T R I Q U I N T S E M I C O N D U C T O R, I N C . TQ8218/19 1 VLEVEL 2 GND 3 N.C. 4 N.C. 5 * -5V PRELIMINARY DATA SHEET 28 VEE 27 VEE 26 GND 25 N.C. 24 VDRIVE** Features 23 VDRIVE** • High performance fully backterminated 80mA/4V output driver(TQ8218) OC48/STM16 O/E Driver TELECOM PRODUCTS VSYMX 50Ω GND 6 50Ω DIN 7 22 NDOUT NDIN 8 21 DOUT GND 9 20 VDRIVE** VTT 10 19 VDRIVE** VDD 11 18 VEE GND 12 17 VEE 16 N.C. • Output symmetry adjust 15 GND • LVPECL input VSEN10 13 VSEN1 14 50Ω 50Ω -5V 50Ω 5Ω • Also available without backterminations for 25Ω applications (TQ8219) • Output can drive 50Ω external optical modulator, 50Ω transmission line, or directly modulated laser from LVPECL input • NRZ data rates to 3.125Gbs • 65-130pS rise/fall time * Downset paddle is GND ** N.C. ON TQ8219 • 28 pin TSSOP small outline package • +3.3, -5V power supply The TQ8218/TQ8219 is a low jitter, high performance optoelectronic driver intended for interfacing LVPECL or CML outputs from a multiplexer or clock recovery device to various O/E devices, including uncooled DFB lasers, high power VCSEL arrays, EA modulators and Mach-Zender modulators. The devices’ symmetry and level controls, low additive jitter, and excellent rise/ fall times while driving significant loads allow the highest system level performance at low cost. The small footprint makes the devices particularly suitable for high port count WDM applications. • –40 to +100°C case operating temperature range Applications • VCSEL driver • Driving uncooled DFB lasers • Single-ended 50 Ω 4.0V electro-absorptive modulator driver • 8V differential 50Ω Mach-Zender driver Rev 0.0.A 1 TQ8218/TQ8219 PRELIMINARY DATA SHEET 2.5Gb/s Output Driver The TQ8218 has a high power output stage to provide an output level suitable for directly driving a 4V modulator or 80mA laser. The separate power supply pin for the output stage is VDRIVE. When VDRIVE is 3.3V the back terminated output driver swing can be between 0.75V to 4V. This corresponds to 15-80mA into a 50Ω forward load. The amplified OC48/STM16 NRZ output stream is available as a differential or single ended signal at DOUT and NDOUT. The unused Figure1. Level Control Circuit +3.3V VDRIVE 50Ω 50Ω DOUT NDOUT Pre Amp output in single ended driver applications must be terminated. The TQ8219 is designed without back-termination resistors and is capable of switching 160mA of current accross an external 25Ω load. The output is available differentially or single-ended at DOUT and NDOUT. The unused output in single ended applications must be terminated in the same manner as its complement. The data crossing level of the output eye can be adjusted using VSYMX. VSYMX is preset internally to provide a 50% duty cycle when it is left open (N.C.). The output current level and voltage amplitude at DOUT and NDOUT can be set using an external feedback control loop. To set the output current level, connect an external current source, Isource, equal to 10% of the desired output, to VSEN10. Connect VLEVEL, VSEN10 and VSEN1 to an amplifier, as shown in Figure 1, with a minimum input common mode range of (Isource*50Ω). The choice of the external current source also sets the output voltage swing. VLEVEL VSEN1 Isource 5Ω 50Ω VSEN10 3mA - 16mA VEE -5.0V Note: 50 Ohm back termination resistors and VDRIVE pin are not present in the TQ8219 Rev 0.0.A 2 For example, to achieve the maximum swing of 4V into 25Ω (TQ8218’s 50Ω internal back-terminated impedance in parallel with a 50Ω forward load), a 16mA source must be used (Isource*10*25Ω =160mA*25Ω = 4V). TQ8218/TQ8219 PRELIMINARY DATA SHEET Type Pin Number Description DIN NDIN LVPECL Input LVPECL Input 7 8 DOUT NDOUT High Drive Output High Drive Output 21 22 VSYMX Analog Input 1 Serial data input. Internally terminated by 50 Ohms to VTT Complement of DIN. Internally terminated by 50 Ohms to VTT High power differential driver modulated output. Complement of DOUT. If unused must be terminated in the same manner as DOUT. Rise/fall time symmetry adjust control signal input. Input impedance is typically 10k Ohm. VLEVEL Analog Input 2 VSEN10 Analog I/O 13 VSEN1 Analog Output 14 Power Pins Signal VTT VDD GND VEE VDRIVE NC Description Input Termination Supply Pre-drive and I/O VDD Supply Ground Supply High Drive Output Stage Neg. Supply High Drive Output Stage Pos. Supply Do Note Connect TELECOM PRODUCTS Signal SONET/SDH/ATM PRODUCTS Table 1. TQ8218/19 Pin Descriptions Output data amplitude adjust control signal input. Input impedance is typically 10k Ohm. Output current level reference pin. When driven with an external current source at exactly 1/5 the output current of the TQ8218 (1/10 for the TQ8219) level, the voltage at Vsen10 is equal to that at Vsen1. Can be used to implement a control loop. Output current level sensing pin. Vsen1 voltage is directly proportional to the output current level. Connects internally to 5 Ohm resistor in differential driver current tail. Pin Number 10 11 3, 6, 9, 12, 26, 15, Package Down Paddle (required) 28, 27, 18, 17 24, 23, 20, 19 (Note: These pins are unused in the TQ8219) 4, 5, 25, 16 Rev 0.0.A 3 TQ8218/TQ8219 PRELIMINARY DATA SHEET Table 2. Absolute Maximum Ratings Parameter Symbol Min Max Unit Supply voltage VDD 0 3.5 V Output stage supply voltage VDRIVE VEE 4.0 V Output stage supply return VEE -5.5 0 V PECL inputs GND-0.5 VDD+0.5 V Control signals VEE-0.5 GND+0.5 V Tstg, Storage Temperature -55 150 oC Tj, Maximum junction temperature 150 oC Electrostatic Discharge (Human Body Model) 1000 V Notes: 1. All voltages with respect to GND. Table 3. Recomended Operating Conditions Signal VDD IDD Parameter Pre-drive and I/O supply voltage range Supply current between VDD and VEE Min 3.16 Vdrive VEE IEE VTT Tc Pdiss Output stage power supply Negative supply voltage Vee supply current Load Termination Supply Voltage 3 Case temperature measured at the downpaddle Power dissipation4 0 -5.5 Notes: TBD -40 Typ 3.3 3.0 Max 3.46 Units V mA +3.3 +3.45 -5.0 -4.75 Idrive+45 VDD–2.0 TBD 100 1.6 1.75 V V mA V oC W 1. Room Temperature condition 2. VDRIVE-VEE at operating range. 3. The VTT value shown is for DC coupled LVPECL I/O. For AC coupled LVPECL I/O Vtt is nominally at VDD-1.3V. 4. VDRIVE , VEE , and VTT at operating range. Table 4. DC Supply Guidelines and Equations Signal VDRIVE-VEE Vdrive Idrive Parameter Output stage supply voltage range1 Output stage power supply Supply current for output stage between VDRIVE and VEE2 Min 5 0 30 Typ 8.3 +3.3 Max 9 +3.45 160 Units V V mA DC Coupled 50 Ohm Load terminated to VTerm AC Coupled 50 Ohm Load terminated to VTerm VDrive = (VccDrive-VeeDrive) DOUTlogicHigh = VDrive - ((VDrive - VTerm)*0.5)) DOUTlogicLow = (DOUTlogicHigh - (ITotal*25)) VDrive = (VccDrive-VeeDrive) DOUTPk-Pk = (ITotal*25) DOUTCommonMode = VccDrive - ((ITotal*25)/2) Note: For proper operation DOUTlogicLow > -2V Note: For proper operation DOUTlogicLow > -2V Rev 0.0.A 4 TQ8218/TQ8219 PRELIMINARY DATA SHEET Input common mode voltage range Input differential voltage (pk-pk)1 Input termination resistance2 Input capacitance Notes: Symbol Minimum Nominal Maximum Unit VICOM VIDIFF RIN VDD – 1500 600 — — 50 VDD– 1100 2400 mV mV Ohm CIN — 0.5 TBD pF TELECOM PRODUCTS Parameter SONET/SDH/ATM PRODUCTS Table 5. DC Characteristics—LVPECL Input 1. Differential Input Peak-Peak = 2| Vin - NVin | 2. The inputs are terminated through Rin to VTT. For DC coupled LVPECL VTT is nominally VDD -2.0V. For AC coupled LVPECL VTT is nominally VDD - 1.3V. Table 6. Control Signal Specifications Signal VSYMX Symbol Vsymx Asymx Vdef Zsymx Parameter VSYMX operating voltage linear range Output data crossing level adjust gain Default level VSYMX input impedance Min VLEVEL Vlevel Aamp Vdef Zlevel VLEVEL operating voltage linear range Output data amplitude adjust gain Default level VLEVEL input impedance Vee VSEN1 Zsen1 VSEN1 equivalent resistance 4.5 VSEN10 Vsen10 Zsen10 Isen10 Control current input voltage level VSEN10 equivalent resistance VSEN10 input current range Vsenrat VSEN10 to VSEN1 Ratio Typ -3.7 to -2.7 25 -3.2 10 Max Units V %/V V kΩ -100 mV V/V V kΩ 5 5.5 Ω Vee 45 0 50 Vee+1 55 17.6 V Ω mA 9.9 10 10.1 1.2 -3.2 10 Rev 0.0.A 5 TQ8218/TQ8219 PRELIMINARY DATA SHEET Table 7. 2.5Gb/s High Speed Output Signal Specifications Signal Symbol Description Min DOUT NDOUT (Note 1) Imod_18 Imod_19 Tpw Trise Tfall Jpp Vmean_max TQ8218 Modulation current into nominal load TQ8219 Modulation current into nominal load Output data pulse width Output data rise time (20% - 80%) Output data fall time (20% - 80%) Output data peak-peak jitter (Note 3) Output data typical pk-pk for high output applications; Vlevel =tbdV, Vdrive = +3.3 V (Note 2) Output data typical pk-pk for low output applications; Vlevel = tbdV, Vdrive = +3.3 V (Note 2) Min. data crossing lvl. adjustment range with VSYMX at -3.7V Max. data crossing lvl adjustment range with VSYMX at -2.7V Absolute variation in output data crossing level over full VLEVEL operating range Overshoot Undershoot Ripple NRZ data rate 15 30 95 65 65 Vmean_min Xingmin Xingmax DXing %over %under %ripple RATE Notes: 3.85 Nom 100 TBD 4.0 Max Units 80 160 105 130 130 mA mA % ps ps ps V 0.75 20 60 -5 - V - 40 80 +5 % % % 3125 10 10 10 % % % Mbs 1.Refer to Figure 2. All specifications for output data apply under the following conditions: Output Data Pattern: 223 -1 PRBS, 2.48832 Gbit/s DOUT and NDOUT termination: TQ8218: 50 Ohms to GND TQ8219: 25 Ohms to +3.3V Termination network return loss: >-20 dB, 0 to 1 GHz (TQ8218 only) >-10 dB, 1 to 3 GHz >-6 dB, 3 to 5 GHz Vlevel: over specified operating range VSYMX: adjusted to give 50% data crossing 2.This specification applies to the Vmean measurement shown in Figure 2. Vlevel must be adjusted to the specified level and VSYMX must be adjusted for optimum eye crossing level before making data eye measurements. 3. Rev 0.0.A 6 Peak to Peak jitter is defined as the difference between the measured jitter on the device and the test system jitter. TQ8218/TQ8219 Mean ‘1’ Level Trise, Tfall Trise, Tfall Vripple Vover 100% 80% Vmean Vmin Vmax Tpw Data Crossing Meas. 20% 0% Jpp Vripple Jpp Vunder Mean ‘0’ Level Tpw = V max = V min = V mean = Trise = Tfall = % over = % under = % ripple = Jpp = half of input waveform period maximum peak-to-peak voltage minimum peak-to-peak voltage (eye interior) Mean peak-to-peak voltage (mean eye opening) 20% to 80% rise time, mean ‘0’ to mean ‘1’ 20% to 80% fall time, mean ‘0’ to mean ‘1’ Vover/Vmean X 100% Vunder/Vmean X 100% Vripple/Vmean X 100% peak-to-peak data crossing jitter Note: mimimum display persistence of 2 s is assumed for the above measurements. Rev 0.0.A 7 TELECOM PRODUCTS Figure 2. 2.5 Gb/s Output Data Eye Diagram SONET/SDH/ATM PRODUCTS PRELIMINARY DATA SHEET TQ8218/TQ8219 PRELIMINARY DATA SHEET Figure 3. Typical TQ8218 Output Data Eye at 3.125Gb/s Note: Baseline input jitter from the BERT is typically 12.6pS pk-pk. Also note that the jitter measurment shown is unfiltered, wideband jitter. Rev 0.0.A 8 TQ8218/TQ8219 SONET/SDH/ATM PRODUCTS PRELIMINARY DATA SHEET 1.00 1.00 DIA. TELECOM PRODUCTS Figure 4. TSSOP-28 Downpaddle Package Mechanical drawing C B 3 2 1 B E/2 1.00 MIN A A1 A2 b b1 c c1 D E1 e E L N P P1 NOM MAX 1.1262 .0254 .1500 .8500 1.0500 .1900 .3000 .1900 .2500 .0900 .2000 .0900 .1600 9.6000 9.8000 4.3000 4.4000 4.5000 .6500 .6500 .6500 6.4000 .5000 .6000 .7000 28 5.000 5.5000 3.0000 3.0100 C L E E1 SEE DETAIL "A" TOP VIEW END VIEW (b) b1 b A2 WITH PLATING A aaa Note: All dimensions in millimeters (mm). e A1 D SIDE VIEW C c1 (c) SEATING PLANE BASE METAL SECTION "B-B" Moisture Level Rating 3 per JEDEC Standard J-STD-020A (14o) P 0.25 P1 (OC) L (1.00) EXPOSED PAD VIEW DETAIL 'A' (14o ) (VIEW ROTATED 90oC.W.) Ordering Information: TQ8218 TQ8219 Back-Terminated Laser Driver Non Back-Terminated Laser Driver For Die Level Drivers Please Contact: [email protected] For further information on this or related products: web: http://www.triquint.com e-mail: [email protected] The information provided herein is believed to be reliable; TriQuint assumes no liability for inaccuracies or omissions. TriQuint assumes no responsibility for the use of this information, and all such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. TriQuint does not authorize or warrant any TriQuint product for use in life-support devices and/or systems. Copyright © 2001 TriQuint Semiconductor, Inc. All rights reserved. July 2001 Rev 0.0.A 9 TQ8218/TQ8219 PRELIMINARY DATA SHEET Known Device Issues as of July 5, 2001 1. VLEVEL control input should be limited to 2 mA or VEE + 2.5V to avoid damaging the device. Rev 0.0.A 10