Datasheet

5 ADS7835
®
TYPICAL PERFORMANCE CURVES (Cont.)
At T
A
= +25°C, +V
CC
= +5V, f
SAMPLE
= 500kHz, f
CLK
= 16 • f
SAMPLE
, and internal +2.5V reference, unless otherwise specified.
PEAK-TO-PEAK NOISE
vs EXTERNAL REFERENCE VOLTAGE
2.22 2.52.1 2.3
External Reference Voltage (V)
Peak-to-Peak Noise (LSB)
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
Delta from V
REF
= 2.5V (LSB)
2.2 2.4 2.6
3.02.8
Positive Full-Scale Error
and Bipolar Offset Error
Negative Full-Scale Error
POWER SUPPLY REJECTION RATIO
vs POWER SUPPLY RIPPLE FREQUENCY
11M10 100 1k
Power Supply Ripple Frequency (Hz)
Power Supply Rejection Ratio (mV/V)
30
25
20
15
10
5
0
10k 100k
0
0 50 100 150 200 250
Frequency (kHz)
Amplitude (dB)
–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)
Amplitude (dB)
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)
Amplitude (dB)
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 99.7kHz, –0.2dB)