AD7328 Datasheet, PDF (9/36 Pages) Analog Devices – 8-Channel, Software-Selectable True Bipolar Input, 12-Bit Plus Sign ADC

TYPICAL PERFORMANCE CHARACTERISTICS
0
4096 POINT FFT
V_CC = V_DRIVE = 5V
–20
V_DD, V_SS = ±15V
T_A = 25°C
INT/EXT 2.5V REFERENCE
–40
±10V RANGE
F_IN = 50kHz
SNR = 77.30dB
–60
SINAD = 76.85dB
THD = –86.96dB
SFDR = –88.22dB
–80
–100
–120
–140
0
50 100 150 200 250 300 350 400 450 500
FREQUENCY (kHz)
Figure 4. FFT True Differential Mode
AD7328
1.0
V_CC = V_DRIVE = 5V
0.8 T_A = 25°C
V_DD, V_SS = ±15V
0.6
INT/EXT 2.5V REFERENCE
±10V RANGE
+INL = +0.55LSB
–INL = –0.68LSB
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
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Figure 7. Typical INL True Differential Mode
0
4096 POINT FFT
V_CC = V_DRIVE = 5V
–20
V_DD, V_SS = ±15V
T_A = 25°C
INT/EXT 2.5V REFERENCE
–40
±10V RANGE
F_IN = 50kHz
SNR = 74.67dB
–60
SINAD = 74.03dB
THD = –82.68dB
SFDR = –85.40dB
–80
–100
–120
–140
0
50 100 150 200 250 300 350 400 450 500
FREQUENCY (kHz)
Figure 5. FFT Single-Ended Mode
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6 VCC = VDRIVE = 5V
±10V RANGE
T_A = 25°C
+DNL = +0.79LSB
–0.8 ^VDD^{, V}SS ^{= ±15V}
–DNL = –0.38LSB
INT/EXT 2.5V REFERENCE
–1.0
0
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CODE
Figure 8. Typical DNL Single-Ended Mode
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
V_CC = V_DRIVE = 5V
T_A = 25°C
V_DD, V_SS = ±15V
INT/EXT 2.5V REFERENCE
±10V RANGE
–0.8
+DNL = +0.72LSB
–DNL = –0.22LSB
–1.0
0
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CODE
Figure 6. Typical DNL True Differential Mode
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
V_CC = V_DRIVE = 5V
T_A = 25°C
–0.6
V_DD, V_SS = ±15V
INT/EXT 2.5V REFERENCE
±10V RANGE
–0.8
+INL = +0.87LSB
–1.0
0
–INL = –0.49LSB
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512 1536 2560 3584 4608 5632 6656 7680
CODE
Figure 9. Typical INL Single-Ended Mode
Rev. A | Page 9 of 36