Analog Devices Inc. EVAL-AD7658SDZ

Overview

EVAL-AD7658SDZ from Analog Devices is a full-featured evaluation board designed to characterize the AD7658 - a 12-bit, 6-channel, 250 kSPS simultaneous-sampling SAR ADC with bipolar input capability and on-chip reference. It supports SDP-controlled operation via EVAL-SDP-CB1Z and standalone analog signal acquisition, enabling rapid validation of high-precision data acquisition in industrial process control and power quality monitoring.

For engineers reviewing the EVAL-AD7658SDZ datasheet, EVAL-AD7658SDZ pinout, EVAL-AD7658SDZ application, or EVAL-AD7658SDZ equivalent, this page provides verified hardware configuration details, default jumper settings per UG-535 Rev. 0, supported power modes (7–9 V DC input or external ±12/±15 V, AVCC/DVCC), reference source options (AD780 or ADR431), and software-controlled waveform analysis capabilities including FFT and histogram generation.

Technical Context

The EVAL-AD7658SDZ implements a complete signal chain for the AD7658 ADC, integrating six AD8597 ultra-low-noise op-amp buffers, on-board ±15 V op-amp supplies (via ADP1613/ADP2301), dual voltage references (AD780 at 2.5 V and ADR431), and ADG3308 level translators for SDP interface compatibility. All power rails - AVCC, DVCC, VDD, VSS - are generated or selectable via jumpers.

Default factory configuration (Table 3, UG-535) sets parallel mode (SER/PAR SEL = GND), word-mode interface (W/B = GND), ±4 × VREF input range (RANGE = GND), and on-board 2.5 V AD780 reference (LK13 = A, LK21 = removed). The board supports both SDP-controlled and standalone operation with configurable analog input buffering (SL15–SL20 = A) and grounding (LK4–LK5, LK14–LK18 inserted).

Key Specifications

Availability

EVAL-AD7658SDZ is available at Aetrix Electronics and suitable for industrial process control, power quality monitoring, and motor drive feedback systems requiring stable component supply and validated ADC evaluation infrastructure.

Supply support for EVAL-AD7658SDZ 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 Wilmington, MA.

The EVAL-AD7658SDZ belongs to Analog Devices' precision ADC evaluation platform family, engineered to accelerate development of high-fidelity data acquisition systems for industrial automation, energy metering, and test equipment.

FAQ

What is the primary function of the EVAL-AD7658SDZ?

The EVAL-AD7658SDZ is a dedicated evaluation board for the AD7658 12-bit, 6-channel, 250 kSPS simultaneous-sampling ADC. It provides full hardware and software infrastructure - including op-amp buffering, reference selection, power regulation, and USB-based PC control via EVAL-SDP-CB1Z - to validate performance in real-world analog input scenarios without custom PCB design. The EVAL-AD7658SDZ enables immediate functional testing and parameter characterization of the AD7658 under defined operating conditions.

Which ADC does the EVAL-AD7658SDZ support, and what are its key electrical specs?

The EVAL-AD7658SDZ is specifically configured for the AD7658 - a 12-bit, 6-channel, 250 kSPS simultaneous-sampling SAR ADC with bipolar input range, integrated reference buffer, and iCMOS® process technology. Its core specs include ±4 × VREF input range (default), 4.75–5.25 V AVCC/DVCC supply, and operation from single 5 V or dual ±12/±15 V supplies. The EVAL-AD7658SDZ delivers these conditions via on-board regulators and configurable jumpers per UG-535 Table 3.

How is the EVAL-AD7658SDZ powered, and what are the power supply options?

The EVAL-AD7658SDZ accepts 7–9 V DC input via J702 to generate all internal supplies: ±15 V for op-amps (AD8597), +5 V for AVCC/DVCC, and +3.3 V for VDRIVE. Alternatively, external supplies can be applied directly to J100 (±12/±16.5 V), J703 (4.75–5.25 V AVCC), and J701 (4.75–5.25 V DVCC). Default factory settings (LK101/LK102 = A, LK701/LK702 = A) enable full on-board power generation when used with EVAL-SDP-CB1Z.

What reference sources are available on the EVAL-AD7658SDZ?

The EVAL-AD7658SDZ provides two on-board voltage references: the AD780 (2.5 V or 3.0 V selectable via LK21) and the ADR431 (ultralow-noise XFET). By default (LK13 = A, LK21 = removed), the AD780 at 2.5 V supplies REFIN/REFOUT. External references may be connected via REFCAPA/REFCAPC using solder links SL1/SL2, and LK19/LK24 control connection routing. Reference selection directly impacts ADC full-scale range and noise floor in the EVAL-AD7658SDZ signal chain.

Does the EVAL-AD7658SDZ require additional hardware to operate?

Yes - the EVAL-AD7658SDZ requires the EVAL-SDP-CB1Z system demonstration platform for USB-based PC control and software interaction. It also needs a 9 V mains adapter (included), SMB cables for analog inputs, and a Windows PC (XP SP2/Vista/7) with USB 2.0. In standalone mode, external ±12/±15 V, AVCC, and DVCC supplies must be provided. The EVAL-AD7658SDZ cannot operate autonomously without either the EVAL-SDP-CB1Z or externally sourced power and control signals.