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Part: MAX3910U/D
Category:
Communication
-> Fiber Optics
Description: MAX3910 10.7Gbps Linear Transimpedance Amplifier With Output Offset Adjust
Company: Maxim Integrated Products
Datasheet: Download MAX3910U/D datasheet File size : 479 kB
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Datasheet text preview:
19-2434; Rev 1; 1/03
10.7Gbps Linear Transimpedance Amplifier with Output Offset Adjust
General Description
The MAX3910 is a 10.7Gbps transimpedance amplifier d e s i g n e d for SONET OC-192/SDH STM-64, DWDM, a n d 10Gbps systems employing optical amplifiers. Operating from a single +5V or -5.2V supply, it converts a photodiode current into a measurable differential voltage. This product has a linear gain for an input current up to 950µAP-P and a soft-limiting feature that provides an increasing output swing for an input current up to the 3.5mAP-P overload. An offset adjust circuit and output-level monitors allow system threshold adjustments. Additional features include back-terminated 50 outputs and an integrated 200 filter resistor to bias the photodiode. The MAX3910 has a small-signal bandwidth of 9.1GHz and a small-signal transimpedance of 1.65k. The part achieves an input sensitivity of 15.5µAP-P for a BER of 10-12, translating to an optical sensitivity of -19.3dBm for a PIN (r = 0.9, re = 6.6) photo detector and -28.8dBm for an APD (M = 8, = 0.9, re = 10) photo detector. The MAX3910 is fabricated in Maxim's in-house SiGe process and is available in die form. o 950µAP-P Linear Range o 15.5µAP-P Sensitivity o 3.5mAP-P Overload o 1.65k Transimpedance o 9.1GHz Bandwidth o 110mA Supply Current o Output Offset Adjustment o Soft-Limiting Beyond Linear Input Range o Single +5V or -5.2V Power Supply o ESD Protection
Features
MAX3910
Ordering Information
PART MAX3910U/D TEMP RANGE 0°C to +85°C PIN-PACKAGE Dice*
Applications
DWDM Systems OC-192/STM-64 Transmission Systems 10Gbps Systems Using Optical Amplifiers 10Gbps Optical Receivers
*Dice are designed to operate over a 0°C to +100°C junction temperature (TJ) range, but are tested and guaranteed at TA = +25°C.
Typical Operating Circuit
VEE VCC
RFILT FILT
MON+
MON-
OUT+ PIN IN LIMITING AMPLIFIER MONIN
OUT -
MAX3910
CHF OSADJ
VEE
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
10.7Gbps Linear Transimpedance Amplifier with Output Offset Adjust MAX3910
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (VCC - VEE) ......-0.5V to +6.0V Continuous Input Current (IN)...........4.2mA Continuous Input Current (FILT) .......9.8mA Continuous Output Current (OUT+, OUT-) .......35mA Voltage at CHF, FILT, MON+, MON-, MONIN, OSADJ ........(VEE - 0.5V) to the lesser of +6.0V and (VCC + 0.5V) Storage Ambient Temperature Range (TSTG) ...-55°C to +150°C Die Attach Temperature ........+400°C Operating Temperature Range (Junction Temperature Range)....-20°C to +120°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC - VEE = 4.75V to 5.5V, TJ = 0°C to +100°C. Typical values are at VEE = -5.2V, VCC = GND, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER Supply Current Supply Current Power-Supply Noise Rejection Input Bias Voltage IIN 450µAP-P IIN = 1.0mAP-P IIN = 2.0mAP-P (Note 5) CHF open, IIN 450µAP-P CHF = 0.1µF, IIN 450µAP-P RFILT To OUT+ or OUTTo VCC V OD V OS (Note 6) Outputs DC-coupled to 50 to VCC (Note 6) IIN = 7.5µA DC IIN = 1.4mA DC V OSADJ 42 1.45 -1.3 -7 -10 15 -2.1 -1.375 VOSADJ = -0.4V, RL = 50 to VCC -1.25 -320 20 -0.4 -1.125 -250 165 1.40 SYMBOL IEE IEE PSNR CONDITIONS VEE2 open, Figure 1 (Note 3) VEE2 connected to negative supply, Figure 1 (Note 3) IIN 450µAP-P, f 1MHz IIN 450µAP-P, f 10MHz (Note 4) MIN TY P 95 110 23 22 V EE + 0.95 ZF ILIN 1.65 1.37 0.84 950 6 0.5 200 10 50 1.75 59 1.90 0 +7 +10 240 25 V EE + 1.1 1.87 k µAP-P kHz k V P-P V mV k V V mV MAX 138 158 UNITS mA mA dB V
Transimpedance (Note 5) Linear Input Current Range Low-Frequency Cutoff Photodiode Filter Resistor Output Monitor Resistance Single-Ended Output Resistance Maximum Differential Output Swing Single-Ended Output Range Output DC Offset OSADJ Input Resistance OSADJ Input Range OSADJ Voltage for Zero Offset Minimum Differential Output Offset
450
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10.7Gbps Linear Transimpedance Amplifier with Output Offset Adjust
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC - VEE = 4.75V to 5.5V, TJ = 0°C to +100°C. Typical values are at VEE = -5.2V, VCC = GND, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER Maximum Output Offset OSADJ Voltage Control Factor: OUT+ OSADJ Voltage Control Factor: OUTSYMBOL CONDITIONS VOSADJ = -2.1V, RL = 50 to VCC (VOSADJ)/VOUT+ (VOSADJ)/VOUTMIN 250 -3 TY P 320 -2 2 3 MAX UNITS mV V/V V /V
MAX3910
AC ELECTRICAL CHARACTERISTICS
(VCC - VEE = 4.75V to 5.5V, TJ = 0°C to +100°C. Typical values are at VEE = -5.2V, VCC = GND, TA = +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER Bandwidth Input-Referred Noise Input Sensitivity Input Overload Gain Flatness Gain Ripple Deterministic Jitter (Notes 2, 10) Single-Ended Output Return Loss (Note 2) I OL SYMBOL B W 3dB IN (Notes 2, 7) (Notes 2, 8) AC component (Note 9) DC component (Note 9) 100MHz - 4GHz, IIN 450µAP-P (Note 2) 4GHz - BW3dB, IIN 450µAP-P (Note 2) IIN 450µAP-P 450µAP-P IIN 2.5mAP-P 7.5GHz 2.5 1.4 CONDITIONS IIN 450µAP-P (Notes 2, 11) MIN 8.2 TY P 9.1 1.1 15.5 3.5 1.8 ±0.75 1.5 6.2 7.5 10 10.7 14.6 1.62 MAX UNITS GHz µ A RMS µ A P-P mAP-P mA dB dB psP-P dB
Default test conditions: VEE2 and CHF = open (Figure 1), RL = 50 to VCC, DC-coupled at each output, unless otherwise noted. AC characteristics are guaranteed by design and characterization. Note 2: Source capacitance = 0.25pF, source series resistance = 20, and source series inductance = 0.6nH. Output series inductance = 0.5nH at each of the differential outputs. Note 3: Supply current increases as average signal level increases. Maximum supply current is specified for IIN = 1.4mA average current. Typical supply current is specified for IIN 225µA average current. Note 4: PSNR is measured by detecting the differential output voltage VOUT while applying VEE = 55mVP-P signal on VEE1. PSNR = 20log(VEE/VOUT). Output offset adjust feature disabled. Note 5: Transimpedance is defined as VOUT(P-P) / IIN(P-P) at 10MHz. Linear range is defined as the input signal level where the transimpedance deviates from the small-signal transimpedance value by no more than 10% (Figure 2). Note 6: Input current 2.5mAP-P and 1.4mA DC. Note 7: Measured with a 4th-order Bessel-Thompson filter with a cutoff frequency of 8GHz. Note 8: Input sensitivity calculated from S/N 14.1 (BER 10-12). Note 9: For input signal less than or equal to the input overload, deterministic jitter is guaranteed to be within specifications. Note 10: Deterministic jitter is characterized with 27 - 1 PRBS + 80 zeros + 80 ones at 10.7Gbps. Note 11: Bandwidth is measured in an electrical environment and corrected to match the conditions of Note 2. Note 1:
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