Datasheet > LT1793

LT1793

更新时间： 2023-12-20 18:46:33

品牌	Logo	应用领域
亚德诺 - ADI		放大器运算放大器
页数	文件大小	规格书
12页	171K
描述
低噪声、微微安偏置电流、JFET 输入运算放大器

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中文翻译

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数据手册

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LT1793 数据手册

LT1793

Low Noise,

Picoampere Bias Current,

JFET Input Op Amp

FEATURES

DESCRIPTIO

The LT^®1793 achieves a new standard of excellence in

noiseperformanceforaJFETopamp.Forthefirsttimelow

voltage noise (6nV/√Hz) is simultaneously offered with

extremely low current noise (0.8fA/√Hz), providing the

lowest total noise for high impedance transducer applica-

tions. Unlike most JFET op amps, the very low input bias

current (3pA typ) is maintained over the entire common

moderangewhichresultsinanextremelyhighinputresis-

tance (10¹³Ω). When combined with a very low input ca-

pacitance (1.5pF) an extremely high input impedance

results, making the LT1793 the first choice for amplifying

low level signals from high impedance transducers. The

lowinputcapacitancealsoassureshighgainlinearitywhen

buffering AC signals from high impedance transducers.

■

Input Bias Current, Warmed Up: 10pA Max

■

100% Tested Low Voltage Noise: 8nV/√Hz Max

■

A Grade 100% Temperature Tested

■

Offset Voltage Over Temp: 1mV Max

Input Resistance: 10¹³Ω

■

Very Low Input Capacitance: 1.5pF

■

Voltage Gain: 1 Million Min

■

Gain-Bandwidth Product: 4.2MHz Typ

■

Guaranteed Specifications with ±5V Supplies

APPLICATIO S

■

Photocurrent Amplifiers

■

Hydrophone Amplifiers

■

High Sensitivity Piezoelectric Accelerometers

TheLT1793isunconditionallystableforgainsof1ormore,

even with 1000pF capacitive loads. Other key features are

250µV V_OSand a voltage gain over 4 million. Each indi-

vidual amplifier is 100% tested for voltage noise, slew rate

(3.4V/µs) and gain-bandwidth product (4.2MHz).

■

Low Voltage and Current Noise Instrumentation

Amplifier Front Ends

■

Two and Three Op Amp Instrumentation Amplifiers

■

Active Filters

, LTC and LT are registered trademarks of Linear Technology Corporation.

Specifications at ±5V supply operation are also provided.

ForanevenlowervoltagenoisepleaseseetheLT1792data

sheet.

TYPICAL APPLICATIO

Low Noise Light Sensor with DC Servo

2pF

1kHz Output Voltage Noise

Density vs Source Resistance

10k

–

100

LT1793

OUT

SOURCE

C2 0.022µF

1N914

–

100k

–

1N914

2N3904

LT1097

SOURCE

= 25°C

= ±15V

RESISTANCE

ONLY

HAMAMATSU

S1336-5BK

(908) 231-0960

10k 1k

100

1k 10k 100k 1M 10M

100M

–

1793 TA01

R2C2 > C1R1

SOURCE RESISTANCE (Ω)

= PARASITIC PHOTODIODE CAPACITANCE

= 100mV/µWATT FOR 200nm WAVE LENGTH

OUT

–

√

OP AMP

)

+ 4kTR + 2qI R

330mV/µWATT FOR 633nm WAVE LENGTH

1793 TA02

12 3 4 5 6 7...12

中文翻译

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与LT1793相关器件

型号	品牌	获取价格	描述	数据表
LT1793ACN8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793ACN8#PBF	Linear	获取价格	暂无描述
LT1793ACS8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793ACS8#TR	Linear	获取价格	LT1793 - Low Noise, Picoampere Bias Current, JFET Input Op Amp; Package: SO; Pins: 8; Temp
LT1793AIN8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793AIS8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793CN8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793CN8#PBF	Linear	获取价格	LT1793 - Low Noise, Picoampere Bias Current, JFET Input Op Amp; Package: PDIP; Pins: 8; Te
LT1793CS8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp
LT1793IN8	Linear	获取价格	Low Noise, Picoampere Bias Current, JFET Input Op Amp

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