Analog Devices Inc. EVAL-AD7761FMCZ

Overview

EVAL-AD7761FMCZ from Analog Devices is a fully featured evaluation board for the AD7761 16-bit, 8-channel, simultaneous-sampling sigma-delta ADC operating up to 256 kSPS with power-scaling modes (Fast/Median/Focus), integrated ADA4896-2 front-end amplifiers, and ADR444 4.096 V precision reference - designed for high-fidelity data acquisition in test instrumentation and audio analysis systems.

For engineers reviewing the EVAL-AD7761FMCZ datasheet, EVAL-AD7761FMCZ setup, EVAL-AD7761FMCZ software compatibility, or EVAL-AD7761FMCZ hardware interface requirements, this page provides verified configuration details, required external equipment (EVAL-SDP-CH1Z, 7–9 V supply, USB 2.0 PC), and functional validation of SPI-controlled register access, time/frequency domain analysis, and standalone analog input routing via SMB/terminal blocks.

Technical Context

The EVAL-AD7761FMCZ implements a hardware-software co-design architecture: it interfaces exclusively with the EVAL-SDP-CH1Z system demonstration platform via a 120-pin VITA 57 connector (P1), enabling bidirectional SPI configuration (SL1 = Position A) and parallel 8-bit DOUT data streaming. Power is derived from an external 7–9 V source regulated by ADP7118 LDOs to generate 5 V (AVDD1, reference, amplifiers) and 3.3 V (IOVDD).

Analog signal conditioning includes selectable ADA4896-2 gain=1 buffers per channel (SL0+ through SL7+), configurable common-mode bias (SL15), dual reference paths (ADR444 → ADA4841-1 or direct), and flexible clock sourcing (CMOS oscillator Y2, crystal Y1, or SDP MCLK via SL4/SL4A), all validated in UG-949 Rev. 0.

Key Specifications

Availability

EVAL-AD7761FMCZ is available at Aetrix Electronics and suitable for high-precision ADC evaluation, mixed-signal test bench development, and sigma-delta converter qualification requiring stable component supply and full documentation traceability.

Supply support for EVAL-AD7761FMCZ 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 EVAL-AD7761FMCZ belongs to Analog Devices' precision data acquisition evaluation platform family, engineered to accelerate validation of high-resolution, multi-channel sigma-delta ADCs in metrology-grade and audio test applications.

FAQ

What is the required host hardware to operate the EVAL-AD7761FMCZ?

The EVAL-AD7761FMCZ requires the EVAL-SDP-CH1Z system demonstration platform as a mandatory interface bridge. It also needs a Windows PC with USB 2.0 port, 7–9 V external power supply (via J1 or J3), and compatible signal sources (e.g., Audio Precision®). The EVAL-AD7761FMCZ does not operate standalone - all configuration and data capture depend on the SDP-H1 platform and AD7761 evaluation software.

Does the EVAL-AD7761FMCZ support both AC and DC analog inputs?

Yes, the EVAL-AD7761FMCZ supports both AC and DC analog inputs via dual routing options: SMB connectors (AI0+ to AI7+, AI0− to AI7−) for AC-coupled signals and terminal blocks (J8/J9/J13/J14) for DC-coupled connections. Input range defaults to 0 V to 4.096 V using the ADR444 reference, and common-mode bias is configurable via SL15 between OP2177-buffered VCM and AD7761's internal VCM output.

Can the EVAL-AD7761FMCZ be powered directly from the EVAL-SDP-CH1Z board?

No - the EVAL-SDP-CH1Z supplies only 12 V to the EVAL-AD7761FMCZ (via LK2 = Position A), but the evaluation board's internal LDOs require 7–9 V input to generate its 5 V and 3.3 V rails. Therefore, the EVAL-AD7761FMCZ must be powered externally via J1 or J3; the 12 V from SDP is insufficient and unsupported for direct LDO operation per UG-949 Table 3.

What are the default filter and sampling mode settings for the EVAL-AD7761FMCZ?

The EVAL-AD7761FMCZ defaults to the AD7761's Wideband digital filter (low-ripple, antialiasing, sharp roll-off) and Fast mode (256 kSPS, 110.8 kHz input bandwidth, 52 mW/channel), as configured by the AD7761 evaluation software at startup. Filter selection (Wideband or sinc5) and decimation rate (32–1024) are software-controllable via SPI register writes - no hardware jumpers define these parameters.

Is the EVAL-AD7761FMCZ compatible with other SDP platforms besides EVAL-SDP-CH1Z?

No - the EVAL-AD7761FMCZ is mechanically and electrically designed specifically for the EVAL-SDP-CH1Z (SDP-H1) platform, mating via its 120-pin VITA 57 P1 connector. Analog Devices documentation (UG-949) explicitly lists only EVAL-SDP-CH1Z as compatible; no firmware, pinout, or driver support exists for SDP-B, SDP-K1, or third-party controllers.