| AC97 PC AUDIO RESITOR NETWORK SW AC97 PAC AC97 pin to pin compatible, Stable resistor network Signal conditioning and gain setting resistors for all standard audio functions Low noise thin film resistors ± 1% match Gain modification by changing resistors externally Better than –90 dB Inter-channel and channel-to-channel crosstalk Analog audio system for Pentium II Class personal computers, used in conjunction with Audio Codec, CS4297, or AD1819A The SWAC97 provides the components necessary for signal conditioning of analog audio inputs for an AC97 compliant Codec as well as gain setting resistors for headpfone and microphone amplifiers. Since analog signal levels can be as high as 2 Vrms, the SWAC97 provides 6 dB of attenuation (to 1 Vrms) for LINE-IN, AUX, and CD inputs. The CD line level inputs of the SWAC97 have an additional ground signal, CD_GND, that supports the pseudo differential amplifier present in AC97 Codecs. This feature facilitates attenuation of common mode ground noise typically present at the output of CD ROM drives. Connecting the CD pins as indicated in the application circuit provides attenuation of common mode noise from the CD inputs, thereby producing a higher quality CD signal. Finally, the device provides gain-setting resistor for the headphone and microphone amplifiers. The SWAC97 provides exceptional Inter-channel and channel-to-channel crosstalk attenuation necessary for high quality audio. These products are manufactured using advanced thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold interconnect metalization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. In die form, these products are ideal for hybrid and multichip module applications. In package form, these products are the best solution where space and weight are a concern. SEMICONDUCTOR-THIN FILM MANUFACTURING PROCESS DESCRIPTION Integrated passive networks are manufactured using advanced thin film technologies including ultra -stable and self passivating Tantalum Nitride resistors, gold interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. Thin film resistor technology is the preferred solution for all applications that require low noise, long term stability and excellent performance at very high frequencies. Semiconwell employs proprietary thin film technologies for deposition of a wide range of sheet resistance films from 1W/sq to 10,000W/sq. All Semiconwell's products are available in die form and as KGD, known good die and are ideal for high reliability hybrid and multi chip module applications. Besides thin film resistors, Semiconwell integrates capacitors, Schottky diodes, Zener diodes and transistors. Integrated passive and active networks are manufactured using Semiconwell's in house high reliability semiconductor manufacturing processes. All semiconductor devices employ precision doping via ion implantation, silicon nitride junction passivation, platinum silicided contacts and gold interconnect metallization for best performance and reliability. MNOS capacitors and Tantalum Nitride resistors are easily integrated with Schottky diodes to provide complete standard and custom RCD solutions. In die form, these products are ideal for hybrid and multi chip module applications. In packaged form, these products are the best solution where space and weight are a concern. |
| SEMICONWELL
Integrated Passive Networks |
AC97 PC AUDIO RESITOR NETWORK SW AC97 |
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| SHORT PRODUCT APPLICATION NOTE |
| The SWAC97 provides the components necessary for signal conditioning of analog audio inputs for an AC97 compliant Codec as well as gain setting resistors for headpfone and microphone amplifiers. Since analog signal levels can be as high as 2 Vrms, the SWAC97 provides 6 dB of attenuation (to 1 Vrms) for LINE-IN, AUX, and CD inputs. The CD line level inputs of the SWAC97 have an additional ground signal, CD_GND, that supports the pseudo differential amplifier present in AC97 Codecs. This feature facilitates attenuation of common mode ground noise typically present at the output of CD ROM drives. Connecting the CD pins as indicated in the application circuit provides attenuation of common mode noise from the CD inputs, thereby producing a higher quality CD signal. Finally, the device provides gain-setting resistor for the headphone and microphone amplifiers. The SWAC97 provides exceptional Inter-channel and channel-to-channel crosstalk attenuation necessary for high quality audio. These products are manufactured using advanced thin film technologies including ultra-stable and self passivating Tantalum Nitride resistors, gold interconnect metalization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. In die form, these products are ideal for hybrid and multichip module applications. In package form, these products are the best solution where space and weight are a concern. |
| SEMICONDUCTOR-THIN FILM MANUFACTURING PROCESS DESCRIPTION |
| Integrated passive networks are manufactured using advanced thin film technologies including ultra -stable and self passivating Tantalum Nitride resistors, gold interconnect metallization and reliable MNOS capacitors to achieve excellent uniformity, performance and reliability. Thin film resistor technology is the preferred solution for all applications that require low noise, long term stability and excellent performance at very high frequencies. Semiconwell employs proprietary thin film technologies for deposition of a wide range of sheet resistance films from 1 W/sq to 10,000 W/sq. All Semiconwell's products are available in die form and as KGD, known good die and are ideal for high reliability hybrid and multi chip module applications. Besides thin film resistors, Semiconwell integrates capacitors, Schottky diodes, Zener diodes and transistors. Integrated passive and active networks are manufactured using Semiconwell's in house high reliability semiconductor manufacturing processes. All semiconductor devices employ precision doping via ion implantation, silicon nitride junction passivation, platinum silicided contacts and gold interconnect metallization for best performance and reliability. MNOS capacitors and Tantalum Nitride resistors are easily integrated with Schottky diodes to provide complete standard and custom RCD solutions. In die form, these products are ideal for hybrid and multi chip module applications. In packaged form, these products are the best solution where space and weight are a concern. |
| RESISTOR SPECIFICATIONS | ||
| Capacitance [pF] | Tolerance q [%] | Power Rating [mW] |
| 5 | 5 | 100mW@70°C/channel |
| Stresses beyond listed absolute maximum ratings may cause permanent damage to the device. |
| STANDARD SPECIFICATIONS | |
| R1,R2,R3,R4,R5,R6,R7,R8,R9,R10,R13,R14 | 6.8KW |
| R11,R12 | 3.4KW |
| R15 | 510KW |
| R16,R17 | 100KW |
| R18,R20 | 4.7KW |
| R21,R23 | 22KW |
| R22,R24 | 33KW |
| Absolute tolerance(0°C to 70°C) | ±5% |
| Matching tolerance | ±1% |
| Interchannel crosstalk (left- right)* | >-90dB@1KHz |
| Channel-to-channel crosstalk * | >-90dB@1KHz |
| Operating temperature range | -55°C to 125°C |
| Power rating/resistor | 100mW |
| Temperature Coefficient of Resistor (TCR) | ±150 ppm |
| Tracking TCR inner-channel resistors (L, R) | ±25 ppm |
| Max package power rating (70 °C) | 1.00% |
| Capacitance | <5pF |
| * Guaranteed by design | |
| PIN OUT | |||
| PIN# | FUNCTION | PIN# | FUNCTION |
| 1 | Line In Left | 15 | CD Left |
| 2 | Line In Right | 16 | CD GND |
| 3 | AC97 Line Right | 17 | CD Right |
| 4 | AC97 Line Left | 18 | MIC AMP OUT |
| 5 | GND | 19 | MIC- |
| 6 | AC97MIC | 20 | MIC+ |
| 7 | GND | 21 | MIC IN |
| 8 | AC97CD Right | 22 | GND |
| 9 | AC97CD GND | 23 | IN2 |
| 10 | AC97CD Left | 24 | AMP2- |
| 11 | AC97AUX Right | 25 | AMP OUT2 |
| 12 | AC97AUX Left | 26 | IN1 |
| 13 | AUXIN Left | 27 | AMP1 |
| 14 | AUXIN Right | 28 | AMP OUT1 |
| GENERAL DIE INFORMATION | ||||
| Substrate | Thickness (mils) | Die size (mils) | Bonding pads | Backside metal |
| SiO2 / Silicon | 10±2 | 90 x 60 ±3 | 4x4 mils, 3mm thick, 99.99% electroplated gold with a TiW barrier | Au/Si compatible with eutectic and conductive epoxy die attach. |
| All Semiconwell products are available in die form for chip and wire hybrid circuits and multi chip modules applications. Typical delivery for standard die products is 3-4 weeks ARO. For Chip Scale Packaged (CSP) devices consult factory for an update on availability of certain products. | ||||
| CONDUCTORS | RESISTORS | BACKSIDE METAL |
| The bonding pads of the resistors are 3µm thick, 99.99% electroplated gold with a TiW barrier that withstands 30 min at 400°C in air without loss of adhesion. | Ultra stable TaN with low TCR <75ppm/°C typical. For Rsq<10W/sq and Rsq>500W/sq, resistive material is proprietary. Power rating/resistor max 100mW for R<1KW and 25mW for R>1KW. Standard tolerance is ±5%. | Backside of the die is metallized with standard Si/Au compatible with eutectic and epoxy die attach. Custom metallizations are available upon special request for die products only. |
| DIE LAYOUT | PACKAGE PIN OUT |
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| Vin=3,4,5,6,11,12,13,14 | |
| Vss=die backside | |
| Vss=1,8,9,16 | |
| Vdd=2,7,10,15 | |
| STANDARD PRODUCTS ORDERING INFORMATION |
| SW PART# | QSOP-28 | TSSOP-28 | BARE DIE |
| SWAC97 | SWAC97-28QS | SWAC97-28TS | SWAC97-28BD |
| SW PART # | QUANTITY | QSOP-28 | U/P($) | TSSOP-28 | U/P($) | BARE DIE | U/P($) |
| SWAC97 | 5,000pc | -28QS | -28TS | -28BD | |||
| SWAC97 | 10,000pc | -28QS | -28TS | -28BD | |||
| For products sold as bare tested die or known good die KGD, minimum order is 5000pc. Dice are 100% functional tested, visual inspected and shipped in antistatic waffle packs. For special die level KGD requirements, different packaging or custom configurations, contact sw_sales@semiconwell.com | |||||||
| Delivery for packaged Resistor networks standard products is 4-6 weeks ARO. Certain items may be available from stock. For standard products available from stock, there is a minimum line item order of $250.0. Inventory is periodically updated. For 2500pc or larger orders, all surface mount packaged devices are shipped in tape on reel (T/R). For smaller quantities, it may vary. Samples are available only for customers that have issued firm orders pending qualification of product in a particular application. On line Orders have to be verified, accepted and acknowledged by Semiconwell sales department in writing before, becoming non cancelable binding contracts. |
| Semiconwell guarantees continuous supply and availability of any of it's standard products provided minimum order quantities are met. |
| SEMICONWELL has made every effort to have this information as accurate as possible. However, no responsibility is assumed by SEMICONWELL for its use, nor for any infringements of rights of third parties which may result from its use. SEMICONWELL reserves the right to revise the content or modify its product line without prior notice. SEMICONWELL products are not authorized for and should not be used within support systems which are intended for surgical implants into the body, to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent. |
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