Data Sheet

AD7989-1/AD7989-5

TIMING SPECIFICATIONS

Table 4.

Parameter

Symbol

Min

Typ

Max

Unit

AD7989-1

Throughput Rate

100

kSPS

Conversion Time: CNV Rising Edge to Data Available

9500

ns

Acquisition Time

500

ns

Time Between Conversions

10

µs

AD7989-5

Throughput Rate

500

kSPS

Conversion Time: CNV Rising Edge to Data Available

1600

ns

Acquisition Time

400

ns

Time Between Conversions

2

μs

CNV Pulse Width (CS Mode)

500

ns

SCK Period (CS Mode)

VIO Above 4.5 V

10.5

ns

VIO Above 3 V

12

ns

VIO Above 2.7 V

13

ns

VIO Above 2.3 V

15

ns

SCK Period (Chain Mode)

VIO Above 4.5 V

11.5

ns

VIO Above 3 V

13

ns

VIO Above 2.7 V

14

ns

VIO Above 2.3 V

16

ns

SCK Low Time

4.5

ns

SCK High Time

4.5

ns

SCK Falling Edge to Data Remains Valid

3

ns

SCK Falling Edge to Data Valid Delay

VIO Above 4.5 V

9.5

ns

VIO Above 3 V

11

ns

VIO Above 2.7 V

12

ns

VIO Above 2.3 V

14

ns

CNV or SDI Low to SDO D15 MSB Valid (CS Mode)

VIO Above 3 V

10

ns

VIO Above 2.3V

15

ns

CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS Mode)

20

ns

SDI Valid Setup Time from CNV Rising Edge (CS Mode)

5

ns

SDI Valid Hold Time from CNV Rising Edge (CS Mode)

2

ns

SCK Valid Setup Time from CNV Rising Edge (Chain Mode)

5

ns

SCK Valid Hold Time from CNV Rising Edge (Chain Mode)

5

ns

SDI Valid Setup Time from SCK Falling Edge (Chain Mode)

2

ns

SDI Valid Hold Time from SCK Falling Edge (Chain Mode)

3

ns

Rev. A | Page 5 of 24