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LTC1272-8ACSW#PBF

Description
Analog-to-digital converter - ADC 12-bit 110ksps SAR ADC (8us Conversion Time)
CategoryAnalog mixed-signal IC    converter   
File Size285KB,22 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LTC1272-8ACSW#PBF Overview

Analog-to-digital converter - ADC 12-bit 110ksps SAR ADC (8us Conversion Time)

LTC1272-8ACSW#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionSOP,
Contacts24
Manufacturer packaging code05-08-1620 (SW24)
Reach Compliance Codecompliant
Maximum analog input voltage15 V
Minimum analog input voltage-0.3 V
Maximum conversion time8000 µs
Converter typeADC, SUCCESSIVE APPROXIMATION
JESD-30 codeR-PDSO-G24
JESD-609 codee3
length15.395 mm
Maximum linear error (EL)0.0122%
Humidity sensitivity level1
Number of analog input channels1
Number of digits12
Number of functions1
Number of terminals24
Maximum operating temperature70 °C
Minimum operating temperature
Output bit codeBINARY
Output formatPARALLEL, WORD
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Sampling rate0.25 MHz
Sample and hold/Track and holdSAMPLE
Maximum seat height2.642 mm
Nominal supply voltage5 V
surface mountYES
technologyBICMOS
Temperature levelCOMMERCIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width7.493 mm
LTC1272
12-Bit, 3µs, 250kHz
Sampling A/D Converter
FEATURES
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DESCRIPTION
The
LTC1272
is a 3µs, 12-bit, successive approximation
sampling A/D converter. It has the same pinout as the
industry standard AD7572 and offers faster conversion
time, on-chip sample-and-hold, and single supply opera-
tion. It uses LTBiCMOS™ switched-capacitor technology
to combine a high speed 12-bit ADC with a fast, accurate
sample-and-hold and a precision reference.
The LTC1272 operates with a single 5V supply but can
also accept the 5V/–15V supplies required by the AD7572
(Pin 23, the negative supply pin of the AD7572, is not con-
nected on the LTC1272). The LTC1272 has the same 0V to
5V input range as the AD7572 but, to achieve single supply
operation, it provides a 2.42V reference output instead of
the – 5.25V of the AD7572. It plugs in for the AD7572 if the
reference capacitor polarity is reversed and a 1µs sample-
and-hold acquisition time is allowed between conversions.
The output data can be read as a 12-bit word or as two
8-bit bytes. This allows easy interface to both 8-bit and
higher processors. The LTC1272 can be used with a crystal
or an external clock and comes in speed grades of 3ms
and 8ms.
AD7572 Pinout
12-Bit Resolution
3µs and 8µs Conversion Times
On-Chip Sample-and-Hold
Up to 250kHz Sample Rates
5V Single Supply Operation
No Negative Supply Required
On-Chip 25ppm/°C Reference
75mW (Typ) Power Consumption
ESD Protected on All Pins
24-Pin Narrow DIP and SOL Packages
APPLICATIONS
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High Speed Data Acquisition
Digital Signal Processing (DSP)
Multiplexed Data Acquisition Systems
Single Supply Systems
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTBiCMOS is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
Single 5V Supply, 3µs, 12-Bit Sampling ADC
LTC1272
2.42V
V
REF
OUTPUT
ANALOG INPUT
(0V TO 5V)
0.1µF
A
IN
V
REF
10µF
AGND
D11 (MSB)
D10
D9
D8
D7
8 OR 12-BIT
PARALLEL
BUS
D6
D5
D4
DGND
V
DD
NC
BUSY
CS
RD
HBEN
CLK OUT
CLK IN
D0/8
D1/9
D2/10
D3/11
LTC1272 • F01
1024 Point FFT, f
S
= 250kHz, f
IN
= 10kHz
5V
0
–20
0.1µF
AMPLITUDE (dB)
–40
–60
–80
–100
–120
–140
0
20
40
60
80
100
120
LTC1272 • F02
+
10µF
+
S = 72.1
(N+D)
µP
CONTROL
LINES
FREQUENCY (kHz)
1272fc
For more information
www.linear.com/1272
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