LTC1654
Dual 14-Bit Rail-to-Rail DAC
in 16-Lead SSOP Package
FEATURES
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DESCRIPTIO
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14-Bit Monotonic Over Temperature
Individually Programmable Speed/Power:
3µs Settling Time at 930µA
8.5µs Settling Time at 540µA
3V to 5V Single Supply Operation
Maximum Update Rate: 0.9MHz
Buffered True Rail-to-Rail Voltage Outputs
User Selectable Gain
Power-On Reset and Clear Function
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Smallest Dual 14-Bit DAC: 16-Lead Narrow
SSOP Package
The LTC
®
1654 is a dual, rail-to-rail voltage output, 14-bit
digital-to-analog converter (DAC). It is available in a
16-lead narrow SSOP package, making it the smallest dual
14-bit DAC available. It includes output buffer amplifiers
and a flexible serial interface.
The LTC1654 has REFHI pins for each DAC that can be
driven up to V
CC
. The output will swing from 0V to V
CC
in
a gain of 1 configuration or V
CC
/2 in a gain of 1/2 configu-
ration. It operates from a single 2.7V to 5.5V supply.
The LTC1654 has two programmable speeds: a FAST and
SLOW mode with
±1LSB
settling times of 3µs or 8.5µs
respectively and supply currents of 930µA and 540µA in
the two modes. The LTC1654 also has shutdown capabil-
ity, power-on reset and a clear function to 0V.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5396245.
APPLICATIO S
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Digital Calibration
Industrial Process Control
Automatic Test Equipment
Offset/Gain Adjustment
Multiplying DAC
BLOCK DIAGRA
CS/LD
SCK
CONTROL
LOGIC
SDI
INPUT
LATCH
DAC
REGISTER
DAC B
+
V
OUT B
–
32-BIT
SHIFT
REGISTER
X
1
/X
1/2
B
REFHI A
INPUT
LATCH
DAC
REGISTER
DAC A
+
V
OUT A
SDO
POWER-ON
RESET
REFLO B
REFLO A
–
X
1
/X
1/2
A
1654 BD
CLR
U
REFHI B
1654fb
W
U
1
LINER [ LINEAR TECHNOLOGY ]
