1 Features
1• 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

2 Applications
• Voltage and temperature sensing in:
– Traction inverters
– Onboard chargers
– DC/DC converters
– Integrated power modules

3 Description
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.