AD7988-1_1208 datasheet(5/24 Pages) AD | 16-Bit Lower Power PulSAR ADCs in MSOP/LFCSP (QFN)

Part #	AD7988-1_1208

Description	16-Bit Lower Power PulSAR ADCs in MSOP/LFCSP (QFN)

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Data Sheet

AD7988-1/AD7988-5

Rev. C | Page 5 of 24

TIMING SPECIFICATIONS

VDD = 2.37 V to 2.63 V, VIO = 3.3 V to 5.5 V, −40°C to +125°C unless otherwise stated. See Figure 2 and Figure 3 for load conditions.

Table 4.

Parameter

Symbol

Min

Typ

Max

Unit

AD7988-1

Throughput Rate

100

kHz

Conversion Time: CNV Rising Edge to Data Available

t

CONV

9.5

μs

Acquisition Time

t

ACQ

500

ns

Time Between Conversions

t

CYC

10

μs

AD7988-5

Throughput Rate

500

kHz

Conversion Time: CNV Rising Edge to Data Available

t

CONV

1.6

μs

Acquisition Time

t

ACQ

400

ns

Time Between Conversions

t

CYC

2

μs

CNV Pulse Width (CS Mode)

t

CNVH

500

ns

SCK Period (CS Mode)

t

SCK

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)

t

SCK

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

t

SCKL

4.5

ns

SCK High Time

t

SCKH

4.5

ns

SCK Falling Edge to Data Remains Valid

t

HSDO

3

ns

SCK Falling Edge to Data Valid Delay

t

DSDO

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)

t

EN

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)

t

DIS

20

ns

SDI Valid Setup Time from CNV Rising Edge

t

SSDICNV

5

ns

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

t

HSDICNV

2

ns

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

t

HSDICNV

0

ns

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

t

SSCKCNV

5

ns

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

t

HSCKCNV

5

ns

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

t

SSDISCK

2

ns

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

t

HSDISCK

3

ns

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