AD7631/AD7634

Preliminary Technical Data

Rev. PrC | Page 6 of 14

TIMING SPECIFICATIONS

Table 3.

Parameter

Symbol

Min

Typ

Max

Unit

CONVERSION AND RESET

Convert Pulse Width

10

ns

Time Between Conversions (Warp Mode/Normal Mode1)

ns

AD7631

4

μs

AD7634 (Warp Mode/Normal Mode/Impulse Mode)2

1.49/1.75/2.22

μs

CNVST Low to BUSY High Delay

35

ns

BUSY High All Modes (Except Master Serial Read After Convert)

AD7631

TBD

μs

AD7634 (Warp Mode/Normal Mode/Impulse Mode)

TBD

μs

Aperture Delay

2

ns

End of Conversion to BUSY Low Delay

10

ns

Conversion Time

AD7631

TBD

μs

AD7634 (Warp Mode/Normal Mode/Impulse Mode)

TBD

μs

Acquisition Time

AD7631

250

ns

AD7634 (Warp Mode/Normal Mode/Impulse Mode)

250

ns

RESET Pulse Width

10

ns

PARALLEL INTERFACE MODES

CNVST Low to DATA Valid Delay

AD7631

1.5

μs

AD7634 (Warp Mode/Normal Mode/Impulse Mode)

1/1.25/1.5

μs

DATA Valid to BUSY Low Delay

12

ns

Bus Access Request to DATA Valid

45

ns

Bus Relinquish Time

5

15

ns

MASTER SERIAL INTERFACE MODES3

CS Low to SYNC Valid Delay

10

ns

CS Low to Internal SCLK Valid Delay

10

ns

CS Low to SDOUT Delay

10

ns

CNVST Low to SYNC Delay

AD7631

525

ns

AD7634 (Warp Mode/Normal Mode/Impulse Mode)

25/275/525

ns

SYNC Asserted to SCLK First Edge Delay

3

ns

Internal SCLK Period4

25

40

ns

Internal SCLK High4

12

ns

Internal SCLK Low4

7

ns

SDOUT Valid Setup Time4

4

ns

SDOUT Valid Hold Time4

2

ns

SCLK Last Edge to SYNC Delay4

3

ns

CS High to SYNC HI-Z

10

ns

CS High to Internal SCLK HI-Z

10

ns

CS High to SDOUT HI-Z

10

ns