MXB7846(2004) 查看數據表（PDF） - Maxim Integrated

零件编号

产品描述 (功能)

生产厂家

MXB7846
(Rev.:2004)

2.375V to 5.25V, 4-Wire Touch-Screen Controller with Internal Reference and Temperature Sensor

Maxim Integrated 

2.375V to 5.25V, 4-Wire Touch-Screen Controller

with Internal Reference and Temperature Sensor

TIMING CHARACTERISTICS (Figure 1)

(VDD = 2.7V to 3.6V, VREF = 2.5V, fDCLK = 2MHz (50% duty cycle), fSAMPLE = 125kHz, 12-bit mode, 0.1µF capacitor at REF, TA =

TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

TIMING CHARACTERISTICS (Figure 1)

Acquisition Time

DCLK Clock Period

tACQ

tCP

DCLK Pulse Width High

tCH

DCLK Pulse Width Low

tCL

DIN-to-DCLK Setup Time

tDS

DIN-to-DCLK Hold Time

CS Fall-to-DCLK Rise Setup Time

CS Rise-to-DCLK Rise Ignore

DCLK Falling-to-DOUT Valid

CS Rise-to-DOUT Disable

CS Fall-to-DOUT Enable

tDH

tCSS

tCSH

tDO

tTR

tDV

DCLK Falling-to-BUSY Rising

CS Falling-to-BUSY Enable

CS Rise-to-BUSY Disable

tBD

tBDV

tBTR

CONDITIONS

CLOAD = 50pF

CLOAD = 50pF

CLOAD = 50pF

MIN TYP MAX UNITS

1.5

µs

500

ns

200

ns

200

ns

100

ns

0

ns

100

ns

0

ns

200

ns

200

ns

200

ns

200

ns

200

ns

200

ns

Note 1: Tested at VDD = 2.7V.

Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has

been calibrated.

Note 3: Offset nulled.

Note 4: Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle.

Note 5: Resistance measured from the source to drain of the switch.

Note 6: External load should not change during conversion for specified accuracy.

Note 7: ADC performance is limited by the conversion noise floor, typically 300µVP-P. An external reference below 2.5V can com-

promise the ADC performance.

Note 8: Difference between Temp0 and Temp1. No calibration necessary.

4 _______________________________________________________________________________________

Share Link: