مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

ISD1900 ChipCorder® Series is a single-chip multiple-message record/playback device with dual operating modes and wide operating voltage ranging from 2.4V to 5.5V. The sampling frequency can be selected from 4 to 12 kHz via an external resistor, which also determines the duration. The device is designed for mostly standalone applications, and it can be manipulated by a microcontroller if necessary. The two operating modes are Address Mode and Direct Mode. In Address Mode, record and playback operations are manipulated according to the start and end addresses specified through the pins. In Direct Mode, the device can configure the memory up to eight similar duration messages, and each message can be randomly accessed via its message control pin. The device has a selectable differential microphone input with AGC feature or single-ended analog input, AnaIn, under feed-through mode. The audio output is either a differential Class-D PWM direct-drive or a single-ended voltage output (AUX out), depending on the derivative selected.

Features

• The ISD1900 is a multiple messages record/playback device with two operational modes: Address Mode and Direct Mode.
• Supply voltage: 2.4V to 5.5V.
• External resistor, Rosc, selects sampling frequency and duration.
• Mic + /Mic-: differential microphone inputs.
• AGC: automatic gain control for microphone preamp circuit.
• FT: feed-through the AnaIn signal to the speaker outputs while AnaIn is converted from MIC+. When both FT and recording are active, device will record AnaIn signal into memory with AnaIn signal output to speaker simultaneously.
• SP+ / SP-: Class-D PWM differential speaker drivers or single-ended voltage output, depending on the derivative selected.
• LED: LED is on during recording.
• Automatically power down after each operation cycle.
• Playback takes precedence over the recording operation.
• Temperature option: -40°C to +85°C (Industrial)
• Packaging: available in SOIC only
• While in Address Mode, flexible message duration is defined by start address and end address.
• Utilize four start address pins (S0, S1, S2 & S3) and four end address pins (E0, E1, E2 & E3) to specify the message duration.
• REC: Level-hold or Edge-trigger (toggle on-off) recording from start to end addresses.
• PlayE: Edge-trigger playback from start to end address and stops at EOM marker, if EOM is prior to end address. Toggle on-off.
• PlayL: Level-hold playback from start to end address. Also, if constantly Low, device will loop playback from start to end address.
• While Direct Mode is active, utilizing the configuration pins, FMC1, FMC2 & FMC3, to define up to eight similar duration messages for random access.
• The control pins are: M1 ~ M8 (message activation) and R/P (record or playback selection).
• The record or playback operation is pre-defined by the R/P pin.
• Each message can be randomly accessed via its message control pin (M1 ~ M8) and the desired operation is facilitated accordingly.