LT1793 Low Noise, Picoampere Bias Current, JFET Input Op Amp
The LT®1793 achieves a new standard of excellence in noise performance for a JFET op amp. For the first time low voltage noise (6nV/rtHz) is simultaneously offered with extremely low current noise (0.8fA/rtHz), providing the lowest total noise for high impedance transducer applications. Unlike most JFET op amps, the very low input bias current (3pA typ) is maintained over the entire common mode range which results in an extremely high input resistance (1013 ohms). When combined with a very low input capacitance (1.5pF) an extremely high input impedance results, making the LT1793 the first choice for amplifying low level signals from high impedance transducers. The low input capacitance also assures high gain linearity when buffering AC signals from high impedance transducers. The LT1793 is unconditionally stable for gains of 1 or more, even with 1000pF capacitive loads. Other key features are 250µV VOS and a voltage gain over 4 million. Each individual amplifier is 100% tested for voltage noise, slew rate (3.4V/µs) and gain-bandwidth product (4.2MHz). Specifications at ±5V supply operation are also provided. For an even lower voltage noise please see the LT1792 data sheet
产品特点 Features
- Input Bias Current, Warmed Up: 10pA Max
- 100% Tested Low Voltage Noise: 8nV/rtHz Max
- A Grade 100% Temperature Tested
- Offset Voltage Over Temp: 1mV Max
- nput Resistance: 1013 ohms
- Very Low Input Capacitance: 1.5pF
- Voltage Gain: 1 Million Min
- Gain-Bandwidth Product: 4.2MHz Typ
- Guaranteed Specifications with ±5V Supplies
参数
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应用
- Photocurrent Amplifiers
- Hydrophone Amplifiers
- High Sensitivity Piezoelectric Accelerometers
- Low Voltage and Current Noise Instrumentation Amplifier Front Ends
- Two and Three Op Amp Instrumentation Amplifiers
- Active Filters
典型应用图
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LT1793 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LT1793ACN8 |
PDIP |
8 |
C |
$3.95 |
$3.35 |
| LT1793ACN8#PBF |
PDIP |
8 |
C |
$3.95 |
$3.35 |
| LT1793ACS8 |
SO |
8 |
C |
$3.95 |
$3.35 |
| LT1793ACS8#PBF |
SO |
8 |
C |
$3.95 |
$3.35 |
| LT1793ACS8#TR |
SO |
8 |
C |
|
$3.41 |
| LT1793ACS8#TRPBF |
SO |
8 |
C |
|
$3.41 |
| LT1793AIN8 |
PDIP |
8 |
I |
$5.00 |
$4.25 |
| LT1793AIN8#PBF |
PDIP |
8 |
I |
$5.00 |
$4.25 |
| LT1793AIS8 |
SO |
8 |
I |
$5.00 |
$4.25 |
| LT1793AIS8#PBF |
SO |
8 |
I |
$5.00 |
$4.25 |
| LT1793AIS8#TR |
SO |
8 |
I |
|
$4.31 |
| LT1793AIS8#TRPBF |
SO |
8 |
I |
|
$4.31 |
| LT1793CN8 |
PDIP |
8 |
C |
$2.75 |
$2.25 |
| LT1793CN8#PBF |
PDIP |
8 |
C |
$2.75 |
$2.25 |
| LT1793CS8 |
SO |
8 |
C |
$2.75 |
$2.25 |
| LT1793CS8#PBF |
SO |
8 |
C |
$2.75 |
$2.25 |
| LT1793CS8#TR |
SO |
8 |
C |
|
$2.31 |
| LT1793CS8#TRPBF |
SO |
8 |
C |
|
$2.31 |
| LT1793IN8 |
PDIP |
8 |
I |
$3.80 |
$3.15 |
| LT1793IN8#PBF |
PDIP |
8 |
I |
$3.80 |
$3.15 |
| LT1793IS8 |
SO |
8 |
I |
$3.80 |
$3.15 |
| LT1793IS8#PBF |
SO |
8 |
I |
$3.80 |
$3.15 |
| LT1793IS8#TR |
SO |
8 |
I |
|
$3.21 |
| LT1793IS8#TRPBF |
SO |
8 |
I |
|
$3.21 |
LT1793 数据手册及相关资料下载
- 数据手册(英文) : LT1793 - Low Noise, Picoampere Bias Current, JFET Input Op Amp.PDF
- 设计要点 (英文) : DN219 - 24-Bit ADC Measures from DC to Daylight.PDF
- 设计要点 (英文) : DN254 - LT1806: 325MHz Low Noise Rail-to-Rail SOT-23 Op Amp Saves Board Space.PDF
- 可靠性数据 : R408 Reliability Data .PDF
- LT Journal : May 2001 1MW Transimpedance Amplifier Achieves Near-Theoretical Noise Performance, 2.4GHz Gain Bandwidth, with Large-Area Photodiodes.PDF
- LT Journal : Sep 1999 Four New Amplifiers Serve Many Applications.PDF
- LT Journal : September 1999 - JFET Op Amps Equal Low Noise Bipolars and Have Picoamp Current Noise.PDF
