Rainbow Electronics MX7847 - Manual

_______________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 2k
Ω
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
____________________________Features
♦ Two 12-Bit Multiplying DACs with Buffered
Voltage Output
♦ Specified with ±12V or ±15V Supplies
♦ No External Adjustments Required
♦ Fast Timing Specifications
♦ 24-Pin DIP and SO Packages
♦ 12-Bit Parallel Interface (MX7847)
8-Bit + 4-Bit Interface (MX7837)
______________Ordering Information
Ordering Information continued on last page.
* Contact factory for availability and processing to MIL-STD-883.
MX7837/MX7847
Complete, Dual, 12-Bit
Multiplying DACs
________________________________________________________________ Maxim Integrated Products 1
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12 13
DB0/DB8
DB1/DB9
DB2/DB10
DB3/DB11
DB4
DB5
DB6
DB7
A0
A1
LDAC
WR R FBB
DGND
V REFB
V OUTB
AGNDB
V SS
V DD
AGNDA
V
OUTA
V REFA
R FBA
CS
DIP/SO
TOP VIEW
MX7837
14
MX7847 on last page.
_________________Pin Configurations
4 8
12
DAC LATCH A
MSB
INPUT
LATCH
LSB
INPUT
LATCH
DAC A
4 8
12
DAC LATCH B
MSB
INPUT
LATCH
LSB
INPUT
LATCH
DAC B
CONTROL
LOGIC
LDAC
CS
WR
A0
A1
DB7
DB0
V
REFB
V REFA
R FBA
V
OUTA
AGNDA
R FBB
V OUTB
AGNDB
DGND V SS
V DD
MX7837
MX7847 on last page.
_________Typical Operating Circuits
Call toll free 1-800-998-8800 for free samples or literature.
19-0158; Rev 0; 7/93
PART TEMP. RANGE PIN-PACKAGE
MX7837 JN 0°C to +70°C 24 Narrow Plastic DIP
MX7837KN 0°C to +70°C 24 Narrow Plastic DIP
MX7837JR 0°C to +70°C 24 Wide SO
MX7837KR 0°C to +70°C 24 Wide SO
MX7837C/D 0°C to +70°C Dice*
ERROR
(LSB)
±1
±1/2
±1
±1/2
±1