AD7656YSTZ Datasheet, PDF (14/32 Pages) Analog Devices – 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADC

AD7656/AD7657/AD7658
TYPICAL PERFORMANCE CHARACTERISTICS
0
V_DD/V_SS = ±15V
–20
AV_CC/DV_CC/V_DRIVE = +5V
INTERNAL REFERENCE
±10V RANGE
–40
T_A = 25°C
f_S = 250kSPS
f_IN = 50kHz
–60
SNR = +87.33dB
SINAD = +87.251dB
–80
THD = –104.32dB
SFDR = –104.13dB
–100
–120
–140
–160
0
25
50
75
100
125
FREQUENCY (kHz)
Figure 4. AD7656 FFT for ±10 V Range
0
–20
–40
–60
–80
–100
–120
–140
–160
0
V_DD/V_SS = ±12V
AV_CC/DV_CC/V_DRIVE = +5V
INTERNAL REFERENCE
±5V RANGE
T_A = 25°C
f_S = 250kSPS
f_IN = 50kHz
SNR = +86.252dB
SINAD = +86.196dB
THD = –105.11dB
SFDR = –98.189dB
25
50
75
100
125
FREQUENCY (kHz)
Figure 5. AD7656 FFT for ±5 V Range
2.0
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±12V
1.5 _{fSAMPLE = 250kSPS}
2 × V_REF RANGE
1.0 ^{INL WCP = 0.64LSB}
INL WCN = –0.76LSB
0.5
0
–0.5
–1.0
–1.5
–2.0
0
10k
20k
30k
40k
50k
CODE
Figure 6. AD7656 Typical INL
60k 65535
Data Sheet
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±12V
f_SAMPLE = 250kSPS
2 × V_REF RANGE
DNL WCP = 0.81LSB
DNL WCN = –0.57LSB
–2.0
0
10k
20k
30k
40k
50k
CODE
Figure 7. AD7656 Typical DNL
60k 65535
2.0
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
–2.0
0
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±12V
f_SAMPLE = 250kSPS
2 × V_REF RANGE
2000 4000 6000 8000 10000 12000 14000 16383
CODE
Figure 8. AD7657 Typical INL
2.0
AV_CC/DV_CC/V_DRIVE = +5V
1.6 ^VDD^/VSS ^{= ±12V}
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
–2.0
0
2000 4000 6000 8000 10000 12000 14000 16383
CODE
Figure 9. AD7657 Typical DNL
Rev. D | Page 14 of 32