Analog Devices Inc. EVAL-AD608EBZ

Overview

EVAL-AD608EBZ from Analog Devices is an evaluation board for the AD608 low-power 3 V IF receiver subsystem IC, integrating a 500 MHz mixer, 110 dB limiting amplifier, and 80 dB RSSI with ±3° phase stability. It supports 10.7 MHz IF applications with 24 dB mixer gain, 400 mV p-p limiter output, and 20 mV/dB logarithmic slope - enabling rapid prototyping of PHS/GSM/TDMA receiver front-ends.

For engineers reviewing the EVAL-AD608EBZ datasheet, EVAL-AD608EBZ pinout, EVAL-AD608EBZ application, or EVAL-AD608EBZ equivalent, this board provides verified reference schematics, layout guidance, and test circuits for AD608-based IF signal chains - including mixer termination networks, offset-null feedback loop design, RSSI digitization interfaces, and power-down timing validation.

Technical Context

The EVAL-AD608EBZ implements the full functional block diagram of the AD608: RF/LO inputs feed a doubly balanced Gilbert-cell mixer (−15 dBm 1-dB compression, −5 dBm IP3), whose MXOP output drives a 330 Ω parallel-terminated 10.7 MHz BPF; the resulting IF signal feeds a five-stage 16 dB/stage logarithmic amplifier with successive-detection RSSI and hard-limited LMOP outputs.

Board-level features include on-board 330 Ω filter terminations, 18 nF/10 nF decoupling at VPS1/VPS2, 47 kΩ/100 Ω offset-null feedback network per Figure 23, PRUP-controlled 200 ns enable/disable, and VMID bias generation - all configured for industrial temperature operation (−40°C to +85°C) under 3 V supply.

Key Specifications

Availability

EVAL-AD608EBZ is available at Aetrix Electronics and suitable for RF receiver development, IF subsystem validation, and cellular base station RSSI measurement systems requiring stable component supply and traceable reference designs.

Supply support for EVAL-AD608EBZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing infrastructure spanning North America, Europe, and Asia.

The EVAL-AD608EBZ belongs to Analog Devices' RF & Microwave evaluation platform family, designed specifically to accelerate development of battery-powered and low-power IF receiver architectures for wireless communications infrastructure and portable instrumentation.

FAQ

What is the primary purpose of the EVAL-AD608EBZ evaluation board?

The EVAL-AD608EBZ is a fully assembled and tested evaluation platform for the AD608 IF receiver subsystem IC. It enables engineers to validate mixer linearity, RSSI accuracy, limiter phase stability, and power-down timing without designing custom PCBs - using pre-characterized component values for 10.7 MHz operation per Analog Devices' Figure 24 reference design.

Does the EVAL-AD608EBZ support frequencies other than 10.7 MHz?

Yes - the EVAL-AD608EBZ schematic and layout accommodate alternate IFs including 450 kHz, 455 kHz, and 6.5 MHz by modifying resistor and capacitor values in the offset-null feedback loop and filter termination network, as specified in Table 6 of the AD608 datasheet Rev. C. External low-pass filtering is required for sub-MHz IFs.

How is the RSSI output calibrated on the EVAL-AD608EBZ?

The EVAL-AD608EBZ implements the AD608's inherent RSSI transfer function: 0.2 V at −75 dBm IF input and 1.8 V at +5 dBm, yielding a nominal 20 mV/dB slope at 3 V supply. Calibration relies on the AD608's internal successive-detection architecture and two-pole postdemodulation LPF - no board-level trimming is required for ±1 dB accuracy across the specified input range.

What power supply requirements does the EVAL-AD608EBZ have?

The EVAL-AD608EBZ operates from a single 2.7 V to 5.5 V DC supply, with recommended 3 V operation matching the AD608's typical 21 mW power consumption. On-board decoupling uses 0.1 µF, 1 nF, and 10 nF capacitors at VPS1/VPS2 pins, and the PRUP logic input accepts standard CMOS voltage levels for power sequencing.

Can the EVAL-AD608EBZ be used to verify AD608 power-down functionality?

Yes - the EVAL-AD608EBZ includes direct access to the PRUP pin and provides oscilloscope test points for monitoring RSSI and LMOP transitions. It validates the AD608's 200 ns power-up response and 400 ns power-down to 300 μW, with measured limiter output settling within specification when driven by a CMOS logic source per Figure 8 and Figure 11 of the datasheet.