TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, and internal +2.5V reference, unless otherwise specified.
FULL-SCALE ERROR
vs EXTERNAL REFERENCE VOLTAGE
OFFSET VOLTAGE vs EXTERNAL
REFERENCE VOLTAGE
0.300
0.200
0.2
0.1
0
0.100
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
0.000
–0.100
–0.200
–0.300
–0.400
–0.500
–0.600
2.0
2.1
2.2
2.3
2.4
2.5
2.0
2.2
2.4
2.55
External Reference Voltage (V)
External Reference Voltage (V)
PEAK-TO-PEAK NOISE
POWER SUPPLY REJECTION
vs EXTERNAL REFERENCE VOLTAGE
vs POWER SUPPLY RIPPLE FREQUENCY
0.90
0.85
0.80
0.75
0/70
0.65
0.60
0.55
0.50
30
25
20
15
10
5
0
2
2.1
2.2
2.3
2.4
2.5
1
10
100
1k
10k
100k
1M
Power Supply Ripple Frequency (Hz)
External Reference Voltage (V)
FREQUENCY SPECTRUM
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 977Hz, –0.2dB)
(4096 Point FFT; fIN = 9.77kHz, –0.2dB)
0
–20
0
–20
–40
–40
–60
–60
–80
–80
–100
–120
–100
–120
0
50
100
150
200
250
0
50
100
150
200
250
Frequency (kHz)
Frequency (kHz)
ADS7834
SBAS098A
5
www.ti.com
BB [ BURR-BROWN CORPORATION ]
