TC911A Datasheet, PDF (1/5 Pages) TelCom Semiconductor, Inc – AUTO-ZEROED OPERATIONAL AMPLIFIERS

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TC911A
TC911B
AUTO-ZEROED OPERATIONAL AMPLIFIERS
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FEATURES
GENERAL DESCRIPTION
s First Monolithic Chopper-Stabilized Amplifier
With On-Chip Nulling Capacitors
s Offset Voltage .................................................... 5µV
s Offset Voltage Drift .................................. 0.05µV/°C
s Low Supply Current ...................................... 350µA
s High Common-Mode Rejection .................... 116dB
s Single Supply Operation ....................... 4.5V to 16V
s High Slew Rate ............................................. 2.5V/µs
s Wide Bandwidth ............................................1.5MHz
s High Open-Loop Voltage Gain
(R_L = 10 kΩ) .................................................... 120dB
s Low Input Voltage Noise
(0.1 Hz to 1 Hz) .......................................... 0.65µV_P-P
s Pin Compatible With ICL7650
s Lower System Parts Count
ORDERING INFORMATION
Part No.
TC911ACOA
TC911ACPA
TC911BCOA
TC911BCPA
Temperature
Package
Range
8-Pin SOIC
8-Pin
Plastic DIP
8-Pin SOIC
8-Pin
Plastic DIP
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Maximum
Offset
Voltage
15µV
15µV
30µV
30µV
FUNCTIONAL BLOCK DIAGRAM
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-
3 ^{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.
4 ^{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
5 ^{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)
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}
NC = NO INTERNAL CONNECTION
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VDD
VSS
4
7
–INPUT
2
VOS CORRECTION AMPLIFIER
+
A
–
B
*
B
INTERNAL
OSCILLATOR
(fOSC ≈ 200 Hz)
7
A
3
+INPUT
*
+
– _MAIN
AMPLIFIER
TC911
LOW IMPEDANCE
+ OUTPUT BUFFER
–
6
OUTPUT
*NOTE: Internal capacitors. No external capacitors required.
TELCOM SEMICONDUCTOR, INC.
TC911/A/B-7 9/11/96
3-263
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