AD7910ARMZ2 datasheet(13/24 Pages) AD

13 / 24 page

AD7910/AD7920

Rev. C | Page 13 of 24

CIRCUIT INFORMATION

The AD7910/AD7920 are fast, micropower, 10-bit/12-bit,

single-supply A/D converters, respectively. The parts can be

operated from a 2.35 V to 5.25 V supply. When operated from

either a 5 V supply or a 3 V supply, the AD7910/AD7920 are

capable of throughput rates of 250 kSPS when provided with a

5 MHz clock.

The AD7910/AD7920 provide the user with an on-chip track-

and-hold, A/D converter, and a serial interface housed in a tiny

6-lead SC70 package or 8-lead MSOP package, which offers the

user considerable space saving advantages over alternative

solutions.

The serial clock input accesses data from the part but also

provides the clock source for the successive approximation A/D

converter. The analog input range is 0 V to VDD. An external

reference is not required for the ADC and there is no reference

on-chip. The reference for the AD7910/AD7920 is derived from

the power supply and thus gives the widest dynamic input

range.

The AD7910/AD7920 also feature a power-down option to

allow power saving between conversions. The power-down

feature is implemented across the standard serial interface, as

described in the Modes of Operation section.

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