LTC2637 Datasheet, PDF (1/28 Pages) Linear Technology – Mobile Communications

LTC2637
Octal 12-/10-/8-Bit I²C V_OUT
DACs with 10ppm/°C Reference
Features
n _{Integrated Precision Reference:}
2.5V Full-Scale 10ppm/°C (LTC2637-L)
4.096V Full-Scale 10ppm/°C (LTC2637-H)
n _{Maximum INL Error: 2.5LSB (LTC2637-12)}
n _{Low Noise: 0.75mVP-P 0.1Hz to 200KHz}
n _{Guaranteed Monotonic Over –40°C to 125°C}
Temperature Range
n _{Selectable Internal or External Reference}
n _{2.7V to 5.5V Supply Range (LTC2637-L)}
n _{Ultralow Crosstalk Between DACs (<3nV•s)}
n _{Low Power: 100µA per DAC at 3V (LTC2637-L)}
n _{Power-On-Reset to Zero-Scale/Mid-Scale}
n _{Double-Buffered Data Latches}
n _{Tiny 14-Lead 4mm × 3mm DFN and 16-Lead MSOP}
Packages
Applications
n _{Mobile Communications}
n _{Process Control and Industrial Automation}
n _{Automatic Test Equipment}
n _{Portable Equipment}
n _Automotive
n _{Optical Networking}
Description
The LTC^®2637 is a family of octal 12-, 10-, and 8-bit
voltage-output DACs with an integrated, high-accuracy,
low-drift 10ppm/°C reference in 14-lead DFN and 16-lead
MSOP packages. It has a rail-to-rail output buffer and is
guaranteed monotonic. The LTC2637-L has a full-scale
output of 2.5V, and operates from a single 2.7V to 5.5V
supply. The LTC2637-H has a full-scale output of 4.096V,
and operates from a 4.5V to 5.5V supply. Each DAC can
also operate with an external reference, which sets the DAC
full-scale output to the external reference voltage.
These DACs communicate via a 2-wire I²C-compatible
serial interface. The LTC2637 operates in both the standard
mode (clock rate of 100kHz) and the fast mode (clock rate
of 400kHz). The LTC2637 incorporates a power-on reset
circuit. Options are available for reset to zero-scale or
reset to mid-scale in internal reference mode, or reset to
mid-scale in external reference mode after power-up.
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, 5859606, 6891433, 6937178, 7414561.
Block Diagram
INTERNAL REFERENCE
GND
V_OUTA
V_REF
V_OUTB
V_REF
V_OUTC
V_REF
V_OUTD
DAC A
DAC B
DAC C
DAC D
CAO
(CA1)
(CA2)
I²C
ADDRESS
DECODE
DECODE
I²C INTERFACE
( ) MSOP PACKAGE ONLY
SWITCH
REF
V_REF
V_CC
DAC H
V_OUTH
V_REF
DAC G
V_OUTG
V_REF
DAC F
V_REF
V_OUTF
DAC E
V_OUTE
POWER-ON RESET
SCL
SDA
2637 BD
Integral Nonlinearity (LTC2637-LZ12)
2
V_CC = 3V
INTERNAL REF.
1
0
–1
–2
0
1024
2048
CODE
3072
4095
2637 TA01
2637fa