5

ADS7835

®

TYPICAL PERFORMANCE CURVES (Cont.)

At TA = +25°C, +VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, and internal +2.5V reference, unless otherwise specified.

PEAK-TO-PEAK NOISE

vs EXTERNAL REFERENCE VOLTAGE

2.2

2

2.5

2.1

2.3

External Reference Voltage (V)

0.90

0.85

0.80

0.75

0/70

0.65

0.60

0.55

0.50

2.4

CHANGE END-POINT ERRORS

vs EXTERNAL REFERENCE VOLTAGE

External Reference Voltage (V)

4.0

3.0

2.0

1.0

0.0

–1.0

–2.0

–3.0

–4.0

–5.0

2.2

2.4

2.6

3.0

2.8

Positive Full-Scale Error

and Bipolar Offset Error

Negative Full-Scale Error

POWER SUPPLY REJECTION RATIO

vs POWER SUPPLY RIPPLE FREQUENCY

11M

10

100

1k

Power Supply Ripple Frequency (Hz)

30

25

20

15

10

5

0

10k

100k

0

0

50

100

150

200

250

Frequency (kHz)

–120

–100

–80

–60

–40

–20

FREQUENCY SPECTRUM

(4096 Point FFT; f

IN = 977Hz, –0.2dB)

0

–20

–40

–60

–80

–100

–120

0

50

100

150

200

250

Frequency (kHz)

FREQUENCY SPECTRUM

(4096 Point FFT; f

IN = 9.77kHz, –0.2dB)

0

–20

–40

–60

–80

–100

–120

0

50

100

150

200

250

Frequency (kHz)

FREQUENCY SPECTRUM

(4096 Point FFT; f

IN = 99.7kHz, –0.2dB)