AD7277 Analog Devices, AD7277 Datasheet - Page 13

• Manufacturer Part Number: AD7277
• Description: 3 MSPS,10-Bit ADC in 6-Lead TSOT
• Manufacturer: Analog Devices

Specifications of AD7277

• Resolution (bits): 10bit
• # Chan: 1
• Sample Rate: 3MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOP,SOT

TYPICAL PERFORMANCE CHARACTERISTICS
T
A
Figure 10. AD7276 Dynamic Performance at 3 MSPS, Input Tone = 1 MHz
Figure 11. AD7277 Dynamic Performance at 3 MSPS, Input Tone = 1 MHz
= 25°C, unless otherwise noted.
Figure 12. AD7276 SINAD vs. Analog Input Frequency at 3 MSPS
–100
–120
–100
–110
72.5
72.0
71.5
71.0
70.5
70.0
69.5
69.0
68.5
68.0
67.5
–20
–40
–60
–80
–10
–20
–30
–40
–50
–60
–70
–80
–90
100
for Various Supply Voltages, SCLK Frequency = 48 MHz
0
0
100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400
100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400
INPUT FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
V
DD
= 2.35V
V
DD
V
= 3V
16,384 POINT FFT
F
F
SINAD = 71.2dB
THD = –80.9dB
SFDR = –82.4dB
V
16,384 POINT FFT
F
F
SINAD = 61.6dB
THD = –80.2dB
SFDR = –83.4dB
V
DD
SAMPLE
IN
DD
SAMPLE
IN
DD
= 1MHz
= 1MHz
= 3.6V
= 3V
= 3V
1000
= 3MSPS
= 3MSPS
1500
1500
1500
Rev. C | Page 13 of 28
30,000
25,000
20,000
15,000
10,000
5,000
73.0
72.5
72.0
71.5
71.0
70.5
70.0
69.5
69.0
Figure 13. AD7276 SNR vs. Analog Input Frequency at 3 MSPS
–72
–74
–76
–78
–80
–82
–84
–86
–88
–90
100
100
0
for Various Supply Voltages, SCLK Frequency = 48 MHz
for Various Supply Voltages, SCLK Frequency = 48 MHz
Figure 15. THD vs. Analog Input Frequency at 3 MSPS
Figure 14. Histogram of Codes for 30,000 Samples
V
2046
DD
= 3V
2047
INPUT FREQUENCY (kHz)
INPUT FREQUENCY (kHz)
AD7276/AD7277/AD7278
CODES
30,000
CODE
2048
V
DD
= 2.35V
V
DD
V
V
= 2.35V
DD
DD
2049
= 3V
= 3.6V
V
1000
1000
DD
= 3.6V
2050
1500
1500