EVAL-AD7851CB View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD7851CB' PDF : 36 Pages View PDF
AD7851
SPECIFICATIONS1, 2
A Grade: fCLKIN = 7 MHz (–40؇C to +85؇C), fSAMPLE = 333 kHz; K Grade: fCLKIN = 6 MHz (0؇C to 85؇C), fSAMPLE = 285 kHz; A and K Grade: fCLKIN = 5 MHz
(to 125؇C), fSAMPLE = 238 kHz; (AVDD = DVDD = 5.0 V ؎ 5%, REFIN/REFOUT = 4.096 V External Reference; SLEEP = Logic High; TA = TMIN to TMAX,
unless otherwise noted.)
Parameter
Version A1 Version K1 Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal-to-Noise + Distortion Ratio3 (SNR) 77
78
Total Harmonic Distortion (THD)
–86
–86
Peak Harmonic or Spurious Noise
–87
–87
Intermodulation Distortion (IMD)
Second-Order Terms
–86
–90
Third-Order Terms
–86
–90
Full Power Bandwidth
20
20
dB min
dB max
dB max
dB typ
dB typ
MHz typ
Typically SNR Is 79.5 dB.
VIN = 10 kHz, Sine Wave, fSAMPLE = 333 kHz.
VIN = 10 kHz, Sine Wave, fSAMPLE = 333 kHz,
typically –96 dB.
VIN = 10 kHz, fSAMPLE = 333 kHz.
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 333 kHz.
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 333 kHz.
@ 3 dB.
DC ACCURACY
Resolution
Integral Nonlinearity
Differential Nonlinearity
Unipolar Offset Error
Positive Full-Scale Error
Negative Full-Scale Error
Bipolar Zero Error
14
14
±2
±1
±2
±1
± 10
± 10
± 10
± 10
± 10
± 10
±1
±1
Bits
LSB max
LSB max
LSB max
LSB max
LSB typ
LSB typ
Guaranteed No Missed Codes to 14 Bits
Review: Adjusting the Offset Calibration
Register in the Calibration Registers section.
ANALOG INPUT
Input Voltage Ranges
Leakage Current
Input Capacitance
0 V to VREF 0 V to VREF V
± VREF/2
± VREF/2
V
±1
±1
20
20
µA max
pF typ
AIN(+) – AIN(–) = 0 V to VREF, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
AIN(+) – AIN(–) = –VREF/2 to +VREF/2, AIN(–)
should be biased up and AIN(+) can go below
AIN(–) but cannot go below 0 V.
REFERENCE INPUT/OUTPUT
REFIN Input Voltage Range
Input Impedance
REFOUT Output Voltage
REFOUT Temperature Coefficient
LOGIC INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN4
LOGIC OUTPUTS
Output High Voltage, VOH
Output Low Voltage, VOL
Floating State Leakage Current
Floating State Output Capacitance4
Output Coding
4/VDD
150
4/VDD
150
3.696/4.496 3.696/4.496
50
50
V min/max
kΩ typ
V min/max
ppm/°C typ
Functional from 1.2 V.
Resistor Connected to Internal Reference Node.
VDD – 1.0
0.4
± 10
10
VDD – 1.0
0.4
± 10
10
V min
V max
µA max
pF max
VIN = 0 V or VDD.
VDD – 0.4 VDD – 0.4
0.4
0.4
± 10
± 10
10
10
Straight (Natural) Binary
Twos Complement
V min
V max
µA max
pF max
ISOURCE = 200 µA.
ISINK = 0.8 mA.
Unipolar Input Range.
Bipolar Input Range.
CONVERSION RATE
Conversion Time
Conversion + Track-and-Hold
Acquisition Time
2.78
3.25
3.0
3.5
µs max
µs max
19.5 CLKIN Cycles.
21 CLKIN Cycles Throughput Rate.
REV. B
–3–
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