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