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


Package | PIN: SOIC (D) | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.76
10-24 $3.38
25-99 $3.15
100-249 $2.76
250-499 $2.59
500-749 $2.20
750-999 $1.85
1000+ $1.77


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Delta-sigma modulator optimized for voltage and temperature sensing:
    • ±1-V input voltage range
    • 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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Texas Instruments  PAMC1035QDRQ1

The AMC1035-Q1 is a precision, delta-sigma (ΔΣ) modulator that operates from a single3.0-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 inputstructure 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 andhold time requirement considerations of the receiving device and to reduce overall circuit layoutefforts. When used with a digital filter (such as integrated in theTMS320F28004x,TMS320F2807x, orTMS320F2837x microcontroller families)to decimate the output bitstream, the device can achieve 16 bits of resolution with a dynamic rangeof 87 dB at a data rate of 82 kSPS.

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

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