MAX1234ETI+T Maxim Integrated Products, MAX1234ETI+T Datasheet - Page 5

• Manufacturer Part Number: MAX1234ETI+T
• Description: IC CNTRLR TOUCH 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Resistiver

Specifications of MAX1234ETI+T

• Touch Panel Interface: 4-Wire
• Number Of Inputs/keys: 1, 4 x 4 Keypad
• Resolution (bits): 8, 10, 12 b
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Data Rate/sampling Rate (sps, Bps): 50k
• Voltage Reference: Internal
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Applications: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(DV
(MAX1233), V
+85°C, unless otherwise noted. Typical values are at T
Note 1: Tested at DV
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the offset and gain errors
Note 3: Offset nulled.
Note 4: Difference between TEMP1 and TEMP2; temperature in °K = (V
Note 5: Temperature coefficient is -2.1mV/°C. Determine absolute temperature by extrapolating from a calibrated value.
Note 6: ADC performance is limited by the conversion noise floor, typically 300µV
Note 7: Guaranteed from code 5 to 255.
Input Capacitance
DIGITAL OUTPUT (DOUT)
Output Voltage Low
Output Voltage High
DIGITAL OUTPUT (BUSY, PENIRQ, KEYIRQ, R_, C_)
Output Voltage Low
Output Voltage High
Supply Voltage (Note 12)
Analog and Digital Supply
Current
TIMING CHARACTERISTICS
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
DIN to SCLK Rise Setup
SCLK Rise to DIN Hold
SCLK Fall to DOUT Valid
CS Fall to DOUT Enabled
CS Rise to DOUT Disabled
CS Fall to SCLK Rise
CS Fall to SCLK Ignored
SCLK Rise to R_/C_ Data Valid
CS Pulse Width High
Controllers Include DAC and Keypad Controller
DD
= AV
have been removed.
compromise the ADC performance.
PARAMETER
DD
REF
= +2.7V to +3.6V (MAX1233), DV
= 4.096V (MAX1234); f
_______________________________________________________________________________________
DD
= AV
DD
±15kV ESD-Protected Touch-Screen
= +2.7V (MAX1233), DV
SYMBOL
I
AV
AVDD
I
DV
DVDD
t
t
t
t
t
V
V
t
V
V
C
DOD
GPO
CSW
t
t
DOV
CSH
t
t
t
t
CSS
CP
CH
CL
DS
DH
DV
OH
OH
OL
OL
DD
IN
DD
SCLK
+
/
= 10MHz, f
I
I
I
I
I
MAX1233
MAX1234
Idle; all blocks shut down
Only ADC on; f
Only DAC on; no load
Only internal reference on
C
C
C
C
SINK
SINK
SOURCE
SINK
SOURCE
LOAD
LOAD
LOAD
LOAD
DD
POWER REQUIREMENTS
A
= 2mA
= 4mA
= 0.2mA
= AV
= +25°C.)
= 50pF
= 50pF
= 50pF
= 50pF (Note 13)
= 1.5mA
= 0.2mA
DD
SAMPLE
DD
= AV
SAMPLE
CONDITIONS
= +4.75V to +5.25V (MAX1234), external reference V
DD
= 50ksps, 12-bit mode, 0.1µF capacitor at REF, T
= +5V (MAX1234).
= 20ksps
TEMP2
- V
TEMP1
P-P
. An external reference below 2.5V can
) × 2680°K/V. No calibration is necessary.
DV
DV
4.75
MIN
100
0.5
0.5
2.7
40
40
40
40
40
DD
DD
0
0
-
-
TYP
150
150
670
0.5
15
3
5
MAX
5.25
500
230
900
230
0.4
0.8
0.4
3.6
40
45
40
5
A
REF
= -40°C to
UNITS
= 2.5V
pF
µA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
V
V
V
V
5