This document describes the features and characteristics of the AD9874 IF Digitizing Subsystem, including input frequency range, output signal bandwidth, noise figure, input impedance, supply voltage, etc.
The AD9874 is a general‑purpose IF digitizing subsystem that accepts 10 MHz to 300 MHz input frequencies and delivers 7.2 kHz to 270 kHz output bandwidth. It integrates a low‑noise amplifier, mixer, band‑pass sigma‑delta ADC, programmable decimation filter and AGC, with SPI programmable parameters for flexible system integration.
The datasheet includes detailed specifications, absolute maximum ratings, pin descriptions, test methods, typical performance curves, ordering information and revision history, helping designers evaluate and implement the device in multimode radio, SATCOM, base‑station and portable applications.
| Input Frequency Range | 10 MHz to 300 MHz |
|---|---|
| Output Signal Bandwidth | 7.2 kHz to 270 kHz |
| SSB Noise Figure | 8.1 dB |
| Input Third‑Order Intercept (IIP3) | 0 dBm |
| Supply Voltage | 2.7 V to 3.6 V |
| Current Consumption (high performance) | 20 mA |
| Package | 48‑Lead LQFP (1.4 mm thick) |
| Operating Temperature Range | -40 °C to +85 °C |
The AD9874 accepts input frequencies from 10 MHz to 300 MHz.
The device operates from a supply voltage of 2.7 V to 3.6 V.
The AD9874 has an input third‑order intercept (IIP3) of 0 dBm.
It is supplied in a 48‑lead low‑profile quad flat package (LQFP).