AD9874ABST

Product Summary

The AD9874ABST is a general-purpose IF subsystem that digitizes a low level 10 MHz–300 MHz IF input with a signal bandwidth ranging from 6.8 kHz to 270 kHz. The signal chain of the AD9874ABST consists of a low noise amplifier, a mixer, a band-pass sigma-delta analog-to-digital converter, and a decimation filter with programmable decimation factor. An automatic gain control (AGC) circuit gives the AD9874ABST 12 dB of continuous gain adjustment. Auxiliary blocks include both clock and LO synthesizers. The applications of the AD9874ABST include Multimode Narrowband Radio Products, Analog/Digital UHF/VHF FDMA Receivers, TETRA, APCO25, GSM/EDGE, Portable and Mobile Radio Products, Base Station Applications.

Parametrics

AD9874ABST absolute maximum ratings: (1)VDDF, VDDA, VDDC, VDDD, VDDH, VDDL, VDDI: -0.3V to +4.0V; (2)VDDF, VDDA, VDDC, VDDD, VDDH, VDDL, VDDI: -4.0V to +4.0V; (3)VDDP, VDDQ: -0.3V to +6.0V; (4)GNDF, GNDA, GNDC, GNDD, GNDH, GNDL, GNDI, GNDQ, GNDP, GNDS: -0.3V to +0.3V; (5)MXOP, MXON, LOP, LON, IFIN, CXIF, CXVL, CXVM: -0.3V to VDDI; (6)0.3V; (7)PC, PD, PE, CLKOUT, DOUTA, DOUTB, FS, SYNCB: -0.3V to VDDH; (8)0.3V; (9)IF2N, IF2P, GCP, GCN: –0.3V to VDDF + 0.3V; (10)VREFP, VREFN, RREF GNDA: –0.3 to VDDA + 0.3 V; (11)IOUTC GNDQ: –0.3 to VDDQ + 0.3 V; (12)IOUTL GNDP: –0.3 to VDDP + 0.3 V; (13)CLKP, CLKN GNDC: –0.3 to VDDC + 0.3 V; (14)FREF GNDL: –0.3 to VDDL + 0.3 V; (15)Junction Temperature: 150℃; (16)Storage Temperature: –65 to +150℃; (17)Lead Temperature (10 sec): 300℃.

Features

AD9874ABST features: (1)10 MHz–300 MHz Input Frequency; (2)6.8 kHz–270 kHz Output Signal Bandwidth; (3)8.1 dB SSB NF; (4)0 dBm IIP3; (5)AGC Free Range up to –34 dBm; (6)12 dB Continuous AGC Range; (7)16 dB Front End Attenuator; (8)Baseband I/Q 16-bit (or 24-bit) Serial Digital Output; (9)LO and Sampling Clock Synthesizers; (10)Programmable Decimation Factor, Output Format,; (11)AGC, and Synthesizer Settings; (12)370Ω Input Impedance; (13)2.7 V–3.6 V Supply Voltage; (14)Low Current Consumption: 20 mA; (15)48–Lead LQFP Package (1.4 mm Thick).

Diagrams