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LTC2634CUD-HMX12PBF

Description
Quad 12-/10-/8-Bit Rail-to-Rail DACs with 10ppm/∑C Reference
File Size381KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC2634CUD-HMX12PBF Overview

Quad 12-/10-/8-Bit Rail-to-Rail DACs with 10ppm/∑C Reference

LTC2634
Quad 12-/10-/8-Bit
Rail-to-Rail DACs with
10ppm/°C Reference
FEATURES
n
DESCRIPTION
The LTC
®
2634 is a family of quad 12-, 10- and 8-bit volt-
age output DACs with an integrated, high accuracy, low
drift 10ppm/°C reference in 16-lead QFN and 10-lead
MSOP packages. It has rail-to-rail output buffers and is
guaranteed monotonic. The LTC2634-L has a full-scale
output of 2.5V, and operates from a single 2.7V to 5.5V
supply. The LTC2634-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 an SPI/MICROWIRE compat-
ible 3-wire serial interface which operates at clock rates
up to 50MHz. Serial data output (SDO), a hardware clear
(CLR), and an asynchronous DAC update (LDAC) capability
are available in the QFN package. The LTC2634 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 and LTM 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.
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Integrated Precision Reference
2.5V Full-Scale 10ppm/°C (LTC2634-L)
4.096V Full-Scale 10ppm/°C (LTC2634-H)
Maximum INL Error: ±2.5 LSB (LTC2634-12)
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 (LTC2634-L)
Ultralow Crosstalk Between DACs (2.4nV•s)
Low Power: 0.6mA at 3V
Power-On Reset to Zero-Scale/Mid-Scale
Double Buffered Data Latches
Tiny 16-Lead 3mm
×
3mm QFN and 10-Lead
MSOP Packages
APPLICATIONS
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Mobile Communications
Process Control and Industrial Automation
Automatic Test Equipment
Portable Equipment
Automotive
BLOCK DIAGRAM
GND
INTERNAL
REFERENCE
SWITCH
V
REF
(REFLO)
REGISTER
REGISTER
REGISTER
REGISTER
V
OUTA
V
CC
2
DAC D
V
OUTD
1
V
REF
REGISTER
REGISTER
REGISTER
REGISTER
DAC B
DAC C
V
OUTC
INL (LSB)
V
CC
= 3V
INTERNAL REF
REF
Integral Nonlinearity
(LTC2634-LZ12)
DAC A
V
REF
V
OUTB
0
CS/LD
CONTROL
LOGIC
DECODE
SDI
SDI
–1
–2
SCK
(LDAC)
( ) QFN PACKAGE ONLY
32-BIT SHIFT REGISTER
POWER-ON
RESET
(CLR)
(SDO)
2634 BD
0
1024
2048
CODE
3072
4095
2634 TA01
2634f
1
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