Low-pass electronic filter MAF1005FR series

passivecompactmultilayer

Overview
TDK Corporation announces the MAF1005FR series: compact multilayer chip noise suppression filters for audio lines (sound lines) in smartphones and other devices (tablets, wearables, portable games). The components measure 1.0 mm (L) x 0.5 mm (W) x 0.5 mm (H) and entered mass production in November 2023.

Performance summary

• Wide frequency bandpass covering from the FM band to the cellular band.
• Typical impedance up to 2600 Ω at 900 MHz and insertion loss of more than 25 dB (typical).
• Designed with newly developed low-distortion ferrite materials to reduce audio distortion while maintaining sound quality.
• Low DC resistance to limit sound distortion with minimal volume reduction.
• Wide operating temperature range: -55 °C to +125 °C.

Main applications

• Audio lines for smartphones, tablets, wearable devices and portable games (earphones, microphones, speakers).

Main features and benefits

• Suppress electromagnetic noise across a wide frequency range (FM to cellular).
• Lower audio distortion compared with conventional chip beads thanks to low-distortion ferrite material.
• Single-component wideband suppression, reducing need for multiple filters per frequency band in many designs.
• Extremely compact footprint for space-constrained designs.

Key data (table)
Type | Impedance [Ω] @100MHz | Impedance [Ω] typ. @900MHz | DC resistance [Ω] max. | Rated current [mA] max.
MAF1005FRQ601AT000 | 600 ±25% | 1800 | 1.00 | 280
MAF1005FRQ801AT000 | 800 ±25% | 2200 | 1.35 | 270
MAF1005FRQ102AT000 | 1000 ±25% | 2600 | 1.65 | 240

Product roadmap
TDK plans to expand the lineup with smaller components for high-frequency bandpass noise control (900 MHz to 5 GHz) and products supporting higher currents for applications such as speakers.

Technical specifications

• Series: MAF1005FR
• Typical dimensions: 1.0 mm (L) x 0.5 mm (W) x 0.5 mm (H)
• Typical impedance: up to 2600 Ω at 900 MHz
• Impedance examples at 100 MHz: 600 Ω, 800 Ω, 1000 Ω (series variants)
• Insertion loss: more than 25 dB (typical)
• DC resistance (max): 1.00 Ω / 1.35 Ω / 1.65 Ω depending on variant
• Rated current (max): 280 mA / 270 mA / 240 mA depending on variant
• Operating temperature: -55 °C to +125 °C
• Material: newly developed low-distortion ferrite material
• Primary applications: earphones, microphones, speakers and other audio lines in mobile and portable devices
• Mass production: started November 2023