LTC1595

Features:

SO-8 Package (LTC1595)
DNL and INL: 1LSB Max
Low Glitch Impulse: 1nV-s Typ
Fast Settling to 1LSB: 2µs (with LT1468)
Pin Compatible with Industry Standard ,12-Bit DACs: DAC8043 and DAC8143/AD7543
4-Quadrant Multiplication
Low Supply Current: 10µA Max
Power-On Reset ,LTC1595/LTC1596: Resets to Zero Scale ,LTC1596-1: Resets to Midscale
3-Wire SPI and MICROWIRETM,Compatible
Serial Interface
Daisy-Chain Serial Output (LTC1596)
Asynchronous Clear Input,LTC1596: Clears to Zero Scale ,LTC1596-1: Clears to Midscale


Application

Process Control and Industrial Automation
Software Controlled Gain Adjustment
Digitally Controlled Filter and Power Supplies
Automatic Test Equipment


Pinout




Specifications

VDD to AGND ..............................................  0.5V to 7V
VDD to DGND ..............................................  0.5V to 7V
AGND to DGND............................................  VDD + 0.5V
DGND to AGND............................................. VDD + 0.5V
VREF to AGND, DGND............................................. ±25V
RFB to AGND, DGND .............................................. ±25V
Digital Inputs to DGND ................ 0.5V to (VDD + 0.5V)
VOUT1, VOUT2 to AGND .................0.5V to (VDD + 0.5V)
Maximum Junction Temperature .......................... 150°C
Operating Temperature Range
LTC1595C/LTC1596C/LTC1596-1C ........       0°C to 70°C
LTC1595I/LTC1596I/LTC1596-1I ......        40°C to 85°C
Storage Temperature Range ................  65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................  300°C

Description

The LTC® 1595/LTC1596/LTC1596-1 are serial input, 16-bit multiplying current output DACs. The LTC1595 is pin and hardware compatible with the 12-bit DAC8043 and comes in 8-pin PDIP and SO packages. The LTC1596 is pin and hardware compatible with the 12-bit DAC8143/AD7543 and comes in 16-pin PDIP and SO wide packages.

Both are specified over the industrial temperature range. Sensitivity of INL to op amp VOS is reduced by five times compared to the industry standard 12-bit DACs, so most systems can be easily upgraded to true 16-bit resolution and linearity without requiring more precise op amps. These DACs include an internal deglitching circuit that reduces the glitch impulse by more than ten times to less than 1nV-s typ.