Digital/Audio Interface Transformers Digital/Audio Interface Transformers: Schott Corporation works closely with Cirrus Logic to deliver digital/ audio interface transformers which meet strict requirements for impedance, wave form, balance and dielectric strength. our hand-wound, toroidal T-case transformer is designed for applications requiring a totally enclosed unit. Our ER9.5 transformers are machine wound and assembled to assure close parameter control while maintaining full interchangeability with the traditional T-case configuration, and are available with an electrostatic shield. These transformers are also available with alternate turns ration for impedance balancing and higher signal voltage applications. Semiconductor/Transformer Application: The Cirrus Logic CS8401, 8402, 8411 and 8412 CMOS devices are designed for transmission and receipt of digitized audio data. Used with Schott transformers they enable encoding, transmitting, receiving and decoding of audio data according to AES3-199X, EBU 3250, IEC 958, ANSI S4.40-1985, and EIAJ CP340 requirements. Though transformers are not required by the AES, they are highly recommended to reduce common-mode noise and possible cabling ground loops. Special attention has been given to the reduction of interwinding capacitance, with less than 2.0 pF in the electrostatically shielded model. All models feature a bandwidth of 1.0 to 10 MHz, sufficient for the biphase-mark-encoded, audio-data rate of 25 - 55 kHz, but narrow enough to attenuate out-of-band noise. Specifications Leakage Interwinding DCR DCR Inductance Inductance Capacitance Primary Secondary uH uH pF Ohms Nom Ohms Nom Schott P/N Previous Schott P/N Turns Ratio Configuration Schematic Code 22083 67125450 1:1 225 <0.3 <15 0.40 0.40 T Case 5 22133 67129600 1:1 225 <0.7 <2 0.10 0.10 ER 9.5-6 Pin THD Ele ctro static Shie ld 4 22160 67128990 1:1 225 <0.55 <15 0.10 0.10 ER 9.5-6 Pin THD T Case Re p lace me nt 1 22523 67137640 1:1.22 225 <0.7 <2 0.10 0.10 ER 9.5-6 Pin THD Shie ld fo r 70/110 Ohms 4 24393 67146420 1:3 225 <0.4 15 0.12 0.36 ER 9.5-6 Pin THD fo r Hig he r Sig nal Vo ltag e Ap p licatio ns 1 37211 29398 1:1 225 <0.4 <15 0.10 0.10 ER 9.5-8 Pin SMD 2 37246 27353 1:1 225 <0.7 <2 0.10 0.10 ER 9.5-8 Pin SMD 3 Parts availability subject to Schott manufacturing schedules and leadtimes. Not all parts available from stock. Please contact us for more details and availability. The Adobe Acrobat Reader is required to view these linked documents. Electrical Specifications Test Criteria 1. Electrical characteristics are reported for operating at 25°. The transformers are designed for operating at -40° to +130°. 2. Inductance is measured at 10 kHz, 0.1V. 3. Bandwidth is measured at +/-0.25 dB, 110 ohms. 4. Leakage inductance is measured at 100 kHz, with all other windings shorted. 5. Interwinding capacitance is measured at 100 kHz, between primary and all other windings tied together. All data is believed to be accurate at time of printing. Schott Corporation reserves the right to make changes without notification. “Schott” is a trade name of Schott Corporation. All other trademarks and trade names are the property of their respective holder. © 2001 Schott Corporation 1000 Parkers Lake Road, Wayzata, Minnesota 55391 U.S.A. Tel: + (952) 475-1173 Fax: + (952) 475-1786 Email: [email protected] Web: http://www.schottcorp.com T CASE ER9.5 THD .650 MAX .500 MAX. 1 SCHOTT 4 2 YY/WW 3 .350MAX. SCHOTT YYWW .385 MAX 4 .020 SQ PINS(6X) 1 # 24 AWG .250MAX .250 MAX .125 –.015 .125 (6X) .090 .080 .350 .330 .200 CTR (2X) .200–.010 .400 CTR .400–.010 .100 (2X) ER9.5 SMD RECOMMENDED PAD LAYOUT .510 MAX (12.95) 4 5 YYW W 1 .100 TYP (2.54) SCHOTT .400 MAX (10.16) .040 (1.0) .245 (6.22) 8 .470 (11.94) MARKING W/ DOT FOR 1 PIN .305 MAX 7.75 .440 –.020 (11.18 –.51) .100 (2.54) NOTE: COPLANARITY < .006 SCHEMATICS 1 2 2 3 1 6 1 5 1 8 3 4 4 8 4 6 5 4 5 2 1 3 6 1 3 4 2 4 5 All statements and technical information contained herein are believed to be accurate, but the accuracy and completeness thereof is not guaranteed. If any product is found to be defective, Schott Corporation’s (Seller) only obligation shall be to replace such quantity of the product proved to be defective. User shall determine the suitability of the product for the intended use, and user assumes all risk and liability whatsoever in connection herewith. Seller shall not be liable for any direct, consequential, or incidental loss or damage. Conditions not specifically stated herein shall be governed by established trade customs. Schott Corporation reserves the right to makes changes without notification. “Schott” is a trade name of Schott Corporation. All other trademarks and trade names are the property of their respective holder. ©2001 Schott Corporation Schott Corporation 1000 Parkers Lake Road Wayzata, Minnesota 55391 U.S.A. Tel: + (952) 475-1173 Fax: + (952) 475-1786 Email: [email protected] Web: http://www.schottcorp.com