ADS1259屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國(guó)德州儀器公司制造生產(chǎn)的ADS1259模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對(duì)模擬信號(hào)進(jìn)行采樣，例如由麥克風(fēng)采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號(hào)。一般來說，數(shù)字輸出是二進(jìn)制補(bǔ)碼二進(jìn)制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進(jìn)行選擇。

1 Features

1? Qualified for Automotive Applications

? AEC-Q100 Qualified with the Following Results:

– Temperature Grade 1: –40°C to 125°C

– HBM ESD Classification 2

– CDM ESD Classification C4B

? Programmable Data Rates: 10 SPS to 14.4 kSPS

? Single-Cycle Settling Digital Filter

? High Performance:

– 21.3 ENOB at 1.2 kSPS

– INL: 3 ppm

– Offset Drift: 0.05 μV/°C

– Gain Drift: 0.5 ppm/°C

? Internal Reference: 2.5 V, 10 ppm/°C Drift

? Internal 2% Accurate Oscillator

? Input Signal Out-of-Range Detection

? Optional Checksum and Redundant Data-Read

Capability to Augment Data Integrity

? SPI?-Compatible Interface, Mode 1

? Analog Supply: 5 V or ±2.5 V

? Digital Supply: 2.7 V to 5 V

2 Applications

? Automotive Power Train

? Electrical Vehicles

3 Description

The ADS1259-Q1 is a precision, low-drift, 24-bit,

analog-to-digital converter (ADC). The device can perform conversions at data rates up to 14.4 kSPS

with high resolution and is therefore ideally suited to

measure rapidly changing signals that have a wide

dynamic range. An integrated low-noise, low-drift 2.5-V reference eliminates the need for an external

voltage reference, thus reducing system cost and

component count.

The converter uses a fourth-order, inherently stable,

delta-sigma (ΔΣ) modulator that provides outstanding

noise performance and linearity. The device can use the integrated oscillator, an external crystal, or an

external clock as the ADC clock source.

A fast-responding input overrange detector flags the

conversion data if an input overrange event occurs.

To augment data integrity in noisy automotive

environments the ADS1259-Q1 offers an optional checksum byte and a redundant conversion data-

read capability.

The ADS1259-Q1 consumes 13 mW during operation and less than 25 μW when powered down. TI offers

the ADS1259-Q1 device in a TSSOP-20 package

with full specification from –40°C to 125°C.