AD7148 datasheet(5/56 Pages) AD

Part #	AD7148

Description	Programmable Touch Controller for Single Electrode Capacitance Sensors

PDF	56 Pages

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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AD7148

Rev. 0 | Page 5 of 56

I2C TIMING SPECIFICATIONS (AD7148-1)

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

All input signals timed from a voltage level of 1.6 V.

Table 4.

Parameter1

Limit

Unit

Description

fSCLK

400

kHz max

0.6

μs min

Start condition hold time, tHD; STA

1.3

μs min

Clock low period, tLOW

0.6

μs min

Clock high period, tHIGH

100

ns min

Data setup time, tSU; DAT

300

ns min

Data hold time, tHD; DAT

0.6

μs min

Stop condition setup time, tSU; STO

0.6

μs min

Start condition setup time, tSU; STA

1.3

μs min

Bus free time between stop and start conditions, tBUF

300

ns max

Clock/data rise time

300

ns max

Clock/data fall time

1 Guaranteed by design, not production tested.

I2C Timing Diagram

SCLK

SDA

STOP START

STOP

START

Figure 2. I2C Detailed Timing Diagram

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