AD7739 datasheet(9/32 Pages) AD

9 / 32 page

AD7739

Rev. 0 | Page 9 of 32

TYPICAL PERFORMANCE CHARACTERISTICS

1112

1314

FILTER WORD

03742-0-005

CHOP = 1

Figure 5. No Missing Codes Performance, Chopping Enabled

1112

1314

FILTER WORD

03742-0-006

CHOP = 0

Figure 6. No Missing Codes Performance, Chopping Disabled

–180

–160

–140

–120

–100

–80

–60

–40

–20

200

400

600

800

1000

1200

1400

INPUT FREQUENCY (Hz)

03742-0-007

THD = 110dB

Figure 7. 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

121416

OUTPUT DATA RATE (kHz)

03742-0-008

CHOP = 1

p-p

EFFECTIVE (rms)

Figure 8. Typical Effective and Peak-to-Peak Resolution; AIN Voltage = 0 V,

AIN Range ±1.25 V, Chopping Enabled, MCLK = 6.144 MHz

121416

OUTPUT DATA RATE (kHz)

03742-0-009

CHOP = 0

p-p

EFFECTIVE (rms)

Figure 9. Typical Effective and Peak-to-Peak Resolution; AIN Voltage = 0 V,

AIN Range ±1.25 V, Chopping Disabled, MCLK = 6.144 MHz

100

110

120

–0.5

–1.0

–1.5

0.5

1.0

1.5

AIN DIFFERENTIAL VOLTAGE (V)

03742-0-010

CHOP = 1

Figure 10. Typical Common-Mode Rejection vs. AIN Voltage; AIN Range

±1.25 V, Conversion Time 397 µs, Chopping Enabled, MCLK = 6.144 MHz

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