LTC1595 Datasheet, PDF (1/12 Pages) Linear Technology – Serial 16-Bit Multiplying DACs

LTC1595/LTC1596/LTC1596-1
Serial 16-Bit
Multiplying DACs
FEATURES
s _{SO-8 Package (LTC1595)}
s _{DNL and INL: 1LSB Max}
s _{Low Glitch Impulse: 1nV-s Typ}
s _{Fast Settling to 1LSB: 2µs (with LT1468)}
s _{Pin Compatible with Industry Standard}
12-Bit DACs: DAC8043 and DAC8143/AD7543
s _{4-Quadrant Multiplication}
s _{Low Supply Current: 10µA Max}
s _{Power-On Reset}
LTC1595/LTC1596: Resets to Zero Scale
LTC1596-1: Resets to Midscale
s _{3-Wire SPI and MICROWIRE}^TM _Compatible
Serial Interface
s _{Daisy-Chain Serial Output (LTC1596)}
s _{Asynchronous Clear Input}
LTC1596: Clears to Zero Scale
LTC1596-1: Clears to Midscale
U
APPLICATIONS
s _{Process Control and Industrial Automation}
s _{Software Controlled Gain Adjustment}
s _{Digitally Controlled Filter and Power Supplies}
s _{Automatic Test Equipment}
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 V_OS 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.
The DACs have a clear input and a power-on reset. The
LTC1595 and LTC1596 reset to zero scale. The LTC1596-1
is a version of the LTC1596 that resets to midscale.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
TYPICAL APPLICATION
SO-8 Multiplying 16-Bit DAC Has Easy 3-Wire Serial Interface
V_IN
CLOCK
DATA
LOAD
5V
8
12
7 ^{VDD VREF RFB}
CLK
6 _{SRI LTC1595 OUT1} 3
5 _LD
GND
4
33pF
–
LT^®1468
+
V_OUT
1595/96 TA01
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
– 0.8
–1.0
0
Integral Nonlinearity
16384 32768 49152
DIGITAL INPUT CODE
65535
1595/96 TA02
1