THS4509 Texas instruments

THS4509

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THS4509

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Описание

The THS4509 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
APPLICATIONS
- 5-V Data Acquisition Systems High Linearity ADC Amplifiers
- Wireless Communication
- Medical Imaging
- Test and Measurement

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2nd harmonic (dBc)	104
3rd harmonic (dBc)	108
Frequency of harmonic distortion measurement (MHz)	10
Architecture	Bipolar, Fully Differential ADC Driver
BW at Acl (MHz)	2000
Features	Decompensated, Shutdown
Number of channels	1
Operating temperature range (°C)	-40 to 85
Rating	Catalog
Type	RF FDA
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	3
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.25