MAX1441 Datasheet, PDF (3/41 Pages) Maxim Integrated Products – Automotive, Two-Channel Proximity and Touch Sensor

Automotive, Two-Channel Proximity and
Touch Sensor
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = 5V to 28V, VAA = VDD, TA = -40NC to +105NC. Typical values are at VBATT = 14V, fEX = 300kHz, TA = +25NC, unless oth-
erwise noted.) (Note 2)
PARAMETER
SYMBOL
CAPACITIVE OFFSET DACS
Offset Adjustment Range
Offset Adjustment Resolution
LOGIC INPUTS/OUTPUTS (P0._, RESET)
Output Logic Low
VOL
6 bits
ISINK = 2mA
CONDITIONS
Output Logic High
V_OH
ISOURCE = 2mA
MIN TYP MAX UNITS
63
pF
1
pF
VDD
- 0.5
0.4
V
V
Input Logic Low
Input Logic High
Leakage Current
Port 0 Interrupt Minimum Pulse
Width
V_IL
3.0V < VDD < 3.6V
VIH
3.0V < VDD < 3.6V
IL
I/O = high impedance
3.0V < VDD < 3.6V
0.8
V
2.4
V
0.01
1
FA
20
ns
HIGH-VOLTAGE OPEN-DRAIN OUTPUTS (OUT1, OUT2)
Output Logic Low
VOL2 ISINK = 2mA
Leakage Current
IL
VOUT1 = VOUT2 = 25V
MICROCONTROLLER
Flash Program Memory Size
16 bits wide
Program Memory Clear Time
tCPM
Page Write Time
tW
Maximum Flash Erase/Write
Cycles
n_CYC
0.5
V
1
FA
2k
38
10
100k
Words
ms
ms
Cycles
SRAM Size
128
Bytes
CPU Clock Frequency
fCPU
1.25
MHz
INTERNAL OSCILLATOR
Oscillator Frequency
Master oscillator
RC oscillator
19.8 20.48 21.2
31.7
32
32.2
MHz
kHz
VOLTAGE REGULATOR
Input Voltage
VBATT
5
14
28
V
Maximum Dropout Voltage
VDROP IAA = 10mA
0.6
V
Quiescent Current
IQ
8
FA
Output Voltage
VAA
5V < VBATT < 28V, 0 < IAA < 10mA
3.2
3.4
3.6
V
Note 2: All units are production tested at TA = +25NC and TA = +105NC. Limits over the operating temperature range are guaran-
teed by design and characterization.
Note 3: Measured indirectly by testing the excitation signal frequency. The excitation signal frequency is determined by the master
oscillator frequency, which in turn determines the sample time.
3