ADS8699IPWR datasheet(1/74 Pages) TI2

部件名	ADS8699IPWR

功能描述	ADS869x 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges

PDF	74 Pages

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制造商	TI2 [Texas Instruments]

网页	https://www.ti.com

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ADS869x 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System

With Programmable, Bipolar Input Ranges

1 Features

• 18-bit ADC with integrated analog front-end

• High speed:

– ADS8691: 1 MSPS

– ADS8695: 500 kSPS

– ADS8699: 100 kSPS

• Software programmable input ranges:

– Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V,

±5.12 V, and ±2.56 V

– Unipolar ranges: 0 V–12.288 V, 0 V–10.24 V,

0 V–6.144 V, and 0 V–5.12 V

• 5-V analog supply: 1.65-V to 5-V I/O supply

• Constant resistive input impedance ≥ 1 MΩ

• Input overvoltage protection: up to ±20 V

• On-chip, 4.096-V reference with low drift

• Excellent performance:

– DNL: ±0.6 LSB; INL: ±1.75 LSB

– SNR: 92.5 dB; THD: –110 dB

• ALARM → high, low threshold

• multiSPI™ interface with daisy-chain

• Extended industrial temperature range:

–40°C to +125°C

2 Applications

• Analog input modules

• Data acquisition (DAQ)

• Semiconductor tests

• LCD tests

3 Description

The ADS8691, ADS8695, and ADS8699 belong to a

family of integrated data acquisition system based on

a successive approximation (SAR) analog-to-digital

converter (ADC). The devices feature a high-speed,

high-precision SAR ADC, integrated analog front-end

(AFE) input driver circuit, overvoltage protection circuit

up to ±20 V, and an on-chip 4.096-V reference with

extremely low temperature drift.

The devices operate on a single 5-V analog supply,

but support true bipolar input ranges of ±12.288 V,

±6.144 V, ±10.24 V, ±5.12 V, and ±2.56 V, as well as

unipolar input ranges of 0 V to 12.288 V, 0 V to

10.24 V, 0 V to 6.144 V, and 0 V to 5.12 V. The gain

and offset errors are accurately trimmed within the

specified values for each input range to ensure high

dc precision. The input range selection is done by

software programming of the device internal registers.

The devices offer a high resistive input impedance

(≥ 1 MΩ) irrespective of the selected input range.

The multiSPI digital interface is backward-compatible

to

the

traditional

SPI

protocol.

Additionally,

configurable features simplify interface to a wide

range of host controllers.

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

ADS869x

TSSOP (16)

5.00 mm × 4.40 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Oscillator

CONVST/CS

PGA

1 M:

OVP

1 M:

OVP

2

nd-Order

LPF

ADC

Driver

VBIAS

AIN_P

AIN_GND

4.096-V

Reference

REFGND

DGND

AGND

DVDD

AVDD

Digital Logic

and Interface

REFIO

REFCAP

SCLK

SDI

SDO

18-Bit

SAR ADC

ADS869x

Block Diagram

www.ti.com

ADS8691, ADS8695, ADS8699

SBAS777B – DECEMBER 2016 – REVISED MARCH 2021

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1

Product Folder Links: ADS8691 ADS8695 ADS8699

ADS8691, ADS8695, ADS8699

SBAS777B – DECEMBER 2016 – REVISED MARCH 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

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