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LTC2637

Description
Mobile Communications
File Size570KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC2637 Overview

Mobile Communications

Features
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LTC2633
Dual 12-/10-/8-Bit I
2
C
V
OUT
DACs with
10ppm/°C Reference
Description
The LTC
®
2633 is a family of dual 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
rail-to-rail output buffers and is guaranteed monotonic.
The LTC2633-L has a full-scale output of 2.5V, and operates
from a single 2.7V to 5.5V supply. The LTC2633-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 full-scale output to the external
reference voltage.
These DACs communicate via a 2-wire I
2
C-compatible
serial interface. The LTC2633 operates in both the standard
mode (clock rate of 100kHz) and the fast mode (clock rate
of 400kHz). The LTC2633 incorporates a power-on reset
circuit. Options are available for reset to zero-scale, reset
to mid-scale in internal reference mode, reset to mid-scale
in external reference mode, or reset with all DAC outputs
in a high impedance state after power-up.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark 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.
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Integrated Precision Reference
2.5V Full-Scale 10ppm/°C (LTC2633-L)
4.096V Full-Scale 10ppm/°C (LTC2633-H)
Maximum INL Error: ±1LSB (LTC2633A-12)
Low Noise: 0.75mV
P-P
0.1Hz to 200kHz
Guaranteed Monotonic Over –40°C to 125°C
Temperature Range
Selectable Internal or External Reference
2.7V to 5.5V Supply Range (LTC2633-L)
Low Power: 0.4mA at 3V
Power-on-Reset to Zero-Scale/Mid-Scale/Hi-Z
Double-Buffered Data Latches
8-Lead ThinSOT™ Package
applications
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Mobile Communications
Process Control and Industrial Automation
Power Supply Margining
Portable Equipment
Automotive
Block Diagram
GND
INTERNAL
REFERENCE
SWITCH
V
REF
V
CC
REF
Integral Nonlinearity (LTC2633A-LZ12)
INL Curve
2
V
CC
= 3V
INTERNAL REF
.
REGISTER
REGISTER
REGISTER
V
OUTA
REGISTER
DAC A
DAC B
V
OUTB
INL (LSB)
SCL
1
0
POWER-ON
RESET
CONTROL
DECODE LOGIC
–1
CA0
I
2
C
ADDRESS
DECODE
–2
I
2
C INTERFACE
SDA
0
1024
2048
CODE
3072
4095
2633 TA01
2633 BD
2633fb
1

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