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AD7787BRM-REEL Arkusz danych(PDF) 5 Page - Analog Devices

Numer części AD7787BRM-REEL
Szczegółowy opis  Low Power, 2-Channel 24-Bit Sigma-Delta ADC
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD7787BRM-REEL Arkusz danych(HTML) 5 Page - Analog Devices

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AD7787
Data Sheet
Rev. A | Page 4 of 20
Parameter
AD7787B
Unit
Test Conditions/Comments
LOGIC INPUTS
All Inputs Except SCLK1
VINL, Input Low Voltage
0.8
V max
VDD = 5 V.
0.4
V max
VDD = 3 V.
VINH, Input High Voltage
2.0
V min
VDD = 3 V or 5 V.
SCLK Only (Schmitt-Triggered Input)1
VT(+)
1.4/2
V min/V max
VDD = 5 V.
VT(−)
0.8/1.4
V min/V max
VDD = 5 V.
VT(+) − VT(−)
0.3/0.85
V min/V max
VDD = 5 V.
VT(+)
0.9/2
V min/V max
VDD = 3 V.
VT(−)
0.4/1.1
V min/V max
VDD = 3 V.
VT(+) − VT(−)
0.3/0.85
V min/V max
VDD = 3 V.
Input Currents
±1
µA max
VIN = VDD or GND.
Input Capacitance
10
pF typ
All Digital Inputs.
LOGIC OUTPUTS
VOH, Output High Voltage1
VDD − 0.6
V min
VDD = 3 V, ISOURCE = 100 µA.
VOL, Output Low Voltage1
0.4
V max
VDD = 3 V, ISINK = 100 µA.
VOH, Output High Voltage1
4
V min
VDD = 5 V, ISOURCE = 200 µA.
VOL, Output Low Voltage1
0.4
V max
VDD = 5 V, ISINK = 1.6 mA.
Floating-State Leakage Current
±1
µA max
Floating-State Output Capacitance
10
pF typ
Data Output Coding
Offset Binary
POWER REQUIREMENTS5
Power Supply Voltage
VDD − GND
2.5/5.25
V min/max
Power Supply Currents
IDD Current6
75
µA max
65 µA typ, VDD = 3.6 V, unbuffered mode.
145
µA max
130 µA typ, VDD = 3.6 V, buffered mode.
80
µA max
73 µA typ, VDD = 5.25 V, unbuffered mode.
160
µA max
145 µA typ, VDD = 5.25 V, buffered mode.
IDD (Power-Down Mode)
1
µA max
1
Specification is not production tested but is supported by characterization data at initial product release.
2
Full-scale error applies to both positive and negative full scale and applies at the factory calibration conditions (VDD = 4 V).
3
The AD7787 can tolerate absolute analog input voltages down to GND − 200 mV but the leakage current will increase.
4
FS[2:0] are the three bits used in the filter register to select the output word rate.
5
Digital inputs equal to VDD or GND.
6
The current consumption can be further reduced by using the ADC in one of the low power modes (see Table 14).


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