AD7656YSTZ Datasheet, PDF (15/32 Pages) Analog Devices – 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADC

Data Sheet
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±12V
f_SAMPLE = 250kSPS
2 × V_REF RANGE
500 1000 1500 2000 2500 3000 3500
CODE
4095
Figure 10. AD7658 Typical INL
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±12V
f_SAMPLE = 250kSPS
2 × V_REF RANGE
500 1000 1500 2000 2500 3000 3500
CODE
4095
Figure 11. AD7658 Typical DNL
90
AV_CC/DV_CC/V_DRIVE = +5.25V
V_DD/V_SS = ±16.5V
±10V RANGE
85
AV_CC/DV_CC/
V_DRIVE = +5V
80
AV_CC/DV_CC/
V_DRIVE = +4.75 V
V_DD/V_SS = ±12V
±5V RANGE
V_DD/V_SS = ±10V
±10V RANGE
75
AV_CC/DV_CC/
70
V_DRIVE = +5V
V_DD/V_SS = ±5.25V
±5V RANGE
65 _{fSAMPLE = 250kSPS}
INTERNAL REFERENCE
T_A = 25°C
60
10
100
ANALOG INPUT FREQUENCY (kHz)
Figure 12. AD7656 SINAD vs. Input Frequency
1000
AD7656/AD7657/AD7658
–60
–70
–80
–90
–100
–110
f_SAMPLE = 250kSPS
INTERNAL REFERENCE
T_A = 25°C
AV_CC/DV_CC/V_DRIVE = +5V
V_DD/V_SS = ±5.25V
±5V RANGE
AV_CC/DV_CC/
V_DRIVE = +4.75V
V_DD/V_SS = ±10V
±10V RANGE
AV_CC/DV_CC/
V_DRIVE = +5V
V_DD/V_SS = ±12V
±5V RANGE
AV_CC/DV_CC/
V_DRIVE = +5.25V
V_DD/V_SS = ±16.5V
±10V RANGE
–120
10
100
ANALOG INPUT FREQUENCY (kHz)
1000
Figure 13. AD7656 THD vs. Input Frequency
–60
V_DD/V_SS = ±16.5V
AV_CC/DV_CC/V_DRIVE = +5.25V
–70
T_A = 25°C
INTERNAL REFERENCE
±4 × V_REF RANGE
–80
–90
–100
R_SOURCE = 1000Ω
R_SOURCE = 100Ω
R_SOURCE = 220Ω
–110
–120
10
R_SOURCE = 10Ω
R_SOURCE = 50Ω
100
ANALOG INPUT FREQUENCY (kHz)
Figure 14. AD7656 THD vs. Input Frequency for Various Source Impedances,
±4 × VREF Range
–40
V_DD/V_SS = ±12V
–50
AV_CC/DV_CC/V_DRIVE = +5V
T_A = 25°C
INTERNAL REFERENCE
–60 ^{±2 × V}REF ^RANGE
–70
–80
–90
–100
R_SOURCE = 1000Ω
R_SOURCE = 220Ω
R_SOURCE = 100Ω
–110
R_SOURCE = 10Ω
R_SOURCE = 50Ω
–120
10
100
ANALOG INPUT FREQUENCY (kHz)
Figure 15. AD7656 THD vs. Input Frequency for Various Source Impedances,
±2 × VREF Range
Rev. D | Page 15 of 32