(V
+3 V or 5 V, REF
V and
AD7705/AD7706–SPECIFICATIONS
noted.= All specificationsIN(+)to=T+1.225 V with V = 3noted.)+2.5 V
with V = 5 V; REF IN(–) = GND; MCLK IN = 2.4576 MHz unless otherwise
T
unless otherwise
DD
DD
DD
MIN
MAX
Parameter
STATIC PERFORMANCE
No Missing Codes
Output Noise
Integral Nonlinearity
2
Unipolar Offset Error
Unipolar Offset Drift
4
Bipolar Zero Error
Bipolar Zero Drift
4
Positive Full-Scale Error
5
Full-Scale Drift
4, 6
Gain Error
7
Gain Drift
4, 8
Bipolar Negative Full-Scale Error
2
Bipolar Negative Full-Scale Drift
4
ANALOG INPUTS/REFERENCE INPUTS
Input Common-Mode Rejection (CMR)
2
V
DD
= 5 V
Gain = 1
Gain = 2
Gain = 4
Gain = 8v128
V
DD
= 3 V
Gain = 1
Gain = 2
Gain = 4
Gain = 8v128
Normal-Mode 50 Hz Rejection
2
Normal-Mode 60 Hz Rejection
2
Common-Mode 50 Hz Rejection
2
Common-Mode 60 Hz Rejection
2
Absolute/Common-Mode REF IN Voltage
2
Absolute/Common-Mode AIN Voltage
2, 9
Absolute/Common-Mode AIN Voltage
2, 9
AIN DC Input Current
2
AIN Sampling Capacitance
2
AIN Differential Voltage Range
10
AIN Input Sampling Rate, f
S
Reference Input Range
REF IN(+) – REF IN(–) Voltage
REF IN(+) – REF IN(–) Voltage
REF IN Input Sampling Rate, f
S
LOGIC INPUTS
Input Current
All Inputs Except MCLK IN
MCLK
All Inputs Except SCLK and MCLK IN
V
INL
, Input Low Voltage
V
INH
, Input High Voltage
SCLK Only (Schmitt Triggered Input)
V
T+
V
T–
V
T+
– V
T–
SCLK Only (Schmitt Triggered Input)
V
T+
V
T–
V
T+
– V
T–
MCLK IN Only
V
INL
, Input Low Voltage
V
INH
, Input High Voltage
MCLK IN Only
V
INL
, Input Low Voltage
V
INH
, Input High Voltage
B Version
1
16
See Tables I and III
±
0.003
See Note 3
0.5
See Note 3
0.5
0.1
See Note 3
0.5
See Note 3
0.5
±
0.003
1
0.6
Units
Bits min
% of FSR max
µV/°C
typ
µV/°C
typ
µV/°C
typ
µV/°C
typ
ppm of FSR/°C typ
% of FSR typ
µV/°C
typ
µV/°C
typ
Conditions/Comments
Guaranteed by Design. Filter Notch < 60 Hz
Depends on Filter Cutoffs and Selected Gain
Filter Notch < 60 Hz. Typically
±
0.0003%
For Gains 1, 2 and 4
For Gains 8, 16, 32, 64 and 128
Typically
±
0.001%
For Gains of 1 to 4
For Gains of 8 to 128
Specifications for AIN and REF IN Unless Noted
96
105
110
130
105
110
120
130
98
98
150
150
GND to V
DD
GND – 30 mV
V
DD
+ 30 mV
GND + 50 mV
V
DD
– 1.5 V
1
10
0 to +V
REF
/GAIN
11
±
V
REF
/GAIN
GAIN
×
f
CLKIN
/64
f
CLKIN
/8
1/1.75
1/3.5
f
CLKIN
/64
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
dB typ
V min to V max
V min
V max
V min
V max
nA max
pF max
nom
nom
For Filter Notches of 25 Hz, 50 Hz,
±
0.02
×
f
NOTCH
For Filter Notches of 20 Hz, 60 Hz,
±
0.02
×
f
NOTCH
For Filter Notches of 25 Hz, 50 Hz,
±
0.02
×
f
NOTCH
For Filter Notches of 20 Hz, 60 Hz,
±
0.02
×
f
NOTCH
BUF Bit of Setup Register = 0
BUF Bit of Setup Register = 1
Unipolar Input Range (B/U Bit of Setup Register = 1)
Bipolar Input Range (B/U Bit of Setup Register = 0)
For Gains of 1 to 4
For Gains of 8 to 128
V
DD
= 2.7 V to 3.3 V. V
REF
= 1.225
±
1% for Specified
Performance
V
DD
= 4.75 V to 5.25 V. V
REF
= 2.5
±
1% for Specified
Performance
V min/max
V min/max
±
1
±
10
0.8
0.4
2.0
1.4/3
0.8/1.4
0.4/0.8
1/2.5
0.4/1.1
0.375/0.8
0.8
3.5
0.4
2.5
µA
max
µA
max
V max
V max
V min
V min/V max
V min/V max
V min/V max
Typically
±
20 nA
Typically
±
2
µA
V
DD
= 5 V
V
DD
= 3 V
V
DD
= 3 V and 5 V
V
DD
= 5 V NOMINAL
V
DD
= 3 V NOMINAL
V min/V max
V min/V max
V min/V max
V
DD
= 5 V NOMINAL
V max
V min
V
DD
= 3 V NOMINAL
V max
V min
–2–
REV. A
AD [ ANALOG DEVICES ]
