- 您現在的位置：買賣IC網 > PDF目錄79707 > LOG114AIRGVR (TEXAS INSTRUMENTS INC) LOG OR ANTILOG AMPLIFIER, PQCC16 PDF資料下載
參數資料
| 型號： | LOG114AIRGVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬運算功能 |
| 英文描述： | LOG OR ANTILOG AMPLIFIER, PQCC16 |
| 封裝： | 4 X 4 MM, GREEN, PLASTIC, QFN-16 |
| 文件頁數： | 1/29頁 |
| 文件大小： | 637K |
| 代理商： | LOG114AIRGVR |
當前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
FEATURES
D ADVANTAGES:
Tiny for High Density Systems
Precision on One Supply
Fast Over Eight Decades
Fully-Tested Function
D TWO SCALING AMPLIFIERS
D WIDE INPUT DYNAMIC RANGE:
Eight Decades, 100pA to 10mA
D 2.5V REFERENCE
D STABLE OVER TEMPERATURE
D LOW QUIESCENT CURRENT: 10mA
D DUAL OR SINGLE SUPPLY: +5V, +5V
D PACKAGE: Small QFN-16 (4mm x 4mm)
D SPECIFIED TEMPERATURE RANGE:
5
°C to +75°C
APPLICATIONS
D ONET ERBIUM-DOPED FIBER OPTIC
AMPLIFIER (EDFA)
D LASER OPTICAL DENSITY MEASUREMENT
D PHOTODIODE SIGNAL COMPRESSION AMP
D LOG, LOG-RATIO FUNCTION
D ANALOG SIGNAL COMPRESSION IN FRONT
OF ANALOG-TO-DIGITAL (ADC) CONVERTER
D ABSORBANCE MEASUREMENT
DESCRIPTION
The LOG114 is specifically designed for measuring
low-level
and
wide
dynamic
range
currents
in
communications,
lasers,
medical,
and
industrial
systems. The device computes the logarithm or log-ratio
of an input current or voltage relative to a reference
current
or
voltage
(logarithmic
transimpedance
amplifier).
High precision is ensured over a wide dynamic range of
input signals on either bipolar (
±5V) or single (+5V)
supply. Special temperature drift compensation circuitry
is included on-chip. In log-ratio applications, the signal
current may be from a high impedance source such as
a photodiode or resistor in series with a low impedance
voltage source. The reference current is provided by a
resistor in series with a precision internal voltage
reference, photo diode, or active current source.
The output signal at VLOGOUT has a scale factor of 0.375V
out per decade of input current, which limits the output
so that it fits within a 5V or 10V range. The output can be
scaled and offset with one of the available additional
amplifiers, so it matches a wide variety of ADC input
ranges.
Stable
dc
performance
allows
accurate
measurement
of
low-level
signals
over
a
wide
temperature range. The LOG114 is specified over a
5
°C to +75°C temperature range and can operate from
40
°C to +85°C.
All trademarks are the property of their respective owners.
LOG114
SBOS301A MAY 2004 REVISED MARCH 2007
Single-Supply, High-Speed, Precision
LOGARITHMIC AMPLIFIER
www.ti.com
Copyright
20042007, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Q
1
200
R
1
(1)
1250
R
2
R
5
R
6
200
R3(1)
RREF
1250
R4
VO4(3)
IN
4
+IN4
V
LOGOUT
+IN5
IN
5
VO5
V
CM IN
I1
4
18
6
7
I
1 and I2 are current inputs
from a photodiode
or other current source
11
10
9(2)
14
5
3
15
13
12
16
VREF
2.5V
V
Com
V REF GND
Q
2
A
3
(4)
A
1
A2
A
4
LOG114
A
5
I
REF
I
2
V+
REF
NOTES: (1) Thermally dependent R1 and R3
provide temperature compensation.
(2) VLOGOUT = 0.375 × log(I1/I2).
(3) V
O4 =0.375 × K × log(I1/I2)
K= 1 + R6/R5.
(4) Differential Amplifier (A
3) Gain = 6.25
相關PDF資料 |
PDF描述 |
|---|---|
| LTC4075XEDD#TR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| LTC3835EUFD#PBF | 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PQCC20 |
| LM4040CYM3-2.5TR | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3 |
| LES10A48-5V0REJ | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| LT3467AIDDB#TRPBF | 2.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LOG114AIRGVRG4 | 功能描述:對數放大器 Prec High-Speed Logarithmic Amp RoHS:否 制造商:Texas Instruments 通道數量:3 帶寬:3 dB 共模抑制比（最小值）: 輸入補償電壓:+/- 7 mV 輸入電壓范圍（最大值）:5.5 V 工作電源電壓:4.5 V to 5.5 V 電源電流:+/- 15 mA 工作溫度范圍:- 40 C to +85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| LOG114AIRGVT | 功能描述:對數放大器 Precision High-Speed RoHS:否 制造商:Texas Instruments 通道數量:3 帶寬:3 dB 共模抑制比（最小值）: 輸入補償電壓:+/- 7 mV 輸入電壓范圍（最大值）:5.5 V 工作電源電壓:4.5 V to 5.5 V 電源電流:+/- 15 mA 工作溫度范圍:- 40 C to +85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| LOG114AIRGVTG4 | 功能描述:對數放大器 Prec High-Speed Logarithmic Amp RoHS:否 制造商:Texas Instruments 通道數量:3 帶寬:3 dB 共模抑制比（最小值）: 輸入補償電壓:+/- 7 mV 輸入電壓范圍（最大值）:5.5 V 工作電源電壓:4.5 V to 5.5 V 電源電流:+/- 15 mA 工作溫度范圍:- 40 C to +85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| LOG114EVM | 功能描述:放大器 IC 開發工具 LOG114 Eval Mod RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| LOG1527 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:由CMOS工藝設計制造的可內燒的學習碼編碼IC. |
發布緊急采購，3分鐘左右您將得到回復。