HIOKI IM7581 - Impedance Analyzer for HF Components, 100 kHz to 300 MHz
Impedance analyzer for measurements from 100 kHz to 300 MHz with basic accuracy
±0.72% Z and ±0.41° phase, repeatability ±0.07%, typical measurement time 0.5 ms,
comparator and BIN functions, USB, LAN and EXT I/O, optional RS-232C or GP-IB
Product number:
IM7581-01
EAN:
4536036004645
Length:
215 mm
Width:
268 mm
Height:
200 mm
Weight:
6.5 kg
Product information HIOKI IM7581 - Impedance Analyzer for HF Components, 100 kHz to 300 MHz
Key Specifications
- Measurement frequency: 100 kHz to 300 MHz
- Typical analog measurement time: 0.5 ms
- Basic accuracy: ±0.72% (Z, reading), ±0.41°(Phase)
- Typical repeatability: ±0.07% (e.g., 1 nH at 3 GHz)
- Test signal levels: −40.0 dBm to +7.0 dBm
Typical Applications
- Characterization of power inductors, common-mode filters and ferrite components
- Frequency-dependent impedance analysis of components used in power electronics and noise suppression design
- Resonance and peak evaluation of inductive and filtering structures
- PASS/FAIL screening and comparator-based testing of HF components in R&D and production-related environments
Models in comparison
| Model | Measurement frequency | Test signal levels |
|---|---|---|
| IM7587 | 1 MHz bis 3 GHz | −40,0 dBm bis +1,0 dBm |
| IM7585 | 1 MHz bis 1,3 GHz | −40,0 dBm bis +1,0 dBm |
| IM7583 | 1 MHz bis 600 MHz | −40,0 dBm bis +1,0 dBm |
| IM7581 | 100 kHz bis 300 MHz | −40,0 dBm bis +7,0 dBm |
Detailed Product Overview
Impedance measurements up to 300 MHz support analysis of HF components used in power electronics and noise suppression applications. With a frequency range from 100 kHz to 300 MHz, the IM7581 supports characterization of components such as power inductors, common-mode filters, ferrite components and filter structures.Measurement Performance and Analysis Functions
With a basic accuracy of ±0.72% of impedance and ±0.41° of phase, the IM7581 is designed for precise impedance measurements up to 300 MHz. Test signal levels from −40.0 dBm to +7.0 dBm support measurement conditions that require higher excitation of the device under test. Typical repeatability of approximately ±0.07% supports reproducible measurement results under defined conditions across its entire frequency range. A typical measurement time of 0.5 ms enables fast frequency sweeps without compromising measurement stability.The analyzer supports LCR, sweep and continuous measurement modes and provides
evaluation functions such as comparator and BIN judgment, as well as area, peak and spot
analysis. All measurement settings and analysis functions are accessed directly via the
integrated 8.4 inch color touchscreen. Standard interfaces include USB, LAN and EXT I/O,
with optional RS-232C and GP-IB.
For further analysis, the IM7581 provides an equivalent circuit analysis function with
representative circuit models and automatic model selection based on measurement data.
This supports impedance and resonance evaluation of components within its specified
frequency range.
Test Head and Fixtures
The IM7581 employs a compact, palm-sized test head connected to the main unit by a specified connection cable. It is available with 1 m or 2 m cable lengths, allowing users to balance measurement accuracy and installation flexibility. Placing the test head close to the device under test minimizes signal path length and reduces parasitic inductance and capacitance that would otherwise affect high-frequency measurements. This design supports stable and reproducible results up to 300 MHz while reducing bench space requirements in high-frequency measurement environments.For measurements of components with different package types, the IM7581 is typically used
in combination with the IM9202 test fixture. The IM9202 is designed for impedance
measurements up to 600 MHz and supports both surface-mount and leaded components
with a stable two-terminal contact interface. Defined contact geometry ensures reproducible
placement of the device under test and reliable electrical contact, reducing measurement
variation and enabling accurate characterization of inductive and filtering components within
the specified frequency range.
For stable mounting, the IM9202 test fixture is mounted on the IM9200 stand. The stand
provides a secure base and a defined mechanical connection between the test head and the
fixture and includes a magnifier to facilitate handling of small components. The IM9906
adapter is required to connect the 7 mm interface of the test fixture to the analyzer test
head’s 3.5 mm connector.
Calibration and Measurement Integrity
With the optional IM9905 calibration kit, OPEN, SHORT and LOAD reference standards are available to correct system-related errors in high-frequency impedance measurements up to 3 GHz. The calibration addresses parasitic influences within the measurement path up to the specified reference plane, including the analyzer test head and its interfaces. The calibration standards are connected via the IM9906 adapter, which is shared with test fixture connections.Integrated contact check functions, including DCR testing, Hi-Z reject and waveform
verification, are used to assess contact quality before and, if necessary, after measurement.
This reduces the risk of invalid results caused by poor electrical contact or unstable
component positioning. Developed and manufactured in Japan, the IM7581 is intended for reliable long-term operation in measurement and test environments with high requirements
for stability over time.
- IM7581 Impedance Analyzer
- Test head
- Connection cable
- Power cord - Instruction manual
- Impedance analyzer application software (communications manual)
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Product catalog with datasheet, IMPEDANCE ANALYZER IM7580 Series (English)5,607 KB pdf
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Product brochure with datasheet, SMD TEST FIXTURE IM9201, IM9202 (English)2,428 KB pdf
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Instruction Manual, Impedance Analyzer IM7580A, IM7581, IM7583, IM7585, IM7587 (English)20,883 KB pdf
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Instruction Manual, Impedance Analyzer IM7580A, IM7581, IM7583, IM7585 (German)11,377 KB pdf
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Bedienungsanleitung, Impedance Analyzer IM7580A, IM7581, IM7583, IM7585 (French)11,347 KB pdf
Related products
IM9202
IM9202 - Test Fixture for Impedance Measurements, DC to 600 MHz
The IM9202 test fixture is designed for two-terminal impedance measurements of axial and
radial leaded components as well as surface-mount components (SMD). It supports
measurements up to 600 MHz and is used in combination with HIOKI impedance analyzers,
including IM7587, IM7585, IM7583 and IM7581. Axial leaded components with lead spacing from 1 mm to 25 mm and radial leaded
components with lead spacing from 2 mm to 26 mm can be measured, as defined by the
fixture geometry. Supported SMD component sizes are EIA0603 (Electronic Industries
Alliance) and larger. For stable operation, the IM9202 is mounted on the IM9200 stand, which provides a secure
base and defined mechanical alignment between the test head and the fixture and supports
handling of small components. Electrical connection to the analyzer test head is performed
via the 7 mm interface of the test fixture. The IM9906 adapter is required to connect the 7
mm interface of the test fixture to the analyzer test head’s 3.5 mm connector. The IM9202 is supplied with a carrying case designed for storage and transport of the test
fixture and its included accessories. The carrying case also provides dedicated space for
optional accessories such as the IM9906 adapter and IM9905 calibration standards, allowing
related components to be stored together when required.
IM9201
IM9201 - SMD Test Fixture for Impedance Measurements, DC to 3 GHz
The IM9201 SMD test fixture is designed for impedance measurements of surface-mount
components (SMD) in combination with HIOKI impedance analyzers that support twoterminal measurement configurations. It supports measurements up to 3 GHz and
accommodates SMD component sizes from EIA0201 to EIA1210.The IM9201 supports measurements up to 3 GHz, which aligns with the frequency range of
high-frequency impedance analyzers such as the IM7587 and IM7585. The test fixture can
also be used with impedance analyzers featuring lower maximum measurement frequencies,
such as the IM7583 or IM7581, when measurements of small SMD component sizes below
EIA0603 are required.For stable operation, the IM9201 is mounted on the IM9200 stand, which provides a secure
base and defined mechanical alignment between the analyzer test head and the test fixture.
Handling of small SMD components is further facilitated by the magnifier supplied with the
IM9200 stand. Electrical connection to the analyzer test head is performed via the 7 mm
interface of the test fixture. The IM9906 adapter is required to connect the 7 mm interface of
the test fixture to the analyzer test head’s 3.5 mm connector. The IM9201 is supplied with a carrying case designed for storage and transport of the test
fixture and its included accessories. The carrying case also provides dedicated space for
optional accessories such as the IM9906 adapter and IM9905 calibration standards, allowing
related components to be stored together when required.
IM9200
IM9200 - Stand for IM9201 and IM9202 impedance test fixtures
The IM9200 is a stand for the impedance test fixtures IM9201 and IM9202. It provides a
stable mechanical base and a defined alignment between the analyzer test head and the
mounted test fixture. Handling of small components during setup and measurement is supported by the removable
magnifier supplied with the IM9200. When not in use, the magnifier can be stored in the
carrying case of the test fixture.
IM9905
IM9905 - APC-7 Calibration Standards for Impedance Analyzers
The IM9905 calibration kit provides OPEN, SHORT and LOAD standards for calibration of
HIOKI impedance analyzers with two-terminal measurement capability at the 7 mm (APC-7)
reference plane. These standards are used to correct systematic measurement errors in the
measurement path up to this reference plane. For calibration of impedance measurement systems, the 7 mm (APC-7) reference plane is
commonly applied in high-frequency metrology. When calibration is performed on systems
with a 3.5 mm test head, such as those of the HIOKI IM7587, IM7585, IM7583 or IM7581, a
suitable adapter is required to establish the 7 mm reference plane. The adapter provided by
HIOKI for this purpose is the IM9906.
IM9906
IM9906 - 7 mm (APC-7) to 3.5 mm Adapter
The IM9906 adapter features a 7 mm (APC-7) connection on one side and a 3.5 mm male
connector on the other side. It is used to connect 7 mm calibration standards or test fixtures
to measurement systems with a 3.5 mm test head, including HIOKI impedance analyzers
such as the IM7587, IM7585, IM7583 and IM7581. The 7 mm (APC-7) interface is commonly used in high-frequency metrology for calibration
standards and impedance test fixtures. The 3.5 mm interface is a precision coaxial connector
used for RF and impedance measurements and is mechanically compatible with SMA
connectors, but differs in construction by using an air dielectric instead of a solid dielectric.
IM7587-01
HIOKI IM7587 - High-Frequency Impedance Analyzer, 1 MHz to 3 GHz
High-frequency impedance analyzer for RF component testing from 1 MHz to 3 GHz in development and production. HIOKI IM7587 available from HIOKI Europe.
IM7583-01
HIOKI IM7583 - High-Frequency Impedance Analyzer, 1 MHz to 600 MHz
High-frequency impedance analyzer for RF component testing from 1 MHz to 600 MHz in development and production. HIOKI IM7583 available from HIOKI Europe.
IM3570
HIOKI IM3570 - Impedance Analyzer, 4 Hz to 5 MHz
HIOKI IM3570 impedance analyzer for high-precision impedance, inductance and capacitance measurements from 4 Hz to 5 MHz – ideal for lab, R&D and production use. Order now from HIOKI Europe.
Z3000
Z3000 - GPIB Interface
Optional GPIB interface card for installation in the IM3523, IM3533, IM3533-01, IM3590, IM7580A, IM7581, IM7583, IM7585, IM7587 impedance meters.
Z3001
Z3001 - RS-232C Interface for IM3590
Optional HIOKI RS-232C interface card for installation in the HIOKI impedance measuring instruments IM3523, IM3533, IM3533-01, IM3590, IM7580A, IM7581, IM7583, IM7585, and IM7587.
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9151-02
9151-02 - GP-IB CONNECTOR CABLE
The GPIB connector cable is a 2-meter long cable designed for use with all Hioki products that are equipped with a GPIB interface. This cable ensures reliable connectivity and data transfer for your test and measurement equipment. Technical Details: Cable type: GPIB connector cable Length: 2 meters Compatible devices: All Hioki products with GPIB interface
9637
9637 - RS232 Crossover-Kabel
The 9637 is a RS-232c cross type cable for two-way communication between PC or other controlling device and a Hioki Product equipped with RS232c interface as feature or option. Technical Details: Connectors: 9pin female (both ends) Cable Type: Cross Length: 1.8m