Datasheet Analog Devices AD7266 — 数据表

Differential/Single-Ended Input, Dual
2 MSPS, 12-Bit, 3-Channel SAR ADC
AD7266
FEATURES FUNCTIONAL BLOCK DIAGRAM
REF SELECT The conversion process and data acquisition use standard
control inputs allowing easy interfacing to microprocessors or
DSPs. The input signal is sampled on the falling edge of CS;
conversion is also initiated at this point. The conversion time is
determined by the SCLK frequency. There are no pipelined
delays associated with the part.
The AD7266 uses advanced design techniques to achieve very
low power dissipation at high throughput rates. With 5 V
supplies and a 2 MSPS throughput rate, the part consumes
6.2 mA maximum. The part also offers flexible power/
throughput rate management when operating in normal mode
as the quiescent current consumption is so low.
The analog input range for the part can be selected to be a 0 V
to VREF (or 2 × VREF) range, with either straight binary or twos
complement output coding. The AD7266 has an on-chip 2.5 V
reference that can be overdriven when an external reference is
preferred. This external reference range is 100 mV to VDD. REF BUF MUX T/H AVDD DVDD AD7266 VA1
VA2
VA3 …