High-temperature 12-bit successive approximation ADC
This successive approximation ADC was developed for the automotive market, with the requirement to operate seamlessly at temperature peaks up to 200°C. The ADC has a resolution of 12 bit and a sampling frequency of 200ksamples/sec. The current consumption is only 400uA for a die area of 0.45mm2 (including reference buffer). Although it was manufactured in a 0.65um BiCMOS process, we could keep the supply voltage as low as 2.5V.
Features:
- Resolution 12 bits
- INL < ±2 LSB / DNL < ±1 LSB
- Fout is 200ks/sec (Fclock: 3.6MHz)
- Area 0.45mm2 (reference buffer included)
- Current consumption 400uA (analog parts)
- Vdd is 2.5V
- 0.65um BiCMOS technology
- Temperature range -40°C to 200°C