AD671 datasheet(13/16 Pages) AD

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AD671

REV. B

–13–

Figure 17. Typical FFT Plot of AD671 and Discrete SHA

FIN = 500 kHz

DYNAMIC CHARACTERISTICS

(@ +25

°C, tested using the discrete SHA in Figure 15 with V

CC = +5 V,

VLOGIC = +5 V, VEE = –5 V, fSAMPLE = 1 MSPS)

Model

AD671JD-500

Typ

Units

Effective Number of Bits (ENOB)

FIN = 100 kHz

11.3

Bits

FIN = 490 kHz

11.2

Bits

Signal-to-Noise and Distortion (S/N+D) Ratio

FIN = 100 kHz

FIN = 490 kHz

Total Harmonic Distortion (THD)

FIN = 100 kHz

–80

FIN = 490 kHz

–75

Peak Spurious (dc to 490 kHz)

–79

Peak Harmonic Component (dc to 490 kHz)

–76

NOTE

IN amplitude = –0.2 dB @ 100 kHz and –0.9 dB @ 490 kHz, bipolar mode

unless otherwise indicated. See Definition of Specifications for additional

information.

MULTICHANNNEL DATA ACQUISITION SYSTEM

The AD684, a quad high speed sample-and-hold amplifier is

ideally suited for multichannel data acquisition applications.

Figure 18 shows a typical data acquisition circuit using the

AD684 (SHA), ADG201HS (Multiplexer), AD588 (Reference)

and the AD671. The AD684 is configured to simultaneously

sample four analog inputs. Each held analog input voltage can

be selected by the multiplexer and buffered by the AD841. The

AD671 is connected in the bipolar input range (

±5 V).

Figure 18. Data Acquisition System Using the AD684 and the AD671

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