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ICL7121JMJI Datasheet

  • ICL7121JMJI

  • 16-Bit Multiplying Microprocessor-Compatible D/A Converter

  • 10頁

  • INTERSIL   INTERSIL

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廬
October 1997
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ICL7121
16-Bit Multiplying
Microprocessor-Compatible D/A Converter
Description
The ICL7121 achieves 0.003% linearity without laser
trimming by combining a four quadrant multiplying DAC
using thin film resistors with an on-chip PROM-controlled
correction circuit. Silicon-gate CMOS circuitry keeps the
power dissipation very low.
Microprocessor bus interfacing is eased using standard
memory WRITE cycle timing and control. The input buffer
register is loaded with the 16-bit input and directly controls
the output switches. The register is transparent if WR and
CS are held low.
The ICL7121 is designed and programmed for bipolar
operation. There is an offset resistor to the output which
should be connected to -V
REF
and an inverter on the MSB
line, giving the DAC a 2鈥檚 complement bipolar transfer
function. Two extra resistors are included on the chip to
facilitate the reference inversion, so that only an external op-
amp is needed.
Features
鈥?16-Bit Resolution
鈥?Low Integral Linearity Error -0.003% FSR
鈥?Monotonic to 16 Bits Over Full Military Temperature
Range (LM Grade)
鈥?Microprocessor Compatible with Buffered Inputs
鈥?Bipolar Application Requires No External Resistors
鈥?Output Current Settling Time 3碌s Max (1碌s Typ)
鈥?Low Linerarity and Gain Temperature Coefficients
鈥?Low Power Dissipation (25mW)
鈥?Full Four-Quadrant Multiplication
鈥?Low Differential Nonlinearity Error at Bipolor Zero
Ordering Information
PART NUMBER
ICL7121JCJI
ICL7121JMJI
ICL7121KCJI
ICL7121KMJI
ICL7121LCJI
ICL7121LMJI
TEMP. RANGE
(
o
C)
0 to 70
-55 to 125
0 to 70
-55 to 125
0 to 70
-55 to 125
PACKAGE
28 Ld CERDIP
28 Ld CERDIP
28 Ld CERDIP
28 Ld CERDIP
28 Ld CERDIP
28 Ld CERDIP
Pinout
ICL7121
(OUTLINE DWG JI)
TOP VIEW
(LSB) D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
1
2
3
4
5
6
7
8
9
28 CS
27 WR
26 V+
25 I
OUT
24 AGND
S
23 AGND
F
22 DGND
21 R
FB
20 R
OFS
19 R
INV
18 V
REF
17 PROG
16 D
15
(MSB)
15 D
14
D
9
10
D
10
11
D
11
12
D
12
13
D
13
14
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
1
File Number
3112.1

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