THS4509

宽带运算放大器

The device is a wideband, fully-differential op amp designed for 5-V data acquisition systems. It has a low noise at 1.9 nV/√Hz, and low harmonic distortion of –75 dBc HD2 and –80 dBc HD3 at 100 MHz with 2 VPP, G = 10 dB, and 1-kΩ load. Slew rate is high at 6600 V/µs, and with settling time of 2 ns to 1% 2-V step, it is ideal for pulsed applications. It is designed for a minimum gain of 6 dB, but is optimized for gains of 10 dB.

To allow for DC coupling to analog-to-digital converters ADCs, its unique output common-mode control circuit maintains the output common-mode voltage within 3-mV offset typical from the set voltage, when set within 0.5-V of midsupply, with less than 4-mV differential offset voltage. The common-mode set point is set to midsupply by internal circuitry, which may be overdriven from an external source.

The input and output are optimized for best performance with the common-mode voltages set to midsupply. Along with high performance at low power-supply voltage, this design makes it ideal for high-performance, single-supply 5-V data acquisition systems. The combined performance of the THS4509 in a gain of 10 dB driving the ADS5500 ADC, sampling at 125 MSPS, is 81-dBc SFDR and 69.1-dBc SNR with a –1 dBFS signal at 70 MHz.

The THS4509 is offered in a quad, leadless VQFN-16 package RGT, and is characterized for operation over the full industrial temperature range from –40°C to +85°C.

.

Fully-Differential Architecture

.

Centered Input Common-Mode Range

.

Output Common-Mode Control

.

Minimum Gain of 2 V/V 6 dB

.

Bandwidth: 1900 MHz

.

Slew Rate: 6600 V/µs

.

1% Settling Time: 2 ns

.

HD2: –75 dBc at 100 MHz

.

HD3: –80 dBc at 100 MHz

.

OIP3: 37 dBm at 70 MHz

.

Input Voltage Noise: 1.9 nV/√Hz f > 10 MHz

.

Power-Supply Voltage: 3 V to 5 V

.

Power-Supply Current: 37.7 mA

.

Power-Down Current: 0.65 mA

.

APPLICA ONS

.

5-V Data Acquisition Systems High Linearity ADC Amplifiers

.

Wireless Communication

.

Medical Imaging

.

Test and Measurement

All other trademarks are the property of their respective owners