ADS7871 datasheet(1/42 Pages) TI

部件名	ADS7871

功能描述	14-BIT, 48-KSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE

PDF	42 Pages

Scroll/Zoom	100%

制造商	TI [Texas Instruments]

网页	http://www.ti.com

标志

1 / 42 page

ADS7871

SLAS370C − APRIL 2002 − REVISED OCTOBER 2004

14BIT, 48KSPS, DATA ACQUISITION SYSTEM WITH ANALOGTODIGITAL

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.

14-BIT

A/D

MUX

Serial

Interface

SCLK

CS

Digital

I/O

I/O0

I/O2

I/O3

I/O1

LN0

LN2

LN3

LN1

LN4

LN6

LN7

LN5

Registers

PGA

_

+

RESET

RISE/FALL

DIN

DOUT

BUSY

CONVERT

BUFOUT/REFIN

BUFIN

Oscillator

CCLK

OSC ENABLE

REF

VREF

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.

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.

Copyright

 2002−2004, Texas Instruments Incorporated

All trademarks are the property of their respective owners.

类似零件编号 - ADS7871

制造商	部件名	数据表	功能描述
Texas Instruments	ADS7871	564Kb / 44P	14-BIT, 48-KSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE
	ADS7871	958Kb / 46P	PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
	ADS7871	640Kb / 48P	14-BIT, 48-KSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE REVISED OCTOBER 2004
	ADS7871IDB	564Kb / 44P	14-BIT, 48-KSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE
	ADS7871IDB	958Kb / 46P	PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V

More results

类似说明 - ADS7871

制造商	部件名	数据表	功能描述
Texas Instruments	THS1401	312Kb / 22P	14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS WITH INTERNAL REFERENCE AND PGA
Burr-Brown (TI)	ADS1250	196Kb / 20P	20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER
Burr-Brown (TI)	ADS7870	262Kb / 27P	12-Bit ADC, MUX, PGA and Internal Reference DATA ACQUISITION SYSTEM
Texas Instruments	THS1041	509Kb / 37P	10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP
	THS1401	585Kb / 26P	14-Bit, 1/3/8 MSPS, DSP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS WITH INTERNAL REFERENCE AND PGA
	THS1401-EP	646Kb / 27P	14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS WITH INTERNAL REFERENCE AND PGA
	ADS7870	494Kb / 43P	12-BIT, 52-kSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE
	ADS7871	564Kb / 44P	14-BIT, 48-KSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE
	THS1408-EP	493Kb / 28P	14-BIT, 3/8 MSPS DSP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PGA
	ADS7870	887Kb / 45P	12-BIT, 52-kSPS, DATA ACQUISITION SYSTEM WITH ANALOG-TO-DIGITAL CONVERTER, MUX, PGA, AND REFERENCE