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ADS7870 Fiches technique(PDF) 6 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
No de pièce ADS7870
Description  12-Bit ADC, MUX, PGA and Internal Reference DATA ACQUISITION SYSTEM
Download  27 Pages
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Fabricant  BURR-BROWN [Burr-Brown (TI)]
Site Internet  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

ADS7870 Fiches technique(HTML) 6 Page - Burr-Brown (TI)

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6
®
ADS7870
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VDD = +5.0V, VREF = 2.5V connected to BUFIN (using internal reference), 2.5MHz CCLK and 2.5MHz SCLK, unless otherwise noted.
15
10
5
0
–5
–10
–60
–40
–20
0
20
40
60
80
100
120
140
Temperature (
°C)
GAIN ERROR vs TEMPERATURE
Gain= 1
Gain = 8
Gain = 20
10
8
6
4
3
0
–2
–4
–60
–40
–20
0
20
40
60
80
100
120
140
Temperature (
°C)
OUTPUT OFFSET ERROR vs TEMPERATURE
Gain= 1
Gain = 8
Gain = 20
2.55
2.50
2.45
2.40
2.35
2.30
2.25
2.20
–60
–40
–20
0
20
40
60
80
100
120
140
Temperature (
°C)
INTERNAL OSCILLATOR FREQUENCY
vs TEMPERATURE
+3 Sigma
Avg
–3 Sigma
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
–60
–40
–20
0
20
40
60
00
100
120
140
Temperature (
°C)
VOLTAGE REFERENCE ERROR
vs TEMPERATURE
V
REF = 2.048V
or 2.5V
+3 Sigma
V
REF
–3 Sigma
2
1.5
1
0.5
0
–0.5
–1
–1.5
–2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Common-Mode Voltage (V)
OUTPUT OFFSET ERROR
vs COMMON-MODE VOLTAGE
1 LSB =
–72dB for Gain = 1
–98dB for Gain = 20
Gain= 1
Gain = 10
Gain = 20
8
7
6
5
4
3
2
1
0
–1
2
2.5
3
3.5
4
4.5
5
5.5
6
V
DD (V)
OUTPUT OFFSET ERROR
vs POWER SUPPLY VOLTAGE
4 LSB =
86dB (Gain = 20)
60dB (Gain = 1)
50kS/s, CCLK = 2.5MHz,
V
REF = 2.048V
Gain= 1
Gain = 10
Gain = 20


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