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AMC1035-Q1

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

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Data sheet

AMC1035-Q1

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 20 Number of input channels 1 Interface type Serial Architecture Delta-Sigma Modulator Input type Differential Rating Automotive Reference mode Internal Input voltage range (max) (V) 1 Input voltage range (min) (V) -1 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 27 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 86 Digital supply (min) (V) 3 Digital supply (max) (V) 5.5
Resolution (Bits) 16 Sample rate (max) (ksps) 20 Number of input channels 1 Interface type Serial Architecture Delta-Sigma Modulator Input type Differential Rating Automotive Reference mode Internal Input voltage range (max) (V) 1 Input voltage range (min) (V) -1 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 27 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 86 Digital supply (min) (V) 3 Digital supply (max) (V) 5.5
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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
  • 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

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.

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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* Data sheet AMC1035-Q1 Delta-Sigma Modulator With a Bipolar Input of ±1 V and Reference Output of 2.5 V datasheet (Rev. A) PDF | HTML Nov 14, 2019
White paper Comparing Isolated Amplifiers and Isolated Modulators (Rev. B) PDF | HTML Jun 4, 2024
Functional safety information AMC1035-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML Jun 13, 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 29, 2023
Application brief Comparing shunt- and hall-based isolated current-sensing solutions in HEV/EV (Rev. C) PDF | HTML Mar 28, 2023
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) Jun 19, 2020

Design & development

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Evaluation board

AMC1035EVM — AMC1035 evaluation module

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.

User guide: PDF | HTML
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Calculation tool

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SBAR020 — Isolated Amplifier Current Sensing Excel Calculator

This calculator provides estimates of the errors associated with using isolation amplifier devices in a current sensing configuration.
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