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TC7652 Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc

Part # TC7652
Description  LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER
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Manufacturer  TELCOM [TelCom Semiconductor, Inc]
Direct Link  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC7652 Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
TC7652
LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
8
7
6
5
C
A
OUTPUT
TC7652CPA
–INPUT
+INPUT
VSS
VSS
VDD
VDD
C
B
CLAMP
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NC
NC = NO INTERNAL CONNECTION
(MAY BE USED AS INPUT GUARD)
INT/EXT
EXT CLK
IN
INT CLK
OUT
OUTPUT
OUTPUT
CLAMP
RET
C
–INPUT
+INPUT
NC
TC7652CPD
C
B
C
A
TC7652
NULL
NULL
OUTPUT
B
B
A
C
EXT
C
EXT
CRET (NOTE 1)
NULL
AMPLIFIER
MAIN
AMPLIFIER
OUTPUT CLAMP
CIRCUIT
INTERMOD
COMPARATOR
OSCILLATOR
B
A
INT/EXT
EXT CLK IN
CLK OUT
14-PIN DIP ONLY
BA
INPUTS
OUTPUT CLAMP
(NOT ON "Z" PINOUT)
NOTE: 1. For 8-pin DIP connect to VSS, or to CRET on "Z" pinout.
VSS
TC7652-7 9/11/96
FEATURES
s
Low Offset Over Temperature Range ............ 10
µV
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 ......... 0.2
µVP-P; DC to 1Hz
s
Internally-Compensated for Unity-Gain Operation
s
Clamp Circuit for Fast Overload Recovery
GENERAL DESCRIPTION
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-
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.
PIN CONFIGURATIONS
ORDERING INFORMATION
Temperature
Part No.
Package
Range
TC7652CPA
8-Pin Plastic DIP
0
°C to +70°C
TC7652CPD
14-Pin Plastic DIP
0
°C to +70°C


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