THS4509 1.9-GHz, Wideband, Low-Noise, Low-Distortion, Fully-Differential Amplifier | TI.com

THS4509
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1.9-GHz, Wideband, Low-Noise, Low-Distortion, Fully-Differential Amplifier

 

Description

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.

Features

  • 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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Parametrics

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Part number Order 2nd harmonic (dBc) 3rd harmonic (dBc) @ MHz Acl, min spec gain (V/V) Approx. price (US$) Architecture BW @ Acl (MHz) Device type Features GBW (Typ) (MHz) Number of channels (#) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Slew rate (Typ) (V/us) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) Vn at flatband (Typ) (nV/rtHz) Vn at 1 kHz (Typ) (nV/rtHz) Vos (offset voltage @ 25 C) (Max) (mV)
THS4509 Order now 104     108     10     2     3.50 | 1ku     Fully Differential ADC Driver     2000     RF FDA     Shutdown
Decompensated    
3000     1     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     6600     3     5.25     1.9     10     4    
THS4508 Samples not available 104     105     10     2     5.18 | 1ku     Fully Differential ADC Driver     2000     RF FDA     Shutdown
Decompensated    
3000     1     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     6400     3.75     5.25     2.3     2.3     4    
THS4511 Samples not available 117     106     10     1     5.45 | 1ku     Fully Differential ADC Driver     1600     RF FDA     Shutdown     2000     1     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)     4900     3.75     5.25     2     20     4    
THS4513 Order now 110     108     10     1     4.47 | 1ku     Fully Differential ADC Driver     1600     RF FDA     Shutdown     2800     1     -40 to 85     VQFN | 16     16VQFN: 9 mm2: 3 x 3 (VQFN | 16)