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| IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Description The IT3042D is a MMIC limiter amplifier for use in 40-Gb/s optical communications systems. Signals at levels as low as +/-25 mVpp differential can be amplified up to 1.0 Vpp differentially. The design allows an offset correction function, output voltage control, and output power monitoring. The inputs are AC and DC coupled and the output is DC coupled. Features Small-signal differential gain: 28 dB Differential output voltage: 1000 mVpp Input sensitivity: +/-25 mVpp at Vout = 500 mVpp Single bias supply: -3.3 VDC Power consumption: 400 mW DC offset control Output voltage control Power monitoring Jitter degradation (rms): 0.6 ps IT3042D in evaluation fixture www..com Absolute Maximum Ratings Symbol Vee Vd Vm Vof Vofb Vctrl Tstg Parameters/conditions Power supply voltage Applied voltage at data input (differential) Applied voltage at data input (single ended) Offset control voltage Offset control voltage Amplitude control voltage Storage temperature Min. -4 -3 -3 -7 -65 Max. 0 3 1.5 0 0 0 150 Units V V V V V V o C Recommended Operating Conditions Symbol VEE IEE Vof Vofb Vctrl IAC Vd Vm Vom Vomb Parameters/conditions Power supply voltage Total bias supply current Offset control voltage Offset control voltage Amplitude voltage control Voltage control current Applied peak-to-peak voltage at data input (diff.) Applied peak-to-peak voltage at data input (SE) Output DC monitor (+) Output DC monitor (-) Input interface Output interface Min. -3.4 95 -1.5 -1.5 -2 0 25 50 -0.1 -0.1 Typ. -3.3 120 0 0 4 -0.25 -0.25 AC/DC coupled DC coupled Max. -3.2 140 1.5 1.5 -1.2 5 500 1000 -0.4 -0.4 Units V mA V V V mA mVpp mVpp V V For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 1 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Electrical Characteristics At 25 C 50-ohm system VEE = -3.3 VDC Symbol P G Parameters/conditions Power consumption (500 mVpp single-ended output) Differential small-signal gain at 2 GHz Pin = -30 dBm 3 dB bandwidth Pin = -30 dBm Input return loss up to 50 GHz Output return loss up to 50 GHz Input signal Average DC output voltage Output peak-to-peak voltage (either Q or \Q) (Vin from +/-25 mVpp to +/-500 mVpp) Rise time (20% to 80%), single-ended output Fall time (20% to 80%), single-ended output Jitter rms (1) Min. 300 26 Typ. 400 28 Max. 460 Units mW dB B3dB Rlin Rlout Vin Voutdc Vout Tr Tf JRMS 28 12 5 +/-25 -0.15 500 11.5 9.5 0.6 12.5 10.5 1 www..com -0.25 +/-500 -0.35 GHz dB dB mVpp V mVpp ps ps ps (1) Jitter RMS measured as (JitterRMS_output2- JitterRMS_input2)1/2 S-Parameter Data 30 Differential gain VEE = -3.3 VDC Vctrl = -1.6 VDC S21 (dB) 25 20 15 10 5 0 -5 -10 -15 0 5 10 15 20 25 30 35 40 45 50 Frequency (GHz) Pin = -30 dBm (linear) Wafer probe tested 0 -5 S22 (dB) -10 -15 -20 -25 -30 0 5 10 Output return loss 15 20 25 30 35 40 45 50 Frequency (GHz) For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 2 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier S-Parameter Data (cont.) VEE = -3.3 VDC Vctrl = -1.6 VDC Pin = -30 dBm (linear) Wafer probe tested 0 -5 S11 (dB) -10 -15 -20 -25 -30 0 5 10 Input return loss www..com 15 20 25 30 35 40 45 50 Frequency (GHz) Output Voltage Single Ended (mVpp) Output Voltage Control At ambient temperature and 40-Gb/s Output voltage vs. Vctrl 580 530 480 430 380 330 280 230 -2 -1.8 -1.6 Vctrl (V) -1.4 -1.2 135 130 125 Iee (m A) 120 115 110 105 100 -2 -1.8 Iee vs. Vctrl -1.6 Vctrl (V) -1.4 -1.2 For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 3 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Eye Diagram Performance At ambient temperature All outputs shown are single-ended. Tested on a fixture www..com Input at 50 mVpp S.E. Bit rate: 40 Gb/s Jitter RMS= 0.74 ps Input = 50 mVpp SE., Output = 503 mV SE Bit rate: 40 Gb/s Jitter RMS degradation = 0.75 ps, Vctrl = -1.4 V Input at 100 mVpp SE Bit rate: 40 Gb/s Jitter RMS = 0.66 ps Input = 100 mVpp SE., Output = 502 mV SE Bit rate: 40 Gb/s Jitter RMS degradation = 0.58 ps, Vctrl = -1.58 V Input at 250 mVpp SE Bit rate: 40 Gb/s Jitter RMS= 0.66 ps Input = 250 mVpp SE, Output = 502 mV SE Bit rate: 40 Gb/s Jitter RMS degradation = 0.62 ps, Vctrl = -1.59 V For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 4 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Rise time vs. input voltage 12.5 12 11.5 Rise Time (ps) 11 10.5 10 9.5 9 50 100 150 200 Input voltage (single-ended), mVpp 250 Performance As Function of Input Voltage www..com Fall time vs. input voltage 12.5 12 11.5 Fall time (ps) 11 10.5 10 9.5 9 50 100 150 Input voltage (single-ended), mVpp 200 250 For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 5 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Performance As Function of Input Voltage (cont.) RMS jitter vs. input voltage 0.75 0.7 Jitter RMS (ps) 0.65 0.6 0.55 0.5 0.45 0.4 50 100 150 200 250 Input voltage (single-ended), mVpp www..com 12.5 12 SNR (dB) 11.5 11 10.5 10 9.5 9 50 100 SNR vs. input voltage 150 200 250 Input voltage (single-ended), mVpp For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 6 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Chip Layout, Front View and Bond Pad Locations Back of chip is connected to RF and DC ground. Pin 1 Pin 17 www..com 1.75 mm Pin 13 Pin 5 1.75 mm Pinouts Pin P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 Designation GND D Db GND Vofb Ve1l Ve2l NC Vee1l(1) NC Ve3l Vom Description Ground Data Input + Data Input Ground DC offset on Input Power Supply, -3.3 V Power Supply, -3.3 V No connection Power Supply -3.0V No connection Power Supply, -3.3 V DC monitor on output + Pin P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 Designation GND Qb Q GND Vomb Ve3u NC Vee1u(1) Vctrl Ve2u Ve1u Vof Description Ground Data Output Data Output + Ground DC monitor on output Power Supply, -3.3 V No Connection Power Supply, -3.0 V Amplitude Control Power Supply, -3.3 V Power Supply, -3.3 V DC offset on Input + 1. The -3.0 VDC supply can be achieved on Pin P9 and P20 by connecting a 10 ohm resistance in series with the -3.3 VDC supply and the two die pads. For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 7 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Recommended Assembly Diagram Vee Negative supply Vctrl Amplitude control Vomb Vof www..com (Input DC offset) P1 25milx25mil 560pF Q Qb D Db Vofb (Input DC offset) Vom 10 Ohm resistor Vee Negative Supply For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 8 IT3042D 40 Gb/s High-Sensitivity Limiting Amplifier Device Diagram Vof 50 1 k 560 pF 560 pF 50 1k Vom Q Qb D Db 50 1 k www..com Vofb Vee 560 pF 50 560 pF 1k Vomb Vac Application Information CAUTION: THIS IS AN ESD SENSITIVE DEVICE Chip carrier material should be selected to have InP compatible thermal coefficient of expansion and high thermal conductivity such as copper molybdenum or copper tungsten. The chip carrier should be machined, finished flat, plated with gold over nickel and should be capable of withstanding 325 C for 15 min. Die attachment for power devices should utilize Gold/Tin (80/20) eutectic alloy solder and should avoid hydrogen environment for HBT devices. Note that the backside of the chip is gold plated and it is connected to RF and DC ground. These InP devices should be handled with care and stored in dry nitrogen environment to prevent contamination of bonding surfaces. The devices should be handled with appropriate precaution including the use of wrist-grounding straps. All die attach and wire/ribbon bond equipment must be well grounded to prevent static discharges through the device. Recommended wire bonding: for signal input/output connections, use either 3 mil wide and 0.5 mil thick gold ribbon or a pair of 1mil diameter wires with lengths as short as practical allowing for appropriate stress relief (typically 400 +/- 100 m long). For all other connections, a single 1 mil dia wire of appropriate minimum length may be used. For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937, e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com. 9 |
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