mxb7846 Maxim Integrated Products, Inc., mxb7846 Datasheet - Page 4

• Manufacturer Part Number: mxb7846
• Description: Mxb7846 2.375v To 5.25v, 4-wire Touch-screen Controller With Internal Reference And Temperature Sensor
• Manufacturer: Maxim Integrated Products, Inc.

TIMING CHARACTERISTICS (Figure 1)
(V
T
2.375V to 5.25V, 4-Wire Touch-Screen Controller
with Internal Reference and Temperature Sensor
4
Note 1: Tested at V
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
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 300µV
Note 8: Difference between Temp0 and Temp1. No calibration necessary.
MIN
TIMING CHARACTERISTICS (Figure 1)
Acquisition Time
DCLK Clock Period
DCLK Pulse Width High
DCLK Pulse Width Low
DIN-to-DCLK Setup Time
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
DCLK Falling-to-BUSY Rising
CS Falling-to-BUSY Enable
CS Rise-to-BUSY Disable
DD
_______________________________________________________________________________________
to T
= 2.7V to 3.6V, V
MAX
been calibrated.
promise the ADC performance.
PARAMETER
, unless otherwise noted. Typical values are at T
DD
REF
= 2.7V.
= 2.5V, f
DCLK
SYM B O L
t
t
t
t
t
ACQ
t
t
t
t
t
t
CSS
CSH
t
t
BDV
t
BTR
DO
CH
DH
BD
CP
CL
DS
TR
DV
= 2MHz (50% duty cycle), f
C
C
C
LOAD
LOAD
LOAD
= 50pF
= 50pF
= 50pF
A
= +25°C.)
CONDITIONS
SAMPLE
= 125kHz, 12-bit mode, 0.1µF capacitor at REF, T
P-P
. An external reference below 2.5V can com-
MIN
500
200
200
100
100
1.5
0
0
TYP
MAX
200
200
200
200
200
200
UNITS
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
A
=