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LTC1852CFW-PBF

Description
8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs
File Size240KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC1852CFW-PBF Overview

8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs

LTC1852/LTC1853
8-Channel, 10-Bit/12-Bit,
400ksps, Low Power, Sampling ADCs
FEATURES
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DESCRIPTION
The 10-bit LTC
®
1852 and 12-bit LTC1853 are complete
8-channel data acquisition systems. They include a flexible
8-channel multiplexer, a 400ksps successive approxima-
tion analog-to-digital converter, an internal reference and a
parallel output interface. The multiplexer can be configured
for single-ended or differential inputs, two gain ranges and
unipolar or bipolar operation. The ADCs have a scan mode
that will repeatedly cycle through all 8 multiplexer channels
and can also be programmed to sequence through up to
16 addresses and configurations. The sequence can also
be read back from internal memory.
The reference and buffer amplifier provide pin strappable
ranges of 4.096V, 2.5V and 2.048V. The parallel output
includes the 10-bit or 12-bit conversion result plus the
4-bit multiplexer address. The digital outputs are pow-
ered from a separate supply allowing for easy interface
to 3V digital logic. Typical power consumption is 10mW
at 400ksps from a single 5V supply and 3mW at 250ksps
from a single 3V supply.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
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Flexible 8-Channel Multiplexer
Single-Ended or Differential Inputs
Two Gain Ranges
Unipolar or Bipolar Operation
Scan Mode and Programmable Sequencer
Eliminate Configuration Software Overhead
Low Power: 3mW at 250ksps
2.7V to 5.5V Supply Range
Internal or External Reference Operation
Parallel Output Includes MUX Address
Nap and Sleep Shutdown Modes
Pin Compatible up-grade 1.25Msps 10-Bit LTC1850
and 12-Bit LTC1851
APPLICATIONS
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High Speed Data Acquisition
Test and Measurement
Imaging Systems
Telecommunications
Industrial Process Control
Spectrum Analysis
BLOCK DIAGRAM
LTC1853
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
2.5V
REFERENCE
8-CHANNEL
MULTIPLEXER
INTERNAL
CLOCK
CONTROL LOGIC
AND
PROGRAMMABLE
SEQUENCER
M1
SHDN
CS
CONVST
RD
WR
DIFF
A2
A1
A0
UNI/BIP
PGA
M0
OV
DD
BUSY
DIFF
OUT
/S6
A2
OUT
/S5
A1
OUT
/S4
A0
OUT
/S3
D11/S2
D10/S1
D9/S0
D8
D7
D6
D5
D4
D3
D2
D1
D0
OGND
18523 BD
Integral Linearity
1.0
0.5
INL ERROR (LSBs)
0
–0.5
REFOUT
+
12-BIT
SAMPLING
ADC
DATA
LATCHES
OUTPUT
DRIVERS
–1.0
0
REFIN
REF AMP
512 1024 1536 2048 2560 3072 3584 4096
CODE
1852 F01
REFCOMP
18523fa
1

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