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IT3015 10 GHz High-Voltage Differential Amplifier
Description
The IT3015 is a packaged differential 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 differential output voltage of 6.0 Vpp. It provides output voltage control and allows external offset correction. IT3015 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. Limiting function with 6 Vpp differential output 3 dB bandwidth: 10 GHz Differential gain: 27 dB Standard bias supply levels: -5.2 V, +4 V Power consumption: 1.43 W 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
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Features
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
At ambient temperature
Symbol
Tc Vee Vcc 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 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 3.8 162 102 -5 -2.7 350 250 -0.5
Typ.
-5 4 190 120
Max.
65 -4.75 4.2 219 138 5 0 900 1800 0 10.7
Units
oC
V V mA mA V V mV mV V Gb/s
Vctrl
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This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1194 Rev 9 1
iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938
IT3015 10 GHz High-Voltage Differential Amplifier
Electrical Characteristics
At ambient temperature Vee=-5 V, Vcc=+4 V
Symbol Parameters/conditions
P Z DCIn G B3dB RLin RLout Pow er consumption Input impedance at DCIn, /DCIn Differential small signal gain 3 dB bandw idth Input return loss (up to 10 GHz) Output return loss (up to 10 GHz) Output peak-peak voltage (differential) (Vctrl =-2.7V for max. output voltage) Vout sensitivity vs bias (Vee=-5 V +/-5%, Vcc=4 V +/-5%) DC output voltage (DC coupled to 50 ohm load) Output rise time (single ended) Output fall time (single ended) RMS jitter degradation (*) 550 650 29 25 1
Min.
1218 900 26 9 12 5 5.5
Typ.
1430 1000 27 10 20 12 6
Max.
1647 1100
Units
mW Ohm dB GHz dB dB V
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Vout Vout Voutdc Trse Tfse JRMS
+/-11 750 32 30 1.5
% mV ps ps ps
(*) JRMS=sqrt((JRMS_dut)2-(JMRS_thru)2)
S-Parameter Data
Measured on connectorized evaluation board)
S21 (dB)
30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10
IT3015 Single Ended Gain
0 -5 -10 -15
IT3015 Input Return Loss
S11 (dB)
0 2 4 6 8 10 12 14 16 18
Vee=-5 V, Vcc=+4 V
-20 -25 -30 -35 -40 -45 -50 0 2 4 6 8 10 12 14 16 18
Freq. (GHz)
Freq. (GHz)
IT3015 O utput Return Loss
0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 0 2 4 6 8 10 12 14 16 18 Freq. (GHz)
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0 2 4 6
IT3015 Isolation
S22 (dB)
S12 (dB)
8 10 Freq. (GHz)
12
14
16
18
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This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status. August 17, 2005 Doc. 1194 Rev 9 2
iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938
IT3015 10 GHz High-Voltage Differential Amplifier
Eye Diagram Performance
Vee=-5 V, Vcc=+ V
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Linear performance Bit rate: 5.0 Gb/s Vin=+/-75 mVpp, Vout=+/-1.5 mVpp
Linear performance Bit rate: 10.7 Gb/s Vin=+/-75 mVpp, Vout=+/-1.4 mVpp
Saturated performance Bit rate: 5.0 Gb/s Vin=+/-400 mVpp, Vout=+/-3.1 Vpp
Saturated performance Bit rate: 10.7 Gb/s Vin=+/-400 mVpp, Vout=+/-3.1 Vpp
Device Diagram Vctrl DCIn Din /Din
1k 1k 50
Q /Q
50
/DCIn Vee
Vcc
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. 1194 Rev 9 3
iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938
IT3015 10 GHz High-Voltage Differential Amplifier
Recommended Operational Setup
DC blocking capacitors optional DCIn Din Q
IT3015
Vctrl
Bias Conditions 1F * Apply +4.0 V at Vcc * Apply -5.2 V at Vee * Vctrl =-2.7 V or open for maximum output voltage * Vctrl from -2.7 V to -1 V for output voltage control
Input
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/Din
/DCIn
Output
/Q Vcc
Vee
-5.0 V
1F 560pF 560pF 1F
+4 V
Dimensions, Pinouts
Pinouts P1: GND P2: Din (RF input) P3: /Din (/RF input) P4: GND P5: /DC in P6: Vee P7: N/C P8: N/C P9: GND P10: /Q (/RF out) P11: Q (RF out) P12: GND P13: NC P14: Vctrl (voltage control) P15: Vcc P16: DCin
Unless otherwise specified, dimensions are in inches (mm), and tolerance on dimensions is: +/- 0.0039 [0.100]
This is a Production data sheet. See "Product Status Definitions" on Web site or catalog for product development status.
August 17, 2005 Doc. 1194 Rev 9 4 iTerra Communications 2400 Geng Road, Ste. 100, Palo Alto, CA 94303 Phone (650) 424-1937, Fax (650) 424-1938
www.iterrac.com

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