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AD7877ACPZ-REEL7 数据表(PDF) 3 Page - Analog Devices

部件名 AD7877ACPZ-REEL7
功能描述  Touch Screen Controller
Download  44 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7877ACPZ-REEL7 数据表(HTML) 3 Page - Analog Devices

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AD7877
Rev. A | Page 3 of 44
SPECIFICATIONS
VCC = 2.7 V to 3.6 V, VREF = 2.5 V internal or external, fDCLK = 2 MHz, TA = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
ADC
DC ACCURACY
Resolution
12
Bits
No Missing Codes
11
12
Bits
Integral Nonlinearity1
±2
LSB
LSB size = 610 µV
Differential Nonlinearity1
−0.99/+2
LSB
LSB size = 610 µV
Offset Error1
±2
±6
LSB
VCC = 2.7 V
Gain Error1
±4
LSB
External reference
Noise
70
µV rms
Power Supply Rejection
70
dB
Internal Clock Ffrequency
2
MHz
SWITCH DRIVERS
On Resistance1
Y+, X+
14
Y−, X−
14
ANALOG INPUTS
Input Voltage Ranges
0
VREF
V
DC Leakage Current
±0.1
µA
Input Capacitance
30
pF
Accuracy
0.3
%
All channels, internal VREF
REFERENCE INPUT/OUTPUT
Internal Reference Voltage
2.44
2.55
V
Internal Reference Tempco
±50
ppm/°C
VREF Input Voltage Range
1
VCC
V
DC Leakage Current
±1
µA
VREF Input Impedance
1
GΩ
CS = GND or VCC; typically 25 Ω when on-board
reference enabled
TEMPERATURE MEASUREMENT
Temperature Range
−40
+85
°C
Resolution
Differential Method2
1.6
°C
Single Conversion Method3
0.3
°C
Accuracy
Differential Method2
±4
°C
Single Conversion Method3
±2
°C
Calibrated at 25°C
BATTERY MONITOR
Input Voltage Range
0.5
5
V
@VREF = 2.5 V
Input Impedance
14
kΩ
Sampling, 1 GΩ when battery monitor off
Accuracy
1
3.2
%
External/internal reference, see Figure 25


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