Hemal Electronics

Single Chip, High Quality Audio/Voice Recording & Playback Solution No External ICs Required Minimum External Components User Friendly, Easy to Use Operation Programming & Development Systems Not Required 170/ 340/ 680 sec. Powerful 16-Bits Digital Audio Processor. Nonvolatile Flash Memory Technology No Battery Backup Required External Reset pin. Powerful Power Management Unit Very Low Standby Current, Supports Power-Down Mode for Power Saving Built-in Audio-Recording Microphone Amplifier No External OPAMP or BJT Required Easy to PCB layout Configurable analog interface Differential-ended MIC pre-amp for Low Noise High Quality Line Receiver High Quality Analog to Digital and PWM module Resolution up to 16-bits Simple And Direct User Interface Averagely 1,2,4 or 8 voice messages record & playback

Additional Information:

• Item Code: AP33A3
• Production Capacity: 5 DAYS
• Delivery Time: EX STOCK
• Packaging Details: 15PC STRIP

Other Details:

• Embedded 16M/8M/4M/2M EPROM.
• 682/341/170/85 sec Voice Length at 6KHz sampling and 4-bits ADPCM compression. 
• Combination of voice blocks to extend playback duration. 
• User selectable PCM16 or ULAW8 or PCM8 or ADPCM4 data compression. 

6 Triggering Modes are Available: 

• Key Mode: S1 - S4 to trigger up to 9 voice groups; Power on play function. –
• SBT Mode: SBT to trigger up to 1024 voice groups sequentially; Power on play function. 
• CPU Parallel Mode: S[4:1] services as 4-bits address to trigger up to 16 voice groups. with SBT goes HIGH to strobe the address bits.
• SPI Mode: CSB, SCK, DI - 3 wire address control up to 1024 voice groups
• I2C Mode: SCK, DI - 2 wire address control up to 1024 voice groups
• MP3 Mode: S1:Backward, S2: Forward , S3:Stop, S4:Reset, SBT: (Play/Pause) or (Play/Stop) Trigger up to 1024 voice groups

Voice Group Trigger Options:

• Edge / Level; Hold / Unholdable; Retrigger / Non-retrigger
• RST pin set HIGH to stop the playback at once.
• LVD ( Low voltage detect).
• Programmable outputs pin out1 - for busy-H, busy-L, stop-H, stop-L, prog busy-H, prog busy-L, Load, LED flash (LED high active), -LED flash (LED low active).

Three Kind Oscillator: 

• Internal-Rosc, External-Rosc, Crystal. §
• PWM Vout1 and Vout2 drive speaker directly.
• D/A COUT pin drives speaker through an external BJT or audio AMP.
• Development System support for voice compilation.

Additional Information:

• Item Code: AP23341
• Delivery Time: Ex Stock
• Packaging Details: 60pc Per Tube

Other Details:

• Embedded 4M EPROM.
• Combination of voice blocks to extend playback duration.
• User selectable PCM16 or PCM8 or ADPCM data compression
• triggering modes are available: Key Mode, CPU Parallel Mode, I2C Mode, SPI Mode and MP3 Mode   
• Voice Group Trigger Options: Edge / Level; Hold / Un-hold; Retrigger / Non-retrigger
• RST pin set to HIGH to stop the playback at once
• LVR (Low Voltage Reset)
• PWM Vout 1 and Vout 2 drive speaker directly
• D / A COUT pin drives speaker through an external BJT.
• Development System support voice compilation.

PRODUCT DESCRIPTION The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery-powered, portable (or remote) applications. The AD620, with its high accuracy of 40 ppm maximum nonlinearity, low offset voltage of 50 μV max, and offset drift of 0.6 μV/°C max, is ideal for use in precision data acquisition systems, such as weigh scales and transducer interfaces. Furthermore, the low noise, low input bias current, and low power of the AD620 make it well suited for medical applications, such as ECG and noninvasive blood pressure monitors.  The low input bias current of 1.0 nA max is made possible with the use of Super??eta processing in the input stage. The AD620 works well as a preamplifier due to its low input voltage noise of 9 nV/√Hz at 1 kHz, 0.28 μV p-p in the 0.1 Hz to 10 Hz band, and 0.1 pA/√Hz input current noise. Also, the AD620 is well suited for multiplexed applications with its settling time of 15 μs to 0.01%, and its cost is low enough to enable designs with one in-amp per channel. Table