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> THS4509 wideband 1.9GHZ differential opamp lo noise (4
THS4509 wideband 1.9GHZ differential opamp lo noise (4
Burr-Brown / Texas Instruments.
Fully Differential Architecture
Centered Input Common-mode Range
Input Voltage Noise: 1.9 nV/rtHz (f >10 MHz)
Power Supply Voltage: 3 V to 5 V
5 V Data Acquisition Systems High Linearity ADC Amplifier
The THS4509 is a wideband, fully differential op amp designed for 5-V data acquisition systems. It has a low noise at 1.9 nV/rtHz, and low harmonic distortion of -75 dBc HD2 and -80 dBc HD3 at 100 MHz with 2 Vpp, G = 10 dB, and 1 kohm load. Slew rate is high at 6600 Vµs, and with settling time of 2 ns to 1% (2 V step), it is ideal for pulsed applications. It is designed for minimum gain of 6 dB, but is optimized for gain of 10 dB.
To allow for dc coupling to ADCs, its unique output common-mode control circuit maintains the output common-mode voltage within 3 mV offset (typ) from the set voltage, when set within 0.5 V of mid-supply, with less than 4 mV differential offset voltage. The common-mode set point is set to mid-supply by internal circuitry, which may be over-driven from an external source.
The input and output are optimized for best performance with their common-mode voltages set to mid-supply. Along with high performance at low power supply voltage, this makes 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 16-pin leadless QFN package (RGT), and is characterized for operation over the full industrial temperature range from -40°C to 85°C.
US: $3.75 Canada: $4.50 International: $5.50 Lowest cost option.
2-nd item: S&H 75% less than first (or 25% of first)
items 3-5: S&H 80% less than first (or 20% of first)
items 6-10: S&H 90% less than first (or 10% of first)
