LTC1590 Datasheet, PDF (1/12 Pages) Linear Technology – Dual Serial 12-Bit Multiplying DAC

FEATURES
s _{DNL and INL Over Temperature: ±0.5LSB Max}
s _{Gain Error: ±1LSB Max}
s _{Low Supply Current: 10µA Max}
s _{4-Quadrant Multiplication}
s _{Power-On Reset}
s _{Asynchronous Clear Input}
s _{Daisy-Chain 3-Wire Serial Interface}
s _{16-Pin Narrow SO and PDIP Packages}
U
APPLICATIONS
s _{Process Control and Industrial Automation}
s _{Software Controlled Gain Adjustment}
s _{Digitally Controlled Filter and Power Supplies}
s _{Automatic Test Equipment}
LTC1590
Dual Serial 12-Bit
Multiplying DAC
DESCRIPTION
The LTC^®1590 is a dual, serial input 12-bit multiplying
digital-to-analog converter (DAC). It includes two current
output multiplying CMOS DACs and an easy SPI compat-
ible serial interface with daisy-chain output. An asynchro-
nous CLR pin sets both DACs to zero scale.
Excellent accuracy, stability and versatility are combined
with the smallest package available for a dual 12-bit
multiplying DAC.
Parts are available in 16-pin PDIP and narrow SO pack-
ages and are specified over the commercial and industrial
temperature ranges.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Dual 12-Bit 2-Quadrant Multiplying DAC
V_{IN A}
V_{IN B}
5V
±10V
±10V
16
9
12
15V
V_CC
Daisy-Chained Control Outputs
33pF
13 D_IN
LT^®1112
14 CLK
V_{REF B} R_{FB B}
OUT1 B 3
–
µP
11 CS/LD
24-BIT
SHIFT
REG
AND
LATCH
DAC B
V_{REF A} R_{FB A}
OUT2 B 4
+
8
OUT1 A ₆
33pF
–
DAC A
12 D_OUT
CLR DGND
15
10
5V
AGND
7
OUT2 A 5
LTC1590
+
–15V
Integral Nonlinearity Over
Temperature DAC A
1.0
THREE
SUPERIMPOSED
CURVES
0.5
T_A = –40°C,
25°C, 85°C
0
–0.5
V_{OUT B}
±10V
V_{OUT A}
±10V
LTC1590 • TA01
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE LTC1590 • TA02
Integral Nonlinearity Over
Temperature DAC B
1.0
THREE
SUPERIMPOSED
0.5
CURVES
T_A = –40°C,
25°C, 85°C
0
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE LTC1590 • TA03
1