LTC1655_15 Datasheet, PDF (1/16 Pages) Linear Technology – 16-Bit Rail-to-Rail Micropower DACs in SO-8 Package

FEATURES
s _{16-Bit Monotonicity Over Temperature}
s _{Deglitched Rail-to-Rail Voltage Output}
s _{SO-8 Package}
s _{ICC(TYP): 600µA}
s _{Internal Reference: 2.048V (LTC1655)}
1.25V (LTC1655L)
s _{Maximum DNL Error: ±1LSB}
s _{Settling Time: 20µS to ±1LSB}
s _{750kHz Max Update Rate}
s _{Power-On Reset to Zero Volts}
s _{3-Wire Cascadable Serial Interface}
s _{Low Cost}
s _{Pin Compatible Upgrade for LTC1451 12-Bit DAC}
Family
U
APPLICATIO S
s _{Digital Calibration}
s _{Industrial Process Control}
s _{Automatic Test Equipment}
s _{Cellular Telephones}
W
FU CTIO AL BLOCK DIAGRA
LTC1655/LTC1655L
16-Bit Rail-to-Rail
Micropower DACs in
SO-8 Package
DESCRIPTIO
The LTC^®1655/LTC1655L are rail-to-rail voltage output,
16-bit digital-to-analog converters in an SO-8 package.
They include an output buffer and a reference. The 3-wire
serial interface is compatible with SPI/QSPI and
MICROWIRE^TM protocols. The CLK input has a Schmitt
trigger that allows direct optocoupler interface.
The LTC1655 has an onboard 2.048V reference that can be
overdriven to a higher voltage. The output swings from 0V
to 4.096V when using the internal reference. The typical
power dissipation is 3.0mW on a single 5V supply.
The LTC1655L has an onboard 1.25V reference that can be
overdriven to a higher voltage. The output swings from 0V
to 2.5V when using the internal reference. The typical
power dissipation is 1.8mW on a single 3V supply.
The LTC1655/LTC1655L are pin compatible with Linear
Technology’s 12-bit V_OUT DAC family, allowing an easy
upgrade path. They are the only buffered 16-bit DACs in
an SO-8 package and they include an onboard reference
for standalone performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
Functional Block Diagram: 16-Bit Rail-to-Rail DAC
LTC1655: 4.5V TO 5.5V
LTC1655L: 2.7V TO 5.5V
8
LTC1655: 2.048V
LTC1655L: 1.25V
6
V_CC
2 D_IN
REF
REF
1 CLK
16-BIT 16
µP
SHIFT
3 CS/LD REG
AND
16-BIT
DAC
+
DAC
LATCH
–
4 D_OUT
V_{OUT 7}
POWER-ON
TO
RESET
OTHER
GND
DACS
5
1655/55L TA01
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
– 1.0
0
Differential Nonlinearity
vs Input Code
16384
32768
CODE
49152 65535
1655/55L TA02
1