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| IT3012 8 GHz, Differential-to-Single-Ended Amplifier Description The IT3012 is a packaged differential-to-single-ended amplifier designed for use as an optical modulator predriver with limiting functionality in 10.7 Gb/s and 12.5 Gb/s (OC-192) optical transmitters and receivers. It allows single-ended input signals of 350 mVpp to 900 mVpp or differential signals of 250 mVpp to 1800 mVpp to be limited at a constant single-ended output voltage of 1.9 Vpp. It provides output voltage control and allows external offset correction. IT3012 also provides excellent linear performance when operating at lower output voltages. Both AC and DC input coupling are allowed. DC-coupled SCFL differential input (input "high" voltage = 0 V, input "low" voltage = -900 mV) is allowed. www..com Features Limiting function with 1.9 Vpp single-ended output 3 dB bandwidth: 8 GHz Single-ended Gain: 17.5 dB Standard bias supply levels: -5 V or -5.2 V, +5 V Power consumption: 665 mW Low group delay and jitter Output voltage control AC and DC input coupling (SCFL compatible) AC and DC output coupling Low-cost JEDEC QFP-N (MO-220) package Absolute Maximum Ratings Sym bol Vee Vcc Vd Vm IDC IN Param eters/conditions Pow er supply voltage Pow er supply voltage Applied voltage at data input (differential) Applied voltage at data input (single ended) Min. -8 0 Max. 0 8 3 1.5 5 150 Units V V V V mA C C (+),(-) Offset control current Maximum channel temperature Storage temperature -65 Tch Tstg 150 Recommended Operating Conditions Symbol Tc Vee Vcc Vcb2 Iee Icc V DC Vm Vd Vindc R IN Parameters/conditions Operating temperature range (Tcase) Negative pow er supply voltage Positive pow er supply voltage First internal bias control voltage Negative supply current Positive supply current Offset control voltage Voltage control pin Applied peak-peak voltage at data input (single ended) Applied peak-peak voltage at data input (differential) DC input voltage (w ith DC-coupled input) Data bit rate Min. 0 -5.45 4.75 86 30 -5 -2.7 350 250 -0.5 Typ. -5 5 0 101 35 Max. 85 -4.75 5.25 116 40 5 0 900 1800 0 12.5 Units o C V V V mA mA V V mV mV V Gb/s Vctrl www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1192 Rev 9 1 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3012 8 GHz, Differential-to-Single-Ended Amplifier Electrical Characteristics At ambient temperature Vee=-5 V, Vcc=+5 V Symbol Parameters/Conditions P Z DCIn G B3dB RLin RLout Pow er consumption Input impedance at DCIn, /DCIn Single ended small signal gain 3 dB bandw idth Input return loss (up to10 GHz) Output return loss (up to 10 GHz) Output peak-peak voltage (single ended) (Vctrl =-2.7V for max. output voltage) Vout sensitiviy vs bias (Vee=-5 V +/-5%, Vcc=5 V +/-5%) DC output voltage (DC coupled to 50 ohm load) Output rise time (single ended) Output fall time (single ended) RMS jitter degradation (*) 200 300 28 20 1 Min. 565 900 16.5 7 15 8 1.75 Typ. 665 1000 17.5 8 20 10 1.9 Max. 765 1100 Units mW Ohm dB GHz dB dB V www..com Vout Vout Voutdc Trse Tfse JRMS +/-11 400 32 28 1.5 % mV psec psec psec (*) JRMS=sqrt((JRMS_dut)2-(JMRS_thru)2) S-Parameter Data Measured on connectorized evaluation board Vee=-5 V, Vcc=+5 V Gain (dB) 22 20 18 16 14 12 10 8 6 4 2 0 0 IT3012 Single Ended Linear Gain 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 0 2 IT3012 Input Return Loss S11 (dB) 2 4 6 8 Freq. (GHz) 10 12 14 16 4 6 8 10 Freq. (GHz) 12 14 16 IT3012 Output Return Loss 0 -2 -4 -6 S22 (dB) -10 -12 -14 -16 -18 -20 0 2 4 6 8 10 Freq. (GHz) 12 14 16 IT3012 Isolation 0 -10 -20 -30 S12 (dB) -40 -50 -60 -70 -80 -90 -100 0 2 4 6 8 10 Freq. (GHz) 12 14 16 -8 www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1192 Rev 9 2 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3012 8 GHz, Differential-to-Single-Ended Amplifier Eye Diagram Performance Vee=-5 V, Vcc=+5 V www..com Linear performance Bit rate: 10.7 Gb/s Vin=+/-75 mVpp, Vout=+/-1.1 Vpp Linear performance Bit Rate: 12.5 Gb/s Vin=+/-75 mVpp, Vout=+/-1.1 Vpp . Saturated performance Bit Rate: 10.7 Gb/s Vin=+/-400 mVpp, Vout=+/-1.9 Vpp Saturated performance Bit Rate: 12.5 Gb/s Vin=+/-400 mVpp, Vout=+/-1.9 Vpp Voltage Control Bit rate: 10.7 Gb/s Vtrl=-1.5 V, Vout=1.7 Vpp Bit rate: 10.7 Gb/s Vtrl=-1.1 V, Vout=1.0 Vpp www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1192 Rev 9 3 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3012 8 GHz, Differential-to-Single-Ended Amplifier System Diagram DCIn Din /Din 1k 50 1k Vctrl 50 Vcb2 Q www..com /DCIn Vee Vcc Vctrl Recommended Operational Setup DC blocking capacitors optional 1F DCIn Vcb2 Din Input /Din /DCIn IT3012 Q Vee Vcc -5.0 V 1F 560pF 560pF 1F +5 V Bias Conditions For Vee = -5 V Bias Condition * Apply +5.0 V at Vcc * Apply -5 V at Vee * Vcb2 = 0 V * Vctrl=-2.7 V or open for maximum output voltage * Vctrl from -2.7 V to -1 V for output voltage control For Vee = -5.2 V Bias Conditions * Apply +5 V at Vcc * Apply -5.2 V at Vee * Vcb2 = 0V * Vctrl = -1.8V for maximum output voltage * Vctrl from -1.8 V to -1 V for output voltage control www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1192 Rev 9 4 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3012 8 GHz, Differential-to-Single-Ended Amplifier Package Drawing, Pinouts www..com Pin Outs: P1: GND P2: Din (RF input) P3: /Din (/RF input) P4: GND P5: /DCin P6: Vee P7: N/C P8: N/C P9: GND P10: N/C P11: Q (RF out) P12: GND P13: Vcb2 P14: Vctrl (voltage control) P15: Vcc P16: DCin www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1192 Rev 9 5 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 |
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