SX8654EVK datasheet(10/62 Pages) SEMTECH

Part #	SX8654EVK

Description	Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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ADVANCED COMMUNICATIONS & SENSING

Rev 1 – 25

th July 2011

10

www.semtech.com

SX8654/SX8655/SX8656

Haptics Enabled 4/5-Wire

Resistive Touchscreen Controller with Proximity Sensing

Symbol

Description

Conditions

Min

Typ.

Max

Unit

PROX

(PENDET/TRG mode, pen up,

TOUCHRATE=80cps, PROX ON,

SCANPERIOD=200ms,

HIGHIM=ON,

SENSITIVITY=Max,

FREQ=150kHz, BOOST=OFF,

HAPT OFF)

-

8

20

HAPT

(MAN mode, no command,

LRA-PWM mode,

MIN= 44.8kHz/50%, GAIN = Max,

BW = 100, MOUTP/N floating,

Squelch=011)

-

115

145

MVDD

Haptics supply voltage

-

VDD

-

3.6

V

OFF

-

0.01

1

µA

MIDD

Haptics supply current

SQUELCH

(LRA-PWM mode,

MIN= 44.8kHz/50%, GAIN = Max,

BW = 100, MOUTP/N floating,

Squelch=011)

-

6

10

µA

Digital I/Os (ADDR, SCL, SDA, NRST, NIRQ, AUX1, AUX2, AUX3, MIN)

SCL, SDA, NRST

0.8*VDD

-

3.6

VIH

High level input voltage

Other pins

0.8*VDD

-

VDD+0.2

V

VIL

Low level input voltage

-

-0.3

-

0.8

V

ILEAK

Input leakage current

-

-1

-

1

µA

CI

Input capacitance

-

5

-

pF

VOH

High level output voltage

IOH = 4mA

0.8*VDD

-

V

VOL

Low level output voltage

IOL = 4mA

-

0.4

V

VPULL

External pull-up voltage

SCL, SDA, NRST, NIRQ

-

3.6

V

Haptics Interface

IDRV

Maximum drive current

(MOUTP/MOUTN)

MVDD = 3.6V

-

250

-

mA

VOFF

Output squelch differential error

(from 0V ideal)

LRA or ERM, PWM or I2C,

AmplitudeCode within squelch

range, GAIN = Max, BW = 100,

MOUTP/N floating, Squelch=011

0

(1)

0

(1)

mV

VERR

Output differential error

(from 1.135V ideal)

LRA or ERM, I2C,

AmplitudeCode = +127 (Max)

GAIN = Min, BW = 100,

MOUTP/N floating

125

(2)

0

125

(2)

mV

VDRV

Drive voltage (MOUTP/MOUTN)

-

VDDM

V

VDROP

Drop voltage (MOUTP/MOUTN)

From MVDD/MGND,

@250mA

-

150

mV

ISHORT

Short-circuit detection current

Measured @MIDD

-

300

-

mA

FMINC

Motor input (MIN) frequency in

I2C mode

40-60% duty cycle

-

50

MHz

HAPTRANGE = 0

12.8

-

25.6

kHz

FMINP

Motor input (MIN) frequency in

PWM mode

HAPTRANGE = 1

25.6

-

51.2

kHz

DCMIN

Motor input (MIN) duty cycle in

PWM mode

2

-

98

%

TWRNG

Warning temperature

-

120

-

TALRM

Alarm temperature

Junction temperature

-

155

-

°C

Touchscreen Interface

ARES

ADC resolution

12

-

bits

AOFF

ADC offset

-

± 1

-

AGE

ADC gain error

At full scale

-

0.5

-

ADNL

ADC differential non-linearity

-

± 1

-

AINL

ADC integral non-linearity

-

± 1.5

-

LSB

RBIAS

Biasing resistance

-

5

-

Proximity Sensing Interface

CDC

External capacitance to be

compensated

-

300

pF

tPROX

Scan period (reaction time)

Programmable

-

200

-

ms

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