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AD7478 데이터시트(PDF) 2 Page - Analog Devices

부품명 AD7478
상세설명  1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SOT-23
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REV. D
–2–
AD7476–SPECIFICATIONS1
(A Version: VDD = 2.7 V to 5.25 V, fSCLK = 20 MHz, fSAMPLE = 1 MSPS, unless otherwise
noted; S and B Versions: VDD = 2.35 V to 5.25 V, fSCLK = 12 MHz, fSAMPLE = 600 kSPS,
unless otherwise noted; TA = TMIN to TMAX, unless otherwise noted.)
Parameter
A Version
1, 2
B Version
1, 2
S Version
1, 2
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 100 kHz Sine Wave
Signal-to-(Noise + Distortion) (SINAD)
3
69
70
69
dB min
B Version, VDD = 2.4 V to 5.25 V
70
70
dB min
TA = 25
°C
71.5
dB typ
Signal-to-Noise Ratio (SNR)
3
70
71
70
dB min
B Version, VDD = 2.4 V to 5.25 V
72.5
dB typ
Total Harmonic Distortion (THD)
3
–80
–78
–78
dB typ
Peak Harmonic or Spurious Noise (SFDR)
3
–82
–80
–80
dB typ
Intermodulation Distortion (IMD)
3
Second-Order Terms
–78
–78
–78
dB typ
fa = 103.5 kHz, fb = 113.5 kHz
Third-Order Terms
–78
–78
–78
dB typ
fa = 103.5 kHz, fb = 113.5 kHz
Aperture Delay
10
10
10
ns typ
Aperture Jitter
30
30
30
ps typ
Full Power Bandwidth
6.5
6.5
6.5
MHz typ
@ 3 dB
DC ACCURACY
S, B Versions, VDD = (2.35 V to 3.6 V)
4;
A Version, VDD = (2.7 V to 3.6 V)
Resolution
12
12
12
Bits
Integral Nonlinearity
3
±1.5
±1.5
LSB max
±1
±0.6
±0.6
LSB typ
Differential Nonlinearity
3
–0.9/+1.5
–0.9/+1.5
LSB max
Guaranteed No Missed Codes to 12 Bits
±0.75
±0.75
±0.75
LSB typ
Offset Error
3
±1.5
±2
LSB max
±0.5
LSB typ
Gain Error
3
±1.5
±2
LSB max
±0.5
LSB typ
ANALOG INPUT
Input Voltage Ranges
0 to VDD
0 to VDD
0 to VDD
V
DC Leakage Current
±1
±1
±1
µA max
Input Capacitance
30
30
30
pF typ
LOGIC INPUTS
Input High Voltage, VINH
2.4
2.4
2.4
V min
1.8
1.8
1.8
V min
VDD = 2.35 V
Input Low Voltage, VINL
0.4
0.4
0.4
V max
VDD = 3 V
0.8
0.8
0.8
V max
VDD = 5 V
Input Current, IIN, SCLK Pin
±1
±1
±1
µA max
Typically 10 nA, VIN = 0 V or VDD
Input Current, IIN, CS Pin
±1
±1
±1
µA typ
Input Capacitance, CIN
5
10
10
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
VDD – 0.2
VDD – 0.2
VDD – 0.2
V min
ISOURCE = 200
µA; V
DD = 2.35 V to 5.25 V
Output Low Voltage, VOL
0.4
0.4
0.4
V max
ISINK = 200
µA
Floating-State Leakage Current
±10
±10
±10
µA max
Floating-State Output Capacitance
5
10
10
10
pF max
Output Coding
Straight (Natural) Binary
CONVERSION RATE
Conversion Time
0.8
1.33
1.33
µs max
16 SCLK Cycles
Track-and-Hold Acquisition Time
500
500
500
ns max
Full-Scale Step Input
350
400
400
ns max
Sine Wave Input
≤100 kHz
Throughput Rate
1000
600
600
kSPS max
See Serial Interface Section
POWER REQUIREMENTS
VDD
2.35/5.25
2.35/5.25
2.35/5.25
V min/max
IDD
Digital I/Ps = 0 V or VDD
Normal Mode (Static)
222mA typ
VDD = 4.75 V to 5.25 V. SCLK On or Off
111mA typ
VDD = 2.35 V to 3.6 V. SCLK On or Off
Normal Mode (Operational)
3.5
3
3
mA max
VDD = 4.75 V to 5.25 V; fSAMPLE = fSAMPLEMAX
6
1.6
1.4
1.4
mA max
VDD = 2.35 V to 3.6 V; fSAMPLE = fSAMPLEMAX
6
Full Power-Down Mode
1
1
1
µA max
SCLK Off
80
80
80
µA max
SCLK On
Power Dissipation
7
Normal Mode (Operational)
17.5
15
15
mW max
VDD = 5 V; fSAMPLE = fSAMPLEMAX
6
4.8
4.2
4.2
mW max
VDD = 3 V; fSAMPLE = fSAMPLEMAX
6
Full Power-Down
5
5
5
µW max
VDD = 5 V; SCLK Off
333
µW max
VDD = 3 V; SCLK Off
NOTES
1Temperature ranges as follows: A, B Versions: –40
°C to +85°C; S Version: –55°C to +125°C.
2Operational from V
DD = 2.0 V.
3See Terminology section.
4Maximum B, S version specifications apply as typical figures when V
DD = 5.25 V.
5Guaranteed by characterization.
6A Version: f
SAMPLEMAX = 1 MSPS; B, S Versions: fSAMPLEMAX = 600 kSPS.
7See Power vs. Throughput Rate section.
Specifications subject to change without notice.


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