Automotive precision delta-sigma modulator with ±1-V bipolar input and 2.5-V reference output


Product details


Resolution (Bits) 16 Number of input channels 1 Sample rate (Max) (kSPS) 20 Interface type Serial Architecture Delta-Sigma Input type Differential Rating Automotive Reference mode Int Input range (Max) (V) 1 Input range (Min) (V) -1 Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 27 Analog voltage AVDD (Min) (V) 3 SNR (dB) 86 Analog voltage AVDD (Max) (V) 5.5 INL (Max) (+/-LSB) 4 Digital supply (Min) (V) 3 Digital supply (Max) (V) 5.5 open-in-new Find other Precision ADCs (<=10MSPS)

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SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Precision ADCs (<=10MSPS)


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Delta-sigma modulator optimized for voltage and temperature sensing:
    • Input voltage range: ±1 V
    • High differential input resistance: 1.6 GΩ (typ)
    • Integrated 2.5-V, ±5-mA reference for ratiometric measurement
  • Excellent DC performance:
    • Offset error: ±0.5 mV (max)
    • Offset drift: ±6 µV/°C (max)
    • Gain error: ±0.25% (max)
    • Gain drift: ±45 ppm/°C (max)
    • Ratiometric gain drift: ±15 ppm/°C (max)
  • Selectable Manchester encoded or uncoded bitstream output

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The AMC1035-Q1 is a precision, delta-sigma (ΔΣ) modulator that operates from a single 3.0-V to 5.5-V supply and with an externally supplied clock signal in the range of 9 MHz to 21 MHz. In Manchester mode, the specified clock range is 9 MHz to 11 MHz. The differential ±1-V input structure of the device is optimized for voltage and temperature sensing applications.

Select the output bitstream of the AMC1035-Q1 to be Manchester coded to prevent setup and hold time requirement considerations of the receiving device and to reduce overall circuit layout efforts. When used with a digital filter (such as integrated in the TMS320F28004x, TMS320F2807x, or TMS320F2837x microcontroller families) to decimate the output bitstream, the device can achieve 16 bits of resolution with a dynamic range of 87 dB at a data rate of 82 kSPS.

The internal reference source of the AMC1035-Q1 supports a ratiometric circuit architecture to minimize the negative impact of the supply voltage variation and temperature drift on the accuracy of the measurement.

The AMC1035-Q1 can also be used for high common-mode AC voltage sensing with a digital isolator and isolated power supply.

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Technical documentation

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Type Title Date
* Datasheet AMC1035-Q1 Delta-Sigma Modulator With a Bipolar Input of ±1 V and Reference Output of 2.5 V datasheet (Rev. A) Nov. 14, 2019
White papers Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
User guides AMC1035EVM User's Guide Jul. 27, 2018

Design & development

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

Hardware development

document-generic User guide

The AMC1035 evaluation module (EVM) is a platform for evaluating the AMC1035, which is a single-channel delta-sigma modulator designed for voltage, current, and temperature sensing. AMC1035EVM allows the user to explore all of the features of the AMC1035.

  • ±1-V input voltage range
  • Integrated 2.5-V ±10-mA reference output for ratiometric measurements
  • Manchester-coded or uncoded bitstream output
  • Configurable power-supply input
  • Screw terminals for easy access to analog inputs and outputs

Design tools & simulation

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 (...)
  • 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
  • (...)
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
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 (...)
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 (...)
  • 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
  • (...)

CAD/CAE symbols

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