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AD7721 датащи(PDF) 2 Page - Analog Devices

номер детали AD7721
подробное описание детали  CMOS 16-Bit, 468.75 kHz, Sigma-Delta ADC
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7721 датащи(HTML) 2 Page - Analog Devices

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AD7721–SPECIFICATIONS1
Parameter
A Version
S Version
Units
Test Conditions/Comments
SERIAL MODE ONLY
STATIC PERFORMANCE
Resolution
16
16
Bits
Minimum Resolution for Which
12
12
Bits min
Guaranteed 12 Bits Monotonic
No Missing Codes Is Guaranteed
Differential Nonlinearity
±8
±8
LSB typ
Integral Nonlinearity
±16
±16
LSB max
16-Bit Operation
DC CMRR
70
70
dB min
Bipolar Mode
Offset Error
2
Unipolar Mode
±3.66
±3.66
mV max
Typically 0.61 mV
Bipolar Mode
±3.66
±3.66
mV max
Typically 0.61 mV
Full-Scale Error
2, 3
Unipolar Mode
±4.88
±4.88
mV max
Typically 0.61 mV
Bipolar Mode
±4.88
±4.88
mV max
Typically 1.22 mV
Unipolar Offset Drift
0.05
0.05
mV/
°C typ
Bipolar Offset Drift
0.04
0.04
mV/
°C typ
ANALOG INPUTS
Signal Input Span (VIN1–VIN2)
Bipolar Mode
±V
REFIN/2
±V
REFIN/2
Volts max
UNI = VIH
Unipolar Mode
0 to VREFIN
0 to VREFIN
Volts max
UNI = VIL
Maximum Input Voltage
AVDD
AVDD
Volts
Minimum Input Voltage
0
0
Volts
Input Sampling Capacitance
1.6
1.6
pF typ
Input Sampling Rate
2 fCLK
2 fCLK
MHz
Guaranteed by Design
Differential Input Impedance
20.8
20.8
k
Ω typ
With 15 MHz on CLK Pin
REFERENCE INPUTS
VREFIN
2.4 to 2.6
2.4 to 2.6
V min/V max
REFIN Input Current
200
200
µA typ
DYNAMIC SPECIFICATIONS
Signal to (Noise + Distortion)
74
74
dB min
Input Bandwidth 0 kHz to 210 kHz
Total Harmonic Distortion
–78
–78
dB max
Input Bandwidth 0 kHz to 229.2 kHz
Frequency Response
0 kHz–210 kHz
±0.05
±0.05
dB max
229.2 kHz
–3
–3
dB min
259.01 kHz to 14.74 MHz
–72
–72
dB min
CLOCK
CLK Duty Ratio
45 to 55
45 to 55
% max
For Specified Operation
VCLKH, CLK High Voltage
0.7
× DV
DD
0.7
× DV
DD
V min
CLK Uses CMOS Logic
VCLKL, CLK Low Voltage
0.3
× DV
DD
0.3
× DV
DD
V max
LOGIC INPUTS
VINH, Input High Voltage
2.0
2.0
V min
VINL, Input Low Voltage
0.8
0.8
V max
IINH, Input Current
10
10
µA max
CIN, Input Capacitance
10
10
pF max
LOGIC OUTPUTS
VOH, Output High Voltage
4.0
4.0
V min
|IOUT|
≤ 200 µA
VOL, Output Low Voltage
0.4
0.4
V max
|IOUT| ≤ 1.6 mA
POWER SUPPLIES
AVDD
4.75/5.25
4.75/5.25
V min/V max
DVDD
4.75/5.25
4.75/5.25
V min/V max
IDD (Total from AVDD, DVDD)
28.5
28.5
mA max
Digital Inputs Equal to 0 V or DVDD
Power Consumption
150
150
mW max
Active Mode
Power Consumption
100
100
µW max
Standby Mode
NOTES
1Operating temperature range is as follows: A Version: –40
°C to +85°C; S Version: –55°C to +125°C.
2Applies after calibration at temperature of interest.
3Full-scale error applies to both positive and negative full-scale error. The ADC gain is calibrated w.r.t. the voltage on the REFIN pin.
Specifications subject to change without notice.
REV. A
–2–
(AVDD = +5 V
5%; DVDD = +5 V
5%; AGND = DGND = 0 V,
fCLK = 15 MHz, REFIN = +2.5 V; TA = TMIN to TMAX, unless otherwise noted)


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