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Product Detailed Parameters
- Description：IC AMP CLASS AB MONO 1.8W 10MSOP
- Series：-
- Mfr：ams-OSRAM USA INC.
- Package：Tube
- Type：Class AB
- Output Type：1-Channel (Mono)
- Max Output Power x Channels @ Load：1.8W x 1 @ 4Ohm
- Voltage - Supply：2.7V ~ 5.5V
- Features：Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown
- Mounting Type：Surface Mount
- Supplier Device Package：10-MSOP
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The AS1702 is a single-channel differential audio power amplifier designed to drive 4 and 8Ω loads. It operates from a single 2.7V to 5.5V supply, delivering up to 1.8W continuous average power into a 4Ω load with less than 1% total harmonic distortion plus noise. The device features adjustable gain via external components, integrated shutdown circuitry reducing quiescent current to under 100nA, and click-and-pop suppression. Available in 10-pin MSOP and DFN packages, it supports an operating temperature range of -40°C to +85°C.
Feature Summary
- Differential input design for improved noise rejection
- Adjustable gain configuration using external resistors
- Integrated low-power shutdown mode
- Click-and-pop suppression circuitry
Applications
- MP3 players
- CD players
- Mobile phones
- PDAs
- Portable DVD players
Procurement Notes
Verify the specific package type (MSOP or DFN) required for your PCB layout. Confirm that the adjustable gain feature aligns with your circuit design needs compared to fixed-gain variants. Ensure the supply voltage remains within the specified 2.7V to 5.5V range for proper operation.
Selection Notes
Select this component when flexible gain settings are necessary through external feedback resistors. It is suitable for battery-powered devices requiring high output power relative to its small footprint. Consider thermal dissipation requirements if operating at maximum power levels.
Part Context
Part of the AS1702-AS1705 family of 1.8W single-channel audio power amplifiers. Pin-compatible with LM4895 and MAX9718A/B/C/D series. Designed for portable audio applications where space and power efficiency are critical constraints.
Replacement Considerations
Pin-compatible replacements include National Semiconductor LM4895 and Maxim MAX9718A/B/C/D series. Verify electrical characteristics match before substitution.
FAQ
How is the gain adjusted on the AS1702?
The gain is set externally using feedback resistors RF and RIN connected to the non-inverting and inverting inputs.
What is the purpose of the SHDM pin?
The SHDM pin controls the polarity of the shutdown input (SHDN), allowing it to be configured as active-high or active-low.
