The LMH6739 is a very wideband, DC coupled monolithic selectable gain buffer designed specifically for ultra high resolution video systems as well as wide dynamic range systems requiring exceptional signal fidelity.
The LMH6739 is a DC‑coupled, selectable‑gain buffer designed for ultra‑high‑resolution video and wide‑dynamic‑range systems. It provides gains of –1, 1 and 2, and at a gain of +2 supports a 400 MHz 2 Vpp 3 dB bandwidth, making it suitable for high‑speed flash A/D and D/A converters, radar, and communication receivers.
Key features include a 750 MHz –3 dB small‑signal bandwidth, 2.3 nV/√Hz input‑referred noise, 3300 V/µs slew rate, 90 mA linear output current, low harmonic distortion (‑85 dBc at 20 MHz), and a compact 16‑pin SSOP package. The datasheet provides absolute maximum ratings, electrical characteristics, and performance graphs for frequency, time‑domain, distortion, and noise.
| Selectable Gains | -1, 1, 2 |
|---|---|
| -3 dB Bandwidth (Gain +1) | 750 MHz |
| Slew Rate | 3300 V/µs |
| Supply Current (All amps enabled) | 32 mA |
| Linear Output Current | 90 mA |
| Supply Voltage Range | 8 V to 12 V |
| Shutdown Current | 2 mA |
The LMH6739 provides three selectable gain settings: –1, 1, and 2.
At a gain of +2 the device supports a 400 MHz 3 dB bandwidth.
When all three amplifiers are enabled with no load, the typical supply current is 32 mA.