AD7889 Analog Devices, AD7889 Datasheet - Page 11

• 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

Figure 20. Typical FFT Plot for the Auxiliary Channels at 25 kHz Sampling
1400
1200
1000
–100
–120
–140
–160
800
600
400
200
–20
–40
–60
–80
0
0
2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
Figure 19. Temperature Code vs. V
Rate and 1 kHz Input Frequency
SNR = 61.58dB
THD = 72.34dB
FREQUENCY (Hz)
V
CC
(V)
CC
for 25°C
Rev. C | Page 11 of 40
Figure 21. Typical Uncalibrated Accuracy for the Battery Channel (25°C)
250
200
150
100
50
0
–4
–3
ERROR (%)
–2
AD7879/AD7889
–1
MEAN: –1.98893
SD: 0.475534
0