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TC911A
TC911B
AUTO-ZEROED OPERATIONAL AMPLIFIERS
FEATURES
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First Monolithic Chopper-Stabilized Amplifier
With On-Chip Nulling Capacitors
Offset Voltage .................................................... 5
µ
V
Offset Voltage Drift .................................. 0.05
µ
V/
°
C
Low Supply Current ...................................... 350
µ
A
High Common-Mode Rejection .................... 116dB
Single Supply Operation ....................... 4.5V to 16V
High Slew Rate ............................................. 2.5V/
µ
s
Wide Bandwidth ............................................1.5MHz
High Open-Loop Voltage Gain
(R
L
= 10 kΩ) .................................................... 120dB
Low Input Voltage Noise
(0.1 Hz to 1 Hz) .......................................... 0.65
µ
V
P-P
Pin Compatible With ICL7650
Lower System Parts Count
GENERAL DESCRIPTION
The TC911 CMOS auto-zeroed operational amplifier is
the first complete monolithic chopper-stabilized amplifier.
Chopper operational amplifiers like the ICL7650/7652 and
LTC1052 require user-supplied, external offset compensa-
tion storage capacitors.
External capacitors are not re-
quired with the TC911.
Just as easy to use as the conven-
tional OP07 type amplifier, the TC911 significantly reduces
offset voltage errors. Pinout matches the OP07/741/7650
8-pin mini-DIP configuration.
Several system benefits arise by eliminating the exter-
nal chopper capacitors: lower system parts count, reduced
assembly time and cost, greater system reliability, reduced
PC board layout effort and greater board area utilization.
Space savings can be significant in multiple-amplifier de-
signs.
Electrical specifications include 15µV maximum offset
voltage, 0.15µV/°C maximum offset voltage temperature
coefficient. Offset voltage error is five times lower than the
premium OP07E bipolar device. The TC911 improves off-
set drift performance by eight times.
The TC911 operates from dual or single power sup-
plies. Supply current is typically 350µA. Single 4.5V to 16V
supply operation is possible, making single 9V battery
operation possible. The TC911 is available in 2 package
types: 8-pin plastic DIP and SOIC.
PIN CONFIGURATION
(SOIC and DIP)
0°C to +70°C
0°C to +70°C
30µV
30µV
NC 1
– INPUT 2
+ INPUT 3
V
SS
4
TC911ACPA
TC911BCPA
8 NC
7 V
DD
6 OUTPUT
5 NC
NC 1
– INPUT 2
+ INPUT 3
V
SS
4
8 NC
7 V
DD
TC911ACOA 6 OUTPUT
TC911BCOA
5 NC
2
3
4
5
6
7
ORDERING INFORMATION
Temperature
Range
0°C to +70°C
0°C to +70°C
Part No.
TC911ACOA
TC911ACPA
TC911BCOA
TC911BCPA
Package
8-Pin SOIC
8-Pin
Plastic DIP
8-Pin SOIC
8-Pin
Plastic DIP
Maximum
Offset
Voltage
15µV
15µV
FUNCTIONAL BLOCK DIAGRAM
VDD
4
VSS
7
V CORRECTION AMPLIFIER
OS
A
–
B
B
INTERNAL
OSCILLATOR
(fOSC
≈
200 Hz)
NC = NO INTERNAL CONNECTION
–INPUT
2
+
*
*
A
+INPUT
3
+
TC911
LOW IMPEDANCE
OUTPUT BUFFER
+
–
MAIN
AMPLIFIER
–
6
OUTPUT
*
NOTE:
Internal capacitors. No external capacitors required.
TC911/A/B-7 9/11/96
8
3-263
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
