1654 Просмотр технического описания (PDF) - Linear Technology
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1654 Datasheet PDF : 16 Pages
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FEATURES
■ 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
U
APPLICATIO S
■ Digital Calibration
■ Industrial Process Control
■ Automatic Test Equipment
■ Offset/Gain Adjustment
■ Multiplying DAC
LTC1654
Dual 14-Bit Rail-to-Rail DAC
in 16-Lead SSOP Package
DESCRIPTIO
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 VCC. The output will swing from 0V to VCC in
a gain of 1 configuration or VCC/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.
BLOCK DIAGRA
CS/LD
SCK
CONTROL
LOGIC
SDI
INPUT
LATCH
DAC
REGISTER
DAC B
+
–
32-BIT
SHIFT
REGISTER
REFHI B
VOUT B
X1/X1/2 B
REFHI A
INPUT
LATCH
DAC
REGISTER
DAC A
+
VOUT A
SDO
–
CLR
POWER-ON
RESET
REFLO B
REFLO A
X1/X1/2 A
1654 BD
1654fb
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