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LF13006 Datasheet

  • LF13006

  • Digital Gain Set

  • 8頁

  • NSC

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LF13006 LF13007 Digital Gain Set
February 1995
LF13006 LF13007 Digital Gain Set
General Description
The LF13006 and LF13007 are precision digital gain sets
used for accurately setting non-inverting op amp gains
Gains are set with a 3-bit digital word which can be latched
in with WR and CS pins All digital inputs are TTL and CMOS
compatible
The LF13006 shown below will set binary scaled gains of 1
2 4 8 16 32 64 and 128 The LF13007 will set gains of 1
2 5 10 20 50 and 100 (a common attenuator sequence)
In addition both versions have several taps and two uncom-
mitted matching resistors that allow customization of the
gain
The gains are set with precision thin film resistors The low
temperature coefficient of the thin film resistors and their
excellent tracking result in gain ratios which are virtually in-
dependent of temperature
The LF13006 LF13007 used in conjunction with an amplifi-
er not only satisfies the need for a digitally programmable
amplifier in microprocessor based systems but is also use-
ful for discrete applications eliminating the need to find
0 5% resistors in the ratio of 100 to 1 which track each
other over temperature
Features
Y
Y
Y
Y
Y
Y
TTL and CMOS compatible logic levels
Microprocessor compatible
Gain error 0 5% max
Binary or scope knob gains
Wide supply range
a
5V to
g
18V
Packaged in 16-pin DIP
Block Diagram and Typical Application
(LF13006)
TL H 5114 鈥?1
Note
R
j
15 kX
Order Number LF13006N or LF13007N
See NS Package Number N16A
C
1995 National Semiconductor Corporation
TL H 5114
RRD-B30M115 Printed in U S A

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