MICROCHIP TC913B

TC913A/TC913B
Dual Auto-Zeroed Operational Amplifiers
Package Type
Features
• First Monolithic Dual Auto-Zeroed
Operational Amplifier
• Chopper Amplifier Performance Without External
Capacitors
- VOS: 15µV Max
- VOS: Drift; 0.15µV/°C Max
- Saves Cost of External Capacitors
• SOIC Packages Available
• High DC Gain; 120dB
• Low Supply Current; 650µA
• Low Input Voltage Noise
- 0.65µVP-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/µsec
- Unity-Gain Bandwidth; 1.5MHz
• Pin Compatible with LM358, OP-14, MC1458,
ICL7621, TL082, TLC322
Applications
•
•
•
•
•
Instrumentation
Medical Instrumentation
Embedded Control
Temperature Sensor Amplifier
Strain Gage Amplifier
Temp.
Range
Offset
Voltage
8-Pin SOIC
0°C to
+70°C
15µV
TC913ACPA
8-Pin PDIP
0°C to
+70°C
15µV
TC913BCOA
8-Pin SOIC
0°C to
+70°C
30µV
TC913BCPA
8-Pin PDIP
0°C to
+70°C
30µV
Package
TC913ACOA
 2002 Microchip Technology Inc.
OUT A 1
-IN A 2
SS
B
+
+IN A 3
V
8 V
A
- +
DD
7 OUT B
-
4
6 -IN B
5 +IN B
SOIC
TC913ACOA
TC913BCOA
OUT A 1
-IN A 2
+IN A 3
V
8 V DD
A
- +
4
SS
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 0.1µF 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.
Device Selection Table
Part Number
PDIP
TC913ACPA
TC913BCPA
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/µsec.
DS21482B-page 1
TC913A/TC913B
Functional Block Diagram
VDD
VSS
4
8
TC913
VOS Correction Amplifier
+
A
A
–
B
*
B
Internal
Oscillator
(fOSC 200Hz)
*
-Input
-Input
+Input
+Input
A
B
A
B
2
6
5
3
-
Low Impedance
Output Buffer
+
+
Main Amplifier
-
1
7
Output A
Output B
1 of 2 Amplifier Shown
*NOTE: Internal capacitors. No external capacitors required.
DS21482B-page 2
 2002 Microchip Technology Inc.
TC913A/TC913B
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Total Supply Voltage (V DD to VSS) .......................+18V
Input Voltage ...................... (VDD +0.3V) to (VSS -0.3V)
*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.
Current Into Any Pin............................................ 10mA
While Operating .......................................... 100µA
Package Power Dissipation (TA – 70°C)
Plastic DIP ................................................ 730mW
Plastic SOIC ............................................. 470mW
Operating Temperature Range
C Device .......................................... 0°C to +70°C
Storage Temperature Range .............. -65°C to +150°C
TC913A AND TC913B ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VS = ±5V, TA = +25°C, unless otherwise indicated.
TC913A
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Input Offset
Voltage
—
5
15
—
15
30
µV
TCV OS
Average Temp.
Coefficient of
Input Offset
Voltage
—
—
0.05
0.05
0.15
0.15
—
—
0.1
0.1
0.25
0.25
µV/°C
µV/°C
IB
Average Input
Bias Current
—
—
—
—
—
—
90
3
4
—
—
—
—
—
—
120
4
6
pA
nA
nA
TA = +25°C
0°C ≤ TA ≤ +70°C
-25°C ≤ TA ≤ +85°
IOS
Average Input
Offset Current
—
—
5
—
20
1
—
—
10
—
40
1
pA
nA
TA = +25°C
TA = +85°C
eN
Input Voltage
Noise
—
—
0.6
11
—
—
—
—
0.6
11
—
—
µVP-P
µVP-P
VOS
Parameter
TC913B
CMRR
Common Mode
Rejection Ratio
110
116
—
100
110
—
dB
CMVR
Common Mode
Voltage Range
V SS
—
VDD - 2
VSS
—
VDD - 2
V
Open-Loop
Voltage Gain
115
120
—
110
120
—
dB
VSS + 0.3
—
VDD - 0.9
VSS + 0.3
—
VDD -0.9
V
MHz
AOL
V OUT
Output Voltage
Swing
BW
Closed Loop
Bandwidth
—
1.5
—
—
1.5
—
SR
Slew Rate
—
2.5
—
—
2.5
—
Test Conditions
TA = +25°C
0°C ≤ TA ≤ +70°C
-25°C ≤ TA ≤ +85°C
(Note 1)
0.1 to 1 Hz, RS ≤ 100Ω
0.1 to 10 Hz, RS ≤ 100Ω
VSS ≤ VCM ≤ VDD - 2.2
RL = 10 kΩ, VOUT = ±4V
RL = 10 kΩ
Closed Loop Gain = +1
V/µsec RL = 10 kΩ, CL = 50 pF
PSRR
Power Supply
Rejection Ratio
110
—
—
100
—
—
dB
±3.3V to ±5.5V
VS
Operating
Supply Voltage
Range
±3.3
6.5
—
—
±8.3
16
±3.3
6.5
—
—
±8.3
16
V
V
Split Supply
Single Supply
IS
Quiescent
Supply Current
—
0.65
0.85
—
—
1.1
mA
Note
1:
VS = ±5V
Characterized; not 100% tested.
 2002 Microchip Technology Inc.
DS21482B-page 3
TC913A/TC913B
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Pin No.
(8-Pin PDIP)
(8-Pin SOIC)
Symbol
1
OUT A
2
-IN A
Inverting Input
3
+IN A
Non-inverting Input
4
VSS
5
+IN B
Non-inverting Input
6
-IN B
Inverting Input
7
OUT B
8
VDD
DS21482B-page 4
Description
Output
Negative Power Supply
Output
Positive Power Supply
 2002 Microchip Technology Inc.
TC913A/TC913B
3.0
DETAILED DESCRIPTION
3.3
3.1
Theory of Operation
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.
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.
3.2
Pin Compatibility
3.4
Overload Recovery
Avoiding Latchup
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
TC913A/TC913B
4.0
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.
Input Offset Voltage vs.
Common Mode Voltage
Supply Current vs. ± Supply Voltage
1200
800
600
400
200
0
2
3
4
5
6
± SUPPLY VOLTAGE (V)
7
8
± OUTPUT VOLTAGE (V)
Output Voltage Swing vs.
Load Resistance
TA = +25˚C
VS = ±5V
4.2
30
225
VS = ±5V
40
TA = +25˚C
CLOSED-LOOP GAIN (dB)
INPUT OFFSET VOLTAGE (µV)
SUPPLY CURRENT (µA)
VA = ±5V
1000
5.0
Gain and Phase vs. Frequency
50
35
TA = +25˚C
25
20
15
PHASE
30
180
TA = +25˚C
Ω
RL = 10 k
135
GAIN
20
90
10
45
0
0
-10
-45
-20
-90
5
-30
-135
0
-40
10k
10
-6
-5 -4 -3 -2 -1 0 1 2 3 4
INPUT COMMON MODE VOLTAGE (V)
Negative Overload Recovery Time
PHASE (deg)
Note:
-180
10M
100k
1M
FREQUENCY (Hz)
Positive Overload Recovery Time
Ω
RL = 10 k
-SWING
TA = +25˚C
+SWING
OUTPUT =
2 V/DIV
INPUT
0V
0V
3.4
2.6
OUTPUT
= 2 V/DIV
1.8
Gain = –20
1.0
100
1k
10k
100k
LOAD RESISTANCE (Ω)
DS21482B-page 6
1M
HORIZONTAL SCALE = 20 msec/DIV
INPUT
INPUT
GAIN = –20
HORIZONTAL SCALE = 20 msec/DIV
 2002 Microchip Technology Inc.
TC913A/TC913B
5.0
PACKAGING INFORMATION
5.1
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
8-Pin SOIC (N)
 2002 Microchip Technology Inc.
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
12 mm
8 mm
2500
13 in
DS21482B-page 7
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)
.010 (0.25)
.007 (0.18)
8° MAX..
.020 (0.51) .010 (0.25)
.013 (0.33) .004 (0.10)
.050 (1.27)
.016 (0.40)
Dimensions: inches (mm)
8-Pin Plastic DIP
PIN 1
.260 (6.60)
.240 (6.10)
.045 (1.14)
.030 (0.76)
.070 (1.78)
.040 (1.02)
.310 (7.87)
.290 (7.37)
.400 (10.16)
.348 (8.84)
.200 (5.08)
.140 (3.56)
.040 (1.02)
.020 (0.51)
.150 (3.81)
.115 (2.92)
.110 (2.79)
.090 (2.29)
.022 (0.56)
.015 (0.38)
.015 (0.38)
.008 (0.20)
3° MIN.
.400 (10.16)
.310 (7.87)
Dimensions: inches (mm)
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
TC913A/TC913B
NOTES:
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.
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© 2002, Microchip Technology Incorporated, Printed in the
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Printed on recycled paper.
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 2002 Microchip Technology Inc.
DS21482B-page 11
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04/20/02
*DS21482B*
DS21482B-page 12
 2002 Microchip Technology Inc.