MX7837 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Complete, Dual, 12-Bit Multiplying DACs

19-0158; Rev 0; 7/93
Complete, Dual, 12-Bit
Multiplying DACs
_______________General Description
The MX7837/MX7847 are dual, 12-bit, multiplying, volt-
age-output digital-to-analog converters (DACs). Each
DAC has an output amplifier and a feedback resistor.
The output amplifier is capable of developing ±10V
across a 2kΩ load. The amplifier feedback resistor is
internally connected to V_OUT on the MX7847. No exter-
nal trims are required to achieve full 12-bit performance
over the entire operating temperature range.
The MX7847 has a 12-bit parallel data input, whereas
the MX7837 operates with a double-buffered 8-bit-bus
interface that loads data in two write operations. All
logic signals are level triggered and are TTL and CMOS
compatible. Fast timing specifications make these
DACs compatible with most microprocessors.
________________________Applications
Small Component-Count Analog Systems
Digital Offset/Gain Adjustments
Industrial Process Control
Function Generators
Automatic Test Equipment
Automatic Calibration
Machine and Motion Control Systems
Waveform Reconstruction
Synchro Applications
_________________Pin Configurations
TOP VIEW
CS ₁
R_FBA 2
V_REFA 3
V_OUTA 4
AGNDA 5
V_{DD 6}
V_SS 7
AGNDB ₈
V_OUTB 9
V_REFB 10
DGND ₁₁
R_{FBB 12}
MX7847 on last page.
MX7837
24 DB0/DB8
23 DB1/DB9
22 ^DB2/DB10
21 DB3/DB11
20 DB4
19 ^DB5
18 DB6
17 DB7
16 A0
15 A1
14 LDAC
13 WR
DIP/SO
____________________________Features
o Two 12-Bit Multiplying DACs with Buffered
Voltage Output
o Specified with ±12V or ±15V Supplies
o No External Adjustments Required
o Fast Timing Specifications
o 24-Pin DIP and SO Packages
o 12-Bit Parallel Interface (MX7847)
8-Bit + 4-Bit Interface (MX7837)
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
ERROR
(LSB)
MX7837JN
MX7837KN
MX7837JR
MX7837KR
MX7837C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
24 Narrow Plastic DIP
24 Narrow Plastic DIP
24 Wide SO
24 Wide SO
Dice*
±1
±1/2
±1
±1/2
±1
Ordering Information continued on last page.
* Contact factory for availability and processing to MIL-STD-883.
_________Typical Operating Circuits
V_DD
V_REFA
V_REFB
DB0
DB7
LDAC
CS
WR
A0
A1
CONTROL
LOGIC
DGND
MX7847 on last page.
MSB
INPUT
LATCH
4
LSB
INPUT
LATCH
8
DAC LATCH A
12
DAC A
DAC B
12
DAC LATCH B
4
8
MSB LSB
INPUT INPUT
LATCH LATCH
MX7837
R_FBA
V_OUTA
AGNDA
R_FBB
V_OUTB
AGNDB
V_SS
________________________________________________________________ Maxim Integrated Products 1
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