ISD1620B Datasheet | Nuvoton Technology

DESCRIPTION The Nuvoton® ISD1600B Chip Corder® Series is a high quality, fully integrated, singlechip single-message voice record and playback device ideally suited to a variety of electronic systems. The message duration is user selectable in ranges from 6.6 seconds to 40 seconds, depending on the specific device. The sampling frequency of each device can also be adjusted from 4 k Hz to 12 k Hz with an external resistor, giving the user greater flexibility in duration versus recording quality for each application. Operating voltage spans a range from 2.4 V to 5.5 V to ensure that the ISD1600B devices are optimized for a wide range of battery or line-powered applications. The devices include an on-chip oscillator (with external resistor control), microphone preamplifier with Automatic Gain Control (AGC), anti-aliasing filter, Multi-Level Storage (MLS) array, smoothing filter, Pulse Width Modulation (PWM) Class D speaker driver, and current output. Voice signals can be fed into the chip through a differential microphone input for recording. The PWM output can directly drive a standard 8 Ω speaker or a typical buzzer, while the separate single-ended current output can drive an external amplifier. Recordings are stored into the on-chip Flash memory cells, providing zero-power message storage. This unique single-chip solution is made possible through Nuvoton’s patented Multi-Level Storage (MLS) technology. Audio data are stored directly in solidstate memory without digital pression, providing superior quality voice and music reproduction. Feb 1, 2023 Page 3 of 25 Rev1.6 ISD1600B 2. FEATURES - User-friendly single-chip, single-message voice record & playback devices - Wide operating voltage: 2.4V to 5.5V - Push-button interface o Record is level-triggered o Playback is either edge- or level-triggered - Selectable sampling frequency controlled by an external oscillator resistor Sampling Frequency Rosc 12 k Hz 53 kΩ 8 k Hz 80 kΩ 6.4 k Hz 100 kΩ 5.3 k Hz 120 kΩ 4...