LMV1024 Datasheet | National Semiconductor

Description National’s LMV1024 and LMV1026 stereo amplifiers are solutions for the new generation of voice enrichment capabilities. National has integrated sigma delta modulation and analog cores to improve the voice quality and the performance and to support designer’s choices. Each 20 k Hz preamplifier drives a Pulse Density Modulated (PDM) signal at an over sampled 60 bit stream, offering .. versatility. These solutions provide immediate conversion to high performance audio spectrum, thus pleting a high quality audio system. The LMV1024 and LMV1026 operate from 1.6V to 3V. National’s new adjustable clock frequency technology is designed for stereo, performance and ease of use. The stereo function is either a rising or falling edge clock mand. The high drive, robust PDM signal directly from an ECM (Electret Condenser Microphone), upgrades existing lower quality, low-level signal constraints. These advanced mixed signal preamplifiers cleanly, accurately and creatively eliminate older, poorer quality systems, which restricted performance and versatility. The 4-wire PDM signaling reduces RF noise and simplifies layout. Using National’s PDM solutions is the choice for higher quality mono or stereo and multi-array applications. National’s 518u A circuits deliver stereo portability with audio quality bandwidth. These solutions enable rapid system evaluation and enhance consumer satisfaction. National provides the LMV1024 and LMV1026 in 6-bump micro SMD packages with 1 kg adhesion properties. Features (Typical VDD = 1.8V, CLOCK = 1.2 MHz, f INPUT = 1 k Hz, VINPUT = 18 m VPP, unless otherwise specified) n Enhanced high-performance, full PDM output from the element n Stereo chipset and array routing n SNR A-weighted 59 d B n Digital A-weighted noise floor - 89 d BFS n Supply current 518 µA n Clock frequency 400 k Hz to 2.4 MHz n Total harmonic distortion 0.03% n Power supply rejection ratio 100 d B n Adhesion technology > 1 kg n Highly integrated stereo or mono signaling n...