AD7142 datasheet(7/73 Pages) AD

Teilenummer	AD7142

Bauteilbeschribung	Programmable Controller for Capacitance Touch Sensors

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AD7142

Rev. A | Page 6 of 72

SPI TIMING SPECIFICATIONS (AD7142)

TA = −40°C to +85°C; VDRIVE = 1.65 V to 3.6 V; AVCC, DVCC = 2.6 V to 3.6 V, unless otherwise noted. Sample tested at 25°C to ensure

compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of VCC) and timed from a voltage level of 1.6 V.

Table 4. SPI Timing Specifications

Parameter

Limit at TMIN, TMAX

Unit

Description

fSCLK

5

MHz max

t1

5

ns min

CS falling edge to first SCLK falling edge

t2

20

ns min

SCLK high pulse width

t3

20

ns min

SCLK low pulse width

t4

15

ns min

SDI setup time

t5

15

ns min

SDI hold time

t6

20

ns max

SDO access time after SCLK falling edge

t7

16

ns max

CS rising edge to SDO high impedance

t8

15

ns min

SCLK rising edge to CS high

CS

SCLK

SDI

SDO

t1

116

15

MSB

LSB

23

MSB

LSB

12

15

16

t2

t4

t5

t3

t6

t7

t8

Figure 3. SPI Detailed Timing Diagram

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