ADA4930-1YCPZ-R7

The ADA4930-1/ADA4930-2 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/ADA4930-2 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/ADA4930-2, 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/ADA4930-2 are fabricated using 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.

Applications

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

Key features

• 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
• High speed: −3 dB bandwidth of 1.35 GHz, G = 7; Slew rate: 3400 V/μs, 25% to 75%; 0.1 dB gain flatness to 380 MHz; Fast overdrive recovery of 1.5 ns
• 0.5 mV typical offset voltage
• Externally adjustable gain
• Differential-to-differential or single-ended-to-differential operation
• Adjustable output common-mode voltage
• Single-supply operation: 3.3 V or 5 V