Datasheet

Parameter A Versions
1
Units Conditions/Comments
STATIC PERFORMANCE
No Missing Codes 24 Bits min Guaranteed by Design. Bipolar Mode. For Filter Notches ≤ 60 Hz
22 Bits min For Filter Notch = 100 Hz
18 Bits min For Filter Notch = 250 Hz
15 Bits min For Filter Notch = 500 Hz
12 Bits min For Filter Notch = 1 kHz
Output Noise See Tables I to IV Depends on Filter Cutoffs and Selected Gain
Integral Nonlinearity ±0.0015 % of FSR max Filter Notches ≤ 60 Hz
Unipolar Offset Error See Note 2
Unipolar Offset Drift
3
0.5 µV/°C typ For Gains of 1, 2, 4
0.3 µV/°C typ For Gains of 8, 16, 32, 64, 128
Bipolar Zero Error See Note 2
Bipolar Zero Drift
3
0.5 µV/°C typ For Gains of 1, 2, 4
0.3 µV/°C typ For Gains of 8, 16, 32, 64, 128
Positive Full-Scale Error
4
See Note 2
Full-Scale Drift
3, 5
0.5 µV/°C typ For Gains of 1, 2, 4
0.3 µV/°C typ For Gains of 8, 16, 32, 64, 128
Gain Error
6
See Note 2
Gain Drift
3, 7
0.5 ppm of FSR/°C typ
Bipolar Negative Full-Scale Error ±0.0015 % of FSR max Typically ±0.0004%
Bipolar Negative Full-Scale Drift
3
1 µV/°C typ For Gains of 1, 2, 4
0.6 µV/°C typ For Gains of 8, 16, 32, 64, 128
ANALOG INPUTS/REFERENCE INPUTS Specifications for AIN and REF IN Unless Noted
Input Common-Mode Rejection (CMR) 90 dB min At DC. Typically 102 dB
Normal-Mode 50 Hz Rejection
8
100 dB min For Filter Notches of 10 Hz , 25 Hz , 50 Hz, ±0.02 × f
NOTCH
Normal-Mode 60 Hz Rejection
8
100 dB min For Filter Notches of 10 Hz , 30 Hz , 60 Hz, ±0.02 × f
NOTCH
Common-Mode 50 Hz Rejection
8
150 dB min For Filter Notches of 10 Hz , 25 Hz , 50 Hz, ±0.02 × f
NOTCH
Common-Mode 60 Hz Rejection
8
150 dB min For Filter Notches of 10 Hz , 30 Hz , 60 Hz, ±0.02 × f
NOTCH
Common-Mode Voltage Range
9
AGND to AV
DD
V min to V max AIN for BUFFER = 0 and REF IN
Absolute AIN/REF IN Voltage
9
AGND – 30 mV V min AIN for BUFFER = 0 and REF IN
AV
DD
+ 30 mV V max
Absolute/Common-Mode AIN Voltage
9
AGND + 50 mV V min BUFFER = 1. A Version
AV
DD
– 1.5 V V max
AIN Input Current
8
1 nA max A Version
AIN Sampling Capacitance
8
7 pF max
AIN Differential Voltage Range
10
0 to +V
REF
/GAIN
11
nom Unipolar Input Range (B/U Bit of Filter High Register = 1)
±V
REF
/GAIN nom Bipolar Input Range (B/U Bit of Filter High Register = 0)
AIN Input Sampling Rate, f
S
GAIN × f
CLK␣ IN
/64 For Gains of 1, 2, 4
f
CLK␣ IN
/8 For Gains of 8, 16, 32, 64, 128
REF IN(+) – REF IN(–) Voltage +2.5 V nom ±1% for Specified Performance. Functional with Lower V
REF
REF IN Input Sampling Rate, f
S
f
CLK IN
/64
LOGIC INPUTS
Input Current ±10 µA max
All Inputs Except MCLK IN
V
INL
, Input Low Voltage 0.8 V max DV
DD
= +5 V
V
INL
, Input Low Voltage 0.4 V max DV
DD
= +3.3␣ V
V
INH
, Input High Voltage 2.4 V min DV
DD
= +5 V
V
INH
, Input High Voltage 2.0 V min DV
DD
= +3.3 V
MCLK IN Only
V
INL
, Input Low Voltage 0.8 V max DV
DD
= +5␣ V
V
INL
, Input Low Voltage 0.4 V max DV
DD
= +3.3␣ V
V
INH
, Input High Voltage 3.5 V min DV
DD
= +5␣ V
V
INH
, Input High Voltage 2.5 V min DV
DD
= +3.3␣ V
LOGIC OUTPUTS (Including MCLK OUT)
V
OL
, Output Low Voltage 0.4 V max I
SINK
= 800␣ µA Except for MCLK OUT.
12
DV
DD
= +5 V
V
OL
, Output Low Voltage 0.4 V max I
SINK
= 100␣ µA Except for MCLK OUT.
12
DV
DD
= +3.3 V
V
OH
, Output High Voltage 4.0 V min I
SOURCE
= 200 µA Except for MCLK OUT.
12
DV
DD
= +5␣ V
V
OH
, Output High Voltage DV
DD
– 0.6 V V min I
SOURCE
= 100 µA Except for MCLK OUT.
12
DV
DD
= +3.3␣ V
Floating State Leakage Current ±10 µA max
Floating State Output Capacitance
13
9 pF typ
Data Output Coding Binary Unipolar Mode
Offset Binary Bipolar Mode
NOTES
1
Temperature range is as follows: A Versions: –40°C to +85°C.
2
A calibration is effectively a conversion so these errors will be of the order of the conversion noise shown in Tables I to IV. This applies after calibration at the temperature of interest.
3
Recalibration at any temperature will remove these drift errors.
4
Positive Full-Scale Error includes Zero-Scale Errors (Unipolar Offset Error or Bipolar Zero Error) and applies to both unipolar and bipolar input ranges.
5
Full-Scale Drift includes Zero-Scale Drift (Unipolar Offset Drift or Bipolar Zero Drift) and applies to both unipolar and bipolar input ranges.
6
Gain Error does not include Zero-Scale Errors. It is calculated as Full-Scale Error—Unipolar Offset Error for unipolar ranges and Full-Scale Error—Bipolar Zero Error for
bipolar ranges.
AD7714-5–SPECIFICATIONS
(AV
DD
= +5␣ V, DV
DD
= +3.3␣ V or +5␣ V, REF IN(+) = +2.5␣ V; REF␣ IN(–) = AGND;
f
CLK IN
= 2.4576␣ MHz unless otherwise noted. All specifications T
MIN
to T
MAX
unless otherwise noted.)
REV. C
–2–