AD7787 Ver la hoja de datos (PDF) - Analog Devices
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AD7787 Datasheet PDF : 20 Pages
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AD7787
Parameter
LOGIC INPUTS
All Inputs Except SCLK1
VINL, Input Low Voltage
VINH, Input High Voltage
SCLK Only (Schmitt-Triggered Input)1
VT(+)
VT(−)
VT(+) − VT(−)
VT(+)
VT(−)
VT(+) − VT(−)
Input Currents
Input Capacitance
LOGIC OUTPUTS
VOH, Output High Voltage1
VOL, Output Low Voltage1
VOH, Output High Voltage1
VOL, Output Low Voltage1
Floating-State Leakage Current
Floating-State Output Capacitance
Data Output Coding
POWER REQUIREMENTS5
Power Supply Voltage
VDD − GND
Power Supply Currents
IDD Current6
IDD (Power-Down Mode)
AD7787B
0.8
0.4
2.0
1.4/2
0.8/1.4
0.3/0.85
0.9/2
0.4/1.1
0.3/0.85
±1
10
VDD − 0.6
0.4
4
0.4
±1
10
Offset Binary
2.5/5.25
75
145
80
160
1
Unit
V max
V max
V min
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
µA max
pF typ
V min
V max
V min
V max
µA max
pF typ
V min/max
µA max
µA max
µA max
µA max
µA max
Test Conditions/Comments
VDD = 5 V.
VDD = 3 V.
VDD = 3 V or 5 V.
VDD = 5 V.
VDD = 5 V.
VDD = 5 V.
VDD = 3 V.
VDD = 3 V.
VDD = 3 V.
VIN = VDD or GND.
All Digital Inputs.
VDD = 3 V, ISOURCE = 100 µA.
VDD = 3 V, ISINK = 100 µA.
VDD = 5 V, ISOURCE = 200 µA.
VDD = 5 V, ISINK = 1.6 mA.
65 µA typ, VDD = 3.6 V, unbuffered mode.
130 µA typ, VDD = 3.6 V, buffered mode.
73 µA typ, VDD = 5.25 V, unbuffered mode.
145 µA typ, VDD = 5.25 V, buffered mode.
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).
Rev. 0 | Page 4 of 20
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