Development of an on-chip configurable DAC module for monolithic active pixel sensor. (1st March 2022)

• Record Type: Journal Article
• Authors: Tian, Y.; Yang, P.; Wang, Q.; Zhou, W.; Niu, X.; Huang, J.; Zhao, C.
• Is Part Of: Journal of instrumentation. Volume 17:Number 3(2022)
• Publication Date: 2022-03-01
• Subjects: Analogue electronic circuits -- Pixelated detectors and associated VLSI electronics -- VLSI circuits; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/17/03/C03006
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: This paper describes an on-chip configurable Digital to Analog Converter (DAC) module for monolithic active pixel sensor. The DAC module consists of four 10-bit voltage DACs, seven 8-bit current DACs, a bandgap circuit, and a configure interface. The voltage DAC is implemented with an R-2R resistor ladder network, and each LSB corresponds to 3 mV. The current DAC is in the current-steering type with a thermometer code. Each LSB of the current DAC corresponds to 10 nA. The bandgap circuit provides a stable, temperature-independent reference voltage of 1.25 V to the DACs. All the DACs can be accessed and configured with the configure interface. The DAC module covers 3074 µm × 400 µm, and the total power consumption is 46.2 mW. This paper will discuss the design and performance of this DAC module.