AD7934-6 Analog Devices, AD7934-6 Datasheet - Page 9

• Manufacturer Part Number: AD7934-6
• Description: 4-Channel, 625 kSPS, 12-Bit Parallel ADC with a Sequencer
• Manufacturer: Analog Devices

Specifications of AD7934-6

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 625kSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: SOP

TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
Figure 5. SINAD vs. Analog Input Frequency for Various Supply Voltages
Figure 3. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
–100
–110
–120
–60
–70
–80
–90
–70
–75
–80
–85
–90
–95
80
70
60
50
40
30
20
10
0
0
100mV p-p SINE WAVE ON V
NO DECOUPLING
DIFFERENTIAL/SINGLE-ENDED MODE
INTERNAL/EXTERNAL REFERENCE
V
F
RANGE = 0 TO V
DIFFERENTIAL MODE
DD
SAMPLE
100
= 5V
100
Figure 4. Channel-to-Channel Isolation
EXT REF
INT REF
210
= 625kSPS
200
SUPPLY RIPPLE FREQUENCY (kHz)
200
300
REF
NOISE FREQUENCY (kHz)
300
FREQUENCY (kHz)
410
400
500
400
DD
V
AND/OR V
DD
600
610
= 3V
500
V
DD
700
DRIVE
= 5V
600
810
800
700
900
1010
1000
800
Rev. B | Page 9 of 28
–100
–110
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
–10
–20
–30
–40
–50
–60
–70
–80
–90
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
500
500
Figure 7. Typical DNL @ V
Figure 8. Typical INL @ V
1000
1000
Figure 6. FFT @ V
1500
1500
FREQUENCY (kHz)
2000
CODE
2000
CODE
DD
= 5 V
2500
2500
DD
DD
V
DIFFERENTIAL MODE
V
DIFFERENTIAL MODE
4096 POINT FFT
V
F
F
SINAD = 70.94dB
THD = –90.09dB
DIFFERENTIAL MODE
= 5 V
DD
= 5 V
SAMPLE
IN
DD
DD
= 49.62kHz
= 5V
3000
= 5V
= 5V
3000
AD7934-6
= 625kSPS
3500
3500
4000
4000