ADS1203

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Current-shunt delta-sigma modulator, 10MHz CLK, +/-250mV input, 16-bit resolution, ext ref option

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Product details

Parameters

Resolution (Bits) 16 Number of input channels 1 Interface type Serial Architecture Delta-Sigma Modulator Input type Differential Multi-channel configuration Rating Catalog Reference mode Ext, Int Input range (Max) (V) 0.25 Input range (Min) (V) -0.25 Features Oscillator, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 33 Analog voltage AVDD (Min) (V) 4.5 SNR (dB) 85 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 4 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TSSOP (PW) 8 19 mm² 3 x 6.4 VQFN (RGT) 16 9 mm² 3 x 3 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 16-Bit Resolution
  • 14-Bit Linearity
  • ±250mV Input Range with Single +5V Supply
  • 1% Internal Reference Voltage
  • 1% Gain Error
  • Flexible Serial Interface with Four Different Modes
  • Implemented Twinned Binary Coding as Split-Phase or Manchester Coding for One-Line Interfacing
  • Operating Temperature Range:
    –40°C to +125°C
  • APPLICATIONS
    • Motor Control
    • Current Measurement
    • Industrial Process Control
    • Instrumentation
    • Smart Transmitters

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Description

The ADS1203 is a delta-sigma () modulator with a 95dB dynamic range, operating from a single +5V supply. The differential inputs are ideal for direct connection to transducers or low-level signals. With the appropriate digital filter and modulator rate, the device can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes. An effective resolution of 14 bits or SNR of 85dB (typical) can be maintained with a digital filter bandwidth of 40kHz at a modulator rate of 10MHz. The ADS1203 is designed for use in medium- to high-resolution measurement applications including current measurements, smart transmitters, and industrial process control. The ADS1203 is available in TSSOP-8 and QFN-16 (3x3) packages.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet Motor Control, Current Measurement, 1-Bit, 10MHz, 2nd-Order, Delta-Sig Modulator datasheet (Rev. C) Jan. 09, 2008
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Application note How delta-sigma ADCs work, Part 1 (Rev. A) Sep. 19, 2016
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
Application note How delta-sigma ADCs work, Part 2 Nov. 09, 2011
Application note Using the ADS1202 Reference Design Nov. 19, 2003
Application note Clock Divider Circuit for the ADS1202 in Mode 3 Operation Sep. 15, 2003
Application note Interfacing the ADS1202 Modltr With a Pulse Transformer in Galvanically Isolated Jun. 02, 2003
Application note Combining ADS1202 with FPGA Digital Filter for Current Msrmnt in Motor Cntrl App Apr. 28, 2003
Application note Choosing an Optocoupler for the ADS1202 Operating in Mode 1 Feb. 12, 2003

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
Description

The AMC1210MB-EVM is a complete evaluation kit for the AMC1210 & ADS1205 in resolver applications and part of a modular evaluation system for evaluating TI delta-sigma modulators. The AMC1210MB-EVM software allows use of the AMC1210 in a variety of configurations for resolver and current shunt (...)

Features
  • Full-featured evaluation board for the AMC1210 quad digital filter for second-order delta-sigma modulators
  • Contains all support circuitry needed for the AMC1210
  • Onboard clocking for built-in ADS1205
  • Stellaris™ LM3S3748 ARM™ processor and parallel interface to AMC1210
  • JTAG header for reprogramming the (...)

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOL Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC 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 transformer-coupled (...)
CALCULATION TOOL Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
CALCULATION TOOL Download
SBAR010.ZIP (3354 KB)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 8 View options
VQFN (RGT) 16 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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