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参数资料
| 型号： | LOG112AIDRE4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟运算功能 |
| 英文描述： | LOG OR ANTILOG AMPLIFIER, 1.4 MHz BAND WIDTH, PDSO14 |
| 封装： | GREEN, PLASTIC, MS-012AB, SOIC-14 |
| 文件页数： | 2/20页 |
| 文件大小： | 621K |
| 代理商： | LOG112AIDRE4 |
LOG112, 2112
10
SBOS246D
www.ti.com
FIGURE 11. Single +5V Power-Supply Operation.
14
1
5
10
6
9
1
2
35
4
–5V
1
F
LOG112
1
F
I
1
I
2
V
LOGOUT
C
1
F
TPS(1)
Single Supply +5V
NOTE: (1) TPS60402DBV
negative charge pump.
FIGURE 10. Absorbance Measurement.
I
2
I
1
14
1
9
10
5
V
LOGOUT
6
V+
V–
C
LOG112
D
2
D
1
Sample
λ
1
λ
1
λ
1
Light
Source
DATA COMPRESSION
In many applications, the compressive effects of the logarith-
mic transfer function are useful. For example, a LOG112
preceding a 12-bit A/D converter can produce the dynamic
range equivalent to a 20-bit converter.
OPERATION ON SINGLE SUPPLY
Many applications do not have the dual supplies required to
operate the LOG112 and LOG2112. Figure 11 shows the
LOG112 and LOG2112 configured for operation with a single
+5V supply.
MEASURING AVALANCHE PHOTODIODE CURRENT
The wide dynamic range of the LOG112 and LOG2112 is
useful for measuring avalanche photodiode current (APD), as
shown in Figure 12.
FIGURE 12. High-Side Shunt for APD Measures 3 Decades of APD Current.
A
1
–5V
SO-14
911
13
LOG112
Q
1
2
Q
2
I
OUT
I
OUT = 0.1 ISHUNT
10
3
4
10k
Receiver
Irx = 1
A to 1mA
I-to-V
Converter
APD
10Gbits/sec
16.7k
C
A
2
A
3
V
03 = 2.5V to 0V
I
SHUNT
500
5k
5k
+15V to +60V
+5V
INA168
SOT23-5
+5V
1
14
8
6
5
7
100
A
25k
V
REF
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LOG114 | 制造商:BB 制造商全称:BB 功能描述:Precision, High-Speed Transimpedance Amplifier |
| LOG114_12 | 制造商:BB 制造商全称:BB 功能描述:Single-Supply, High-Speed, Precision LOGARITHMIC AMPLIFIER |
| LOG114AIRGVR | 功能描述:对数放大器 Precision High-Speed RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| LOG114AIRGVRG4 | 功能描述:对数放大器 Prec High-Speed Logarithmic Amp RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| LOG114AIRGVT | 功能描述:对数放大器 Precision High-Speed RoHS:否 制造商:Texas Instruments 通道数量:3 带宽:3 dB 共模抑制比（最小值）: 输入补偿电压:+/- 7 mV 输入电压范围（最大值）:5.5 V 工作电源电压:4.5 V to 5.5 V 电源电流:+/- 15 mA 工作温度范围:- 40 C to +85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
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