AD7730L_98 데이터 시트보기 (PDF) - Analog Devices

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AD7730L_98

Bridge Transducer ADC

Analog Devices 

AD7730–SPECIFICATIONS (AVDD = +5 V, DVDD = +3 V or +5 V; REF IN(+) = AVDD; REF IN(–) = AGND = DGND =

0 V; fCLK IN = 4.9152 MHz. All specifications TMIN to TMAX unless otherwise noted.)

Parameter

B Version1

Units

Conditions/Comments

STATIC PERFORMANCE (CHP = 1)

No Missing Codes2

Output Noise and Update Rates2

Integral Nonlinearity

Offset Error2

Offset Drift vs. Temperature2

Offset Drift vs. Time4

Positive Full-Scale Error2, 5

Positive Full-Scale Drift vs Temp2, 6, 7

Positive Full-Scale Drift vs Time4

Gain Error2, 8

Gain Drift vs. Temperature2, 6, 9

Gain Drift vs. Time4

Bipolar Negative Full-Scale Error2

Negative Full-Scale Drift vs. Temp2, 6

Power Supply Rejection

Common-Mode Rejection (CMR)

Analog Input DC Bias Current2

Analog Input DC Bias Current Drift2

Analog Input DC Offset Current2

Analog Input DC Offset Current Drift2

24

See Tables I & II

18

See Note 3

5

25

See Note 3

2

10

See Note 3

2

10

See Note 3

2

120

120

50

100

10

50

Bits min

ppm of FSR max

nV/°C typ

nV/1000 Hours typ

ppm of FS/°C max

ppm of FS/1000 Hours typ

ppm/°C max

ppm/1000 Hours typ

ppm of FS/°C max

dB typ

dB min

nA max

pA/°C typ

nA max

pA/°C typ

STATIC PERFORMANCE (CHP = 0)2

No Missing Codes

Output Noise and Update Rates

Integral Nonlinearity

Offset Error

Offset Drift vs. Temperature6

Offset Drift vs. Time4

Positive Full-Scale Error5

Positive Full-Scale Drift vs. Temp6, 7

Positive Full-Scale Drift vs. Time4

Gain Error8

Gain Drift vs. Temperature6, 9

Gain Drift vs. Time4

Bipolar Negative Full-Scale Error

Negative Full-Scale Drift vs. Temp

Power Supply Rejection

Common-Mode Rejection (CMR) on AIN

CMR on REF IN

Analog Input DC Bias Current

Analog Input DC Bias Current Drift

Analog Input DC Offset Current

Analog Input DC Offset Current Drift

24

See Tables III & IV

18

See Note 3

0.5

2.5

See Note 3

0.6

3

See Note 3

2

10

See Note 3

0.6

90

100

120

60

150

30

100

Bits min

ppm of FSR max

µV/°C typ

µV/1000 Hours typ

µV/°C typ

µV/1000 Hours typ

ppm/°C typ

ppm/1000 Hours typ

µV/°C typ

dB typ

dB typ

dB typ

nA max

pA/°C typ

nA max

pA/°C typ

ANALOG INPUTS/REFERENCE INPUTS

Normal-Mode 50 Hz Rejection2

88

Normal-Mode 60 Hz Rejection2

88

Common-Mode 50 Hz Rejection2

120

Common-Mode 60 Hz Rejection2

120

Analog Inputs

Differential Input Voltage Ranges11

dB min

dB min

dB min

dB min

Absolute/Common-Mode Voltage12

Reference Input

REF IN(+) – REF IN(–) Voltage

REF IN(+) – REF IN(–) Voltage

Absolute/Common-Mode Voltage13

NO REF Trigger Voltage

0 to +10 or ± 10

0 to +20 or ± 20

0 to +40 or ± 40

0 to +80 or ± 80

AGND + 1.2 V

AVDD – 0.95 V

+2.5

+5

AGND – 30 mV

AVDD + 30 mV

0.3

0.65

mV nom

mV nom

mV nom

mV nom

V min

V max

V nom

V nom

V min

V max

V min

V max

Offset Error and Offset Drift Refer to Both

Unipolar Offset and Bipolar Zero Errors

Measured with Zero Differential Voltage

At DC. Measured with Zero Differential Voltage

SKIP = 010

Offset Error and Offset Drift Refer to Both

Unipolar Offset and Bipolar Zero Errors

Measured with Zero Differential Voltage

At DC. Measured with Zero Differential Voltage

At DC. Measured with Zero Differential Voltage

From 49 Hz to 51 Hz

From 59 Hz to 61 Hz

From 49 Hz to 51 Hz

From 59 Hz to 61 Hz

Assuming 2.5 V or 5 V Reference with

HIREF Bit Set Appropriately

Gain = 250

Gain = 125

Gain = 62.5

Gain = 31.25

HIREF Bit of Mode Register = 0

HIREF Bit of Mode Register = 1

NO REF Bit Active If VREF Below This Voltage

NO REF Bit Inactive If VREF Above This Voltage

–2–

REV. A

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