AD641_15 Datasheet, PDF (4/16 Pages) Analog Devices – 250 MHz Demodulating Logarithmic Amplifier

AD641–Typical DC Performance Characteristics
1.015
1.010
1.005
1
0.995
0.990
0.985
0.980
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 1. Slope Current, I_Y, vs.
Temperature
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 2. Intercept Voltage, V_X, vs.
Temperature
1.006
1.004
1.002
1.000
0.998
0.996
0.994
4.5 5.0 5.5 6.0 6.5 7.0 7.5
POWER SUPPLY VOLTAGES – ؎ Volts
Figure 3. Slope Current, I_Y, vs. Supply
Voltages
1.015
1.010
1.005
1.000
0.995
0.990
0.985
4.5 5.0 5.5 6.0 6.5 7.0 7.5
POWER SUPPLY VOLTAGES – ؎ Volts
Figure 4. Intercept Voltage, V_X, vs.
Supply Voltages
14
13
12
11
10
9
8
7
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 5. Intercept Voltage (Using
Attenuator) vs. Temperature
+0.4
+0.3
+0.2
+0.1
INPUT OFFSET VOLTAGE
DEVIATION WILL BE WITHIN
SHADED AREA.
0
–0.1
–0.2
–0.3
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 6. Input Offset Voltage Devia-
tion vs. Temperature
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
0.1
2
1
0
1.0
10.0
100.0
INPUT VOLTAGE – mV
(EITHER SIGN)
1000.0
Figure 7. DC Logarithmic Transfer
Function and Error Curve for Single
AD641
2.5
2.5
2.0
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 8. Absolute Error vs. Tempera-
ture, V_IN = ±1 mV to ±100 mV
0
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 9. Absolute Error vs. Tempera-
ture, Using Attenuator. V_IN = ±10 mV
to ±1 V, Pin 8 Grounded to Disable ITC
Bias
–4–
REV. C