AD7843ARU Analog Devices Inc, AD7843ARU Datasheet - Page 9

• Manufacturer Part Number: AD7843ARU
• Description: IC ADC 12BIT TOUCHSCREEN 16TSSOP
• Manufacturer: Analog Devices Inc
• Type: Resistiver

Specifications of AD7843ARU

• Touch Panel Interface: 4-Wire
• Number Of Inputs/keys: 1 TSC
• Resolution (bits): 12 b
• Data Interface: Serial
• Data Rate/sampling Rate (sps, Bps): 125k
• Voltage Reference: External
• Voltage - Supply: 2.2 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Voltage Supply Source: Single Supply
• Sampling Rate (per Second): 125k
• For Use With: EVAL-AD7843EBZ - BOARD EVAL FOR AD7843
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
7.5
6.5
5.5
4.5
3.5
2.5
1.5
0.5
10
9
8
7
6
5
4
0
2.0
10
15
Y+
35
25
Figure 10. Reference Current vs. Sample Rate
2.5
Figure 12. Maximum Sampling Rate vs. R
X–
X+
Figure 11. Switch-On Resistance vs. +V
(X+, Y+: +V
55
40
INL: R = 500 Ω
3.0
DNL: R = 2k Ω
Y–
SAMPLING RATE (kSPS)
75
SAMPLE RATE (kHz)
CC
55
DNL: R = 500 Ω
to Pin; X−, Y−: Pin to GND)
3.5
95
+V
CC
70
(V)
115
4.0
85
135
INL: R = 2k Ω
4.5
100
155
CC
5.0
115
IN
175
130
195
5.5
Rev. B | Page 9 of 20
100
120
14
13
12
11
10
20
40
60
80
9
8
7
6
5
4
3
0
9
8
7
6
5
4
3
2
–40
–40
0
Figure 15. Auxiliary Channel Dynamic Performance
Figure 14. Switch-On Resistance vs. Temperature
7.5
–20
Figure 13. Reference Current vs. Temperature
–20
(X+, Y+:+V
15.0
(f
SAMPLE
0
0
Y–
22.5
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (kHz)
=125 kHz, f
CC
to Pin; X−, Y−: Pin to GND)
20
30.0
20
Y+
INPUT
40
37.5
= 15 kHz)
40
X–
f
f
SNR = 68.34dB
SAMPLE
IN
60
45.0
= 15kHz
60
= 125kHz
X+
52.5
80
AD7843
60.0
80
100