ADS7044 datasheet(7/37 Pages) TI1

Numer części	ADS7044

Szczegółowy opis	Ultra-Low Power, Ultra-Small Size, 12-Bit, 1-MSPS, SAR ADC

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7

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9

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12

13

14

SCLK

CS

tSU_CSCK

tDV_CSDO

tD_CKDO

tDZ_CSDO

Sample

N

Sample

N+1

tACQ

tCONV

tCYCLE

tPH_CS

0

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

SDO

Data for sample N

D1

D0

tPH_CK

tPL_CK

tD_CKCS

tSCLK

ADS7044

www.ti.com

SBAS682A – NOVEMBER 2014 – REVISED NOVEMBER 2014

6.6 Timing Characteristics

All specifications are at TA = –40°C to 125°C, AVDD = 1.8 V to 3.6 V, and DVDD = 1.65 V to 3.6 V, unless otherwise

specified.

PARAMETER

MIN

TYP

MAX

UNIT

TIMING SPECIFICATIONS

fTHROUGHPUT

Throughput

1

MSPS

tCYCLE

Cycle time

1

µs

tCONV

Conversion time

12.5 × tSCLK + tSU_CSCK

ns

tDV_CSDO

Delay time: CS falling to data enable

10

ns

tD_CKDO

Delay time: SCLK falling to (next) data valid on DOUT

30

ns

tDZ_CSDO

Delay time: CS rising to DOUT going to 3-state

5

ns

TIMING REQUIREMENTS

tACQ

Acquisition time

200

ns

fSCLK

SCLK frequency

16

MHz

tSCLK

SCLK period

62.5

ns

tPH_CK

SCLK high time

0.45

0.55

tSCLK

tPL_CK

SCLK low time

0.45

0.55

tSCLK

tPH_CS

CS high time

60

ns

tSU_CSCK

Setup time: CS falling to SCLK falling

15

ns

tD_CKCS

Delay time: last SCLK falling to CS rising

10

ns

Figure 1. Timing Diagram

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