AD7889 Analog Devices, AD7889 Datasheet - Page 25

• Manufacturer Part Number: AD7889
• Description: Low Voltage Controller for Touch Screens
• Manufacturer: Analog Devices

Specifications of AD7889

• Resolution (bits): 12bit
• # Chan: 6
• Sample Rate: 105kSPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: CSP

Table 16. Measurement Result Registers (Read Only)
Address
0x08
0x09
0x0A
0x0B
0x0C
0x0D
Table 17. Revision and Device ID Register (Read Only)
Address
0x0E
Register Name
X+
Y+
X+ (Z1)
Y− (Z2)
AUX/VBAT
TEMP
Data Bits
[15:12]
[11:8]
[7:0]
Data Bits
[15:0]
[15:0]
[15:0]
[15:0]
[15:0]
[15:0]
Description
Measured Y+ input with X excitation (X position)
Measured X+ input with X − and Y+ excitation (touch -pressure calculation Z1)
Measured Y − input with X− and Y+ excitation (touch-pressure calculation Z2)
AUX/VBAT voltage measurement
Temperature conversion measurement
Measured X+ input with Y excitation (Y position)
Description
Unused
Revision and device ID bits
Device ID
Rev. C | Page 25 of 40
Default Value
0x0379 (AD7879-1/AD7889-1)
0x037A (AD7879/AD7889)
AD7879/AD7889
Default Value
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000