AD7755 Ver la hoja de datos (PDF) - Analog Devices
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componentes Descripción
Fabricante
AD7755 Datasheet PDF : 16 Pages
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AD7755–SPECIFICATIONS (AVDD = DVDD = 5 V ؎ 5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz,
TMIN to TMAX = –40؇C to +85؇C)
Parameter
ACCURACY1, 2
Measurement Error1 on Channel 1
Gain = 1
Gain = 2
Gain = 8
Gain = 16
Phase Error1 Between Channels
V1 Phase Lead 37°
(PF = 0.8 Capacitive)
V1 Phase Lag 60°
(PF = 0.5 Inductive)
AC Power Supply Rejection1
Output Frequency Variation (CF)
DC Power Supply Rejection1
Output Frequency Variation (CF)
ANALOG INPUTS
Maximum Signal Levels
Input Impedance (DC)
Bandwidth (–3 dB)
ADC Offset Error1, 2
Gain Error1
Gain Error Match1
A Version B Version Unit
Test Conditions/Comments
Channel 2 with Full-Scale Signal (± 660 mV), 25°C
0.1
0.1
% Reading typ Over a Dynamic Range 500 to 1
0.1
0.1
% Reading typ Over a Dynamic Range 500 to 1
0.1
0.1
% Reading typ Over a Dynamic Range 500 to 1
0.1
0.1
% Reading typ Over a Dynamic Range 500 to 1
Line Frequency = 45 Hz to 65 Hz
± 0.1
± 0.1
Degrees(°) max AC/DC = 0 and AC/DC = 1
± 0.1
± 0.1
Degrees(°) max AC/DC = 0 and AC/DC = 1
AC/DC = 1, S0 = S1 = 1, G0 = G1 = 0
0.2
0.2
% Reading typ V1 = 100 mV rms, V2 = 100 mV rms, @ 50 Hz
Ripple on AVDD of 200 mV rms @ 100 Hz
AC/DC = 1, S0 = S1 = 1, G0 = G1 = 0
± 0.3
± 0.3
% Reading typ V1 = 100 mV rms, V2 = 100 mV rms,
AVDD = DVDD = 5 V ± 250 mV
See Analog Inputs Section
±1
±1
V max
V1P, V1N, V2N and V2P to AGND
390
390
kΩ min
CLKIN = 3.58 MHz
14
14
kHz typ
CLKIN/256, CLKIN = 3.58 MHz
± 25
± 25
mV max
Gain = 1, See Terminology and Performance Graphs
±7
±7
% Ideal typ External 2.5 V Reference, Gain = 1
V1 = 470 mV dc, V2 = 660 mV dc
± 0.2
± 0.2
% Ideal typ External 2.5 V Reference
REFERENCE INPUT
REFIN/OUT Input Voltage Range
2.7
2.7
V max
2.3
2.3
V min
2.5 V + 8%
2.5 V – 8%
Input Impedance
3.2
3.2
kΩ min
Input Capacitance
10
10
pF max
ON-CHIP REFERENCE
Reference Error
Temperature Coefficient
± 200
± 30
± 200
± 30
± 60
mV max
ppm/°C typ
ppm/°C max
Nominal 2.5 V
CLKIN
Input Clock Frequency
LOGIC INPUTS3
SCF, S0, S1, AC/DC,
RESET, G0 and G1
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN
LOGIC OUTPUTS3
F1 and F2
Output High Voltage, VOH
Output Low Voltage, VOL
CF and REVP
Output High Voltage, VOH
Output Low Voltage, VOL
Note All Specifications for CLKIN of 3.58 MHz
4
4
MHz max
1
1
MHz min
2.4
2.4
V min
DVDD = 5 V ± 5%
0.8
0.8
V max
DVDD = 5 V ± 5%
±3
±3
µA max
Typically 10 nA, VIN = 0 V to DVDD
10
10
pF max
4.5
4.5
V min
0.5
0.5
V max
4
4
V min
0.5
0.5
V max
ISOURCE = 10 mA
DVDD = 5 V
ISINK = 10 mA
DVDD = 5 V
ISOURCE = 5 mA
DVDD = 5 V
ISINK = 5 mA
DVDD = 5 V
–2–
REV. B
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