TA8573FN TOSHIBA | Alldatasheet
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Technical content
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC High-Frequency Modulation IC for Laser Diode The TA8573FN is a high frequency modulation IC for laser diode. This product is designed for PUH (Pick Up Head) of optical disc drive. FEATURES — YA @ The TA8573FN operates with a single 5V power supply. WU® © The TA8573EN is suitable to connect with a >” cathode-common laser diode. @ Modulation frequency is adjustable from 150MHz to 400MHz. SSOP10-P-0.65A © Modulation amplitude is adjustable from OmAp-p to Weight : 0.04g (Typ.) 50mAp-p. @ The TA8573FN can drive until 30mAp-p. @ The TA8373FN monitors LD-pin connection. When LD voltage is lower than 1.25V, power save mode is selected (I¢¢ =3.5mA (Typ.)). @ Low current consumption =7mA (Typ.). @ The TA8573FN is suitable to design a PUH circuit with a few external parts. @ Small package : SSOP10-P-0.65A 980910EBA1 @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook. Sire products described in this document are subject to the foreign exchange and foreign trade laws. The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual Property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. @ The information contained herein is subject to change without notice. 1998-11-20 1/7
6290) 1 @ nc ‘Amplitude ‘Amplitude vec © = YEG) mvc @ ne Te 150nH Loa HF APC | Control Block Vref a Sno © xc Reference
DESCRIPTION
- High frequency modulation @ The TA8573FN suppress a laser diode noise by high frequency current. So this high frequency current is supplied from APC block, a lower consumption system of high frequency modulation is realized. @ The frequency of modulation is adjustable by an external resistor (R F-Adj). Adjustable range of f (WFIM) = 150MHz~400MHz Accuracy of setting frequency S +20% @ The amplitude of modulation is adjustable by an external resistor (R A-Adj). Adjustable range of | (HFM) =0~50mAp-p 2. Power save mode The TA8573FN monitors a laser diode voltage (LDA-pin voltage). When this voltage is lower than 1.25V, VCO circuit function stops and power save mode is selected. (I¢¢ = 3.5mA (Typ.)) 1998-11-20 2/7
| PIN No. PIN NAME FUNCTION
1 F-Adj Frequency of modulation adjusting pin
J (An external resistor is connected between this pin and ground.)
2 A-Adj Amplitude of modulation adjusting pin
J (An external resistor is connected between this pin and ground.) Power supply pin LDA Output pin (Anode of laser diode is connecting with this pin.) [5 [GND |Groundpin SSCSSSCS~S [6 [Ne [Non connedion pin SCS [8 |_Nc__|Non connection pin SCY [9 | _NC___|Non connection pin SSS PIN ASSIGNMENT (TOP VIEW) oO Fadj Wt 10M nc andj M2 5 ia vec B afl nc Loa la 7B nc no fs 6M nc 1998-11-20 3/7
MAXIMUM RATING (Ta = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Power Supply Voltage Input Pin Voltage =0.3~Vcc +0.3 Output Drive Current (DA) | lour_| 30 | mA | [consumption current | lec | | ma | Storage Temperature —55~150 RECOMMENDED OPERATION CONDITION CHARACTERISTIC SYMBOL RATING UNIT Power Supply Voltage [Veo | 45-55 | v4 Operating Temperature ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Vcc =5V, Ta = 25°C) 1. Current Consumption TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Power Supply Current _ (Active Mode) lec 1 |Mipa=2.3V 7 emp’ [ww [= hue [Poet oto Power Save Mode! Ipsv VLDA = 1.0V 2. Output Block TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT [DC Curent of HFM | loscipq| 3 |Mipa=23v_| 18 | 22 | -30 | ma | *Current Amplitude of | R, j=5kQ 2 Ap-| FOutput Voltage of LDA Pin [| Vop [—[ sd ef a3] ar] v 3. Oscillator Block TEST CHARACTERISTIC SYMBOL | CiR- TEST CONDITION TYP. | MAX. | UNIT CUIT Frequency Adjustable Rang | fox] — |__| 150] | 400 | wir | 215MHz (Rr-adj = 20k) Accuracy of Setting Frequency| Tfosc 300MHz (Rr-Adj = 11k) -20 +20 % 350MHz (Rr-aqj = 9.1k) 4. Power Save Block TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Monitoring Voltage of LDA pin] Vref [5 [ 0 25 | 5s TV | The data marked by an asterisk (*) are shown for only reference purpose. 1998-11-20 4/7
(1) Power Supply Current (2) Power Supply Current (Active Mode) (Power Save Mode) 4as~ 45~ ® Jssv ® Jossv © (2) Vee Vee Chia Coa 23V. tov. a No a GND O O (3) DC Current of HFM (4) Accuracy of Setting Frequency 4s~ 4s~ Bosv Jos e) © 91k. vec vec rome @®-C] toa CJ iva Fad Ly 19~ @ ONT No a GND O O (5) Monitoring Voltage of LDA Pin ® Js Vec toe C4 my GND O 1998-11-20 5/7
- Reference Data Frequency Adjustable Characteristic Amplitude Adjustable Characteristic pi ttitifijy oo ., Nw Tit tl AEE] oes Zot \\ ETN > EXEC OI \\ PCP SEEET COE » ae z — < ie 2 2 EEEEEEee 6° ELLE titi tt tt | ; 5 15 25 35 45 5 15 25 35 45 Fig.1 External Resistor (R F-Adj) (k®) Fig.2 External Resistor (R A-Adj) (kQ) 1998-11-20 6/7
SSOP10-P-0.65A Unit : mm 10 6 NMHOgY HL ft d| 6 + 1) SIRS | 15] TWOEY dou O.SSTYP| 1 5 $2+0.1 OTe 4.0MAX. 3.7401 cho _ 3 % L tht} a} 4) = =. s A % O 3 “| 3 oo) Weight : 0.04g (Typ.) 1998-11-20 7/7