GA3219 ONSEMI | Alldatasheet
Document overview
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Technical content
Features
- Adaptive Algorithms: ♦ 128−band Adaptive Noise Reduction ♦ Adaptive Feedback Cancellation
- 128−bit Fingerprint Security System and Other Security Features to Protect Against Device Cloning and Software Piracy
- Soft Acoustic Fade Between Memory Changes
- FrontWave Directional Processing
- High Fidelity Audio CODEC
- 20−bit Audio Precision
- 95 dB Input Dynamic Range with HRX/C0116 Headroom Extension
- 1, 2 or 4 Channel WDRC Compression
- 8−Band Graphic EQ
- Eight Biquadratic Filters
- Drives Zero−Bias 2−Terminal Receivers
- Four Analog Inputs
- Two Memory Select Pads www.onsemi.com
16 PAD
OUT−OUT+ MGND PAD CONNECTION FMIC RMIC VC SDA GND PGND 16 1 MARKING DIAGRAM GA3219D−E1 XXXXXX GA3219D = Specific Device Code E1 = RoHS Compliant Hybrid XXXXXX = Work Order Number (Bottom View) See detailed ordering and shipping information on page 12 of this data sheet.
ORDERING INFORMATION
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- Four Fully Configurable Memories with Audible Memory Change Indicator
- Internal or External V olume Control with Programmable Range
- AGC−O with Variable Threshold, Time Constants, and Optional Adaptive Release
- 16 kHz or 8 kHz Bandwidth
- Optimized Programming Speed
- thinSTAX® Packaging
- E1 RoHS Compliant Hybrid thinSTAX Packaging
- Hybrid Typical Dimensions: 0.215 x 0.124 x 0.065 in. (5.46 x 3.15 x 1.65 mm)
Figure 1. Hybrid Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS should not be assumed, damage may occur and reliability may be affected. WARNING: Electrostatic Sensitive Device − Do not open packages or handle except at a static−free workstation. except under controlled conditions. Table 2. ELECTRICAL CHARACTERISTICS (VBAT = 1.25 V; Temperature = 25°C)
100 Hz − 8 kHz
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
- Total system gain consists of: wideband system gain + channel gain + converter gain. T otal system gain is calibrated during Cal/Config process.
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
- Total system gain consists of: wideband system gain + channel gain + converter gain. T otal system gain is calibrated during Cal/Config process.
Figure 4. Typical Hearing Instrument Assembly Diagram Reduction and Adaptive Feedback Cancellation. cloning and software piracy. 32 kHz or 16 kHz, 20−bit digital audio signal. the rear microphone’s gain to that of the front microphone. during the calibration process. process to compensate for microphone/telecoil mismatches. through channel and adaptive processing.
- Frequency band analysis
- 1, 2 or 4 channel WDRC
- Eight logarithmically spaced band frequency shaping (graphic EQ)
- 128 frequency band adaptive noise reduction
- Frequency band synthesis
- Phase cancellation adaptive feedback reduction
Clipper. The last stage in the signal path is the D/A H−bridge. completely automatic operation. Squelch is limited to 1:2 expansion. Figure 5. Adaptive Feedback Canceller (AFC) attenuation gain independently in each of the 128 bands.
- Signal−to−Noise Ratio (SNR)
- Masking threshold
- Dynamics of the SNR per band The SNR in each band determines the maximum amount of attenuation to be applied to the band − the poorer the SNR, the greater the amount of attenuation. Simultaneously, in each band, the masking threshold variations resulting from the energy in other adjacent bands is taken into account. Finally, the noise reduction gain is also adjusted to take advantage of the natural masking of ‘noisy’ bands by speech bands over time. Based on this approach, only enough attenuation is applied to bring the energy in each ‘noisy’ band to just below the masking threshold. This prevents excessive amounts of attenuation from being applied and thereby reduces unwanted artifacts and audio distortion. The Noise Reduction algorithm efficiently removes a wide variety of types of noise, while retaining natural speech quality and level. A/D and D/A Converters The system’s two A/D converters are second order sigma−delta modulators operating at a 2.048 MHz sample rate. The system’s two audio inputs are pre −conditioned with antialias filtering and programmable gain pre−amplifiers. These analog outputs are over−sampled and modulated to produce two, 1−bit Pulse Density Modulated (PDM) data streams. The digital PDM data is then decimated down to Pulse−Code Modulated (PCM) digital words at the system sampling rate of 32 kHz. The D/A is comprised of a digital, third order sigma−delta modulator and an H −bridge. The modulator accepts PCM audio data from the DSP path and converts it into a 32−times over−sampled, 1 −bit PDM data stream, which is then supplied to the H −bridge. The H −bridge is a specialized CMOS output driver used to convert the 1−bit data stream into a low−impedance, differential output voltage waveform suitable for driving zero−biased hearing aid receivers. HRX Head Room Expander The Venture GA3219 has an enhanced Head Room Expander (HRX) circuit that increases the input dynamic range of Venture GA3219 without any audible artifacts. This is accomplished by dynamically adjusting the pre−amplifier’s gain and the post −A/D attenuation depending on the input level.
www.onsemi.com signal processing, but can be used to store additional information related to the associated biquad. The underlying code in the product components automatically checks all of the filters in the system for stability (i.e., the poles have to be within the unit circle) before updating the graphs on the screen or programming the coefficients into the hybrid. If the Interactive Data Sheet receives an exception from the underlying stability checking code, it automatically disables the biquad being modified and display a warning message. When the filter is made stable again, it can be re−enabled. Also note that in some configurations, some of these filters may be used by the product component for microphone/telecoil compensation, low−frequency EQ, etc. If this is the case, the coefficients entered by the user into IDS are ignored and the filter designed by the software is programmed instead. For more information on filter design refer to the Biquad Filters In PARAGON ® Digital Hybrid information note. Volume Control The V olume Control (VC) can be either external or programmable. If VC is programmed for external operation, a variable resistor should be connected to the 9 bit A/D converter. The external VC can be configured to work with either a two−terminal 200 k/C0087 variable resistor or a three −terminal 0.1 M /C0087 – 1 M /C0087 variable resistor. In two −terminal configuration, the VC is connected between GND, Vreg and the VC input. If using a two−terminal VC, it must be calibrated before use. Calibration is not necessary with a three −terminal connection. Hysteresis is built into the VC circuitry to prevent unintentional volume level toggling. A log taper potentiometer is recommended so that gain in dB would be linear with potentiometer rotation. The range of VC is adjustable and can be set between 1 dB (min) and 42 dB (max). AGC−O and Peak Clipper The output compression−limiting block (AGC−O) is an output limiting circuit whose compression ratio is fixed at ∝:1. The threshold level is programmable. The AGC −O module has programmable attack and release time constants. The AGC−O on Venture GA3219 has optional adaptive release functionality. When this function is enabled, the release time varies depending on the environment. In general terms, the release time becomes faster in environments where the average level is well below the threshold and only brief intermittent transients exceed the threshold. Conversely, in environments where the average level is close to the AGC−O threshold, the release time applied to portions of the signal exceeding the threshold is longer. The result is an effective low distortion output limiter that clamps down very quickly on momentary transients but reacts more smoothly in loud environments to minimize compression pumping artifacts. The programmed release time is the longest release time applied, while the fastest release time is 16 times faster. For example, if a release time of 128 ms is selected, the fastest release time applied by the AGC −O block is 8 ms. Venture GA3219 also includes the Peak Clipper block for added flexibility. Memory Select Switches One or two, two−pole Memory Select (MS) switches can be used with Venture GA3219. This enables users tremendous flexibility in switching between configurations. These switches may be either momentary or static and are configurable to be either pull−up or pull−down through the settings tab in IDS. Up to four memories can be configured on Venture GA3219. Memory A must always be valid. All memory select options are selectable via the settings tab in IDS. Momentary Switch on MS This mode uses a single momentary switch on MS (Pin4) to change memories. Using this mode causes the part to start in memory A, and whenever the button is pressed, the next valid memory is loaded. When the user is in the last valid memory, a button press causes memory A to be loaded. This mode is set by programming the ‘MSSMode’ parameter to ‘Momentary’ and ‘Donly’ to ‘disabled’. Example: If 4 valid memories: ABCDABCDA… If 3 valid memories: ABCABCA… If 2 valid memories: ABABA… If 1 valid memories: AAA… Momentary Switch on MS, Static Switch on MS2 (Jump to Last Memory) This mode uses a static switch on MS2 (Pin5) and a momentary switch on MS (Pin4) to change memories. If the static switch is OPEN, the part starts in memory A and behaves like momentary, with the exception that memory D is not used. If the static switch on MS2 is set to HIGH, the part automatically jumps to memory D (occurs on start−up or during normal operation). In this setup, the momentary switch’s state is ignored, preventing memory select beeps from occurring. When MS2 is set to OPEN, the part loads in the last select memory. This mode is set by programming the ‘MSSMode’ parameter to ‘Momentary’ and ‘Donly’ to ‘enabled’. Example: If MS2 = OPEN and there are 4 valid memories: ABCABCA… If MS2 = OPEN and there are 3 valid memories: ABABA… If MS2 = HIGH: D…
Table 3. DYNAMIC EXAMPLE WITH FOUR VALID MEMORIES (T = momentary switch is toggled; 0 = OPEN; 1 = HIGH) This mode uses two static switches to change memories. invalid, the part defaults to memory A. parameter to ‘static’ and ‘Donly’ to ‘disabled’. Table 4. MEMORY SELECTED IN STATIC SWITCH ON This mode uses two static switches to change memories. last valid memory when the static switch on MS2 is HIGH. memories (even if four valid memories are programmed). parameter to ‘static’ and ‘Donly’ to ‘enabled’. Table 5. MEMORY SELECTED IN STATIC SWITCH ON memory before reaching the final memory. if switching MS when MS2 is HIGH. disable the Memory Change Indicator. settings and can be individually selected for each memory. memory change beeping code is deciphered in Table 6. Table 6. MEMORY CHANGE BEEPING CODE output of the tone generator to the input of the D/A converter.
www.onsemi.com (if enabled), and after switching to the next memory, the audio signal is faded back in. The memory switch fader is also used when turning the Tone Generator on or off, and during SDA programming. Power−On/Power−Off Behaviour and Low Battery Indicator During power−on, the Venture GA3219 hybrid is held in a reset state until the supply voltage (Vb) reaches a turn−ON threshold. A small portion of the hybrid’s internal control logic turns on and monitors the voltage to determine if the supply is stable. Once the supply is stable, the entire hybrid is activated and loads its configuration. Finally, the audio output turns on by smoothly transitioning to the expected output level. During normal operation, when a low battery condition is detected, the Venture GA3219 hybrid sends out a series of one to seven beeps (each beep is 512 ms ON and 512 ms OFF) to indicate the battery is low. This is repeated every five minutes until the device reaches the turn −OFF threshold. The low battery threshold is programmable in IDS between 1.0 V and 1.2 V in 10 mV increments. If V b drops below the turn −OFF threshold, then the Venture GA3219 hybrid is returned to its reset state and the audio output is muted. After a reset due to a low battery or a sudden supply transient, the recovery behaviour of the Venture GA3219 is determined by the selectable reset mode through ARKonline. There are four selectable reset modes as follows:
- Shallow−reset mode − After a low battery shutdown or transient shutdown, it allows the Venture GA3219 hybrid to immediately restart when the supply voltage rises above the turn−ON threshold. The device restarts in the memory that was last active when the shut down occurred. In summary, the device functions until the supply voltage drops below the turn−OFF threshold, and recovers when the device rises above the turn−ON threshold again.
- Deep−reset mode − After a low battery shutdown or transient shutdown, it does not allow the Venture GA3219 hybrid to restart. When a shutdown occurs (i.e., the supply voltage drops below the turn−OFF threshold), the device remains off until the supply voltage drops below approximately 0.3 V and subsequently rises above the turn−ON threshold. For the supply to drop below 0.3 V , the battery should be disconnected. Upon reconnecting the battery (preferably a new battery) the supply voltage rises above the turn−ON threshold, and depending if the supply is stable, the device restarts.
- Mixed mode − A combination of the first two modes. The device starts up in shallow−reset mode initially, then transitions to deep reset mode after five minutes.
- Advanced reset mode (recommended) − A more advanced combination of the first two modes, plus some additional intelligence. The device starts up in shallow−reset mode initially, so that after a low battery shutdown or a transient shutdown, the device immediately restarts when the supply voltage rises above the turn−ON threshold. When the device restarts, deep−reset mode is applied and the device operates in the memory that was last active when the shut down occurred. Additionally, the maximum output level is reduced through a 2 dB reduction of the AGC−O and peak clipper. This operating condition is defined as transient reboot mode. The device operates in transient reboot mode (i.e., deep−reset mode and maximum output reduction are applied) while monitoring the supply voltage. If the supply voltage remains above the turn−ON threshold for at least 30 secs, the device is allowed to exit transient reboot mode. The device returns to shallow−reset mode and the maximum output is restored. Generally, any low battery shutdown or transient shutdown that occurs while in shallow−reset mode (or while in the shallow −reset mode component of mixed mode or advanced reset mode) results in the V enture GA3219 hybrid restarting into the memory that was last active when the shut down occurred. The Venture GA3219 hybrid has this memory restart capability for up to three memories. A restart in any memory beyond the first three memories causes the device to restart in the initial memory, similar to the behaviour when a battery is first connected. The transient reboot mode described above also applies to up to three memories. Any additional memories would use the shallow−reset mode behaviour, and would restart in the initial memory after a shutdown. In any of the above reset modes, the Venture GA3219 hybrid can be configured through ARKonline to reduce the gain as the battery voltage drops. When the supply voltage falls below the low battery threshold, low battery tones are emitted and the wideband gain is reduced by 3 dB. As the battery voltage continues to drop, the low battery tones continue and the wideband gain continues to be reduced. Once the turn−OFF threshold is reached, the device shuts down. Software and Security Venture GA3219 incorporates the following security features to protect the device from cloning and against software piracy:
- DLL protection by password − prevents a third party from using IDS to reconfigure parts.
- Hybrid authentication by 128−bit fingerprint to identify parts in application software − prevents a third party from cloning a device’s EEPROM because the fingerprint cannot be overwritten. Special functions can be used in fitting software to reject parts that do not match the expected fingerprint. This would prevent the piracy of fitting software.
- DLL to hybrid pairing by using a software key in ARK to match product libraries with client software − a part
www.onsemi.com can be ‘locked’ at manufacturing time so that it only communicates with the library it was programmed with. This prevents a third party from potentially upgrading a device with a different library in IDS or other application software. Full software support is provided for every stage of development from design to manufacturing to fitting. For details, refer to the Getting Started with the ARK Software information note. SDA Communication Venture GA3219 is programmed via the SDA pin using industry standard programming boxes. During parameter changes, the main audio signal path of the hybrid is temporarily muted using the memory switch fader to avoid the generation of disturbing audio transients. Once the changes are complete, the main audio path is reactivated. Any changes made during programming are lost at power−off unless they are explicitly burned to EEPROM memory. Improvements have been made to the ARK software for Venture GA3219 resulting in increased communication speed. Certain parameters in ARKonline can be selected to reduce the number of pages that need to be read out. Power Management Venture GA3219 was designed to accommodate high power applications. AC ripple on the supply can cause instantaneous reduction of the battery’s voltage, potentially disrupting the circuit’s function. Venture GA3219 hybrids have a separate power supply and ground connections for the output stage. This enables hearing instrument designers to accommodate external RC filters to minimize any AC ripple from the supply line. Reducing this AC ripple greatly improves the stability of the circuit and prevents unwanted reset of the circuit caused by spikes on the supply line. For more information on properly designing a filter to reduce supply ripple, refer to the Using DSP Hybrids in High Power Applications Initial Design Tips information note. Device Package Shipping† GA3219D−E1 16 Pad Hybrid 25 Units / Bubble Pack GA3219D−E1−T 16 Pad Hybrid 500 Units / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Hybrid Jig Ordering Information To order a Hybrid Jig Evaluation Board for Venture GA3219 contact your Sales Account Manager or FAE and use part number GA3280GEVB.
Table 7. PAD POSITION AND DIMENSIONS
www.onsemi.com PACKAGE DIMENSIONS 0.026 (0.660) 0.016 (0.406) 0.215 (5.46)
0.072 MAX
(1.83) 0.124 (3.15) Dimension units are in inches. Dimensions in parentheses are in millimeters, converted from inches and include minor rounding errors. 1.000 inches = 25.4 mm Dimension tolerances: ±0.005 (±0.13) unless otherwise stated.
- = location of Pin 1 RoHS compliant hybrid, MSL#4, 240°C peak reflow, SAC305 This Hybrid is designed for either point−to−point manual soldering or for reflow according to ON Semiconductor’s reflow process. GA3219D − E1 XXXXXX ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidia ries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 GA3219/D HRX is a trademark of Semiconductor Components Industries, LLC. thinSTAX, FRONTWAVE and ARKonline are registered trademarks of Semiconductor Components Industries, LLC. LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative