MICROCHIP TC913A, TC913B Technical data
TC913A/TC913B
B
Dual Auto-Zeroed Operational Amplifiers
Features
• FirstMonolithic Dual Auto-Zeroed
Operational Amplifier
• Chopper Amplifier PerformanceWithout External
Capacitors
-V
:15µVMax
OS
: Drift; 0.15µV/°C Max
-V
OS
- Saves Cost of External Capacitors
• SOIC Packages Available
• High DC Gain; 120dB
• Low Supply Current; 650µA
• Low Input VoltageNoise
-0.65µV
(0.1Hz to 10Hz)
P-P
• Wide Common Mode Voltage Range
to VDD-2V
-V
SS
• High Common Mode Rejection; 116dB
• Dual or Single Supply Operation:
-±3.3Vto±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
Device Selection Table
Part Number Package
Temp.
Range
TC913ACOA 8-Pin SOIC 0°C t o
+70°C
TC913ACPA 8-Pin PDIP 0°C to
+70°C
TC913BCOA 8-Pin SOIC 0°C t o
+70°C
TC913BCPA 8-Pin PDIP 0°C to
+70°C
Offset
Voltage
15µV
15µV
30µV
30µV
Package Type
PDIP
TC913ACPA
TC913BCPA
-IN A
+IN A
V
SS
1
-
2
3
4
8OUT A
A
+
V
DD
B
OUT B
7
+
-
6
-IN B
+IN B
5
SOIC
TC913ACOA
TC913BCOA
V
8OUT A
DD
B
OUT
7
-
6
-IN B
5
+IN B
-IN A
+IN A
V
1
A
+
-
2
+
3
4
SS
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.
The TC913 pinout matches many popular dual-operationalamplifiers: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 r eplacement; 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.
2002 Microchip TechnologyInc. DS21482B-page 1
TC913A/TC913B
Functional Block Diagram
-Input A
-Input B
+Input A
+Input B
V
SS
48
V
DD
TC913
VOS Correction Amplifier
+
A
–
*
B
A
B
*
Low Impedance
2
6
5
3
1 of 2 Amplifier Shown
*NOTE: Internal capacitors. No external capacitors required.
-
+
Main Amplifier
Output Buffer
+
-
Internal
Oscillator
(f
OSC
200Hz)
1
7
Output A
Output B
DS21482B-page 2
2002 Microchip TechnologyInc.
TC913A/TC913B
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Total Supply Voltage (VDDto VSS) .......................+18V
Input Voltage...................... (V
+0.3V)to (V
DD
SS
-
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 R ating conditions for extended
periodsmay affectdevice reliability.
Current Into Any Pin............................................10mA
While Operating..........................................100µA
Package Power Dissipation (T
–70°C)
A
Plastic DIP ................................................730mW
Plastic SOIC .............................................470mW
Operating Temperature Range
C Device .......................................... 0°C to +70°C
StorageTemperature Range..............-65°C to +150°C
TC913A AND TC913B ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VS=±5V,TA= +25°C, unless otherwise indicated.
TC913A TC913B
Symbol Parameter Min Typ Max Min Typ Max Unit Test Conditions
Input Offset
V
OS
Voltage
TCV
Average Temp.
OS
Coefficient of
Input Offset
Voltage
Average Input
I
B
Bias Current
Average Input
I
OS
Offset Current
Input Voltage
e
N
Noise
CMRR Common Mode
Rejection Ratio
CMVR Common Mode
Voltage Range
Open-Loop
A
OL
Voltage Gain
OUT
OutputVoltage
Swing
V
BW Closed Loop
Bandwidth
SR Slew Rate — 2.5 — — 2.5 — V/µsec R
PSRR Power Supply
Rejection Ratio
Operating
V
S
Supply Voltage
Range
I
Quiescent
S
Supply Current
Note 1: Characterized; not 100% tested.
—515—1530µVTA=+25°C
—
—
0.05
0.05
0.15
0.15
—
—
0.1
0.1
0.25
0.25
µV/°C
µV/°C
0°C ≤ T
-25°C ≤ T
≤ +70°C
A
≤ +85°C
A
(Note 1)
T
—
—
—
—
—
—
—
—
—
—
5
—
0.6
11
90
3
4
20
1
—
—
—
—
—
—
—
—
—
—
—
—
10
—
0.6
11
120
4
6
40
1
—
—
110 116 — 100 110 — dB V
V
SS —
2V
DD -
SS —
V
DD -
V
115 120 — 110 120 — dB RL=10kΩ,V
pA
nA
nA
pAnATA=+25°C
µV
P-P
µV
P-P
2V
=+25°C
A
0°C ≤ T
-25°C ≤ T
T
=+85°C
A
≤ +70°C
A
≤ +85°
A
0.1to1Hz,RS≤ 100Ω
0.1to10Hz,R
≤ VCM≤ VDD-2.2
SS
OUT
VSS+0.3 — VDD-0.9 VSS+0.3 — VDD-0.9 V RL=10kΩ
— 1.5 — — 1.5 — MHz ClosedLoopGain=+1
=10kΩ,CL=50pF
L
110 — — 100 — — dB ±3.3V to ±5.5V
±3.3
6.5
—
—
±8.3
16
±3.3
6.5
—
—
±8.3
16
VVSplit Supply
Single Supply
— 0.65 0.85 — — 1.1 mA VS=±5V
S
≤ 100Ω
=±4V
2002 Microchip TechnologyInc. DS21482B-page 3
TC913A/TC913B
2.0 PIN DESCRIPTIONS
ThedescriptionsofthepinsarelistedinTable2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin No.
(8-Pin PDIP)
(8-Pin SOIC)
1 OUT A Output
2 -IN A InvertingInput
3 +IN A Non-inverting Input
4V
5 +IN B Non-inverting Input
6 -IN B InvertingInput
7 OUT B Output
8V
Symbol Description
SS
DD
Negative Power Supply
Positive Power Supply
DS21482B-page 4
2002 Microchip TechnologyInc.
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