ADS7279_14 Datasheet, PDF (22/51 Pages) Texas Instruments – LOW-POWER, 14-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE

ADS7279
ADS7280
SBAS436A – MAY 2008 – REVISED JUNE 2009 ............................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
At –40°C to +85°C, V_REF [(REF+) – (REF–)] = 5V when +VA = +VBD = 5V or V_REF [(REF+) – (REF–)] = 2.5V when +VA =
+VBD = 3V, f_SCLK = 42MHz, or V_REF = 2.5 when +VA = +VBD = 2.7V, f_SCLK = 37.8MHz; f_I = dc for dc curves, f_I = 100kHz for ac
curves with 5V supply and f_I = 10kHz for ac curves with 3V supply, unless otherwise noted.
0
-20
-40
-60
-80
-100
-120
-140
-160
0
3.0
2.5
2.0
1.5
1.0
0.5
0
FFT
10kHz Input
+VA = 5V
f_S = 1MSPS
V_REF = 5V
100
200
300
400
500
Frequency (kHz)
Figure 48.
0
-20
-40
-60
-80
-100
-120
-140
-160
0
FFT
100kHz Input
+VA = 5V
f_S = 1MSPS
V_REF = 5V
100
200
300
400
500
Frequency (kHz)
Figure 49.
I/O SUPPLY CURRENT
vs I/O SUPPLY VOLTAGE
BVDD (V)
Figure 50.
9000
8000
CODE HISTOGRAM
REF = 2.5V
7000
6000
5000
4000
3000
2000
1000
0
516
517
518
519
520
Output Code
Figure 51.
9000
REF = 5V
8000
CODE HISTOGRAM
7000
6000
5000
4000
3000
2000
1000
0
578
579
580
581
582
Output Code
Figure 52.
22
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