ADL5561/ADL5562/ADL5565/ADL5566/ADL5567/ADL5569 Differential Amplifiers

ADI's ADL5561, ADL5562, ADL5565, ADL5566, ADL5567, and ADL5569 are high-performance, differential amplifiers optimized for intermediate frequencies (IF) and DC applications. The ADL5561 and ADL5562 provide three gain levels of 6 dB, 12 dB, and 15.5 dB through a pin-strappable configuration. For the single-ended input configuration, the gains are reduced to 5.6 dB, 11.1 dB, and 14.1 dB. Using an external series input resistor expands the amplifier gain flexibility and allows for any gain selection from 0 dB to 15.5 dB. The amplifier offers low noise of 2.1 nV/√Hz and excellent distortion performance over a wide frequency range, making it an ideal driver for high-speed 8-bit to 16-bit ADCs.

The ADL5565 provides three gain levels of 6 dB, 12 dB, and 15.5 dB through a pin-strappable configuration. For the single-ended input configuration, the gains are reduced to 5.3 dB, 10.3 dB, and 13 dB. Using two external series resistors expands the gain flexibility of the amplifier and allow for any gain selection from 0 dB to 15.5 dB for a differential input and 0 dB to 13 dB for a single-ended input. The ADL5566 and ADL5567 provides a gain of 16 dB and 20 dB respectively. For the single-ended input configuration, the gain is reduced to 14 dB and 18 dB. Using two external series resistors for each amplifier expands the gain flexibility of the amplifier and allows for any gain selection from 0 dB to 16 dB/20 dB for a differential input and 0 dB to 14 dB/20 dB for a single-ended input. In addition, the amplifiers maintain low distortion down to output (VOCM) levels of 1.2 V/1.25 V providing an added capability for driving CMOS ADCs at AC levels up to 2 V_P-P.

With the use of two external series resistors for ADL5569, it expands the gain flexibility of the amplifier and allows any gain selection from 6 dB to 20 dB for a differential input. For a single-ended input, the gain can be adjusted from 6 dB to 17 dB with the addition of some external resistors. This device maintains low distortion through its output common-mode range of 2.0 V to 3.0 V, providing a flexible capability for driving ADCs with AC levels up to 2 V_P-P.

The ADL5562, ADL5565, ADL5566, ADL5567, and ADL5569 are ideally suited for use in high-performance zero-IF and complex IF receiver designs.