LTC2631_15 Datasheet, PDF (1/28 Pages) Linear Technology – Single 12-/10-/8-Bit I2C VOUT DACs with 10ppm/C Reference

Features
n _{Integrated Precision Reference}
2.5V Full-Scale 10ppm/°C (LTC2631-L)
4.096V Full-Scale 10ppm/°C (LTC2631-H)
n _{Maximum INL Error: 1LSB (LTC2631A-12)}
n _{Bidirectional Reference: Input or 10ppm/°C Output}
n _{400kHz I}²_{C™ Interface}
n _{Nine Selectable Addresses (LTC2631-Z)}
n _{Low Noise (0.7mVP-P , 0.1Hz to 200kHz)}
n _{Guaranteed Monotonic Over Temperature}
n _{2.7V to 5.5V Supply Range (LTC2631-L)}
n _{Low Power Operation: 180µA at 3V}
n _{Power Down to 1.8µA Maximum (C and I Grades)}
n _{Power-On Reset to Zero or Mid-Scale Options}
n _{Double-Buffered Data Latches}
n _{Guaranteed Operation From –40°C to 125°C (H-Grade)}
n _{8-Lead TSOT-23 (ThinSOT™) Package}
Applications
n _{Mobile Communications}
n _{Process Control and Industrial Automation}
n _{Automatic Test Equipment}
n _{Portable Equipment}
n _Automotive
n _{Optical Networking}
LTC2631
Single 12-/10-/8-Bit I²C
V_OUT DACs with
10ppm/°C Reference
Description
The LTC^®2631 is a family of 12-, 10-, and 8-bit voltage-
output DACs with an integrated, high accuracy, low-drift
reference in an 8-lead TSOT-23 package. It has a rail-to-rail
output buffer that is guaranteed monotonic.
The LTC2631-L has a full-scale output of 2.5V, and oper-
ates from a single 2.7V to 5.5V supply. The LTC2631-H
has a full-scale output of 4.096V, and operates from a 4.5V
to 5.5V supply. A 10ppm/°C reference output is available
at the REF pin.
Each DAC can also operate in External Reference mode,
in which a voltage supplied to the REF pin sets the full-
scale output.
The LTC2631 DACs use a 2-wire, I²C-compatible serial
interface. The LTC2631 operates in both the standard
mode (clock rate of 100kHz) and the fast mode (clock
rate of 400kHz).
The LTC2631 incorporates a power-on reset circuit.
Op-tions are available for reset to zero-scale or reset to
mid-scale after power-up.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and I²C
and ThinSOT are 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 and 7414561.
Block Diagram (LTC2631-M)
V_CC
CA0
I²C
ADDRESS
DECODE
INTERNAL
REFERENCE
CONTROL
DECODE LOGIC
SCL
I²C
INTERFACE
SDA
INPUT
DAC
REGISTER
REGISTER
REF
SWITCH
REF_SEL
RESISTOR
DIVIDER
DACREF
DAC
V_OUT
GND
2631 TA01
For more information www.linear.com/LTC2631
Integral Nonlinearity (LTC2631A-LM12)
1.0 _{VCC = 3V}
V_FS = 2.5V
0.5
0
–0.5
–1.0
0
1024
2048
CODE
3072
4095
2631 TA01b
2631fc
1