TC7652 Datasheet, PDF (1/6 Pages) TelCom Semiconductor, Inc – LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER

1
TC7652
LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER
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FEATURES
GENERAL DESCRIPTION
s Low Offset Over Temperature Range ............ 10µV
s Ultra-Low Long-Term Drift ................. 150nV/Month
s Low Temperature Drift ............................. 100nV/°C
s Low DC Input Bias Current ............................. 15pA
s High Gain, CMRR and PSRR ................. 110dB Min
s Low Input Noise Voltage ......... 0.2µV_P-P; DC to 1Hz
s Internally-Compensated for Unity-Gain Operation
s Clamp Circuit for Fast Overload Recovery
PIN CONFIGURATIONS
The TC7652 is a lower noise version of the TC7650,
sacrificing some input specifications (bias current and band-
width) to achieve a 10x reduction in noise. All the other
benefits of the chopper technique are present, i.e. freedom
from offset adjust, drift, and reliability problems from exter-
3 ^{nal trim components. Like the TC7650, the TC7652 re-}
quires only two noncritical external caps for storing the
chopped null potentials. There are no significant chopping
spikes, internal effects or overrange lockup problems.
CB ₁
CA ₂
NC 3
–INPUT 4
+INPUT 5
NC 6
V_SS 7
TC7652CPD
14 INT/EXT
13
EXT CLK
IN
12
INT CLK
OUT
11 V_DD
10 OUTPUT
9
OUTPUT
CLAMP
8 CRET
CA ₁
–INPUT 2
+INPUT 3
8 CB
7 _VDD
TC7652CPA 6 OUTPUT
V_SS 4
5 CLAMP
ORDERING INFORMATION
Part No.
TC7652CPA
TC7652CPD
Package
8-Pin Plastic DIP
14-Pin Plastic DIP
4 Temperature
Range
0°C to +70°C
0°C to +70°C
NC = NO INTERNAL CONNECTION
(MAY BE USED AS INPUT GUARD)
FUNCTIONAL BLOCK DIAGRAM
5
OUTPUT CLAMP
(NOT ON "Z" PINOUT)
INPUTS
OUTPUT CLAMP
CIRCUIT
MAIN
AMPLIFIER
NULL
OSCILLATOR
AB
B
A
INTERMOD
COMPARATOR
B
NULL
AMPLIFIER
B
A
NULL
NOTE: 1. For 8-pin DIP connect to V_SS, or to C_RET on "Z" pinout.
TELCOM SEMICONDUCTOR, INC.
TC7652
14-PIN DIP ONLY
INT/EXT
EXT CLK IN
CLK OUT
C_EXT
OUTPUT
C
EXT
6
7
C_RET (NOTE 1)
V_SS
8
TC7652-7 9/11/96
3-281