Datasheet

–3–
AD7730/AD7730L
Parameter B Version
1
Units Conditions/Comments
LOGIC INPUTS
Input Current ± 10 μA max
All Inputs Except SCLK and 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 V
V
INH
, Input High Voltage 2.0 V min
SCLK Only (Schmitt Triggered Input)
V
T+
1.4/3 V min to V max DV
DD
= +5 V
V
T+
1/2.5 V min to V max DV
DD
= +3 V
V
T–
0.8/1.4 V min to V max DV
DD
= +5 V
V
T–
0.4/1.1 V min to V max DV
DD
= +3 V
V
T+
– V
T–
0.4/0.8 V min to V max DV
DD
= +5 V
V
T+
– V
T–
0.4/0.8 V min to V max DV
DD
= +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 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 V
LOGIC OUTPUTS (Including MCLK OUT)
V
OL
, Output Low Voltage I
SINK
= 800 μA Except for MCLK OUT
14
;
0.4 V max V
DD
15
= +5 V
V
OL
, Output Low Voltage I
SINK
= 100 μA Except for MCLK OUT
14
;
0.4 V max V
DD
15
= +3 V
V
OH
, Output High Voltage I
SOURCE
= 200 μA Except for MCLK OUT
14
;
4.0 V min V
DD
15
= +5 V
V
OH
, Output High Voltage I
SOURCE
= 100 μA Except for MCLK OUT
14
;
V
DD
– 0.6 V V min V
DD
15
= +3 V
Floating State Leakage Current ± 10 μA max
Floating State Output Capacitance
2
6 pF typ
TRANSDUCER BURNOUT
AIN1(+) Current –100 nA nom
AIN1(–) Current 100 nA nom
Initial Tolerance @ 25°C ± 10 % typ
Drift
2
0.1 %/°C typ
OFFSET (TARE) DAC
Resolution 6 Bit
LSB Size 2.3/2.6 mV min/mV max 2.5 mV Nominal with 5 V Reference (REF IN/2000)
DAC Drift
16
2.5 ppm/°C max
DAC Drift vs. Time
4, 16
25 ppm/1000 Hours typ
Differential Linearity –0.25/+0.75 LSB max Guaranteed Monotonic
SYSTEM CALIBRATION
Positive Full-Scale Calibration Limit
17
1.05 × FS V max FS Is the Nominal Full-Scale Voltage
(10 mV, 20 mV, 40 mV or 80 mV)
Negative Full-Scale Calibration Limit
17
–1.05 × FS V max
Offset Calibration Limit
18
–1.05 × FS V max
Input Span
17
0.8 × FS V min
2.1 × FS V max
POWER REQUIREMENTS
Power Supply Voltages
AV
DD
– AGND Voltage +4.75 to +5.25 V min to V max
DV
DD
Voltage +2.7 to +5.25 V min to V max With AGND = 0 V
Power Supply Currents External MCLK. Digital I/Ps = 0 V or DV
DD
AV
DD
Current (Normal Mode) 10.3 mA max All Input Ranges Except 0 mV to +10 mV and ± 10 mV
AV
DD
Current (Normal Mode) 22.3 mA max Input Ranges of 0 mV to +10 mV and ± 10 mV Only
DV
DD
Current (Normal Mode) 1.3 mA max DV
DD
of 2.7 V to 3.3 V
DV
DD
Current (Normal Mode) 2.7 mA max DV
DD
of 4.75 V to 5.25 V
AV
DD
+ DV
DD
Current (Standby Mode) 25 μA max Typically 10 μA. External MCLK IN = 0 V or DV
DD
Power Dissipation AV
DD
= DV
DD
= +5 V. Digital I/Ps = 0 V or DV
DD
Normal Mode 65 mW max All Input Ranges Except 0 mV to +10 mV and ± 10 mV
125 mW max Input Ranges of 0 mV to +10 mV and ± 10 mV Only
Standby Mode 125 μW max Typically 50 μW. External MCLK IN = 0 V or DV
DD
REV. B