LTC2654
Quad 16-/12-Bit Rail-to-Rail
DACs with 10ppm/°C
Max Reference
FEATURES
DESCRIPTION
The LTC®2654 is a family of quad 16-/12-bit rail-to-rail
DACswithintegrated10ppm/°Cmaximumreference. The
DACs have built-in high performance, rail-to-rail, output
buffers and are guaranteed monotonic. The LTC2654-L
has a full-scale output of 2.5V with the integrated refer-
ence and operates from a single 2.7V to 5.5V supply.
The LTC2654-H has a full-scale output of 4.096V with
the integrated reference and operates from a 4.5V to
5.5V supply. Each DAC can also operate with an external
reference, which sets the full-scale output to 2 times the
external reference voltage.
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Precision Reference 10ppm/°C Max
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Maximum INL Error: ±±LꢀS aꢁ 1ꢂ6Siꢁs
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Low ±ꢃmꢄ ꢅMaxꢆ ꢇffseꢁ Error
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Guaranteed Monotonic Over Temperature
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Selectable Internal or External Reference
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2.7V to 5.5V Supply Range (LTC2654-L)
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Integrated Reference Buffers
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Ultralow Crosstalk Between DACs (<3nV•s)
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Power-on-Reset to Zero-Scale/Mid-Scale
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Asynchronous DAC Update Pin
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Tiny 20-Lead 4mm × 4mm QFN and 16-Lead Narrow
SSOP Packages
These DACs communicate via a SPI/MICROWIRE™ com-
patible4-wireserialinterfacewhichoperatesatclockrates
up to 50MHz. The LTC2654 incorporates a power-on reset
circuit that is controlled by the PORSEL pin. If PORSEL
is tied to GND the DACs reset to zero-scale. If PORSEL is
APPLICATIONS
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Mobile Communications
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Process Control and Industrial Automation
tied to V , the DACs reset to mid-scale.
CC
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Instrumentation
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. SPI/MICROWIRE is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5396245, 6891433 and patent pending.
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Automatic Test Equipment
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Automotive
BLOCK DIAGRAM
REFIN/OUT
REFCOMP
INTERNAL REFERENCE
INL Curve
GND
V
CC
4
3
V
= 5V
CC
REFLO
V
V
OUTA
OUTD
DAC A
DAC B
DAC D
DAC C
2
1
0
V
V
OUTC
–1
–2
–3
–4
OUTB
CS/LD
PORSEL
SDO
POWER-ON
RESET
CONTROL LOGIC
DECODE
128
16384
32768
CODE
49152
65535
SCK
2654 TA01b
SDI
32-BIT SHIFT REGISTER
LDAC
CLR
2654 TA01a
2654f
1