AD7755–SPECIFICATIONS
Parameter
ACCURACY
1, 2
Measurement Error
1
on Channel 1
Gain = 1
Gain = 2
Gain = 8
Gain = 16
Phase Error
1
Between Channels
V1 Phase Lead 37°
(PF = 0.8 Capacitive)
V1 Phase Lag 60°
(PF = 0.5 Inductive)
AC Power Supply Rejection
1
Output Frequency Variation (CF)
DC Power Supply Rejection
1
Output Frequency Variation (CF)
ANALOG INPUTS
Maximum Signal Levels
Input Impedance (DC)
Bandwidth (–3 dB)
ADC Offset Error
1, 2
Gain Error
1
Gain Error Match
1
REFERENCE INPUT
REF
IN/OUT
Input Voltage Range
Input Impedance
Input Capacitance
ON-CHIP REFERENCE
Reference Error
Temperature Coefficient
CLKIN
Input Clock Frequency
LOGIC INPUTS
3
SCF, S0, S1, AC/DC,
RESET,
G0 and G1
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN
LOGIC OUTPUTS
3
F1 and F2
Output High Voltage, V
OH
4.5
Output Low Voltage, V
OL
0.5
CF and REVP
Output High Voltage, V
OH
4
Output Low Voltage, V
OL
0.5
0.1
0.1
0.1
0.1
(AV
DD
= DV
DD
= 5 V 5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz,
T
MIN
to T
MAX
= –40 C to +85 C)
Test Conditions/Comments
Channel 2 with Full-Scale Signal (± 660 mV), 25°C
Over a Dynamic Range 500 to 1
Over a Dynamic Range 500 to 1
Over a Dynamic Range 500 to 1
Over a Dynamic Range 500 to 1
Line Frequency = 45 Hz to 65 Hz
A Version B Version Unit
0.1
0.1
0.1
0.1
% Reading typ
% Reading typ
% Reading typ
% Reading typ
±
0.1
±
0.1
0.2
±
0.1
±
0.1
0.2
Degrees(°) max AC/DC = 0 and AC/DC = 1
Degrees(°) max AC/DC = 0 and AC/DC = 1
AC/DC = 1, S0 = S1 = 1, G0 = G1 = 0
% Reading typ V1 = 100 mV rms, V2 = 100 mV rms, @ 50 Hz
Ripple on AV
DD
of 200 mV rms @ 100 Hz
AC/DC = 1, S0 = S1 = 1, G0 = G1 = 0
% Reading typ V1 = 100 mV rms, V2 = 100 mV rms,
AV
DD
= DV
DD
= 5 V
±
250 mV
V max
kΩ min
kHz typ
mV max
% Ideal typ
% Ideal typ
V max
V min
kΩ min
pF max
mV max
ppm/°C typ
ppm/°C max
Note All Specifications for CLKIN of 3.58 MHz
MHz max
MHz min
See Analog Inputs Section
V1P, V1N, V2N and V2P to AGND
CLKIN = 3.58 MHz
CLKIN/256, CLKIN = 3.58 MHz
Gain = 1, See Terminology and Performance Graphs
External 2.5 V Reference, Gain = 1
V1 = 470 mV dc, V2 = 660 mV dc
External 2.5 V Reference
2.5 V + 8%
2.5 V – 8%
±
0.3
±
0.3
±
1
390
14
±
25
±
7
±
0.2
2.7
2.3
3.2
10
±
200
±
30
±
1
390
14
±
25
±
7
±
0.2
2.7
2.3
3.2
10
±
200
±
30
±
60
4
1
Nominal 2.5 V
4
1
2.4
0.8
±
3
10
2.4
0.8
±
3
10
V min
V max
µA
max
pF max
DV
DD
= 5 V
±
5%
DV
DD
= 5 V
±
5%
Typically 10 nA, V
IN
= 0 V to DV
DD
4.5
0.5
V min
V max
I
SOURCE
= 10 mA
DV
DD
= 5 V
I
SINK
= 10 mA
DV
DD
= 5 V
I
SOURCE
= 5 mA
DV
DD
= 5 V
I
SINK
= 5 mA
DV
DD
= 5 V
4
0.5
V min
V max
–2–
REV. B
AD [ ANALOG DEVICES ]
