Analog Devices Inc. EVAL-AD7175-8SDZ

Overview

EVAL-AD7175-8SDZ from Analog Devices is a full-featured evaluation board for the AD7175-8 24-bit, 250 kSPS sigma-delta ADC with integrated analog input buffers, on-board 5 V/3.3 V LDO regulation, and external amplifier evaluation capability. It supports PC-based control via SDP-B (EVAL-SDP-CB1Z), standalone operation, and noise performance testing using on-board shorting links.

For engineers reviewing the EVAL-AD7175-8SDZ datasheet, EVAL-AD7175-8SDZ pinout, EVAL-AD7175-8SDZ application, or EVAL-AD7175-8SDZ equivalent, this board enables rapid validation of high-precision DC and low-frequency AC signal acquisition in sensor interface, industrial process control, and precision instrumentation systems.

Technical Context

The EVAL-AD7175-8SDZ implements direct SPI communication with the AD7175-8 via CS, SCLK, DIN, and DOUT/RDY signals routed through a 120-pin Hirose connector to the SDP-B controller board. Power sequencing is managed by on-board ADP1720 (5 V/3.3 V) and ADP7104 (5 V) LDOs, supporting single-supply (7–9 V regulated), unregulated, and split-supply (±2.5 V) configurations.

Analog inputs are accessible via J10/J12/J14 terminal blocks and A0–A3 SMB/SMA jacks, all directly connected to AD7175-8 pins when LK5–LK20 are removed. Reference selection includes internal 2.5 V and external 5 V ADR445, configurable via SETUPCONx registers in the AD717x Eval+ software.

Key Specifications

Availability

EVAL-AD7175-8SDZ is available at Aetrix Electronics and suitable for precision sensor interface, industrial process monitoring, laboratory instrumentation calibration, and high-resolution data acquisition system development requiring stable component supply and validated reference design support.

Supply support for EVAL-AD7175-8SDZ 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, with deep expertise in precision data conversion and sensor signal conditioning.

The EVAL-AD7175-8SDZ belongs to Analog Devices' AD717x evaluation platform family, designed specifically to accelerate prototyping and performance validation of high-accuracy, low-noise sigma-delta ADCs used in industrial, scientific, and medical measurement applications.

FAQ

What is the primary function of the EVAL-AD7175-8SDZ?

The EVAL-AD7175-8SDZ is an evaluation board for the AD7175-8 24-bit, 250 kSPS sigma-delta ADC. It provides complete hardware and software infrastructure-including on-board power regulation, analog input routing, reference options, and AD717x Eval+ software-to validate ADC performance in precision DC and low-frequency AC measurement applications. The EVAL-AD7175-8SDZ enables both PC-connected and standalone testing modes.

Which controller board is required to operate the EVAL-AD7175-8SDZ?

The EVAL-AD7175-8SDZ requires the EVAL-SDP-CB1Z (SDP-B) system demonstration platform controller board for USB-based PC communication. The SDP-B connects to the EVAL-AD7175-8SDZ via a 120-way Hirose FX8 connector and handles SPI protocol translation, power delivery, and firmware interface. Without SDP-B, the EVAL-AD7175-8SDZ can operate in standalone mode only after removing R9–R13 to access raw SPI signals.

Does the EVAL-AD7175-8SDZ support split-supply operation?

Yes, the EVAL-AD7175-8SDZ supports split-supply operation with ±2.5 V analog supplies. This requires removing solder links SL12–SL15 to isolate AVSS from AGND, setting LK1 to Position B for 2.5 V AVDD1 compatibility, and connecting −2.5 V to J3 or J5. The board's power configuration table explicitly defines split-supply (regulated/unregulated) modes, and the AD717x Eval+ software correctly models performance under these conditions.

How is the reference voltage selected on the EVAL-AD7175-8SDZ?

Reference selection on the EVAL-AD7175-8SDZ is performed entirely in software via the AD717x Eval+ GUI. Users configure SETUPCONx registers (Setup 0–7) to choose between the internal 2.5 V reference or the external 5 V ADR445. The external reference is default and physically present on the board; switching requires no hardware changes-only register writes through the SPI interface managed by the SDP-B and EVAL-AD7175-8SDZ.

Can the EVAL-AD7175-8SDZ be used without connecting hardware?

Yes, the EVAL-AD7175-8SDZ supports full simulation mode within the AD717x Eval+ software. When launched without hardware, users can select "Simulation" and choose from multiple AD717x-family devices (including AD7175-8) to model register behavior, waveform response, histogram distribution, and noise performance-enabling pre-hardware design verification, training, and algorithm development independent of physical board availability.