ADS7818E Datasheet, PDF (5/21 Pages) Texas Instruments – 12-Bit High Speed Low Power Sampling ANALOG-TO-DIGITAL CONVERTER

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.
CHANGE IN FULL-SCALE ERROR
vs EXTERNAL REFERENCE VOLTAGE
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
2.0
2.1
2.2
2.3
2.4
2.5
External Reference Voltage (V)
CHANGE IN OFFSET
vs EXTERNAL REFERENCE VOLTAGE
0.5
0.4
0.3
0.2
0.1
0.0
–0.1
–0.2
–0.3
–0.4
1.9
2.1
2.3
2.5
2.7
2.9
3.1
External Reference Voltage (V)
PEAK-TO-PEAK NOISE
vs EXTERNAL REFERENCE VOLTAGE
0.70
0.65
0.60
0.55
0.50
0.45
0.40
2.0
2.1
2.2
2.3
2.4
2.5
External Reference Voltage (LSB)
30
25
20
15
10
5
0
1
POWER SUPPLY REJECTION
vs POWER SUPPLY RIPPLE FREQUENCY
10
100
1k
10k 100k 1M
Power Supply Ripple Frequency (Hz)
0
–20
–40
–60
–80
–100
–120
0
FREQUENCY SPECTRUM
(4096 Point FFT; f_IN = 10.9kHz, –0.2dB)
62.5
125
187.5
250
Frequency (kHz)
0
–20
–40
–60
–80
–100
–120
0
FREQUENCY SPECTRUM
(4096 Point FFT; f_IN = 102kHz, –0.2dB)
62.5
125
187.5
250
Frequency (kHz)
®
5
ADS7818