HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Typical Applications Features The HMC914LP4E is ideal for: Supports Data Rates up to 12.5 Gbps •• SONET/SDH-Based Transmission Systems Differential Small Signal Gain: 32 dB •• OC-192 Fiber Optic Modules Programmable Loss-of-Signal Detection (LOS) •• 10 Gigabit Ethernet Automatic Output Disable Mode •• 8x and 10x Fiber Channel Adjustable Output Voltage Swing up to 750 mVp-p Differential •• Wideband RF Gain Block Integrated DC Offset Correction Received Signal Strength Indicator (RSSI) Output 24 Lead Plastic 4x4mm SMT Package: 16mm² General Description Functional Diagram HMC914LP4E is a limiting amplifier designed to support data transmission rates up to 12.5 Gbps. The amplifier can operate over a wide range of input voltage levels and provides constant-level differential output swing. HMC914LP4E features a loss of signal (LOS) indicator output where the input signal amplitude threshold level can be adjusted using the LOSTH pin. HMC914LP4E also features an output level control pin, VAC, which allows for loss compensation or for output signal level optimization. Differential output signal swing can be adjusted up to 750 mVp-p. An integrated DC offset compensation is also provided on chip. The HMC914LP4E provides an analog RSSI output voltage which is proportional to input signal amplitude. limiting amplifiers - smt 6 All single-ended input signals are terminated with 50 ohms to +3.3V on-chip, and may be either AC or DC coupled. The outputs of the HMC914LP4E may be operated either differentially or single-ended. The HMC914LP4E operates from a single +3.3V DC supply and is available in a plastic RoHS compliant 4x4 mm SMT package. Electrical Specifications, TA = +25° C, Vcc = +3.3V Parameter Conditions Power Supply Voltage, Vcc Supply Current, Icc Low Frequency Cut-off, f3dB-L 6-1 Max. Units 3.3 3.6 V 47 0.4 VAC = 1V Maximum Data Rate Small Signal Bandwidth, f3dB-H Typ. 3 VAC = 1V Output Amplitude Control Voltage, VAC Differential Small Signal Gain Min. mA 2.2 32 12.5 V dB Gbps 3-dB cutoff frequency 9.5 GHz 100 nF off chip cap is used 10 kHz For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Electrical Specifications (Continued) Parameter Min. Up to 12 GHz 12 Output return loss, S22 Up to 12 GHz 11 Input Sensitivity [1] Maximum Input Swing Adjustable Data Output Swing Range [2] Typ. Max. Units dB dB VAC = 1V 15 mVp-p VAC = 1V 1200 mVp-p diff VAC = 0.4V - 2.2V 240 750 mVp-p diff Output P1dB [2] @ 5 GHz, VAC = 1V -9.5 dBm Rise time, tr [3] VAC = 1V, %20 to %80 29 ps Fall time, tf [3] VAC = 1V, %80 to %20 29 ps Additive RMS jitter, Jd [4] Input referred voltage noise VAC = 1V 0.3 ps @ 5 GHz 3.8 nV/rtHz @ 8 GHz 3.6 nV/rtHz DISABLE Input HIGH Voltage, VIH 2 Vcc V DISABLE Input LOW Voltage, VIL 0 0.8 V AODWNENB Input HIGH Voltage, VIH 2 Vcc V AODWNENB Input LOW Voltage, VIL 0 0.8 V LOS assert threshold level [5] LOS Assert/Deassert Threshold Level LOS Hysteresis [5][6] [5] RTH = 80 kOhm between LOSTH and GND, Single-Ended 20 mV RTH = 8.5 kOhm between LOSTH and VCC, Single-Ended 380 mV assert, LOSTH internally set, single-ended 63 mV deassert, LOSTH internally set, single-ended 110 mV RTH between LOSTH and VCC 2 4.8 dB RTH between LOSTH and GND 5.8 12.2 dB LOSTH internally set 4.84 dB LOS Output HIGH Voltage 1.82 kOhm to VCC (RLOS) 3.3 V LOS Output LOW Voltage 1.82 kOhm to VCC (RLOS) 2.65 V 2.7 mV/V RSSI Sensitivity [1] Signal-ended input signal level for limited output [2] Single-ended output [3] Data Amplitude: Differential 200 mVp-p, Data Rate: 10 Gbps PRBS 223 -1 pattern [4] Data Amplitude: Differential 200 mVp-p, Data Rate: 10 Gbps 10101... pattern [5] See application notes for detailed information [6] LOS Hysteresis=20*Log(LOS deassert/LOS assert) For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6 limiting amplifiers - smt Conditions Input return loss, S11 6-2 HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Differential Gain & Return Loss vs. Frequency [1] [2] Differential Gain vs. Frequency & Temperature [1] [2] 50 40 30 40 30 10 GAIN (dB) RESPONSE (dB) 20 S21 S11 S22 0 -10 20 10 +25C +85C -40C -20 0 -30 -40 0 2 4 8 10 0 2 4 DIFFERENTIAL VOLTAGE (mVp-p) DC CURRENT (mA) 10 12 600 50 +25C +85C -40C 40 3 3.1 3.2 3.3 3.4 3.5 550 500 450 350 3.6 +25C +85C -40C 400 3 3.1 3.2 SUPPLY VOLTAGE Vcc (V) 3.3 3.4 3.5 3.6 SUPPLY VOLTAGE Vcc (V) DC Current vs. VAC [2] [3] Differential Output Swing vs. VAC [2] [3] 800 DIFFERENTIAL VOLTAGE (mVp-p) 70 DC CURRENT (mA) 8 Differential Output Swing vs. Supply Voltage [1] [3] [1] [3] 60 30 6 FREQUENCY (GHz) DC Current vs. Supply Voltage 60 50 +25C +85C -40C 40 30 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 CONTROL VOLTAGE VAC (V) [1] VAC = 1V 6-3 -10 12 FREQUENCY (GHz) 6 limiting amplifiers - smt 6 [2] VCC=3.3V 2 2.2 600 400 +25C +85C -40C 200 0 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 CONTROL VOLTAGE VAC (V) [3] Input Data: Differential 200 mVp-p 10 Gbps NRZ PRBS 223 -1 pattern For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Fall Time vs. VAC [1] [2] 50 50 40 40 30 +25C +85C -40C 20 10 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 30 +25C +85C -40C 20 2 10 0.4 2.2 0.6 0.8 CONTROL VOLTAGE VAC (V) 1.2 1.4 1.6 1.8 2 2.2 6 RMS Jitter vs. Single-Ended Input Voltage [1] [4] [5] RMS Jitter vs. VAC [1] [3] 0.5 4 0.4 +25C +85C -40C 3 RMS JITTER (ps) RMS JITTER (ps) 1 CONTROL VOLTAGE VAC (V) 0.3 0.2 +25C +85C -40C 0.1 0 0.4 0.6 0.8 1 1.2 1.4 2 1 1.6 1.8 2 0 2.2 1 10 100 SINGLE-ENDED Vin (mVp-p) CONTROL VOLTAGE VAC (V) Differential Output Swing vs. Single-Ended Input Voltage [1] [4] [5] 1000 RSSI Voltage vs. Single-Ended Input Voltage [1] [4] [5] 2.5 DIFFERENTIAL VOLTAGE (mVp-p) 1000 limiting amplifiers - smt FALL TIME (ps) RISE TIME (ps) Rise Time vs. VAC [1] [2] RSSI (V) 2 100 1 10 100 SINGLE-ENDED Vin (mVp-p) +25C +85C -40C 1.5 +25C +85C -40C 1000 1 0 100 200 300 400 SINGLE-ENDED Vin (mVp-p) 500 [1] VCC = 3.3V [2] Input Data: Differential 200 mVp-p 10 Gbps NRZ PRBS 223 -1 pattern [3] Input Data: Differential 200 mVp-p 10 Gbps 10101... pattern [4] VAC = 1V [5] Frequency = 5 GHz For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6-4 HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Absolute Maximum Ratings limiting amplifiers - smt 6 6-5 Power Supply Voltage (VCC) 3.8V to -0.5V Input Voltage (INP-INN) 1V to 3.3V Output Amplitude Control Voltage (VAC) 0 to 2.4V Power down input voltage (DISABLE) 0 to 3.6V Auto power down enable voltage (AOPDWNENB) 0 to 3.6V Loss of Signal threshold programming current (LOSTH) ±3 mA Channel Temperature 125 °C Continuous Pdiss (T = 85 °C) (derate 13.6 mW/°C above 85 °C ) 0.54 W Thermal Resistance (channel to package bottom) 73.5 °C/W Storage Temperature -55 to 125 °C Operating Temperature -40 to +85 °C 11.25 Gbps Differential Output Eye Diagram for 200 mVp-p Input Current Minimum Maximum 10 Gbps Differential Output Eye Diagram for 10 mVp-p Input Total Meas Current Minimum Maximum Total Meas Eye Amp 481 mV 481 mV 482 mV 83 Eye Amp 358 mV 358 mV 358 mV 81 Rise Time 30.00 ps 30.00 ps 31.33 ps 83 Rise Time 36.00 ps 36.00 ps 37.33 ps 81 Fall Time 28.67 ps 28.67 ps 29.33 ps 83 Fall Time 35.33 ps 34.67 ps 36.00 ps 81 p-p Jitter 9.333 ps 6.667 ps 9.333 ps 83 p-p Jitter 15.333 ps 12.000 ps 15.333 ps 81 Time Scale: 30 ps/div Amplitude Scale: 100 mV/div Time Scale: 30 ps/div Amplitude Scale: 90 mV/div Test Conditions: VCC = 3.3V, VAC = 1V Data Input: Differential 200 mVp-p 11.25 Gbps NRZ PRBS 223 -1 pattern Test Conditions: VCC = 3.3V, VAC = 1V Data Input: Differential 10 mVp-p 10 Gbps NRZ PRBS 223 -1 pattern For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Outline Drawing NOTES: 1.LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 3.LEAD SPACING TOLERANCE IS NON-CUMULATIVE 4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 7. REFER TO HMC APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN. Package Information Part Number Package Body Material Lead Finish HMC914LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL Rating MSL1 [2] Package Marking [1] H914 XXXX limiting amplifiers - smt 6 [1] 4-Digit lot number XXXX [2] Max peak reflow temperature of 260 °C For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6-6 HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Pin Descriptions limiting amplifiers - smt 6 6-7 Pin Number Function Description 1 LOS Loss of signal indicator. Open collector output. Requires an external resistor to VCC. This output sinks 500 uA DC current when input is lower than the threshold. 2, 5, 8, 9, 11, 12, 14, 17 Package Base GND Signal and supply ground. 3, 4 INP, INN Differential (INP-INN) or single-ended (INP) data inputs. 6 DISABLE Disables output buffer. Internally set to VCC. Data outputs are enabled when DISABLE is high or floating. 7 AODWNENB Enables the automatic output disable feature. If asserted, outputs automatically disable when the input signal is below than the programmed loss threshold. Active low. Internally set to VCC. Outputs enable when the input signal returns its desired swing level. 10 VAC Output Amplitude Control. Internally set for 500 mV differential p-p. 13 N/C The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally. Interface Schematic For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Pin Descriptions (Continued) Function Description 15, 16 QN, QP Differential data outputs 18, 21, 22 Vcc Power Supply (+3.3V) 19, 20 CN, CP Filter capacitor for offset correction. 100 nF should be connected between these pins. 23 RSSI Received Signal Strength Output. 24 LOSTH Loss of signal threshold setting input. User programmable with resistor to VCC or GND. Interface Schematic For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6 limiting amplifiers - smt Pin Number 6-8 HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Evaluation PCB limiting amplifiers - smt 6 6-9 List of Materials for Evaluation PCB 128915 [1] Item Description Item J1 - J3 4 Pin DC Connector U1 HMC914LP4E Limiting Amplifier J4 - J7 SMA Connector PCB [2] 128913 Evaluation PCB TP1 - TP5 DC Pin [1] Reference this number when ordering complete evaluation PCB C1 - C2 100 nF Capacitor, 0402 Pkg. [2] Circuit Board Material: Arlon 25FR or Rogers 4350 C3, C5, C6, C8, C10, C12 100 nF Capacitor, 0402 Pkg. C4, C7, C9, C11, C13 1 nF Capacitor, 0402 Pkg. C14 - C16 4.7 µF Capacitor, Tantalum R1 - R2 4.75 kOhm Resistor, 0402 Pkg. R3 - R4 0 Ohm Resistor, 0402 Pkg. R5 1.82K Ohm Resistor, 0402 Pkg. R6 390 Ohm Resistor, 0402 Pkg. D1 LED Q1 PNP Transistor Description The circuit board used in the application should use RF circuit design techniques. Signal lines should have 50 Ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board shown is available from Hittite upon request. For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Application Circuit limiting amplifiers - smt 6 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6 - 10 HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE Application Information Loss of Signal and Setting the Input Signal Threshold The HMC914LP4E features an input signal level monitoring over a broad range. En external resistor is used at LOSTH pin to program the input signal amplitude threshold for generating the LOS output indicator. When this pin is kept floating LOSTH level is set internally to single-ended 63 mVp-p. LOS is an open collector output suitable for wired-OR connection for parallel alarm signals; it requires an external pull-up resistor, RLOS. If the input signal level drops below the asserted threshold level then, LOS output DC voltage goes low. It goes high only when the input level exceeds the upper hysteresis threshold level. When LOSTH pin is floating then the de-assert level will be single-ended 110 mVp-p. If this function is not required, the LOS output can be left floating. LOS Assert/Deassert Voltage vs. Rth 5 SINGLE-ENDED Vin (mVp-p) LOS assert LOS deassert 300 200 100 0 6 - 11 LOS Hysteresis vs. Rth 400 SINGLE-ENDED Vin (mVp-p) limiting amplifiers - smt 6 If input threshold value is desired to be higher than 63 mVp-p then an external RTH resistor should be connected between LOSTH pin and VCC. Desired threshold value can be obtained by changing the value of the resistor RTH as shown in the figures below. 0 100 200 300 RESISTOR (kOhm) 400 500 4 3 2 1 0 Hysteresis = 20*log{LOS deassert/LOS assert} 0 100 200 300 RESISTOR (kOhm) 400 500 For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] HMC914LP4E v02.0311 12.5 Gbps LIMITING AMPLIFIER w/ LOSS OF SIGNAL FEATURE If input threshold value is desired to be lower than 63 mV down to 20 mVp-p then an external RTH resistor should be connected between LOSTH pin and GND. Desired threshold value can be obtained by changing the value of the resistor value as shown in the figures below. LOS Assert/Deassert Voltage vs. Rth LOS Hysteresis vs. Rth 15 100 SINGLE-ENDED Vin (mVp-p) SINGLE-ENDED Vin (mVp-p) 120 80 LOS assert LOS deassert 60 40 20 10 5 Hysteresis = 20*log{LOS deassert/LOS assert} 0 0 0 100 200 300 RESISTOR (kOhm) 400 500 0 100 200 300 RESISTOR (kOhm) 400 500 Automatic Output Disable The HMC914LP4E has two different disable features; one is manual and other is automatic. DISABLE pin provides manual control over the output. DISABLE pin is a CMOS input and active “low”. There is an integrated pull-up resistor to VCC at this input. If logic low is applied to this input, differential data outputs QP / QN are forced to VCC ensuring that no signal. If this input is left floating or logic high is applied then data outputs are enabled. Disable supply current when DISABLE=0 is 32mA. limiting amplifiers - smt 6 Automatic disable mode is activated by AODWNENB CMOS input. This input is active “low”. To activate the automatic output disable mode logic “0” should be applied. When it is activated and if the input signal is below than the programmed loss threshold, differential outputs automatically goes to VCC and disabled. Outputs start toggling for normal operation when the input signal returns to its desired swing level. Disable supply current when AODWNENB =0 is 40mA. For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or [email protected] 6 - 12