MX7837 Datasheet PDF
Octopart Stock #: O-458689
Findchips Stock #: 458689-F
19-0158; Rev 0; 7/93
Complete, Dual, 12-Bit Multiplying DACs
_______________General Description
The MX7837/MX7847 are dual, 12-bit, multiplying, voltage-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 r
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esistor is internally connected to VOUT on the MX7847. No external 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.
____________________________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)
MX7837/MX7847
______________Ordering Information
PART MX7837JN MX7837KN MX7837JR MX7837KR MX7837C/D TEMP. RANGE 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 PIN-PACKAGE 24 Narrow Plastic DIP 24 Narrow Plastic DIP 24 Wide SO 24 Wide SO Dice* ERROR (LSB) ±1 ±1/2 ±1 ±1/2 ±1
________________________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
Ordering Information continued on last page. * Contact factory for availability and processing to MIL-STD-883.
_________Typical Operating Circuits
VDD
_________________Pin Configurations
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CS 1 RFBA 2 VREFA 3 VOUTA 4 AGNDA 5 VDD 6 VSS 7 AGNDB 8 VOUTB 9 VREFB 10 DGND 11 RFBB 12 24 DB0/DB8 23 DB1/DB9 22 DB2/DB10 21 DB3/DB11 VREFA VREFB
MSB LSB INPUT INPUT LATCH LATCH 4 8 DAC LATCH A 12 DAC A
RFBA VOUTA
AGNDA DB0 DB7 DAC B 12 DAC LATCH B 8 4 LSB MSB INPUT INPUT LATCH LATCH RFBB VOUTB
MX7837
20 DB4 19 DB5 18 DB6 17 DB7 16 A0 15 A1 14 LDAC 13 WR
LDAC CS WR A0 A1
AGNDB
CONTROL LOGIC
MX7837
DIP/SO
DGND
VSS
MX7847 on last page.
MX7847 on last page.
1
________________________________________________________________ Maxim Integrated Products
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Complete, Dual, 12-Bit Multiplying DACs MX7837/MX7847
ABSOLUTE MAXIMUM RATINGS
VDD to DGND, AGNDA, AGNDB ...-0.3V to +17V VSS to DGND, AGNDA, AGNDB (Note 1) ....+0.3V to -17V VREFA, VREFB to AGNDA, AGNDB .. (VSS - 0.3V) to (VDD + 0.3V) AGNDA, AGNDB to DGND-0.3
New data from May 9, 2005
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