The AD8309-EVALZ is an evaluation board designed to allow easy evaluation of all features of AD8309 logarithmic amplifier. The AD8309 is a complete IF limiting amplifier, providing both an accurate logarithmic (decibel) measure of the input signal (the RSSI function) over a dynamic range of 100dB and a programmable limiter output useful from 5MHz to 500MHz. This logarithmic amplifier is based on the successive detection technique. It provides a dynamic range of 100dB with an accuracy of ±0.4dB over the central 80dB and operates up to 500MHz. The logarithmic output is proportional to the logarithm of the input signal, providing a 0.4V to 2.5V DC signal over the 100dB input range. A limiter output is also provided which amplifies the input signal by 100dB, providing a stable limited output with a maximum of ±100ps phase skew. This limiter output is useful for demodulating FSK and PSK modulated signals.
● Dynamic range from -78dBm to +22dBm
● Stable RSSI scaling over temperature and supplies
● 20mV/dB slope and -95dBm intercept
● ±0.4dB RSSI linearity up to 200MHz
● Programmable limiter gain and output current
● Differential outputs to 10mA, 2.4Vpp
● Constant phase (typical 680ps delay skew)
● Fully differential inputs
● 500ns power up time and less than 1mA sleep current
● Single supply of +2.7V to +6.5V at 16mA typical
●ESD sensitive device, take proper precaution while handling the device.
