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AD7854ARS Datasheet(PDF) 2 Page - Analog Devices

Part # AD7854ARS
Description  3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7854ARS Datasheet(HTML) 2 Page - Analog Devices

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Parameter
A Version
1
B Version
1
S Version
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
70
71
70
dB min
Typically SNR is 72 dB
(SNR)
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Total Harmonic Distortion (THD)
–78
–78
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Peak Harmonic or Spurious Noise
–78
–78
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Intermodulation Distortion (IMD)
Second Order Terms
–78
–78
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Third Order Terms
–78
–78
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
DC ACCURACY
Resolution
12
12
12
Bits
Integral Nonlinearity
±1
±0.5
±1
LSB max
5 V Reference VDD = 5 V
Differential Nonlinearity
±1
±1
±1
LSB max
Guaranteed No Missed Codes to 12 Bits
Unipolar Offset Error
±3
±3
±4
LSB max
±2
±2
±2
LSB typ
Unipolar Gain Error
±4
±4
±4
LSB max
±2
±2
±2
LSB typ
Bipolar Positive Full-Scale Error
±4
±4
±5
LSB max
±2
±2
±2
LSB typ
Negative Full-Scale Error
±4
±4
±5
LSB max
±2
±2
±2
LSB typ
Bipolar Zero Error
±4
±4
±5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VREF
0 to VREF
0 to VREF
Volts
i.e., AIN(+) – AIN(–) = 0 to VREF, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
±VREF/2
±VREF/2
±VREF/2
Volts
i.e., AIN(+) – AIN(–) = –VREF/2 to +VREF/2, AIN(–)
should be biased to +VREF/2 and AIN(+) can go below
AIN(–) but cannot go below 0 V.
Leakage Current
±1
±1
±1
µA max
Input Capacitance
20
20
20
pF typ
REFERENCE INPUT/OUTPUT
REFIN Input Voltage Range
2.3/VDD
2.3/VDD
2.3/VDD
V min/max
Functional from 1.2 V
Input Impedance
150
150
150
k
Ω typ
REFOUT Output Voltage
2.3/2.75
2.3/2.7
2.3/2.7
V min/max
REFOUT Tempco
20
20
20
ppm/
°C typ
LOGIC INPUTS
Input High Voltage, VINH
3
3
3
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.1
2.1
2.1
V min
AVDD = DVDD = 3.0 V to 3.6 V
Input Low Voltage, VINL
0.4
0.4
0.4
V max
AVDD = DVDD = 4.5 V to 5.5 V
0.6
0.6
0.6
V max
AVDD = DVDD = 3.0 V to 3.6 V
Input Current, IIN
±10
±10
±10
µA max
Typically 10 nA, VIN = 0 V or VDD
Input Capacitance, CIN
4
10
10
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
ISOURCE = 200
µA
4
4
4
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.4
2.4
2.4
V min
AVDD = DVDD = 3.0 V to 3.6 V
Output Low Voltage, VOL
0.4
0.4
0.4
V max
ISINK = 0.8 mA
Floating-State Leakage Current
±10
±10
±10
µA max
Floating-State Output Capacitance
4
10
10
10
pF max
Output Coding
Straight (Natural) Binary
Unipolar Input Range
Twos Complement
Bipolar Input Range
CONVERSION RATE
tCLKIN
× 18
Conversion Time
4.6 (10)
4.6 (9)
4.6 (9)
µs max
(L Versions Only, 0
°C to +70°C, 1.8 MHz CLKIN)
Track/Hold Acquisition Time
0.5 (1)
0.5 (1)
0.5 (1)
µs min
(L Versions Only, –40
°C to +85°C, 1 MHz CLKIN)
AD7854/AD7854L–SPECIFICATIONS1, 2 (AV
DD = DVDD = +3.0 V to +5.5 V, REFIN/REFOUT = 2.5 V
External Reference, fCLKIN = 4 MHz (for L Version: 1.8 MHz (0 C to +70 C) and 1 MHz (–40 C to +85 C)); fSAMPLE = 200 kHz (AD7854), 100 kHz
(AD7854L); TA = TMIN to TMAX, unless otherwise noted.) Specifications in () apply to the AD7854L.
–2–
REV. B


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