SGMICRO FT690M

The ft690 is a mono Class-AB audio power amplifier designed for demanding applications in mobile phones and other portable media devices. It is capable of delivering 1.25W of continuous output power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The ft690 is specifically designed to provide high quality output power with a minimal number of external components. The ft690 does not require output coupling capacitors or bootstrap capacitors, and is therefore ideal for use in mobile phones and other low voltage applications where minimal power consumption is a primary requirement. The ft690 features a low-power shutdown mode. In the shutdown mode where a logic low is applied onto the SD pin, the amplifier is completely turned off and no supply current will flow through the device. The ft690 also features advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The ft690 is unity-gain stable and can be configured by external gain-setting resistors.

• Ultra low current in shutdown mode
• Low quiescent current
• Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
• Supports both single-end and differential inputs
• Wide operating voltage range: 2.5~5.5V
• No output coupling capacitors, snubber networks or bootstrap capacitors required
• Available in space-saving package COL1.5X1.5-9L MSOP-8L

• Mobile phone
• PDA
• Portable electronic devices