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XPGA849RGTR中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書
| 廠商型號(hào) |
XPGA849RGTR |
| 功能描述 | PGA849 Low-Noise, Wide-Bandwidth, Precision Programmable Gain Instrumentation Amplifier |
| 文件大小 |
3.93725 Mbytes |
| 頁面數(shù)量 |
40 頁 |
| 生產(chǎn)廠商 | Texas Instruments |
| 企業(yè)簡稱 |
TI【德州儀器】 |
| 中文名稱 | 美國德州儀器公司官網(wǎng) |
| 原廠標(biāo)識(shí) |  |
| 數(shù)據(jù)手冊 | |
| 更新時(shí)間 | 2025-5-1 14:00:00 |
| 人工找貨 | XPGA849RGTR價(jià)格和庫存，歡迎聯(lián)系客服免費(fèi)人工找貨 |
XPGA849RGTR規(guī)格書詳情
1 Features
? Differential to single-ended conversion
? Eight pin-programmable binary gains
– G (V/V) = ?, ?, ?, 1, 2, 4, 8, and 16
? Low gain error drift: ±2ppm/°C (maximum)
? Faster signal processing:
– Wide bandwidth: 10MHz at all gains
– High slew rate: 35V/μs at G ≥ ? V/V
– Settling time:
700ns to 0.01%, 950ns to 0.0015%
– Input stage noise: 8.6nV/√Hz at G = 16V/V
– Filter option to achieve better SNR
? Input overvoltage protection to ±40V beyond
supplies
? Input-stage supply range:
– Single supply: 8V to 36V
– Dual supply: ±4V to ±18V
? Independent output power-supply pins
? Output-stage supply range:
– Single supply: 4.5V to 36V
– Dual supply: ±2.25V to ±18V
? Specified temperature range: –40°C to +125°C
? Small package: 3mm × 3mm QFN
2 Applications
? Factory automation and control
? Analog input module
? Data acquisition (DAQ)
? Test and measurement
? Parametric measurement unit (PMU)
3 Description
The PGA849 is a wide-bandwidth, low-noise
programmable gain instrumentation amplifier for
differential-to-single-ended conversion. The PGA849
is equipped with eight binary gain settings, from an
attenuating gain of 0.125V/V to a maximum of 16V/V,
using three digital gain selection pins.
The PGA849 architecture is optimized to drive
inputs of high-resolution, precision analog-to-digital
converters (ADCs) with sampling rates up to 1MSPS
without the need for an additional ADC driver. The
output-stage power supplies are decoupled from the
input stage to protect the ADC or downstream devices
against overdrive damage.
The super-beta input transistors offer an impressively
low input bias current, which in turn provides a
very low input current noise density of 0.3pA/√Hz,
making the PGA849 a versatile choice for virtually
any sensor type. The low-noise current-feedback
front-end architecture offers exceptional gain flatness
even at high frequencies, making the PGA849 an
excellent high-impedance sensor readout device.
Integrated protection circuitry on the input pins
handles overvoltages of up to ±40V beyond the
power-supply voltages.
