Mindspeed adds TIAs for PON equipment

SEPTEMBER 2, 2010 -- Mindspeed Technologies Inc. (NASDAQ:MSPD) has announced the company’s latest generation of high-sensitivity 1.25-Gbps and 2.5-Gbps transimpendance amplifiers (TIAs). The M02025 and M02028 TIAs are designed to improve optical sensitivity and dynamic range while adding new features that reduce the cost of optical network terminals (ONTs). The devices help support deployment of fiber-to-the-x (FTTx) multi-play services over GEPON and GPON fiber access infrastructures.

The M02025 and M02028 devices can be used with the company’s M02098 laser drivers and post amplifier with dual closed-loop Eye-Minder technology. The combination creates a complete PON module chipset that delivers superior design margin, while lowering the overall module manufacturing cost, Mindspeed asserts.

LuxNet Corp, has collaborated with Mindspeed to provide a bi-directional optical subassembly (BOSA) using the M02025 on a GPON Small-Form-Factor (SFF) reference design to be showcased at CIOE.

"LuxNet has a long history working with Mindspeed for designs spanning several generations of TIA devices," said Leslie Huang, vice president of worldwide sales at LuxNet. "We are particularly pleased with the M02025 device’s ability to provide additional performance margin and cut overall system costs for GPON and OC-48 modules."

Mindspeed says the 1.25-Gbps M02028 TIA and 2.5-Gbps M02025 TIA feature wide input dynamic range and support different transmission distance requirements, including short-haul fiber-optic systems that require typical input overload of 4 mA (peak to peak). The devices also can be used for high-split-ratio PONs that require TIAs capable of detecting very small signals in a noisy environment. Typical sensitivity for the M02025 TIA in receiver optical subassembly (ROSA) applications is better than -28 dBm at 3 Gbps and better than -30 dBm at 2.5 Gbps when used with a PIN diode, and performance with an avalanche photodiode (APD) exceeds -35 dBm at 2.5 Gbps, according to the company. Typical sensitivity for the M02028 TIA is better than -31 dBm at 1.25 Gbps when used with a PIN diode, Mindspeed adds.

The Mindspeed TIAs each support multiple data rates, from 1.25 Gbps to 3 Gbps and from 100 Mbps to 1.25 Gbps for the M02025 and M02028, respectively. Each TIA also reduces overall ROSA assembly costs by eliminating the need for photodiode filtering caps and internal ROSA power supply decoupling caps. Mindspeed says. Both devices are designed with integrated average photodiode current outputs that support accurate PIN and APD-based photodiode monitoring. The M02025 and M02028 also feature an on-die temperature sensor that can be used for APD temperature monitoring implementations.

The M02025 and M02028 TIAs are currently in volume production. Pricing information is available upon request.

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