AD7927 Analog Devices, AD7927 Datasheet - Page 10

• Manufacturer Part Number: AD7927
• Description: 8-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7927

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 200kSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: SOP

AD7927
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 5. SINAD vs. Analog Input Frequency for Various Supply Voltages
–110
–10
–30
–50
–70
–90
75
70
65
60
0
0
f
T
RANGE = 0 TO REF
SAMPLE
A
10
= 25°C
Figure 4. Dynamic Performance at 200 kSPS
20
= 200kSPS
30
INPUT FREQUENCY (kHz)
IN
FREQUENCY (kHz)
at 200 kSPS
40
50
60
AV
AV
AV
AV
4096 POINT FFT
AV
f
f
SINAD = 70.714dB
THD = –82.853dB
SFDR = –84.815dB
SAMPLE
IN
DD
DD
DD
DD
70
DD
= 50kHz
= V
= V
= V
= V
= 4.75V
DRIVE
DRIVE
DRIVE
DRIVE
= 200kSPS
80
= 5.25V
= 4.75V
= 3.6V
= 2.7V
90
100
100
Rev. C | Page 10 of 28
Figure 7. THD vs. Analog Input Frequency for Various Supply Voltages
–10
–20
–30
–40
–50
–60
–70
–80
–90
–50
–55
–60
–65
–70
–75
–80
–85
–90
0
1
0
0
AV
200mV p-p SINE WAVE ON AV
REF
T
f
T
RANGE = 0 TO REF
A
SAMPLE
A
DD
= 25°C
= 25°C
20
IN
Figure 6. PSRR vs. Supply Ripple Frequency
= 5V
= 2.5V, 1µF CAPACITOR
= 200kSPS
40
SUPPLY RIPPLE FREQUENCY (kHz)
60
INPUT FREQUENCY (kHz)
IN
AV
at 200 kSPS
80
DD
= V
100
DD
AV
DRIVE
AV
DD
DD
120
= V
= V
= 3.6V
DRIVE
DRIVE
AV
140
DD
= 4.75V
= 2.7V
= V
160
DRIVE
Data Sheet
180
= 5.25V
200
1
0
0