参数资料
型号: LOG104AIDRE4
厂商: TEXAS INSTRUMENTS INC
元件分类: 模拟运算功能
英文描述: LOG OR ANTILOG AMPLIFIER, 0.01 MHz BAND WIDTH, PDSO8
封装: ROHS COMPLIANT, PLASTIC, MS-012AA, SOIC-8
文件页数: 8/13页
文件大小: 244K
代理商: LOG104AIDRE4
www.ti.com
LOG104
4
SBOS243C
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = ±5V, RL = 10k, unless otherwise noted.
ONE CYCLE OF NORMALIZED TRANSFER FUNCTION
Normalized
Output
Voltage
(V)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
26
110
3
Current Ratio, I
1/I2
48
2.0
1.5
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
Normalized
Output
V
oltage
(V)
NORMALIZED TRANSFER FUNCTION
0.0001 0.001
0.01
0.1
1
10
100
1k
10k
Current Ratio, I
1/I2
V
OUT = 0.5V LOG (I1/I2)
3dB FREQUENCY RESPONSE
3dB
Frequency
Response
(Hz)
0.1
1M
100k
10k
1k
100
10
1
100
A
100
A
1mA
I
1 = 1mA
1
A
1mA
to 10
A
100nA
10nA
I
1 = 1nA
10nA
C C
= 1000pF
C C
= 1
F
10
A to
1
A
C C
= 10pF
1nA
100
A
100pA
1nA
10nA
100nA
1
A10A 100A1mA
I
2
1
A
10
A
100
A
I
1 = 1nA
10nA
120
100
80
60
40
20
0
100pA 1nA
10nA 100nA
1
A10A 100A 1mA 10mA
TOTAL ERROR vs INPUT CURRENT
Input Current (I
1 or I2)
T
otal
Error
(mV)
+75
°C
+25
°C –5°C
5.8
4.8
3.8
2.8
1.8
0.8
–0.2
100pA 1nA
10nA 100nA 1
A10A 100A 1mA 10mA
GAIN ERROR (I
2 = 1A)
Input Current (I
1 or I2)
Gain
Error
(%)
–5
°C to –40°C
+85
°C
+75
°C
+25
°C
MINIMUM VALUE OF COMPENSATION CAPACITOR
100M
10M
1M
100k
10k
1k
100
10
1
C
(pF)
100pA
1nA
10nA 100nA
1
A10A 100A 1mA 10mA
I
2
I
1 = 100pA
I
1 = 1nA
I
1 = 10nA
I
1 = 100nA
1
A
I
1 = 10A
100
A
1mA
Select C
C for I1 min.
and I
2 max. Values
below 2pF may be ignored.
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