Impedance Measurement and Analysis

Impedance measurement instruments are employed for development, characterization, and test of sensors, electronic components, electrochemical cells, and materials. They are capable of extracting complex impedance vectors at a single test condition, or while sweeping source parameters like frequency, amplitude, and dc bias. To meet the bandwidth and accuracy requirements for this class of instruments, Analog Devices offers:

  • The industry’s largest portfolio of DDS-based signal sources
  • The fastest precision D/A and A/D converters in the market
  • High-performance precision and RF amplifiers for signal conditioning
  • ARM Cortex-based single-chip solutions for handheld and portable applications
  • Digital signal processors for real-time signal analysis

Our broad array of products enables impedance measurement designers to optimize for accuracy and speed from dc to over 100MHz.

Impedance Measurement and Analysis

Featured Products (9)

Signal Chains

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Evaluation Kits

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EVAL-ADA4625-1

EVAL-ADA4625-1 Circuit Diagram

EVAL-ADA4625-1 Photo

Evaluation Kits

UG-1201 describes the evaluation board for the ADA4625-1 low noise, fast settling, single supply, rail-to-rail output (RRO), junction field effect transistor (JFET) op amp in an 8-lead small outline integrated circuit (SOIC) package with an exposed pad. The design of this evaluation board emphasizes simplicity and ease of use. This evaluation board is a 2-layer board that accommodates edge mounted SubMiniature version A (SMA) connectors on the inputs and outputs. The SMA connectors allow efficient connection to test equipment or other circuitry.


The evaluation board ground plane, components placement, and power supply bypassing are optimized for maximum circuit flexibility and performance. The exposed pad of the ADA4625-1 is connected to the ground plane on the evaluation board to enhance thermal and noise performance. The evaluation board uses a combination of surface mount technology (SMT) component case sizes 0603 and 0805, with the exception of the bypass capacitors, Capacitor C3 and Capacitor C5, which have a maximum standard size of 1206. The evaluation board also features a variety of unpopulated resistor and capacitor pads, which provide the user with multiple choices and extensive flexibility for different application circuits and configurations, such as active loop filters, transimpedance amplifiers (TIAs), and charge amplifiers.


The ADA4625-1 data sheet covers the specifications and details of the device operation and application circuit configurations and guidance. Consult the data sheet in conjunction with UG-1201 for a better understanding of the device operation, especially when powering up the evaluation board for the first time.