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