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TC7650 Scheda tecnica(PDF) 1 Page - TelCom Semiconductor, Inc

Il numero della parte TC7650
Spiegazioni elettronici  CHOPPER-STABILIZED OPERATIONAL AMPLIFIER
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Produttore elettronici  TELCOM [TelCom Semiconductor, Inc]
Homepage  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC7650 Scheda tecnica(HTML) 1 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
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CHOPPER-STABILIZED OPERATIONAL AMPLIFIER
TC7650
GENERAL DESCRIPTION
The TC7650 CMOS chopper-stabilized operational
amplifier practically removes offset voltage error terms
from system error calculations. The 5
µV maximum VOS
specification, for example, represents a 15 times improve-
ment over the industry-standard OP07E. The 50nV/
°C off-
set drift specification is over 25 times lower than the OP07E.
The increased performance eliminates VOS trim proce-
dures, periodic potentiometer adjustment and the reliability
problems caused by damaged trimmers.
The TC7650 performance advantages are achieved
without the additional manufacturing complexity and cost
incurred with laser or "zener zap" VOS trim techniques.
The TC7650 nulling scheme corrects both DC VOS
errors and VOS drift errors with temperature. A nulling
amplifier alternately corrects its own VOS errors and the main
amplifier VOS error. Offset nulling voltages are stored on two
user-supplied external capacitors. The capacitors connect
to the internal amplifier VOS null points. The main amplifier
input signal is never switched. Switching spikes are not
present at the TC7650 output.
The 14-pin dual-in-line package (DIP has an external
oscillator input to drive the nulling circuitry for optimum noise
performance. Both the 8 and 14-pin DIPs have an output
voltage clamp circuit to minimize overload recovery time.
PIN CONFIGURATIONS
FEATURES
s Low Input Offset Voltage ......................... 0.7
µV Typ
s Low Input Offset Voltage Drift ......... 0.05
µV/°C Max
s Low Input Bias Current ............................ 10pA Max
s High Impedance Differential CMOS Inputs .... 1012
s High Open-Loop Voltage Gain ................ 120dB Min
s Low Input Noise Voltage ............................ 2.0
µVp-p
s High Slew Rate .......................................... 2.5V/
µsec
s Low-Power Operation ..................................... 20mW
s Output Clamp Speeds Recovery Time
s Compensated Internally for Stable Unity Gain
Operation
s Direct Replacement for ICL7650
s Available in 8-Pin Dip and 14-Pin Dip
FUNCTIONAL BLOCK DIAGRAM
ORDERING INFORMATION
Temperature
Max
Part No.
Package
Range
VOS
TC7650CPA
8-Pin Plastic DIP
0
°C to +70°C5µV
TC7650CPD
14-Pin Plastic DIP
0
°C to +70°C5µV
TC7650
NULL
NULL
INPUTS
OUTPUT
CLAMP
OUTPUT
B
B
A
CEXT
CEXT
FOR 8-PIN DIP, CONNECT TO VSS.
NULL
AMPLIFIER
MAIN
AMPLIFIER
OUTPUT CLAMP
CIRCUIT
INTERMOD
COMPENSATION
OSCILLATOR
AB
INT/EXT
EXT CLK IN
CLK OUT
14-PIN DIP ONLY
BA
CRET
*
*
TC7650-5 9/11/96
1
2
3
4
5
6
7
14
13
12
11
10
9
8
C
NC
(GUARD)
8-Pin DIP
V
SS
V
SS
INT/EXT
EXT CLK
INPUT
INT CLK
OUTPUT
OUTPUT
OUTPUT
CLAMP
RETN
B
C
A
C
VDD
TC7650CPD
1
2
3
4
8
7
6
5
C
OUTPUT
A
V
DD
TC7650CPA
INPUT
INPUT
C
B
(+)
(–)
CLAMP
INPUT
(–)
INPUT
(+)
NC
(GUARD)
14-Pin DIP
NC = NO INTERNAL CONNECTION


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