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 TC913A/TC913B
Dual Auto-Zeroed Operational Amplifiers
Features
* First Monolithic Dual Auto-Zeroed Operational Amplifier * Chopper Amplifier Performance Without External Capacitors - VOS: 15V Max - VOS: Drift; 0.15V/C Max - Saves Cost of External Capacitors * SOIC Packages Available * High DC Gain; 120dB * Low Supply Current; 650A * Low Input Voltage Noise - 0.65VP-P (0.1Hz to 10Hz) * Wide Common Mode Voltage Range - VSS to VDD - 2V * High Common Mode Rejection; 116dB * Dual or Single Supply Operation: - 3.3V to 8.3V - +6.5V to +16V * Excellent AC Operating Characteristics - Slew Rate; 2.5V/sec - Unity-Gain Bandwidth; 1.5MHz * Pin Compatible with LM358, OP-14, MC1458, ICL7621, TL082, TLC322
Package Type
PDIP TC913ACPA TC913BCPA
OUT A 1 -IN A 2 +IN A 3 V
SS
A +A +-
8V B +
DD
7 OUT B 6 -IN B 5 +IN B
4
SOIC TC913ACOA TC913BCOA
OUT A 1 -IN A 2 +IN A 3 V 4 SS 8 V DD B + 7 OUT B 6 -IN B 5 +IN B
General Description
The TC913 is the world's first complete monolithic, dual auto-zeroed operational amplifier. The TC913 sets a new standard for low power, precision dual-operational amplifiers. Chopper-stabilized or auto-zeroed amplifiers offer low offset voltage errors by periodically sampling offset error, and storing correction voltages on capacitors. Previous single amplifier designs required two user-supplied, external 0.1F error storage correction capacitors -- much too large for on-chip integration. The unique TC913 architecture requires smaller capacitors, making on-chip integration possible. Microvolt offset levels are achieved and external capacitors are not required. The TC913 system benefits are apparent when contrasted with a TC7650 chopper amplifier circuit implementation. A single TC913 replaces two TC7650's and four capacitors. Five components and assembly steps are eliminated.
Applications
* * * * * Instrumentation Medical Instrumentation Embedded Control Temperature Sensor Amplifier Strain Gage Amplifier
Device Selection Table
Part Number TC913ACOA TC913ACPA TC913BCOA TC913BCPA Package 8-Pin SOIC 8-Pin PDIP 8-Pin SOIC 8-Pin PDIP Temp. Range 0C to +70C 0C to +70C 0C to +70C 0C to +70C Offset Voltage 15V 15V 30V 30V
The TC913 pinout matches many popular dual-operational amplifiers: OP-04, TLC322, LM358, and ICL7621 are typical examples. In many applications, operating from dual 5V power supplies or single supplies, the TC913 offers superior electrical performance, and can be a functional drop-in replacement; printed circuit board rework is not necessary. The TC913's low offset voltage error eliminates offset voltage trim potentiometers often needed with bipolar and low accuracy CMOS operational amplifiers. The TC913 takes full advantage of Microchip's proprietary CMOS technology. Unity gain bandwidth is 1.5MHz and slew rate is 2.5V/sec.
2002 Microchip Technology Inc.
DS21482B-page 1
(c)
TC913A/TC913B
Functional Block Diagram
VSS 4 VDD 8
TC913
VOS Correction Amplifier
+
A
- *
B
A B
Internal Oscillator (fOSC 200Hz)
*
-Input -Input +Input +Input A B A B 2 6 5 3
+
Main Amplifier 1 of 2 Amplifier Shown
Low Impedance Output Buffer
+ -
1 7
Output A Output B
*NOTE: Internal capacitors. No external capacitors required.
(c)
DS21482B-page 2
2002 Microchip Technology Inc.
TC913A/TC913B
1.0 ELECTRICAL CHARACTERISTICS
*Stresses above 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 above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
Absolute Maximum Ratings*
Total Supply Voltage (V DD to VSS) .......................+18V Input Voltage ...................... (VDD +0.3V) to (VSS -0.3V) Current Into Any Pin............................................ 10mA While Operating .......................................... 100A Package Power Dissipation (TA - 70C) Plastic DIP ................................................ 730mW Plastic SOIC ............................................. 470mW Operating Temperature Range C Device .......................................... 0C to +70C Storage Temperature Range .............. -65C to +150C
TC913A AND TC913B ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VS = 5V, TA = +25C, unless otherwise indicated. TC913A Symbol VOS TCV OS Parameter Input Offset Voltage Average Temp. Coefficient of Input Offset Voltage Average Input Bias Current Average Input Offset Current Input Voltage Noise Common Mode Rejection Ratio Common Mode Voltage Range Open-Loop Voltage Gain Output Voltage Swing Closed Loop Bandwidth Slew Rate Power Supply Rejection Ratio Operating Supply Voltage Range Quiescent Supply Current
1:
TC913B Max 15 0.15 0.15 Min -- -- -- Typ 15 0.1 0.1 Max 30 0.25 0.25 Unit V V/C V/C Test Conditions TA = +25C 0C TA +70C -25C TA +85C (Note 1) TA = +25C 0C TA +70C -25C TA +85 TA = +25C TA = +85C 0.1 to 1 Hz, RS 100 0.1 to 10 Hz, RS 100 VSS VCM VDD - 2.2
Min -- -- --
Typ 5 0.05 0.05
IB
-- -- -- -- -- -- -- 110 V SS 115 VSS + 0.3 -- -- 110 3.3 6.5 --
-- -- -- 5 -- 0.6 11 116
--
90 3 4 20 1 -- -- -- VDD - 2 -- VDD - 0.9 -- -- -- 8.3 16 0.85
-- -- -- -- -- -- -- 100 VSS 110 VSS + 0.3 -- -- 100 3.3 6.5 --
-- -- -- 10 -- 0.6 11 110
--
120 4 6 40 1 -- -- -- VDD - 2 -- VDD -0.9 -- -- -- 8.3 16 1.1
pA nA nA pA nA VP-P VP-P dB V dB V MHz
IOS eN CMRR CMVR AOL V OUT BW SR PSRR VS
120 -- 1.5 2.5 -- -- -- 0.65
120 -- 1.5 2.5 -- -- -- --
RL = 10 k, VOUT = 4V RL = 10 k Closed Loop Gain = +1
V/sec RL = 10 k, CL = 50 pF dB V V mA 3.3V to 5.5V Split Supply Single Supply VS = 5V
IS
Note
Characterized; not 100% tested.
2002 Microchip Technology Inc.
DS21482B-page 3
(c)
TC913A/TC913B
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (8-Pin PDIP) (8-Pin SOIC) 1 2 3 4 5 6 7 8
PIN FUNCTION TABLE
Symbol OUT A -IN A +IN A VSS +IN B -IN B OUT B VDD Output Inverting Input Non-inverting Input Negative Power Supply Non-inverting Input Inverting Input Output Positive Power Supply Description
(c)
DS21482B-page 4
2002 Microchip Technology Inc.
TC913A/TC913B
3.0
3.1
DETAILED DESCRIPTION
Theory of Operation
3.3
Overload Recovery
Each of the TC913's two Op Amps actually consists of two amplifiers. A main amplifier is always connected from the input to the output. A separate nulling amplifier alternately nulls its own offset and then the offset of the amplifier. Since each amplifier is continuously being nulled, offset voltage drift with time, temperature and power supply variations is greatly reduced. All nulling circuitry is internal and the nulling operation is transparent to the user. Offset nulling voltages are stored on two internal capacitors. An internal oscillator and control logic, shared by the TC913's two amplifiers, control the nulling process.
The TC913 recovers quickly from output saturation. Typical recovery time from positive output saturation is 20 msec. Negative output saturation recovery time is typically 5 msec.
3.4
Avoiding Latchup
3.2
Pin Compatibility
Junction-isolated CMOS circuits inherently contain a parasitic p-n-p-n transistor circuit. Voltages exceeding the supplies by 0.3V should not be applied to the device pins. Larger voltages can turn the p-n-p-n device on, causing excessive device power supply current and power dissipation. The TC913's power supplies should be established at the same time or before input signals are applied. If this is not possible, input current should be limited to 0.1mA to avoid triggering the p-n-p-n structure.
The TC913 pinout is compatible with OP-14, LM358, MC1458, LT1013, TLC322, and similar dual Op Amps. In many circuits operating from single or 5V supplies, the TC913 is a drop-in replacement offering DC performance rivaling that of the best single Op Amps. The TC913's amplifiers include a low-impedance class AB output buffer. Some previous CMOS chopper amplifiers used a high impedance output stage which made open-loop gain dependent on load resistance. The TC913's open-loop gain is not dependent on load resistance.
2002 Microchip Technology Inc.
DS21482B-page 5
(c)
TC913A/TC913B
4.0
Note:
TYPICAL CHARACTERISTICS
The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Supply Current vs. Supply Voltage
1200
Input Offset Voltage vs. Common Mode Voltage
35
50 VA = 5V INPUT OFFSET VOLTAGE (V) TA = +25C 40 CLOSED-LOOP GAIN (dB) 30 20 10 0 -10 -20 -30 -6 -5 -4 -3 -2 -1 0 1 2 3 4 INPUT COMMON MODE VOLTAGE (V)
Gain and Phase vs. Frequency
225 VS = 5V PHASE GAIN TA = +25C RL = 10 k 180 135 90 45 0 -45 -90 -135 100k 1M FREQUENCY (Hz) -180 10M PHASE (deg)
TA = +25C SUPPLY CURRENT (A)
1000 800 600 400 200 0 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 8
30 25 20 15 10 5 0
-40 10k
Output Voltage Swing vs. Load Resistance
TA = +25C VS = 5V
Negative Overload Recovery Time
RL = 10 k TA = +25C
Positive Overload Recovery Time
OUTPUT VOLTAGE (V)
5.0 4.2 3.4 2.6 1.8
-SWING
OUTPUT = 2 V/DIV INPUT
+SWING
0V 0V
OUTPUT = 2 V/DIV
Gain = -20
INPUT GAIN = -20
INPUT
1.0 100
1k 10k 100k LOAD RESISTANCE ()
1M
HORIZONTAL SCALE = 20 msec/DIV
HORIZONTAL SCALE = 20 msec/DIV
(c)
DS21482B-page 6
2002 Microchip Technology Inc.
TC913A/TC913B
5.0
5.1
PACKAGING INFORMATION
Package Marking Information
Package marking data not available at this time.
5.2
Taping Form
Component Taping Orientation for 8-Pin SOIC (Narrow) Devices
User Direction of Feed
PIN 1
W
P Standard Reel Component Orientation for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
8-Pin SOIC (N)
12 mm
8 mm
2500
13 in
2002 Microchip Technology Inc.
DS21482B-page 7
(c)
TC913A/TC913B
5.3 Package Dimensions
8-Pin SOIC
PIN 1
.157 (3.99) .150 (3.81)
.244 (6.20) .228 (5.79)
.050 (1.27) TYP.
.197 (5.00) .189 (4.80) .069 (1.75) .053 (1.35) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) .010 (0.25) .007 (0.18) .050 (1.27) .016 (0.40) Dimensions: inches (mm)
8 MAX. .
8-Pin Plastic DIP
PIN 1
.260 (6.60) .240 (6.10)
.045 (1.14) .030 (0.76) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92)
.070 (1.78) .040 (1.02)
.310 (7.87) .290 (7.37)
.040 (1.02) .020 (0.51)
.015 (0.38) .008 (0.20) .400 (10.16) .310 (7.87)
3 MIN.
.110 (2.79) .090 (2.29)
.022 (0.56) .015 (0.38)
Dimensions: inches (mm)
(c)
DS21482B-page 8
2002 Microchip Technology Inc.
TC913A/TC913B
SALES AND SUPPORT
Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21482B-page 9
(c)
TC913A/TC913B
NOTES:
(c)
DS21482B-page 10
2002 Microchip Technology Inc.
TC913A/TC913B
Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company's quality system processes and procedures are QS-9000 compliant for its PICmicro (R) 8-bit MCUs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21482B-page 11
(c)
WORLDWIDE SALES AND SERVICE
AMERICAS
Corporate Office
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04/20/02
(c)
DS21482B-page 12
2002 Microchip Technology Inc.
*B28412SD*


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