AD779AD datasheet(4/12 Pages) AD

部件名	AD779AD

功能描述	14-Bit 128 kSPS Complete Sampling ADC

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制造商	AD [Analog Devices]

网页	http://www.analog.com

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AD779

–4–

REV. B

TIMING SPECIFICATIONS

(All device types TMIN to TMAX, VCC = +12 V

5%, VEE = –12 V

5%, VDD = +5 V

10%)

Parameter

Symbol

Min

Max

Units

Conversion Rate

1

tCR

7.8

µs

Convert Pulse Width

tCP

0.097

3.0

µs

Aperture Delay

tAD

520

ns

Conversion Time

tC

6.3

µs

Status Delay

tSD

0

400

ns

Access Time

2, 3

tBA

10

100

ns

10

57

4

ns

Float Delay

5

tFD

10

80

ns

Output Delay

tOD

0ns

OE

Delay

tOE

20

ns

Read Pulse Width

tRP

100

ns

Conversion Delay

tCD

400

ns

NOTES

1Includes Acquisition Time.

2Measured from the falling edge of OE/EOCEN (0.8 V) to the time at which the

data lines/EOC cross 2.0 V or 0.8 V. See Figure 4.

3C

OUT = 100 pF.

4C

OUT = 50 pF.

5Measured from the rising edge of OE/EOCEN (2.0 V) to the time at which the

output voltage changes by 0.5 V. See Figure 4; COUT = 10 pF.

Specifications subject to change without notice.

Figure 1. Conversion Timing

Figure 2. Output Timing

Figure 3. EOC Timing

Figure 4. Load Circuit for Bus Timing Specifications

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