AD7484 Analog Devices, AD7484 Datasheet - Page 9

• Manufacturer Part Number: AD7484
• Description: 14-Bit, 3 MSPS SAR ADC
• Manufacturer: Analog Devices

Specifications of AD7484

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 3MSPS
• Interface: Par
• Analog Input Type: SE-Uni
• Ain Range: Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: QFP

TYPICAL PERFORMANCE CHARACTERISTICS
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
–100
–120
–140
–100
–120
–140
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
0
0
f
SNR = 77.7dB
SNR + D = 77.6dB
THD = –95.5dB
IN
Figure 3. 64 k FFT Plot with 10 kHz Input Tone
Figure 4. 64 k FFT Plot with 1 MHz Input Tone
= 1.013MHz
200
200
4096
400
400
Figure 5. Typical DNL
FREQUENCY (kHz)
FREQUENCY (kHz)
600
600
ADC (Code)
8192
800
800
1000
1000
12288
SNR + D = 78.8dB
THD = –93.9dB
1200
SNR = 78.9dB
1200
f
IN
= 10.7kHz
1400
1400
16384
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–100
–0.2
–0.4
–0.6
–0.8
–1.0
–40
–50
–60
–70
–80
–90
80
75
70
65
1.0
0.8
0.6
0.4
0.2
0
100
Figure 8. THD vs. Input Tone for Different Input Resistances
10
0
Figure 7. SINAD vs. Input Tone (AD8021 Input Circuit)
4096
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
100
Figure 6. Typical INL
ADC (Code)
8192
1000
100Ω
10Ω
0Ω
200Ω
1000
12288
51Ω
AD7484
10000
10000
16384