ADA4930-1 Datasheet

• Low input voltage noise: 1.2 nV/√Hz 
• Low common-mode output: 0.9 V on single supply
• Extremely low harmonic distortion
  • −104 dBc HD2 at 10 MHz 
  • −79 dBc HD2 at 70 MHz 
  • −73 dBc HD2 at 100 MHz 
  • −101 dBc HD3 at 10 MHz 
  • −82 dBc HD3 at 70 MHz 
  • −75 dBc HD3 at 100 MHz 
• See data sheet for additional features

• ADC drivers 
• Single-ended-to-differential converters 
• IF and baseband gain blocks 
• Differential buffers 
• Line drivers

The ADA4930-1 are very low noise, low distortion, high speed differential amplifiers. They are an ideal choice for driving 1.8 V high performance ADCs with resolutions up to 14 bits from dc to 70 MHz. The adjustable output common mode allows the ADA4930-1 to match the input of the ADC. The internal common-mode feedback loop provides exceptional output balance, suppression of even-order harmonic distortion products, and dc level translation.

With the ADA4930-1, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier.

The ADA4930-1 are fabricated using Analog Devices, Inc., proprietary silicon-germanium (SiGe), complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 1.2 nV/√Hz.

The low dc offset and excellent dynamic performance of the ADA4930-1/ADA4930-2 make them well suited for a wide variety of data acquisition and signal processing applications.

The ADA4930-1 is available in a Pb-free, 3 mm × 3 mm 16-lead LFCSP. The pinout has been optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4930-1 is specified to operate over the −40°C to +105°C temperature range.