1B DESCRIPTION Output for the LED driver. Open collector output transistor with 125 series limiting resistor. An above threshold signal turns this transistor ON. Capacitor for the peak detector. The value of this capacitor determines the detector response time to the signal, supplementing the internal 10pF capacitor. Peak detector threshold resistor. The value of this resistor determines the threshold level of the peak detector. Device analog ground pin. Peak detector digital output. When this output is LOW, there is data present above the threshold. This pin is normally connected to the JAM pin and has a TTL fanout of two. Input to inhibit data flow. Sending the pin HIGH forces TTL DATA OUT ON, Pin 10, LOW. This pin is normally connected to the FLAG pin and is TTL-compatible. Power supply pin for the digital portion of the chip. Power supply pin for the analog portion of the chip. Device digital ground pin. TTL output pin with a fanout of five. Peak detector current resistor. The value of this resistor determines the amount of discharge current available to the peak detector capacitor, CPKDET. Peak detector hysteresis resistor. The value of this resistor determines the amount of hysteresis in the peak detector. Non-inverting input to amplifier A8. Non-inverting output of amplifier A2. Inverting input to amplifier A8. Inverting output of amplifier A2. Auto-Zero capacitor pin (Negative terminal). The value of this capacitor determines the low-end frequency response of the preamp A1. Auto-Zero capacitor pin (Positive terminal). The value of this capacitor determines the low-end frequency response of the preamp A1. Non-inverting input of the preamp A1. Inverting input of the preamp A1.
BLOCK DIAGRAM
VCCA 8 IN1B IN1A CAZP CAZN 20 19 18 17 A6 OUTPUT DISABLE 6 JAM A1 VCCD 7 GATED AMP A2 OUT2A OUT2B 14 16 IN8B 15 IN8A 13 SCHMITT TRIGGER A8 10 VOUT
PEAK DETECT RPKDET 11 A3 A4 5 FLAG
A5 A7 HYSTERESIS 4 GNDA 9 GNDD 3 THRESH 2 CPKDET 12 RHYST
1
LED
LED DRIVER
SD00355
Figure 2. Block Diagram
1998 Oct 07
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Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCCA VCCD TA TJ PD Power supply Power supply Ambient temperature range Operating junction temperature range Power dissipation PARAMETER RATING 4.5 to 5.5 4.5 to 5.5 -40 to +85 -40 to +110 300 UNIT V V C C mW
DC ELECTRICAL CHARACTERISTICS
Min and Max limits apply over the operating temperature range at VCCA = VCCD = +5.0V unless otherwise specified. Typical data applies at VCCA = VCCD = +5.0V and TA = 25C. SYMBOL ICCA ICCD VI1 VO2 VI8L VI8H VOH VOL IOH IOL IOS VTHRESH VRPKDET VRHYST VIHJ VILJ IIHJ IILJ VOHF VOLF IOHF IOLF ISCF ILEDH PARAMETER Analog supply current Digital supply current (TTL, Flag, LED) A1 input bias voltage (A,B inputs) A1 output bias voltage (A,B outputs) A8 input bias voltage Low (A,B inputs) A8 input bias voltage High (A,B inputs) High-level TTL output voltage Low-level TTL output voltage High-level TTL output current Low-level TTL output current Short-circuit TTL output current Threshold bias voltage RPKDET RHYST bias voltage High-level jam input voltage Low-level jam input voltage High-level jam input current Low-level jam input current High-level flag output voltage Low-level flag output voltage High-level flag output current Low-level flag output current Short-circuit flag output current LED ON maximum sink current VIJ=2.7V VIJ=0.4V IOH=-80A IOL=3.2mA VOUT=2.4V VOUT=0.4V VOUT=0.0V VLED=3.0V 3.25 -61 8 -485 2.4 -240 3.8 0.33 -18 10 -40 22 -26 80 0.4 -5 IOH=-200A IOL=8mA VOUT=2.4V VOUT=0.4V VOUT=0.0V Pin 3 Open Pin 11 Open Pin 12 Open 2.0 0.8 30 7.0 3.08 3.10 3.40 3.68 2.4 TEST CONDITIONS LIMITS Min Typ 30 10 3.4 3.8 3.55 3.91 3.4 0.3 -40 30 -95 0.75 0.72 0.72 0.4 -24.4 Max 41.2 13.5 3.70 4.50 3.68 4.12 UNIT mA mA V V V V V V mA mA mA V V V V V A A V V mA mA mA mA
1998 Oct 07
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Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
AC ELECTRICAL CHARACTERISTICS
Min and Max limits apply over the operating temperature range at VCCA = VCCD = +5.0V unless otherwise specified. Typical data applies at VCCA = VCCD = +5.0V and TA = 25C. SYMBOL fOP VINH PARAMETER Maximum operating frequency Maximum Functional A1 input signal (single ended) Minimum Functional A1 input signal (single-ended) Minimum Functional A1 input signal (differential) VINL Minimum input sensitivity for output BER 10-9 (single-ended) Minimum input sensitivity for output BER 10-9 (differential) RIN1 CIN1 RIN8 CIN2 ROUT2 COUT2 VHYS S Input resistance (differential at IN1) Input capacitance (differential at IN1) Input resistance (differential at IN2) Input capacitance (differential at IN2) Output resistance (differential at OUT2) Output capacitance (differential at OUT2) Hysteresis voltage range (single-ended) Hysteresis voltage range (differential) Threshold voltage (single-ended) Threshold voltage (differential) tTLH tTHL tRFD tPWD TTL Output Rise Time 20% to 80% TTL Output Fall Time 80% to 20% tTLH/tTHL mismatch Pulse width distortion of output 50mVP-P, 1010. . .input TH * TL 2 Distortion = 10 TH ) TL Test circuit, TA = 25C RRHYST=5k RTHRESH=33k (FLAG Low) Test circuit, @ 50MHz RRHYST=4k RTHRESH=33k Test Circuit Test Circuit TEST CONDITIONS Test circuit Test Circuit LIMITS Min 60 Typ 75 1.6 6 3 9 PRBS = 223-1 1 4.5 PRBS = 223-1 1200 2 2000 2 25 2 10 5 19 9.5 1.3 1.2 0.1 TBD ns ns ns % pF pF pF mVP-P mVP-P Max UNIT MHz VP-P
Test CIrcuit
mVP-P PP
VTHR
mVP-P PP
VCC +5V 125 33k 0.1F 1 2 3 4 5 6 7 8 9 10
NE5217 0.1F LED IN1B CPKDET IN1A THRESH CAZP GNDA CAZN FLAG OUT2B JAM IN8B VCCD VCCA GNDD 20 19 0.1F 0.1F 25 0.1F 0.1F 4k 50 VIN
100H 100H 0.1F
VOUT RPKDET
18 17 16 15 14 OUT2A 13 IN8A 12 RHYST 11
10k 10F
400
VOUT
15pF
SD00356
Figure 3. AC Test Circuit
1998 Oct 07
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Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
TYPICAL PERFORMANCE CHARACTERISTICS
Analog Supply Current vs Temperature
36 12.0 34 VCC = 5.25V 11.5 32 VCC = 5.00V 30 DIGITAL SUPPLY CURRENT (mA)
Digital Supply Current vs Temperature
ANALOG SUPPLY CURRENT (mA)
11.0 VCC = 5.25V 10.5
28
VCC = 4.75V
10.0
VCC = 5.00V
26
9.5 VCC = 4.75V
24 -60
-40
-20
0
20
40
60
80
100
120
9.0 -60
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (C)
TEMPERATURE (C)
SD00357
Figure 4. Typical Performance Characteristics
1998 Oct 07
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Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Threshold vs RTHRESH for Different Values of RHYST (Driven Single Ended)
45 VCC = 5V TA = 27C 2k THRESHOLD (mV P-P ) 35 3k 30 F = 60MHz V IN (mV P-P ) 30
ON
On/Off Voltage vs RTHRESH (Driven Single Ended)
50 VCC = 5V 40 TA = 27C F = 60MHz RHYST = 4k
40
4k
20
25 5k 6k 20 0 10 15 10 20 30 RTHRESH (k) 40 50 20 30 RTHRESH (k) 40 50 10
OFF
Hysteresis and Forward Active Region
5 RTHRESH = 33k VIN1 4 OFF RHYST = 4k
Hysteresis vs RTHRESH for Different Values of RHYST (Driven Single Ended)
16 VCC = 5V 14 HYST (mV P-P ) 12 FLAG (V) 4k 10 8 6 6k 4 2 10 20 30 RTHRESH (k) 40 50 2k 3k 5k TA = 27C F = 60MHz
3
VTHR
2
FORWARD ACTIVE REGION (shaded) VHYS
1
0N 0 0 5 10 15 20 25 30
VIN (mVP-P)
SD00358
Figure 5. Typical Performance Characteristics (cont)
THEORY OF OPERATION AND APPLICATION
The SA5217 postamplifier is a highly integrated chip that provides up to 60dB of gain at 60MHz, to bring mV level signals up to TTL levels. The SA5217 contains eight amplifier blocks (see Block Diagram). The main signal path is made up of a cascade of limiting stages: A1, A2 and A8. The A3-A4-A7 path performs a wideband full-wave rectification of the input signal with adjustable hysteresis and decay times. It outputs a TTL High on the "FLAG" output (Pin 5) when the input is below a user adjustable threshold. An on-chip LED driver turns the external LED to the On state when the input signal is above the threshold. In a typical application the "FLAG" output is tied back tot he "JAM" input; forcing the "JAM" input to TTL High will latch the TTL Data Out at the last logical state. Threshold voltage and hysteresis voltage range are adjustable with resistors RTHRESH and RHYST. The typical values given in the data sheet will result in performance shown in the graph "Hysteresis and Forward Active Region". A minority of parts may be sensitive enough that FLAG High (Off) occurs below the minimum functional
input signal level, VIN1. This condition is shown by the dotted line in the graph. Such parts may require adjustment of RTHRESH if it is important to guarantee that an output signal is present for the full hysteresis range. If this is not important, RTHRESH may be adjusted to give a FLAG Low for lower level input signals. An auto-zero loop allows the SA5217 to be directly connected to a transimpedance amplifier such as the SA5210, SA5211, or SA5212A without coupling capacitors. This auto-zero loop cancels the transimpedance amplifier's DC offset, the SA5217 A1 offset, and the data-dependent offset in the PIN diode/transimpedance amplifier combination. A typical application of the SA5217 postamplifier is depicted in Figure 6. The system uses the SA5211 transimpedance amplifier which has a 28k differential transimpedance gain and a -3dB bandwidth of 140MHz. this typical application is optimized for a 50Mb/s Non Return to Zero (NRZ) bit stream. As the system's gain bandwidth product is very high, it is crucial to employ good RF design and printed circuit board layout techniques to prevent the system from becoming unstable.
1998 Oct 07
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Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
+VCC 47F C1 C2 .01F
GND
L1 10H R2 220 D1 LED 1 C11 2 100pF 3 4 R3 33k L2 10H 5 6 7 8 9 L3 10H C15 10F C14 .01F R5 10k VOUT (TTL) R4 4k 10 CPKDET THRESH GNDA FLAG JAM VCCD VCCA GNDD TTLOUT IN1A 19 C8 10 0.1F C9 11 12 13 14 LED IN1B 20 100pF 9 GND VCC2 6 5 4 3 2 1 BPF31 OPTICAL INPUT C4 .01F C7 8 GND VCC1 7 R1 100 C5 1.0F
C3
10F
.01F
NE5210
CAZP 18 CAZN 17
GND GND
NC IIN NC GND GND
C6
NE5217
OUT2B 16 IN8B OUT2A IN8A RHYST 15 14
OUT1 GND OUT2
0.1F C10
C13 10F
C12 .01F
13 12
0.1F
RPKDET 11
NOTE: THE NE5210/NE5217 combination can operate at data rates in excess of 100Mb/s NRZ
SD00359
Figure 6. A 50Mb/s Fiber Optic Receiver For more information on this application, please refer to Application Brief AB1432. utilized for wafer sawing and die pick and place into waffle pack carriers, it is impossible to guarantee 100% functionality through this process. There is no post waffle pack testing performed on individual die. Since Philips Semiconductors has no control of third party procedures in the handling or packaging of die, Philips Semiconductors assumes no liability for device functionality or performance of the die or systems on any die sales. Although Philips Semiconductors typically realizes a yield of 85% after assembling die into their respective packages, with care customers should achieve a similar yield. However, for the reasons stated above, Philips Semiconductors cannot guarantee this or any other yield on any die sales.
Die Sales Disclaimer
Due to the limitations in testing high frequency and other parameters at the die level, and the fact that die electrical characteristics may shift after packaging, die electrical parameters are not specified and die are not guaranteed to meet electrical characteristics (including temperature range) as noted in this data sheet which is intended only to specify electrical characteristics for a packaged device. All die are 100% functional with various parametrics tested at the wafer level, at room temperature only (25C), and are guaranteed to be 100% functional as a result of electrical testing to the point of wafer sawing only. Although the most modern processes are
1998 Oct 07
8
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
LED CPKDET 2 1 20
IN1B 19
IN1A
THRESH
3
18
CAZP
GNDA
4
17
CAZN
FLAG
5
JAM
6
VCCD
7
VCCA
8
9 ECN No.: 05379 1992 Jan 27 GNDD
10 VOUT
Figure 7. SA5217 Bonding Diagram
1998 Oct 07
EEEEEE EEEEEE EEEEEE EEEEEE EEEEEE EEEEEE EEEEEE EEEEEE
11 RPKDET 12
16
OUT2B
15
IN8B
14
OUT2A
13
IN8A
RHYST
SD00491
9
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1998 Oct 07
10
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
NOTES
1998 Oct 07
11
Philips Semiconductors
Product specification
Postamplifier with link status indicator
SA5217
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Date of release: 10-98 Document order number: 9397 750 04627
Philips Semiconductors
1998 Oct 07 12

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