|
|
PDF GA3227 Data sheet ( Hoja de datos )
| Número de pieza | GA3227 | |
| Descripción | Pre-configured DSP System | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de GA3227 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
CONSOLIDATOR GA3227
Pre-configured DSP System
for Hearing Aids
Description
The CONSOLIDATOR GA3227 hybrid is a DSP system based on a
two−channel compression circuit. It can be configured as a single
channel linear device or a single, or dual, channel WDRC device. It
can efficiently replace traditional analog hearing aid compression
circuits without compromising fundamental performance
requirements.
The Consolidator GA3227 hybrid can be configured as an extended
programmable circuit or a trimmer circuit supporting manual
configuration. As a trimmer circuit, it continuously monitors trimmer
positions and translates them into the hearing aid parameters of choice.
Also included in the Consolidator GA3227 is an in channel squelch
circuit used to attenuate microphone and circuit noise in quiet
environments, containing low distortion compression limiting,
programmable high and low cut filters, and a fully accessible
bi−quadratic filter.
The hybrid code programmed into the Consolidator GA3227
controller chip is ‘2’.
Features
• Efficient, High Fidelity 1 or 2−Channel WDRC Signal Processing
• Fully Programmable via Serial Data Interface
• One DLL Operation
• Four Trimmer Inputs plus Volume Control or Programmer
Controlled
• Flexible Trimmer/Parameter Assignments
• Three−Terminal Trimmers
• Wideband Level Detection
• Choice of Two AGC−I Parametric Adjustment Strategies
• 6, 12 or 24 dB/Octave Band Split Filter or Configurable as
Single−Channel Compressor
• In−Channel, Low−Level Squelch Control (1:2 Expansion)
• Output Compression Limiting (AGC−O)
• Flexible Pre− and Post−Emphasis Filters
• Three Independent Memories
• Pulse−Density−Modulated Output Stage Drives Zero−Bias
2−Terminal Receivers
• These Devices are Pb−Free and are RoHS Compliant
Standard Packaging
• Hybrid Typical Dimensions:
0.150 x 0.250 x 0.046 in.
(3.81 x 6.35 x 1.17 mm)
www.onsemi.com
20 PAD
HYBRID
CASE TBD
PAD CONNECTION
VREG VREG2 VIN
GND2 17 18 19 20 1
TIN
GND 16
2 MGND
VC 15
3 TR3
TR1 14
4 TR4
TR2 13
5 VB
MS2 12
6 PGND
MS1 11 10 9
8 7 VBP
SDA OUT+ OUT−
(Bottom View)
MARKING DIAGRAM
GA3227−E1
XXXXXX
GA3227
E1
XXXXXX
= Specific Device Code
= RoHS Compliant Hybrid
= Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 11 of
this data sheet.
© Semiconductor Components Industries, LLC, 2014
January, 2015 − Rev. 6
1
Publication Order Number:
GA3227/D
1 page  
CONSOLIDATOR GA3227
Table 3. ELECTRICAL CHARACTERISTICS − PART 2
Parameter
Min
Max
Units
Accuracy
WIDEBAND SYSTEM GAIN
Wideband System Gain
−36 12
dB Type 3
Wideband Attack Time Constant (Fast & Slow)
0.25 8192
ms Type 1, 3
Wideband Release Time Constant (Fast & Slow)
0.25 8192
ms Type 1, 3
External VC
−48 0
dB Type 3
Internal VC Attenuator
−48 0
dB Type 3
TOTAL SYSTEM GAIN
Total System Gain
−19 83
dB (Note 1)
AGCo
AGCo Output Limiting
−30
−1
dBFS*
Type 3
AGCo Compression Ratio
∞:1
∞:1
Ratio
N/A
PEAK CLIPPER
PC Output Limiting
−40
0
dBFS
Type 3
TONE GENERATOR
Pure Tone Frequency
(memory and low battery indicator)
0.25 12 kHz Type 1, 2
Pure Tone Amplitude
(memory and low battery indicator)
−50
0
dBFS
Type 3
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. Total System Gain consists of: Wideband System Gain + High and Low Independent Channel Gains + Converter Gain and accuracy of this
parameter is dependent on accuracy of the components.
*Peak output is defined as largest sine wave possible at the resonant frequency of the receiver.
NOTE: Type 1: Accuracy is determined by the clock frequency deviation
Type 2: Accuracy is determined by the quantization error of 16 bit coefficient and 20 bit or higher data word
Type 3: Accuracy is determined by the quantization error of a parameter word (see Table 2 for word length) and 20 bit or higher data
word
TYPICAL APPLICATIONS
VB
VREG2 19
VREG 18
3k9 IN
20
1
1k T
REGULATOR
A/D
MGND 2
GA3227
MS2
12
MS
11
SDA
10
PROGRAMMING
INTERFACE
EEPROM
TWIN DETECTOR
T−coil EQ
1st to 3rd
ORDER
LC
HP
24 db/oct
BAND SPLIT
FILTER
LP
COMPRESSOR
TWIN DETECTOR
SQUELCH
COMPRESSOR
TWIN DETECTOR
SQUELCH
S
1st or 2nd
ORDER
HC
Bi−Quadratic
Filter
TRIMMER INTERFACE
15 14 13
3
4
VC TR1 TR2 TR3 TR4
Note: All resistors in ohms and all capacitors in farads, unless otherwise stated.
TONE
GENERATOR
5
AGC−O
TWIN DETECTOR
VC GAIN
7
PEAK
CLIPPING
D/A
HBRIDGE
8
9
6
16 17
Figure 2. Test Circuit
OUT
LP FILTER
www.onsemi.com
5
5 Page 
CONSOLIDATOR GA3227
The fourth option is to have the gain reduced as the battery
voltage drops. When the supply falls below the low battery
threshold the low battery tones will be emitted and the
wideband gain will be reduced by 3 dB. As the battery
voltage continues to drop, the low battery tones will
continue and the wideband gain will continue to be reduced
until the turn−OFF threshold is reached when the device will
shut down.
An additional option configurable via ARKonline is to
have the gain reduced as the battery voltage drops. When the
supply falls below the low battery threshold, the 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 until the turn−OFF threshold is reached as the
device shuts down.
Current Consumption
Typical current consumption of the Consolidator GA3227
Digital, as stated in the Electrical Characteristics section, is
measured at a specific configuration and settings.
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 ARK Software
Guide.
SDA Communication
The Consolidator GA3227 Digital is programmed via the
SDA pin using industry standard programming boxes.
During parameter changes the main audio signal path of the
hybrid is temporarily disabled and replaced with a low gain
bypass path to avoid the generation of disturbing audio
transients. Once the changes are complete, the main audio
path is re−activated.
Any changes made during programming are lost at
power−off unless they are explicitly burned to EEPROM
memory.
Power Management
The Consolidator GA3227 Digital 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. The
Consolidator GA3227 has a separate power supply and
ground connection 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.
ORDERING INFORMATION
Device
GA3227−E1
GA3227−E1−T
Package
20 Pad Hybrid
20 Pad Hybrid
Shipping†
25 Units / Bubble Pack
250 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 Consolidator GA3227 contact your Sales Account Manager or FAE and use part
number GA3227GEVB.
www.onsemi.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet GA3227.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| GA3224 | Preconfigured DSP System | ON Semiconductor |
| GA3227 | Pre-configured DSP System | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |