AD604屬于開發(fā)板套件編程器的評估板-運算放大器。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD604評估板 - 運算放大器運算放大器評估板是裝有元器件的電路，用于提供特定集成電路或器件的工作實例。該產(chǎn)品族中的電路板提供了運算放大器實例。每個 IC 的通道類型有單通道、雙通道、三通道、四通道和八通道，放大器類型包括音頻、自動歸零、緩沖器、斬波器、電流反饋、電流檢測、差動、差分、四通道、儀表、隔離、J-FET、限幅、對數(shù)、功率、可編程增益、采樣保持、跨阻、可變增益、視頻、電壓反饋和零漂移。

GENERAL DESCRIPTION

The AD604 is an ultralow noise, very accurate, dual-channel, linear-in-dB variable gain amplifier (VGA) optimized for time based variable gain control in ultrasound applications; however, it supports any application requiring low noise, wide bandwidth, variable gain control. Each channel of the AD604 provides a 300 kΩ input resistance and unipolar gain control for ease of use. User-determined gain ranges, gain scaling (dB/V), and dc level shifting of output further optimize performance.

Each channel of the AD604 uses a high performance preamplifier that provides an input-referred noise voltage of 0.8 nV/√Hz. The very accurate linear-in-dB response of the AD604 is achieved with the differential input exponential amplifier (DSX-AMP) architecture. Each of the DSX-AMPs comprises a variable attenuator of 0 dB to 48.36 dB followed by a high speed fixed gain amplifier. The attenuator is a 7-stage R-1.5R ladder network. The attenuation between tap points is 6.908 dB and 48.36 dB for the ladder network.

FEATURES

Ultralow input noise at maximum gain

0.80 nV/√Hz, 3.0 pA/√Hz

2 independent linear-in-dB channels

Absolute gain range per channel programmable

0 dB to 48 dB (preamplifier gain = 14 dB) through 6 dB to

54 dB (preamplifier gain = 20 dB)

±1.0 dB gain accuracy

Bandwidth: 40 MHz (?3 dB)

Input resistance: 300 kΩ

Variable gain scaling: 20 dB/V through 40 dB/V

Stable gain with temperature and supply variations

Single-ended unipolar gain control

Power shutdown at lower end of gain control

Drive ADCs directly

APPLICATIONS

Ultrasound and sonar time gain controls

High performance AGC systems

Signal measurement