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.