Datasheet

AD8420 Data Sheet
Rev. 0 | Page 14 of 28
30
0
200
150
100
50
0
–50
–100
5
10
15
20
25
–40 1251109580655035205–10–25
BIAS CURRENT (nA)
OFFSET CURRENT (pA)
TEMPERATURE (°C)
OFFSET CURRENT
–IN BIAS CURRENT
+IN BIAS CURRENT
09945-332
Figure 33. FB, REF Bias Current and FB, REF Offset Current vs. Temperature
1000
–1000
–800
–600
–400
–200
0
200
400
600
800
–40 80655035205–10–25
GAIN ERROR (µV/V)
TEMPERATURE (°C)
PART A
V
IN
= ±1V
V
S
= ±15V
PART B
09945-333
REPRESENTATIVE DATA
NORMALIZED TO 25ºC
Figure 34. Gain Error vs. Temperature, G = 1, V
IN
= ±1 V, V
S
= ±15 V
1000
–1000
–800
–600
–400
–200
0
200
400
600
800
–40 80655035205–10–25
GAIN ERROR (µV/V)
TEMPERATURE (°C)
PART A
V
IN
= ±0.1V
V
S
= ±15V
PART B
09945-334
REPRESENTATIVE DATA
NORMALIZED TO 25ºC
Figure 35. Gain Error vs. Temperature, G = 1, V
IN
= ±0.1 V, V
S
= ±15 V
400
–400
–300
–200
–100
0
100
200
300
–40 –25 –10 5 20 35 50 65 80 95 110 125
OFFSET VOLTAGE (µV)
TEMPERATURE (°C)
09945-031
NORMALIZED TO 25°C
Figure 36. Offset Drift
–40 –25 –10 5 20 35 50 65 80 95 110 125
CMRR (µV/V)
TEMPERATURE (°C)
09945-032
–4
5
4
3
2
1
0
–1
–2
–3
PART A: 0.024ppm/°C
PART B: 0.038ppm/°C
REPRESENTATIVE DATA
NORMALIZED AT 25°C
V
S
= ±15V
Figure 37. CMRR vs. Temperature, G = 1, V
S
= ±15 V
+
V
S
–V
S
+0.3
+0.2
+0.1
–0.3
–0.2
–0.1
2218161210864
OUTPUT VOLTAGE SWING (V)
REFERRED TO SUPPLY VOLTAGES
SUPPLY VOLTAGE (±V
S
)
0
–40°C
+25°C
+85°C
+125°C
R
L
= 20k
09945-035
Figure 38. Output Voltage Swing vs. Supply Voltage, R
L
= 20 kΩ