Imaging Telecom Multiplexed InGaAs PIN Photodiode Array MXA-256-1, 2 (800-1700 nm) Multiplexed InGaAs PIN Photodiode Array Description The MXA-256-X detector is a hybrid focal plane Indium Gallium Arsenide PIN photodiode array with wavelength response ranging from 800 nm to 1700 nm. The array has 256 elements configured in a linear orientation with standard pixel height of 0.5 mm. A buffered multiplexer provides individual CMOS amplifiers for each photodiode. The integrating amplifier maintains zero volt bias across each InGaAs photodiode, minimizing dark current and low frequency noise allowing for longer exposure times with increased sensitivity. A static shift register scanning circuit sequentially selects sample-and-hold integrator output voltages which are proportional to input optical power. On-chip correlated double sampling (samples are taken at the beginning and end of integration, and are available at the output) removes integrator offsets and further suppresses low frequency noise. The array is available in a 28 pin dual-in-line package. Included in the assembly are a thermoelectric cooler (∆T max > 60° C), silicon multiplexer and bypass capacitors. The MXA-256 series is available in two classes, the MXA-256-1 and the MXA256-2. MXA-256-1 units exhibit no pixel drop-outs, while the MXA-256-2 devices exhibit five or fewer drop-outs (excluding the first and last pixels) that occur non-consecutively. Applications • • • • • • Fiber optics DWDM power monitoring NIR spectroscopy NIR imaging NIR astronomy Far-field analysis Features • 256 multiplexed elements • High resolution (50 µm pitch) • Variable Exposure Time: 10 micro sec. to 10 sec. • Wide dynamic range (>39 dB) • Correlated double sampling • 800 - 1700 nm frequency response • User selectable integration time www.perkinelmer.com/opto D A T A S H E E T Lighting MXA-256-1, 2 PARAMETER CONDITIONS MXA-256-X Number of Elements 256 Pixel Height 0.5 mm Pixel Pitch 50 µm Package 28 pin with TE cooler Dark Current ±5 pA Typical @ 1550 nm Cint = 15pF Response 65 mV/pJ (0.97 A/W onto 15 pF) Minimum @ 1550 nm Cint = 15pF 60 mV/pJ 800 to 1700 nm Wavelength Response @ 1550 nm Response Uniformity ±10% Grade 1 = none, Grade 2 = maximum 5 No two consecutive, excluding first and last Pixel dropouts Noise Equivalent Charge 1.8 fC Full Well Capacity 435 M e- (4V onto 17.4 pF) Read Noise 100 KHz readout 23500 e- (250 µV onto 15 pF) NEP @ 25° C t=1 msec 0.15 pW/√ Hz t=100 msec 0.025 pW/√ Hz *Optical Dynamic Range @ 25° C Typical for t ≤ 10 msec 40 dB(>13 bits) Dark Voltage Rate @ 25° C, t=10 ms Typical pixel 0.2 V/sec Maximum pixel 2.0 V/sec Typical pixel 0.1 V/sec Maximum pixel 1.0 V/sec Dark Voltage Rate @ 5° C, t=10 ms 10 KHz to 1 MHz Pixel readout rate TE cooler (One stage) Hot side temperature ∆T max = 64° C @ 1.8A, 8V 27° C ∆T = 45° C @ 0.85A, 5V (Nominal) -40° C to 70° C Storage Temperature Case Operating Temperature range No cooler 0 to 40° C With cooling -5° C to 70° C *Optical dynamic range defined as: 10 log (Vmax - V dark)/V noise Vmax = 3.0 V @ V ref = 3.0 volts 01-001:121201/2 www.perkinelmer.com/opto www.perkinelmer.com/opto MXA-256-1, 2 Dark Voltage Rate 01-001:121201/3 www.perkinelmer.com/opto MXA-256-1, 2 Standard Deviation Noise 01-001:121201/4 www.perkinelmer.com/opto MXA-256-1, 2 Optical Dynamic Range 01-001:121201/5 www.perkinelmer.com/opto MXA-256-1, 2 MXA-256 Basic Dimensions Units: mm DWG # SK-03491 Rev. 0 01-001:121201/6 www.perkinelmer.com/opto MXA-256-1, 2 Timing Diagrams Readout: There are only two control signals required to operate the array, clock (Even and Odd) and Int/Reset. The clock is applied continuously to operate the array. During the high state of Int/Reset, the signal is integrated. The signals are read out during the low state of Int/Reset. The first sample (Video 1) is taken at the beginning of an integration. During Reset at the low state of Int/Reset and immediately prior to integration, the pixels are held at reset so that Video 1 captures the “zero” level. The second sample (actual signal) is taken at the end of the integration and is available at pin Video 2. The Video 1 and Video 2 are differentially amplified for correlated double sampling (CDS). CDS removes integrator offsets and further suppresses low frequency noise. The first pixel of Odd Video appears at the third rising edge of the clock after the falling edge of Int/Reset. The first pixel of Even Video will appear at the fourth falling edge of the clock after the falling edge of Int/Reset. 01-001:121201/7 www.perkinelmer.com/opto MXA-256-1, 2 Timing Diagrams End of Signal: The End of Signal (EOS) is a timing marker that indicates the end of the readout cycle. This occurs immediately after the end of readout. The EOS pulse is half the clock width and swings from VSS to VDD. 01-001:121201/8 www.perkinelmer.com/opto MXA-256-1, 2 Pin-Out Table PIN # FUNCTION FUNCTION PIN # 1 NC 28 NC 2 Cap 5pF Dis 27 Int/Reset 3 TEC + 26 TEC 4 CAP 2PF Dis 25 NC 5 NC 24 Cap 10pF Dis 6 Thermistor 23 Vdd 7 Thermistor 22 Vss 8 NC 21 Vref 9 Ev Clock 20 Odd Clock 10 NC 19 NC 11 Ev EOS 18 Odd EOS 12 NC 17 NC 13 Ev Video 1 16 Odd Video 1 14 Ev Video 2 15 Odd Video 2 Definitions Cap 5pF Dis/ Cap 2pF Dis/ Cap 10pF Dis: These 3 TTL inputs control the size of the integration capacitance well. When the pin is at high state (default) that particular capacitor is added to the integration well size. When all the three pins are in the low state, the well size is set to the default base value of 0.4pF well size. This provides a variable size of integration well - 0.4, 2.4, 5.4, 7.4, 10.4, 12.4, 15.4, and 17.4pF TEC +/- : These are the thermoelectric cooler pins Thermistor: Thermistor resistance at 25°C: 5 KΩ Ev Clock/Odd Clock: These are the timing and readout clock inputs. These are TTL compatible inputs. Both the Ev Clock and Odd Clock can be fed with the same clock, so the odd and even pixels are synchronized Int/Reset: This is a TTL compatible input used to control the integration and reset of the integration well. Integration occurs when this signal is high and reset occurs when this signal is low. Readout occurs during the reset time. Care should be taken to provide enough time to readout the data. The Int/Reset signal does not have to be synchronous with the Ev Clock/Odd Clock. 01-001:121201/9 www.perkinelmer.com/opto MXA-256-1, 2 Device Timing Parameters Ev EOS/Odd EOS Vref The EvEOS and OdEOS are timing markers that indicate the end of the even and odd readout cycle respectively. These output pulses occur immediately after the end of readout. The pulse is half the clock width and swings from Vss to Vdd. This is the input voltage reference. The output voltage swing is equal to Vref. The range of Vref voltage is 2.5V to 3.5V, with current requirement of <5mA. Power Ev Video1, 2 / Odd Video 1, 2 •Vss - Ground •Vdd - 5V, <50mA These are analog outputs of the multiplexer. These outputs are low impedance op-amp outputs and have a limited drive capability. They should be buffered as close as possible to the package output . The load on these outputs should not exceed 60 pF. Video 1 is the sample taken at the beginning of the integration and Video 2 at the end of integration. The output voltage swing is equal to Vref, which is from Vss+1. Please refer to the timing diagrams for the timing of these video signals. Operating Conditions Parameters Units Minimum VDD V VSS V Vref V 4.90 Typical 5.00 Maximum 5.20 0.00 2.5 3.00 3.5 Clock High V VDD Low V VSS Frequency Hz Duty Cycle % 10 x 103 45 1 x 106 50 55 Int/Reset High Low V V VDD VSS Select V VDD Deselect V VSS KΩ 2.00 Cap Sel Output Impedance 01-001:121201/10 www.perkinelmer.com/opto MXA-256-1, 2 Miscellaneous Typical Thermoelectric Cooler Thermistor: HOT SIDE TEMP = 50° C 0 To calculate thermistor resistance Rt at temperature T, use the following equation: ∆T (°C) Rt=R25 exp (A + B/T + C/T2 + D/T3) R25 = 5KΩ 1 2 3 Heat Load (W) 50.0 4 40.0 5 30.0 6 7 20.0 8 9 10.0 10 0.0 0 0.4 0.8 1.2 1.6 2 Current (A) Temperature Range (°C) A C B D -50 to 0 -1.4122478E+01 4.4136033E+03 -2.9034189E+04 -9.3875035+06 0 to 50 -1.4141963E+01 4.4307830E+03 -3.4078983+04 -8.8941929E+06 50 to 100 -1.4202172E+01 4.4975256E+03 -5.8421357E+04 -5.9658796E+06 Ordering Guide MXA-256-1: No pixel dropouts MXA-256-2: No two consecutive, excluding first and last pixel dropouts PerkinElmer Optoelectronics reserve the right to change or amend specifications and/or configurations at any time without notice. Canada: USA: Europe: Asia: PerkinElmer Optoelectronics 22001 Dumberry Road Vaudreuil, Québec, J7V-8P7 Canada Phone (450) 424-3300 Fax: (514) 693-2210 PerkinElmer Optoelectronics 44370 Christy Street Fremont, CA 94538-3180 Phone: (510) 979-6500 Fax: (510) 687-1152 PerkinElmer Optoelectronics GmbH Wenzel-Jaksch-Str.31 65199 Wiesbaden Phone: +49 611 492 534 Fax: +49 611 492 578 PerkinElmer Optoelectronics 47 Ayer Rajah Crescent #06-12 Singapore 139947 Phone: +65 775 2022 Fax: 65 775 1008 © 2001 PerkinElmer inc. All rights reserved. 01-001:121201/11 www.perkinelmer.com/opto