SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Applications Product Description SONET/SDH-based transmission systems, test equipment and modules OC-48 fibre optic modules Gigabit Ethernet Fibre Channel Wideband RF gain block SiGe Semiconductor offers a portfolio of optical networking ICs for use in high-performance optical transmitter and receiver functions, from 155 Mb/s up to 12.5 Gb/s. SiGe Semiconductor’s SE1230 is a fully integrated AGC amplifier aimed primarily at SONET OC-48 and SDH STM-16 systems. The device may also be used in any datacom application with input data rates up to 2.5 Gb/s. Features Single +3.3 V supply Power dissipation = 230 mW (typ) Noise figure < 12 dB Small signal gain = 23.5 dB differential Fully integrated AGC function On-chip 50 Ω input and output terminations Wide bandwidth (–3 dB) > 2.0 GHz Maximum input level of 200 mVpk AGC output level of 370 mVpk differential Loss of signal functionality Single-ended or differential operation Minimal external components Operating ambient temperature range = -40°C to +85°C Equivalent to Nortel Networks AC10 The device is designed with differential I/Os and signal levels compatible with SiGe Semiconductor’s SE1030 and SE1031 transimpedance amplifiers. A system block diagram is shown after the functional description, on page 4. Optimum performance is provided by differential connections but with appropriate terminations, the device can also be used in single-ended mode if required by the application. Ordering Information Type Package Remark SE1230Q 5 mm, 32 pin LQFP None Functional Block Diagram INP Variable Gain INN OUTP Output Buffer OUTN SE1230 AGC Amp 2.5 Gb/s LOS Rectifier Integrator OUTP OUTN Rectifier/ Comparator Vref2 LOS_INIT Bandgap Ref Vref1 AGC_ADJ 49-DST-01 Rev 1.4 Apr 29/02 1 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final DNC DNC DNC AGC_ADJ VCC VCC 30 29 28 27 26 25 VCC VCC 32 31 Pin Out Diagram GND 1 GND 2 INP 3 GND 4 Top View 24 GND 23 GND 22 OUTP 21 GND 20 OUTN 14 15 16 VCC LOS_INIT GND GND VCC 13 17 12 8 VCC VCC VCC 11 VCC 18 LOS GND 7 10 19 9 6 GND GND GND INN 5 Pin Out Description Pin No. Name 1 GND Negative supply (0 V) 2 GND Negative supply (0 V) 3 INP Non-inverting input (50 Ω impedance) 4 GND Negative supply (0 V) 5 INN Inverting input (50 Ω impedance) 6 GND Negative supply (0 V) 7 VCC Positive supply (3.3 V) 8 VCC Positive supply (3.3 V) 9 GND Negative supply (0 V) 10 GND Negative supply (0 V) 11 LOS Loss of signal output (open collector) 12 VCC Positive supply (3.3 V) 13 VCC Positive supply (3.3 V) 14 LOS_INIT 49-DST-01 Rev 1.4 Description Sets initial state of LOS output Apr 29/02 2 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Pin No. Name 15 GND Negative supply (0 V) 16 GND Negative supply (0 V) 17 VCC Positive supply (3.3 V) 18 VCC Positive supply (3.3 V) 19 GND Negative supply (0 V) 20 OUTN 21 GND Negative supply (0 V) 22 OUTP Non-inverted output (50 Ω impedance) 23 GND Negative supply (0 V) 24 GND Negative supply (0 V) 25 VCC Positive supply (3.3 V) 26 VCC Positive supply (3.3 V) 27 AGC_ADJ AGC output level adjust 28 DNC Do not connect 29 DNC Do not connect 30 DNC Do not connect 31 VCC Positive supply (3.3 V) 32 VCC Positive supply (3.3 V) 49-DST-01 Rev 1.4 Description Inverted output (50 Ω impedance) Apr 29/02 3 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Functional Description Automatic Gain Control (AGC) The SE1230 is configured as a variable gain amplifier, with automatic gain control. It comprises a variablegain block driving a 50 Ω output driver (see the functional block diagram on page 1). The device requires a single +3.3 V power supply. A rectifier compares the output signal voltage with a reference level to invoke gain control. When operating in the controlled gain region, the fully integrated long time-constant integrator provides filtered control voltages to the variable gain stages to maintain a fixed output level. This output level may be varied by injecting current into AGC_ADJ (leave unconnected if adjustment is not required). System Inputs The inputs INP and INN are differential and are each internally terminated to 50 Ω. To avoid problems with offset or common-mode voltage, use AC-coupling for differential or single-ended connection (for the latter, AC-couple the unused input to ground via 50 Ω). The maximum input level is 200 mVpk, applied singleended or differentially. System Outputs The outputs OUTP and OUTN are differential and are each internally terminated to 50 Ω. To avoid problems with offset or common-mode voltage, use AC-coupling for differential or single-ended connection (for the latter, AC-couple the unused output to ground via 50 Ω). The default output level (under AGC) is 370 mVpk differential. Loss of Signal A two-level comparator block is used to detect the input signal level. If it drops below the lower threshold, LOS goes low. This output is an open collector to allow wired-OR connection to other system alarm signals; it requires an external pull-up resistor. It goes high only when the input level exceeds the upper comparator threshold level. If this function is not required, LOS may be left unconnected. By connecting an external series-RC to the LOS_INIT pin, LOS can be forced low on first power up if the signal level is between the upper and lower comparator thresholds. If this function is not required, leave LOS_INIT unconnected. System Block Diagram Receiver Module 2.5 GHz 2.5 Gb/s 2 2 Clock Clock & Data Recovery 2 SE1230Q Data AGC Amplifier 49-DST-01 Rev 1.4 Apr 29/02 2 SE1030/31 PIN TZ Amplifier 4 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Absolute Maximum Ratings These are stress ratings only. Exposure to stresses beyond these maximum ratings may cause permanent damage to, or affect the reliability of the device. Avoid operating the device outside the recommended operating conditions defined below. Symbol Parameter Min Max Unit VCC Supply Voltage –0.5 5.0 V VIO Voltage at any input or output –0.5 VCC+0.5 V IIO Current sourced into any input or output, except OUTP and OUTN –20 20 mA IIO Current sourced into pins OUTP and OUTN –40 40 mA VESD Electrostatic Discharge (100 pF, 1.5 kΩ), all pins –2 2 kV Tstg Storage Temperature –65 150 °C Recommended Operating Conditions Symbol Parameter Min Typ Max Unit 3.1 3.3 3.5 V 5 mA VCC Supply Voltage ILOS LOS Output Load Current RLOSI LOS_INIT Resistor 1 kΩ CLOSI LOS_INIT Capacitor (increase value for slow power supply rise time) 1 µF IAGC_ADJ AGC Threshold Adjust Input Current (on AGC_ADJ pin) – note 1 Ta Operating Ambient Temperature 0 150 µA –40 85 °C Note 1: This current can be produced by connecting a suitable resistor between VCC and AGC_ADJ. DC Electrical Characteristics Symbol Parameter Min Typ Max Unit ICC Supply current 70 100 mA PD Power Dissipation 230 350 mW VAGC_ADJ Open-circuit AGC_ADJ Voltage 0.37 VLOS Output Low Voltage on LOS, with ILOS = 1 mA RT Input/Output Termination Resistance 49-DST-01 Rev 1.4 Apr 29/02 V 0.4 50 V Ω 5 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final AC Electrical Characteristics Symbol Parameter Min BW (3dB) Small Signal Bandwidth at –3dB point 2.0 Gain Small Signal Gain (f = 100 MHz), differential input / output 21 Typ Input Signal Level at AGC Threshold 0 µA) – note 2 Unit GHz 23.5 Maximum Input Signal Level Vin Max 26 dB 200 (IAGC_ADJ = Lower LOS Threshold (LOS = low) 25 5 Upper LOS Threshold (LOS = high) mV pk (differential) 8 12 18 Output AGC Signal Level (IAGC_ADJ = 0 µA) – note 3 250 370 500 Vout Output AGC Signal Level (IAGC_ADJ = 150 µA) – note 3 80 170 300 (differential) S11 Input Reflection Coefficient (< 1.3 GHz) –10 dB S22 Output Reflection Coefficient (< 1.3 GHz) –10 dB NF Noise Figure (diff. in / diff. out) 12 dB t R / tF Output Rise / Fall Time (Input rise / fall time = 20 ps) 120 mV pk ps Note 2: Vin at AGC threshold is calculated by dividing Vout by the small signal gain. Note 3: Measured at Vin = 100 mV pk , f = 100 MHz. For intermediate values of IAGC_ADJ the output amplitude can be estimated by linear interpolation. DC and AC electrical characteristics are specified over the recommended operating conditions, and with load resistor (RL) of 50 Ω, AC coupled via 100 nF, for each output. All characteristics are specified for differential signals on inputs and outputs. 49-DST-01 Rev 1.4 Apr 29/02 6 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Package Information The device is packaged in a 5 mm, 32 pin plastic low profile quad flat pack (LQFP). Package Outline Package Dimensions Dimension Min (mm) Nom (mm) Lead Count 32 Lead Pitch (E) 0.5 Body Size (D1) 5.00 Component Tip-to-Tip (D) 7.00 Component Height (A) 49-DST-01 Max (mm) 1.60 Component Standoff 0.05 Body Thickness (A2) 1.35 1.40 1.45 Lead width (plated) (B) 0.17 0.22 0.27 Lead Thickness (plated) (C) 0.09 Rev 1.4 Apr 29/02 0.15 0.175 7 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final Applications Information For optimum performance it is recommended that the device be used in differential mode with the circuit shown in the diagram below. Components connected to LOS, LOS_INIT and AGC_ADJ are optional, depending on whether or not the loss of signal and/or AGC adjust functions are required. +3.3 V 10 kΩ LOS VCC 100 nF INP TZ Amp, 50 Ω outputs AGC Amp SE1230Q INN 100 nF AGC_ADJ IAGC_ADJ 0V 49-DST-01 Rev 1.4 Apr 29/02 To system alarm circuits 100 nF OUTP CDR, 50 Ω inputs OUTN GND LOS_INIT 100 nF RLOSI 1 kΩ CLOSI 1 µF 8 of 9 SE1230Q LightCharger™ 2.5 Gb/s Automatic Gain Control Amplifier Final http://www.sige.com Headquarters: Canada Phone: +1 613 820 9244 Fax: +1 613 820 4933 2680 Queensview Drive Ottawa ON K2B 8J9 Canada [email protected] San Diego United Kingdom Phone: +1 858 668 3541 Fax: +1 858 668 3546 South Building, Walden Court Parsonage Lane, Bishop’s Stortford Hertfordshire CM23 5DB Hong Kong Phone: +44 1279 464 200 Fax: +44 1279 464 201 Phone: +1 852 9177 1917 Product Preview The datasheet contains information from the product concept specification. SiGe Semiconductor Inc. reserves the right to change information at any time without notification. Preliminary Information The datasheet contains information from the design target specification. SiGe Semiconductor Inc. reserves the right to change information at any time without notification. Final The datasheet contains information from the final product specification. SiGe Semiconductor Inc. reserves the right to change information at any time without notification. Production testing may not include testing of all parameters. Information furnished is believed to be accurate and reliable and is provided on an “as is” basis. SiGe Semiconductor Inc. assumes no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any patent or other intellectual property rights of SiGe Semiconductor Inc. or third parties. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe Semiconductor Inc. products are NOT authorized for use in implantation or life support applications or systems without express written approval from SiGe Semiconductor Inc. TM TM TM TM RangerCharger , StreamCharger , PointCharger , and LightCharger are trademarks owned by SiGe Semiconductor Inc. Copyright 2002 SiGe Semiconductor All Rights Reserved 49-DST-01 Rev 1.4 Apr 29/02 9 of 9