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IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Description The IT3021 is a limiting amplifier for use as a post amplifier in optical receivers. Signals as small as +/-7 mVpp differential can be amplified to 1.28 Vpp differential. Offset correction and output voltage control are provided. Both AC and DC coupling are allowed at the input and output. The high sensitivity allows the device to be used at the output of a transimpedance amplifier. Features www..com 3-dB bandwidth: 2.5 GHz Differential gain: 42 dB Saturated output: 640 mVpp on each output into 50 ohms Single bias supply: -5.2 V Power consumption: 494 mW Bias current: 95 mA DC offset correction Amplitude voltage control Low RMS jitter Low-cost JEDEC QFP-N (MO-220) package Absolute Maximum Ratings S ymbol Vee1,2 Vd Vm T ch T stg Parameters/conditions Power supply voltage Applied voltage at data input (differential) Applied voltage at data input (single ended) Maximum channel temperature Storage temperature Min. -8 Max. 0 3 1.5 5 150 Units V V V mA o Ioffset(+),(-) Offset control current -65 C 150 C Recommended Operating Conditions Symbol Tc Vee1 Vee2 Iee1+Iee2 Voffset (+) Voffset (-) Vctrl Vd Vm Vindc Parameters/conditions Operating temperature range (T case) Power supply voltage Power supply voltage T otal bias supply current Offset control voltage Offset control voltage Amplitude voltage control Applied peak to peak voltage at data input (differential) Applied peak to peak voltage at data input (single ended) Input/output interface DC input voltage (with DC-coupled input) Min. 0 -5.45 -5.45 80 -5 -5 -5.2 7 14 Typ. -5.2 -5.2 95 Max. 85 -4.95 -4.95 110 5 5 0 1000 1000 Units o C V V mA V V V mV mV V AC and DC coupled -0.5 0.5 www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 1 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Electrical Characteristics At ambient temperature Vee1,2 = -5.2 V Symbol P G B3dB RLin RLout Vin Parameters/conditions Pow er consumption Differential small signal gain 3 dB bandw idth Input return loss (up to 5 GHz) Output return loss (up to 5 GHz) Input sensitivity diff. input (BER<1E-12, 223-1PRBS, 2.5Gb/s) Output peak to peak voltage (either Q or /Q) (Vctrl=0V for max. output voltage) Vout sensitivity vs. bias (Vee=-5.2 V +/-5%) Output DC voltage (DC coupled to 50 ohm load) Rise time (20% - 80%) Fall time (20% - 80%) Jitter peak to peak -450 -350 45 45 9 590 Min. 416 41 2.3 15 15 Typ. 494 42 2.5 20 20 4 640 +/-11 -250 60 60 14 Max. 572 Units mW dB GHz dB dB mVpp mVpp % mV ps ps ps www..com Vout Vout Voutdc Trse Tfse Jpp S-Parameter Data (Measured on connectorized evaluation board) IT3021 Single Ended Gain 50.0 45.0 40.0 35.0 IT3021 Input Return Loss 0.0 -5.0 -10.0 -15.0 Vee1 = Vee2 = -5.2 V Iee1+Iee2 = 95 mA S21 (dB) 25.0 20.0 15.0 10.0 5.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 S 11 (d B ) 30.0 -20.0 -25.0 -30.0 -35.0 -40.0 -45.0 -50.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Freq. (GHz) Freq. (GHz) IT3021 Output Return Loss 0.0 -5.0 -10.0 -15.0 IT3021 Isolation 0.0 -10.0 -20.0 -30.0 S22 (dB) -25.0 -30.0 -35.0 -40.0 -45.0 -50.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 S22 (dB) -20.0 -40.0 -50.0 -60.0 -70.0 -80.0 -90.0 -100.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Freq. (GHz) Freq. (GHz) www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 2 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Eye Diagram Performance Vee1 = Vee2 =-5.2 V Iee1+Iee2 = 95 mA www..com Bit rate: 2.5 Gb/s Vin =+/-6 mVpp, Vout = +/-570 mVpp Bit rate: 2.5 Gb/s Vin =+/-10 mVpp, Vout = +/-670 mVpp Bit rate: 2.5 Gb/s Vin =+/-50 mVpp, Vout = +/-672 mVpp Bit rate: 2.5 Gb/s Vin =+/-100 mVpp, Vout = +/-672 mVpp Bit rate: 2.5 Gb/s Vin =+/-200 mVpp, Vout = +/-672 mVpp Input sensitivity = +/-3 mVpp differential input, 2.5 Gb/s Output voltage = 333 mVpp single-ended iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 3 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Performance As Function of Input Voltage Output Voltage (+/-mV) Input/Output Characteristic 700 Output Voltage (+/-mV) 700 650 600 550 500 450 400 350 300 1 Input/Output Characteristic 650 600 550 500 450 400 350 300 0 2 4 6 8 10 12 14 16 18 20 Input (+/-mV) www..com 10 100 Input (+/-mV) 1000 Input/Output DC Characteristics 0 -100 Peak to Peak Jitter vs Input Voltage @ 2.5Gb/s 40 35 30 Jitter (pp-psec) -280 -240 -200 -160 -120 -80 -40 0 40 80 120 160 200 240 280 DC Output (mV) -200 -300 -400 -500 -600 -700 -800 25 20 15 10 5 0 1 10 100 1000 DC Input Offset (*) (mV) Input Amplitude (mVpp) Rise Time vs Input Voltage @ 2.5Gb/s 120 100 Rise Time (ps) Fall Time (ps) Fall Time vs Input Voltage @ 2.5Gb/s 120 100 80 60 40 20 0 80 60 40 20 0 1 10 100 1000 Imput Amplitude (+/-mVpp) 1 10 100 1000 Imput Amplitude (+/-mVpp) (*) Input applied to the offset control pin (Voffset1) and open output. www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 4 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Output Voltage Control 700 600 Eye Amplitude (mV) Eye Amplitude vs Vctrl 100 95 90 Power Supply Current Current (mA) -5 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 500 400 300 200 100 0 -100 -5.5 85 80 75 70 65 60 -6 -5 -4 -3 -2 -1 0 www..com Control Voltage Vtrl (Volts) Control Voltage (Volts) Bit rate: 2.5 Gb/s, Vctrl =-1.7 V Vin =+/-200 mVpp, Vou t =+/-355 mVpp Bit rate: 2.5 Gb/s, Vctrl =-2.7 V Vin =+/-200 mVpp, Vout =+/-167mVpp www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 5 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Recommended Operational Setup Apply -5.2 V at Vee1 and Vee2 Apply 0 V at Vctrl for maximum output Vctrl 560pF 560pF 0.1F 1F www..com DC blocking capacitors optional Voffset (+) 0.1F VL1 Din VL2 Q RF input /Din IT3021 /Q RF output Voffset (-) 0.1F Vee1 Vc b Vee2 Vee= -5.2 V 560pF 0.1F Vee= -5.2V 0.1F 560pF 0.1F www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 6 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 IT3021 2.5 Gb/s High-Sensitivity Limiter Amplifier Package Drawings, Pinouts www..com Pinouts: P1: GND P2: Din (RF input) P3: /Din (/RF input) P4: GND P5: Voffset (-) P6: Vee1 P7: Vcb P8: Vee2 P9: GND P10: /Q (/RF Out) P11: Q (RF Out) P12: GND P13: VL1 P14: Vctrl (voltage control) P15: VL2 P16: Voffset (+) www.iterrac.com This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. February 23, 2006 Doc. 4041 Rev 1 7 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938 |
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