Texas Instruments AMC1035/AMC1035-Q1 Precision Delta-Sigma Modulator
Texas Instruments AMC1035/AMC1035-Q1 Precision Delta-Sigma (ΔΣ) Modulator operates from a 3.0V to 5.5V supply with an externally supplied clock signal from 9MHz to 21MHz. In Manchester mode, the specified clock range is 9MHz to 11MHz. The differential ±1V input structure of the device is optimized for high-noise environments typical for industrial applications. Select the output bitstream of the AMC1035/AMC1035-Q1 to be Manchester coded to prevent setup and hold time requirement considerations of the receiving device and reduce overall circuit layout efforts. When used with a digital filter (such as integrated into the TMS320F28004x, TMS320F2807x, or TMS320F2837x microcontrollers) to decimate the output bitstream, the device can achieve 16 bits of resolution with a dynamic range of 87dB at a data rate of 82kSPS.
The internal reference source of the AMC1035/AMC1035-Q1 supports ratiometric circuit architecture to minimize the negative impact of the supply voltage variation and temperature drift on the accuracy of the measurement. The AMC1035 can also be used for AC power line voltage sensing with a digital isolator and isolated power supply. The Texas Instruments AMC1035-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Delta-sigma modulator optimized for voltage and temperature sensing
- ±1V input voltage range
- 1.6GΩ (typ.) high differential input resistance
- Integrated 2.5V, ±5mA reference for ratiometric measurement
- Excellent DC performance
- ±0.5mV (max.) offset error
- ±6µV/°C (max.) offset drift
- ±0.25% (max.) gain error
- ±45ppm/°C (max.) gain drift
- ±15ppm/°C (max.) ratiometric gain drift
- Selectable Manchester encoded or uncoded bitstream output
- Fully specified over the –40°C to +125°C extended industrial temperature range
Applications
- AC voltage and temperature sensing in industrial applications
- Motor drives
- Photovoltaic inverters
- Uninterruptible power supplies
- Industrial transport systems
Datasheets
Functional Block Diagram
Publicado: 2019-01-08
| Actualizado: 2023-05-23