Product details

Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 14.4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Rating Automotive Reference mode Ext, Int Input range (Max) (V) 2.75, 5.35 Input range (Min) (V) -2.7, 0 Features 50/60 Hz Rejection, Oscillator Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 13 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25
Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 14.4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Rating Automotive Reference mode Ext, Int Input range (Max) (V) 2.75, 5.35 Input range (Min) (V) -2.7, 0 Features 50/60 Hz Rejection, Oscillator Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 13 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25
TSSOP (PW) 20 29 mm² 6.5 x 4.4
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet Automotive, 14.4-kSPS, 24-Bit ADC with Integrated Low-Drift Reference datasheet 19 Mar 2014
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs PDF | HTML 23 Mar 2022
Application note A Basic Guide to Bridge Measurements PDF | HTML 18 Feb 2022
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23 Aug 2021
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Application note Digital Filter Types in Delta-Sigma ADCs PDF | HTML 27 Jun 2017
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015

Design & development

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Simulation model

ADS1259 IBIS Model

SBAM018.ZIP (112 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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TINA-TI — SPICE-based analog simulation program

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User guide: PDF
Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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Reference designs

TIDA-03050 — Automotive, mA-to-kA Range, Current Shunt Sensor Reference Design

This reference design shows how to detect current from the mA-to-KA range using a busbar-type shunt resistor. The increasing demand of high-capacity batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) drives the requirement for larger current spans and highly-accurate current (...)
Schematic: PDF
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