DATA ACQUISITION. ADS7871 Datasheet

ADS7871 ACQUISITION. Datasheet pdf. Equivalent

Part ADS7871
Description DATA ACQUISITION
Feature ADS7871 SLAS370C − APRIL 2002 − REVISED OCTOBER 2004 14ĆBIT, 48ĆKSPS, DATA ACQUISITION SYSTEM WITH .
Manufacture Burr-Brown
Datasheet
Download ADS7871 Datasheet

ADS7871 SLAS370C − APRIL 2002 − REVISED OCTOBER 2004 14ĆBIT ADS7871 Datasheet
Recommendation Recommendation Datasheet ADS7871 Datasheet





ADS7871
ADS7871
SLAS370C − APRIL 2002 − REVISED OCTOBER 2004
14ĆBIT, 48ĆKSPS, DATA ACQUISITION SYSTEM WITH ANALOGĆTOĆDIGITAL
CONVERTER, MUX, PGA, AND REFERENCE
FEATURES
D PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
D Programmable Input (Up to 4-Channel
Differential/Up to 8-Channel Single-Ended or
Some Combination)
D 1.15-V, 2.048-V, or 2.5-V Internal Reference
D SPI/DSP Compatible Serial Interface
(20 MHz)
D Throughput Rate: 48 kSamples/sec
D Error Overload Indicator
D Programmable Output 2s Complement/Binary
D 2.7-V to 5.5-V Single Supply Operation
D 4-Bit Digital I/O Via Serial Interface
D Pin-Compatible With ADS7870
D SSOP-28 Package
APPLICATIONS
D Portable Battery-Powered Systems
D Low-Power Instrumentation
D Low-Power Control Systems
D Smart Sensor Applications
DESCRIPTION
The ADS7871 (US patents 6140872, 6060874) is a
complete low power data acquisition system on a single
chip. It consists of a 4-channel differential/8-channel
single-ended multiplexer, precision programmable gain
amplifier, 14-bit successive approximation analog-to-
digital (A/D) converter, and a precision voltage reference.
The programmable-gain amplifier provides high input
impedance, excellent gain accuracy, good common-mode
rejection, and low noise.
For many low-level signals, no external amplification or
impedance buffering is needed between the signal source
and the A/D input.
The offset voltage of the PGA is auto-zeroed. Gains of 1,
2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125
mV to produce full-scale digital outputs.
The ADS7871 contains an internal reference, which is
trimmed for high initial accuracy and stability vs
temperature. Drift is typically 10 ppm/°C. An external
reference can be used in situations where multiple
ADS7871s share a common reference.
The serial interface allows the use of SPI, QSPI,
Microwire, and 8051-family protocols, without glue logic.
VREF
LN0
LN1
LN2
LN3
LN4
LN5
LN6
LN7
MUX
I/O0
I/O1
Digital
I/O2
I/O
I/O3
REF
BUFIN
BUFOUT/REFIN
Oscillator
+
_PGA
14-BIT
A/D
Registers
Serial
Interface
CCLK
OSC ENABLE
BUSY
CONVERT
RESET
RISE/FALL
CS
SCLK
DIN
DOUT
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2002−2004, Texas Instruments Incorporated



ADS7871
ADS7871
SLAS370C − APRIL 2002 − REVISED OCTOBER 2004
www.ti.com
ORDERING INFORMATION(1)
PRODUCT
PACKAGE-LEAD
PACKAGE
DESIGNATOR
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT MEDIA,
QUANTITY
ADS7871
SSOP-28 Surface Mount
DB
−40°C to +85°C
ADS7871
ADS7871
ADS7871IDB
ADS7871IDBR
Rails, 48
Tape and Reel, 1000
(1) For the most current package and ordering information, see the package option addendum located at the end of this data sheet.
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to
damage because very small parametric changes could cause the device not to meet its published specifications.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
Supply voltage, VDD
Analog inputs
Input current
Input voltage
Operating free-air temperature range, TA
Storage temperature range, TSTG
Junction temperature (TJ max)
Lead temperature, (10 sec)
Momentary
Continuous
UNIT
5.5 V
100 mA
10 mA
VDD + 0.5 V to GND − 0.5 V
−40°C to 85°C
−65°C to 150°C
150°C
300°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
2





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