Analog Devices Inc. ADA2200-EVALZ

Overview

ADA2200-EVALZ from Analog Devices is an evaluation board for the ADA2200 synchronous demodulator IC, designed to simplify amplitude and phase measurement of low-frequency AC signals in sensor interface applications. It supports I/Q demodulation via toggle switch, features USB-powered operation, on-board 400 kHz ceramic resonator, and provides differential or single-ended signal paths with 0 V to 3.3 V input/output range.

For engineers reviewing the ADA2200-EVALZ datasheet, ADA2200-EVALZ pinout, ADA2200-EVALZ application, or ADA2200-EVALZ equivalent, this board enables rapid validation of synchronous demodulation performance-including filter center frequency tuning (156.25 Hz–15.625 kHz), 10 Hz RC-filtered DC output measurement, and RCK/SYNCO synchronization signal generation-without custom PCB design.

Technical Context

The ADA2200-EVALZ implements a complete test environment for the ADA2200 sampled-analog synchronous demodulator, integrating ADP151 3.3 V LDO regulation, ECS ZTB400P 400 kHz ceramic resonator, AT24C02C EEPROM for boot configuration, and configurable jumpers (P5, P6, P13) for input mode and clock source selection. Signal routing supports both direct demodulated outputs (P11/P12) and filtered DC outputs (P7/P8).

It delivers synchronized demodulation using two key timing signals: RCK (f_CLK/64 = 6.25 kHz default) for input signal coherence, and SYNCO (f_CLK/8 = 50 kHz default) for output sampling alignment. The board supports I/Q switching via EEPROM_BOOT toggle and RESET, enabling orthogonal component extraction for full phasor reconstruction (A = √(I² + Q²), θ = sin⁻¹(Q/A)).

Key Specifications

Availability

ADA2200-EVALZ is available at Aetrix Electronics and suitable for precision sensor interface development, lock-in amplifier prototyping, and industrial transducer signal conditioning requiring stable component supply and fast time-to-test capability.

Supply support for ADA2200-EVALZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADA2200-EVALZ belongs to Analog Devices' precision signal conditioning evaluation platform family, engineered specifically to accelerate development of low-noise, low-drift sensor front-ends for applications demanding accurate amplitude and phase demodulation.

FAQ

What is the primary function of the ADA2200-EVALZ?

The ADA2200-EVALZ is an evaluation board designed exclusively to demonstrate and validate the ADA2200 synchronous demodulator IC. It enables engineers to perform amplitude and phase measurements on low-frequency AC signals-such as those from resistive, capacitive, or inductive sensors-using built-in I/Q demodulation, programmable filtering, and synchronization signals. The ADA2200-EVALZ simplifies lab testing by providing USB power, on-board clocking, and accessible test points without requiring custom hardware.

How does the ADA2200-EVALZ support both I and Q demodulation components?

The ADA2200-EVALZ supports I and Q demodulation through its EEPROM_BOOT toggle switch and RESET button. In default mode, the ADA2200-EVALZ boots from internal registers and outputs the in-phase (I) component. When the switch is set to EEPROM_BOOT and RESET is pressed, the ADA2200 loads factory-configured EEPROM contents that enable quadrature (Q) demodulation instead. This allows users to capture orthogonal signal components for full phasor analysis-critical for extracting both amplitude and phase from unknown signals.

What clock options are available on the ADA2200-EVALZ?

The ADA2200-EVALZ offers two clock sources: an on-board 400 kHz ceramic resonator (ECS ZTB400P) and an external CLKIN input via P4. By default, jumper P13 connects Pins 2–3 to select the internal oscillator, setting the ADA2200's band-pass filter center at 6.25 kHz (f_CLK/64). To use an external clock, P13 is reconfigured to Pins 1–2. Valid external frequencies range from 10 kHz to 1 MHz, enabling filter center tuning from 156.25 Hz to 15.625 kHz while maintaining constant Q = 1.7.

Can the ADA2200-EVALZ be powered solely via USB?

Yes, the ADA2200-EVALZ is fully USB-powered via the mini-B connector (P1), drawing 5 V from any standard USB port. On-board ADP151AUJZ-3.3-R7 LDO regulates this to a clean 3.3 V supply for the ADA2200 and supporting circuitry. The green LED (DS1) illuminates when power is applied. Alternative +5 V/GND test points adjacent to the USB port allow bench supply use if needed-but USB alone satisfies all operational requirements for evaluation, including signal generation, demodulation, and filtering.

What types of measurements can be performed directly using the ADA2200-EVALZ?

The ADA2200-EVALZ supports three direct measurement modes: (1) Oscilloscope probing at P11/P12 for real-time demodulated AC waveforms; (2) DMM measurement across P7/P8 for 10 Hz filtered DC output voltage-enabling amplitude/phase quantification without post-processing; and (3) RCK/SYNCO signal monitoring for synchronization verification. These capabilities let users characterize signal dependence on amplitude and phase (per Figure 4 in UG-702) and compute full phasor magnitude (A = √(I² + Q²)) and angle (θ = sin⁻¹(Q/A)) using two successive I/Q captures.