AD4020BRMZ datasheet(8/37 Pages) AD

Part #	AD4020BRMZ

Description	Precision SAR, Differential ADC

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Data Sheet

AD4020

Rev. A | Page 7 of 36

Table 3. Register Read/Write Timing

Parameter

Symbol

Min

Typ

Max

Unit

READ/WRITE OPERATION

CNV Pulse Width1

tCNVH

10

ns

SCK Period

tSCK

VIO > 2.7 V

9.8

ns

VIO > 1.7 V

12.3

ns

SCK Time

Low

tSCKL

3

ns

High

tSCKH

3

ns

READ OPERATION

CNV Low to SDO D17 MSB Valid Delay

tEN

VIO > 2.7 V

10

ns

VIO > 1.7 V

13

ns

SCK Falling Edge to Data Remains Valid

tHSDO

1.5

ns

SCK Falling Edge to Data Valid Delay

tDSDO

VIO > 2.7 V

7.5

ns

VIO > 1.7 V

10.5

ns

CNV Rising Edge to SDO High Impedance

tDIS

20

ns

WRITE OPERATION

SDI Valid Setup Time from SCK Rising Edge

tSSDISCK

2

ns

SDI Valid Hold Time from SCK Rising Edge

tHSDISCK

2

ns

CNV Rising Edge to SCK Edge Hold Time

tHCNVSCK

0

ns

CNV Falling Edge to SCK Active Edge Setup Time

tSCNVSCK

6

ns

1

For turbo mode, tCNVH must match the tQUIET1 minimum.

Table 4. Achievable Throughput for Different Modes of Operation

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

THROUGHPUT, CS MODE

3-Wire and 4-Wire Turbo Mode

fSCK = 100 MHz, VIO ≥ 2.7 V

1.80

MSPS

fSCK = 80 MHz, VIO < 2.7 V

1.80

MSPS

3-Wire and 4-Wire Turbo Mode and Six Status Bits

fSCK = 100 MHz, VIO ≥ 2.7 V

1.80

MSPS

fSCK = 80 MHz, VIO < 2.7 V

1.67

MSPS

3-Wire and 4-Wire Mode

fSCK = 100 MHz, VIO ≥ 2.7 V

1.61

MSPS

fSCK = 80 MHz, VIO < 2.7 V

1.49

MSPS

3-Wire and 4-Wire Mode and Six Status Bits

fSCK = 100 MHz, VIO ≥ 2.7 V

1.47

MSPS

fSCK = 80 MHz, VIO < 2.7 V

1.34

MSPS

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