LTC2655 Datasheet, PDF (1/28 Pages) Linear Technology – Quad I²C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference

FEATURES
n _{Integrated Reference 10ppm/°C Max}
n _{Maximum INL Error: ±4LSB at 16 Bits}
n _{Guaranteed Monotonic Over Temperature}
n _{Selectable Internal or External Reference}
n _{2.7V to 5.5V Supply Range (LTC2655-L)}
n _{Integrated Reference Buffers}
n _{Ultralow Crosstalk Between DACs (<1nV•s)}
n _{Power-On-Reset to Zero-Scale/Mid-Scale}
n _{Asynchronous DAC Update Pin}
n _{Tiny 20-Lead 4mm × 4mm QFN and}
16-Lead Narrow SSOP packages
APPLICATIONS
n _{Mobile Communications}
n _{Process Control and Industrial Automation}
n _{Instrumentation}
n _{Automatic Test Equipment}
n _Automotive
BLOCK DIAGRAM
REFCOMP
GND
REFLO
V_OUTA
DAC A
INTERNAL REFERENCE
V_OUTB
CA0
CA1
CA2
SCL
LDAC
DAC B
32-BIT SHIFT REGISTER
2-WIRE INTERFACE
LTC2655
Quad I²C 16-/12-Bit
Rail-to-Rail DACs with
10ppm/°C Max Reference
DESCRIPTION
The LTC^®2655 is a family of Quad I²C 16-/12-Bit Rail-to-
Rail DACs with integrated 10ppm/°C max reference. The
DACs have built-in high performance, rail-to-rail, output
buffers and are guaranteed monotonic. The LTC2655-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 LTC2655-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.
The parts use the 2-wire I²C compatible serial interface.
The LTC2655 operates in both the standard mode (maxi-
mum clock rate of 100kHz) and the fast mode (maximum
clock rate of 400kHz). The LTC2655 incorporates a
power-on reset circuit that is controlled by the PORSEL
pin. If PORSEL is tied to GND the DACs power-on reset to
zero-scale. If PORSEL is tied to V_CC, the DACs power-on
reset to mid-scale.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5396245, 6891433 and 7671770.
REFIN/OUT
V_CC
DAC D
V_OUTD
DAC C
V_OUTC
POWER-ON PORSEL
RESET
SDA
2655 BD
4
V_CC = 5V
3
INL Curve
2
1
0
–1
–2
–3
–4
128
16384
32768
CODE
49152 65535
2655 TA01b
2655f
1