TS4994EIJT STMicroelectronics

TS4994FC 1.2 W differential input/output audio power amplifier with selectable standby Features TS4994EIJT - Flip-chip (9 bumps) Differential inputs GnGndd Near-zero pop & click 100dB PSRR 217Hz with grounded inputs VV VV 7676 55 O-O- O+O+ Operating range from V = 2.5V to 5.5V CC 1.2W rail-to-rail output power V =5V, CC BypBypaassss StStdbdbyy 44 88 99 THD = 1%, F = 1kHz, with 8 load 90dB CMRR 217Hz VV VV ININ++ 11 22 33 ININ-- Ultra-low consumption in standby mode (10nA) Selectable standby mode (active low or active VV SSttddbbyyMModeode CCCC high) Ultra fast startup time: 15ms typ. The device is equipped with common mode Available in 9-bump flip-chip (300mm bump feedback circuitry allowing outputs to be always diameter) biased at V /2 regardless of the input common CC Lead-free package mode voltage. The TS4994 is designed for high quality audio Description applications such as mobile phones and requires few external components. The TS4994 is an audio power amplifier capable of delivering 1W of continuous RMS output power into an 8 load 5V. Due to its differential inputs, Applications it exhibits outstanding noise immunity. Mobile phones (cellular / cordless) An external standby mode control reduces the Laptop / notebook computers supply current to less than 10nA. An STBY MODE pin allows the standby to be active HIGH PDAs or LOW. An internal thermal shutdown protection Portable audio devices is also provided, making the device capable of sustaining short-circuits. Order codes Part number Temperature range Package Packaging Marking FC9 with back TS4994EIKJT A94 coating -40C, +85C Tape & reel TS4994EIJT Lead free flip-chip9 A94 December 2006 Rev 2 1/35 www.st.com 35Contents TS4994FC Contents 1 Application component information 3 2 Absolute maximum ratings and operating conditions . 4 3 Electrical characteristics . 5 4 Application information . 23 4.1 Differential configuration principle 23 4.2 Gain in typical application schematic 23 4.3 Common mode feedback loop limitations . 23 4.4 Low and high frequency response 24 4.5 Calculating the influence of mismatching on PSRR performance 25 4.6 CMRR performance . 27 4.7 Power dissipation and efficiency . 28 4.8 Decoupling of the circuit 30 4.9 Wake-up time: t WU 30 4.10 Shutdown time . 31 4.11 Pop performance . 31 4.12 Single-ended input configuration . 31 5 Package information 32 6 Revision history . 34 2/35