Datasheet

AD7739 Data Sheet
Rev. A | Page 10 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 6. No Missing Codes Performance, Chopping Enabled
Figure 7. No Missing Codes Performance, Chopping Disabled
Figure 8. Typical FFT Plot; Input Sine Wave 183 Hz,1.2 V Peak, AIN Range
±1.25 V, Conversion Time 397 µs, Chopping Enabled, MCLK = 6.144 MHz
Figure 9. Typical Effective and Peak-to-Peak Resolution; AIN Voltage = 0 V,
AIN Range ±1.25 V, Chopping Enabled, MCLK = 6.144 MHz
Figure 10. Typical Effective and Peak-to-Peak Resolution; AIN Voltage = 0 V,
AIN Range ±1.25 V, Chopping Disabled, MCLK = 6.144 MHz
Figure 11. Typical Common-Mode Rejection vs. AIN Voltage; AIN Range
±1.25 V, Conversion Time 397 µs, Chopping Enabled, MCLK = 6.144 MHz
16
17
18
19
20
21
22
23
24
25
5 6 7 8
9 10
11
12 13
14 15
F
IL
TE
R
WO
R
D
NO MISSING CODES
03742-0-005
CHOP = 1
16
17
18
19
20
21
22
23
24
25
5
6 7 8
9 10 11
12 13 14 15
FIL
TER
WORD
NO MISSING CO
DES
03742-0-006
CHOP = 0
–180
–160
–140
–120
–100
–
80
–60
–
40
–20
0
0 200 400 600 800 1000 1200 1400
INPUT FREQUENCY (Hz)
GAIN (dB)
03742-0-007
THD = 110dB
8
10
12
14
16
18
20
22
24
10
6
8
2 4
0 12 14 16
OUTPUT DATA RATE (kHz)
RESOLUTION (bits)
03742-0-008
CHOP = 1
p-p
EFFECTIVE (rms)
8
10
12
14
16
18
20
22
24
106 82
40
12 1
4 16
OUTPUT DATA RATE (kHz)
RESOLUTION (bits)
03742-0-009
CHOP = 0
p-p
EFFECTIVE (rms)
60
70
80
90
100
110
120
0–0.5–1.0
–1.5 0.5 1.0
1.5
AIN DIFFERENTIAL VOLTAGE (V)
CMR (dB)
03742-0-010
CHOP = 1