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LTC1291_1

Description
2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8
Categorysemiconductor    logic   
File Size328KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1291_1 Overview

2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8

LTC1291_1 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals8
Maximum operating temperature70 Cel
Minimum operating temperature0.0 Cel
Rated supply voltage5 V
Maximum conversion time12 uS
Maximum linear error0.0122 %
Maximum limit analog input voltage5.05 V
Minimum limit analog input voltage-0.0500 V
Processing package description0.300 INCH, PLASTIC, DIP-8
stateACTIVE
CraftsmanshipCMOS
packaging shapeRECTANGULAR
Package SizeIN-LINE
Terminal formTHROUGH-HOLE
Terminal spacing2.54 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelCOMMERCIAL
Output formatSERIAL
Type of converterSUCCESSIVE APPROXIMATION
Number of digits12
Output bit encodingBINARY
Number of analog channels2
Sample and hold and track and holdSAMPLE
LTC1291
Single Chip 12-Bit
Data Acquisition System
FEATURES
s
s
s
s
DESCRIPTIO
s
s
s
Built-In Sample-and-Hold
Single Supply 5V Operation
Power Shutdown
Direct 3- or 4-Wire Interface to Most MPU Serial
Ports and All MPU Parallel Ports
Two-Channel Analog Multiplexer
Analog Inputs Common Mode to Supply Rails
8-Pin DIP Package
KEY SPECIFICATIO S
s
s
s
The LTC
®
1291 is a data acquisition system that contains
a serial I/O successive approximation A/D converter. It
uses LTCMOS
TM
switched capacitor technology to per-
form a 12-bit unipolar A/D conversion. The input multi-
plexer can be configured for either single-ended or differ-
ential inputs. An on-chip sample-and-hold is included on
the “+” input. When the LTC1291 is idle, it can be powered
down in applications where low power consumption is
desired. An external reference is not required because the
LTC1291 takes its reference from the power supply (V
CC
).
All these features are packaged in an 8-pin DIP.
The serial I/O is designed to communicate without external
hardware to most MPU serial ports and all MPU parallel
I/O ports allowing data to be transmitted over three or four
wires. Given the accuracy, ease of use and small package
size, this device is well suited for digitizing analog signals
in remote applications where minimum number of inter-
connects, small physical size, and low power consump-
tion are important.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS
TM
is a trademark of Linear Technology Corporation
Resolution: 12 Bits
Fast Conversion Time: 12µs Max Over Temp.
Low Supply Current:
6.0mA (Typ) Active Mode
10µA (Max) Shutdown Mode
TYPICAL APPLICATIO
2-Channel 12-Bit Data Acquisition System
22µF
TANTALUM
5V
0.5
0.4
0.3
CS
CH0
2-CHANNEL
MUX*
CH1
GND
V
CC
(V
REF
)
0.1µF
CLK
LTC1291
D
OUT
D
IN
DO
DELTA (LSB)
SCK
MC68HC11
MISO
MOSI
1291 TA01
*FOR OVERVOLTAGE PROTECTION, LIMIT THE INPUT CURRENT TO 15mA
PER PIN OR CLAMP THE INPUTS TO V
CC
AND GND WITH 1N4148 DIODES.
CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR
THE OTHER CHANNEL IS OVERVOLTAGED (V
IN
< GND OR V
IN
> V
CC
). SEE
SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION.
U
Channel-to-Channel
INL Matching
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
1291 TA02
U
U
+
1291fa
1

LTC1291_1 Related Products

LTC1291_1 LTC1291BCN8 LTC1291CCN8 LTC1291DCN8
Description 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8
Number of functions 1 1 1 1
Number of terminals 8 8 8 8
Maximum operating temperature 70 Cel 70 °C 70 °C 70 °C
Maximum conversion time 12 uS 12 µs 12 µs 12 µs
Terminal form THROUGH-HOLE THROUGH-HOLE THROUGH-HOLE THROUGH-HOLE
Terminal location DUAL DUAL DUAL DUAL
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Output format SERIAL SERIAL SERIAL SERIAL
Number of digits 12 12 12 12
Brand Name - Linear Technology Linear Technology Linear Technology
Is it Rohs certified? - incompatible incompatible incompatible
Maker - Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code - DIP DIP DIP
package instruction - DIP, DIP8,.3 DIP, DIP8,.3 DIP, DIP8,.3
Contacts - 8 8 8
Manufacturer packaging code - N N N
Reach Compliance Code - _compli _compli _compli
ECCN code - EAR99 EAR99 EAR99
Maximum analog input voltage - 5.05 V 5.05 V 5.05 V
Minimum analog input voltage - -0.05 V -0.05 V -0.05 V
Converter type - ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION
JESD-30 code - R-PDIP-T8 R-PDIP-T8 R-PDIP-T8
JESD-609 code - e0 e0 e0
Maximum linear error (EL) - 0.0122% 0.0122% 0.0183%
Humidity sensitivity level - 1 1 1
Number of analog input channels - 2 2 2
Output bit code - BINARY BINARY BINARY
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - DIP DIP DIP
Encapsulate equivalent code - DIP8,.3 DIP8,.3 DIP8,.3
Package shape - RECTANGULAR RECTANGULAR RECTANGULAR
Package form - IN-LINE IN-LINE IN-LINE
Peak Reflow Temperature (Celsius) - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
power supply - 5 V 5 V 5 V
Certification status - Not Qualified Not Qualified Not Qualified
Sample and hold/Track and hold - SAMPLE SAMPLE SAMPLE
Maximum seat height - 3.937 mm 3.937 mm 3.937 mm
Nominal supply voltage - 5 V 5 V 5 V
surface mount - NO NO NO
technology - CMOS CMOS CMOS
Terminal surface - Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal pitch - 2.54 mm 2.54 mm 2.54 mm
Maximum time at peak reflow temperature - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width - 7.62 mm 7.62 mm 7.62 mm
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