mxb7846 Maxim Integrated Products, Inc., mxb7846 Datasheet - Page 6

• 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.

2.375V to 5.25V, 4-Wire Touch-Screen Controller
with Internal Reference and Temperature Sensor
(V
otherwise noted.)
6
DD
_______________________________________________________________________________________
2.6
2.5
2.4
2.3
2.2
2.1
2.0
8.3
8.2
8.1
8.0
7.9
7.8
7.7
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
= 2.7V, V
-40
-40
2.5
V
C
C
f
EXTERNAL REFERENCE
SAMPLE
DD
L
INTERNAL REFERENCE VOLTAGE
L
-25
-25
= 0.1µF
= 0.1µF
= 2.7V
3.0
-10
TEMP DIODE VOLTAGE
-10
REF
= 125kHz
REFERENCE CURRENT
vs. SUPPLY VOLTAGE
vs. TEMPERATURE
vs. TEMPERATURE
SUPPLY VOLTAGE (V)
TEMP2
TEMPERATURE (°C)
TEMPERATURE (°C)
3.5
= 2.5V
5
5
20
20
4.0
EXTERNAL
TEMP1
35
35
4.5
50
50
5.0
65
65
, f
DCLK
80
80
5.5
= 2MHz, f
590
589
588
587
586
585
Typical Operating Characteristics (continued)
2.5
2.0
1.5
1.0
0.5
8.3
8.2
8.1
8.0
7.9
7.8
7.7
0
REFERENCE CURRENT vs. TEMPERATURE
-40
2.7
0
SAMPLE
V
C
f
EXTERNAL REFERENCE
SAMPLE
DD
L
INTERNAL VOLTAGE REFERENCE
-25
= 0.1µF
200
= 2.7V
3.2
TEMP0 DIODE VOLTAGE
TEMP0
= 125kHz
-10
vs. SUPPLY VOLTAGE
vs. TURN-ON TIME
= 125kHz, C
400
SUPPLY VOLTAGE (V)
TURN-ON TIME (µs)
TEMPERATURE (°C)
3.7
5
(1060µs) 12-BIT SETTLING
600
20
4.2
800
35
LOAD
4.7
50
1000
C
L
65
= 1µF
= 50pF, 0.1µF capacitor at REF, T
5.2
1200
80
705
704
703
702
701
700
699
698
3.0
2.5
2.0
1.5
1.0
0.5
10
0
9
8
7
6
5
4
3
2
1
0
2.7
REFERENCE CURRENT vs. SAMPLE RATE
0
0
EXTERNAL REFERENCE
INTERNAL VOLTAGE REFERENCE
5
3.2
25
TEMP1 DIODE VOLTAGE
vs. SUPPLY VOLTAGE
10
vs. TURN-ON TIME
SUPPLY VOLTAGE (V)
TURN-ON TIME (µs)
SAMPLE RATE (kHz)
3.7
15
50
TEMP1
(30µs) 12-BIT SETTLING
20
A
4.2
= +25°C, unless
75
25
NO CAPACITOR
4.7
30
100
35
5.2
125
40