This paper presents a 12-bit 150-MHz current steering DAC with hierarchical symmetrical switching sequence that compensates gradient errors. The circuit of the DAC employs segmented architecture; the least significant bits (LSBs) steer a binary weighted array, while the most significant bits (MSBs) are thermometer decoded and steer a unary array. The measured differential nonlinearity and integral nonlinearity are ±0.6 LSB and ±0.9 LSB, respectively. The circuit is fabricated in 0.5 μm, two-poly two-metal, 5.0 V, mixed-signal CMOS process. It occupies 1.27 mm×0.96 mm chip area, when operating at 150 MHz and dissipates 91.6 mW from a 5.0 V power supply, which is much smaller.
|Title of host publication||Procs of the 2004 IEEE Region 10 Conference, TENCON|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication status||Published - 2004|