PSS-AD500资料

5700 Corsa Avenue, #105 • Westlake Village, CA 91362 Tel: (818) 706-3400 • Fax (818) 889-7053 Email: sales@ •
DATA SHEET
1000
PSS-AD500-1.3G-TO5
0.7 0.6 0.5 0.4 A/W 0.3 0.2 0.1
100 GAIN 10 1 130
135
140
145 150 155 APPLIED VOLTAGE
160
165
170
0.0 200
3004Βιβλιοθήκη 0500 600 700 800 WAVELENGTH, nm
PARAMETER
SUPPLY VOLTAGE SUPPLY CURRENT TRANSIMPEDANCE OUTPUT IMPEDANCE MAXIMUM DIFFERENTIAL OUTPUT VOLTAGE AC INPUT OVERLOAD DC INPUT OVERLOAD INPUT REFERRED RMS NOISE INPUT REFERRED NOISE DENSITY SMALL SIGNAL BANDWIDTH LOW FREQUENCY CUTOFF TRANSIMPEDANCE LINEAR RANGE POWER SUPPLY REJECTION RATIO (PSRR) TO-5 PACKAGE NOTE 2
FIG. 2: APD SPECTRAL RESPONSE (NO AVALANCHE EFFECT)
0
10
20
30
40
50 60 UR, V
70
80
90
100
FIG. 3: AMPLIFIER OUTPUT VS TEMPERATURE
150 125 OUTPUT VOLTAGE, mV p-p 100 75 50 25 0 TRANSIMPEDANCE, db 0 25 50 75 100 125 150 INPUT CURRENT, µA 175 200
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5700 Corsa Avenue, #105 • Westlake Village, CA 91362 Tel: (818) 706-3400 • Fax (818) 889-7053 Email: sales@ •
DATA SHEET
ACTIVE AREA mm2 VBR TC of VBR(%/°C) 0.4 CT
PSS-AD500-1.3G-TO5
TYPICAL VALUES AT 22°C
Id RESP @ 780 nm A/W 0.45 TR CUT OFF FREQUENCY GHz (–3 db) 1.3 NEP (W/Hz1/2) 2 x 10–14
TRANSIMPEDANCE AMPLIFIER DATA
(VCC = +3.0V to + 5.5V, TA = 0°C to 70°C, 100Ω load between OUT+ and OUT–. Typical values are at TA = +25°C, VCC = 3.3V).
DATA SHEET
PSS-AD500-1.3G-TO5
HIGH SPEED OPTICAL DATA RECEIVER
TRANSFER CHARACTERISTICS The circuit used is an avalanche photodiode directly coupled to a high speed data handling transimpedance amplifier. The output of the APD (light generated current) is applied to the input of the amplifier. The amplifier output is in the form of a differential voltage pulsed signal. The APD responsivity curve is provided in Fig. 2. The term Amps/Watt involves the area of the APD and can be expressed as Amps/mm2/Watts/mm2, where the numerator applies to the current generated divided by the area of the detector, the denominator refers to the power of the radiant energy present per unit area. As an example assume a radiant input of 1 microwatt at 850 nm. The APD’s corresponding responsivity is 0.4 A/W. If energy in = 1 µW, then the current from the APD = (0.4 A/W) x (1 x 10–6 W) = 0.4 µA. We can then factor in the typical gain of the APD of 100, making the input current to the amplifier 40 µA. From Fig. 5 we can see the amplifier output will be approximately 40 mV p-p. APPLICATIONS NOTE The PSS-AD500-1.3G-TO5 is a high speed optical data receiver. It incorporates an internal transimpedance amplifier with an avalanche photodiode. This detector requires +3.5V to +5.0V voltage supply for the amplifier and a high voltage supply (100180V) for the APD. The internal APD follows the gain curve published for the PSS-AD500-TO52i avalanche photodiode. The transimpedance amplifier provides differential output signals in the range of 200 millivolts differential. In order to achieve highest gain, the avalanche photodiode needs a positive bias voltage (Fig. 1). However, a current limiting resistor must be placed in series with the photodiode bias voltage to limit the current into the transimpedance amplifier. Failure to limit this current may result in permanent failure of the device. The suggested initial value for this limiting resistor is 390 k OHM. When using this receiver, good high frequency placement and routing techniques should be followed in order to achieve maximum frequency response. This includes the use of bypass capacitors, short leads and careful attention to impedance matching. The large gain bandwidth values of this device also demand that good shielding practices be used to avoid parasitic oscillations and reduce output noise. Caution: These parts are extremely static sensitive. Standard ESD precautions must be followed.
+5V 2 OUT+ 1 OUT– 4 C2 GND 5 +VBIAS 3 APD
C1
SCHEMATIC DIAGRAM
2.0 (.08) φ0.46 (.018) φ8.3 (.327) (φ6.6 (.26)
φ5.08 (.20) 2 3
1
4 5
φ9.2 (.36)
DIMENSIONS: mm (Inches )
2100 48 220 2 1
2750 50 380
SOURCE CAPACITANCE = 0.85 pF NOTE 1 –3 dB, INPUT < 20 µADC PEAK TO PEAK 0.95 < LINEARITY < 1.05 OUTPUT REFERRED, f < 2 MHz PSSR = –20 LOG (∆VOUT/∆VCC)
CONDITIONS
MIN TYP MAX UNITS
3 5 34 6 63 3400 52 575 V mA Ω Ω mV p-p mA p-p mA 490 11 1525 2000 30 40 50 668 nA pA/(Hz)1/2 MHz kHz µA p-p dB
DIFFERENTIAL, MEASURED W. 40µA P-P SIGNAL SINGLE ENDED PER SIDE INPUT = 2mA p-p w/100 Ohm differential termination
900
1000 1100
FIG. 1: APD GAIN VS BIAS VOLTAGE
400 380 360 AMPLITUDE, mV 340 320 CJ, pF 0 20 40 60 AMBIENT TEMPERATURE, °C 80 300 280 260 240 220 200 5 0 40 35 30 25 20 15 10
FIG. 4: APD CAPACITANCE VS VOLTAGE
75
70
65
60
55 50 1M
10M
100M FREQUENCY, Hz
1G
10G
FIG. 5: AMPLIFIER TRANSFER FUNCTION
FIG. 6: TOTAL FREQUENCY RESPONSE
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AVALANCHE PHOTODIODE DATA
MODEL PSS-AD500
Dia.
V 160
pF 2.5
nA 0.5
GAIN 200
ps 280
500 µm 0.196
Symbols: VBR CT Id Resp. TR NEP
-
Breakdown Voltage Capacitance Dark Current Responsivity (no avalanche effect) Rise Time Noise Equivalent Power
Note 1: Source capacitance for PSS-AD500-1.3G-TO5 is the capacitance of APD. Note 2: Input Referred Noise is calculated as RMS Output Noise/ (Gain at f = 10 Mhz) Noise Density is (Input Referred Noise)/√bandwidth
4.20 (.165) 7.6 (.30) MIN ACTIVE AREA 500 µm DIA.
OUTLINE DIMENSIONS
APD CHIP
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5700 Corsa Avenue, #105 • Westlake Village, CA 91362 Tel: (818) 706-3400 • Fax (818) 889-7053 Email: sales@ •
DATA SHEET
PSS-AD500-1.3G-TO5
OPTICAL DATA RECEIVER USING AN AVALANCHE PHOTODIODE AND A 1.3 GHz AMPLIFIER
PSS-AD500-1.3G-TO5 is a high frequency optical data receiver comprising an Avalanche Silicon Photodiode and a transimpedance amplifier in a hermetically sealed TO-5 package.