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www.perkinelmer.com/opto lighting 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 avail- able at the output) removes integrator offsets and further suppresses low fre- quency noise. the array is available in a 28 pin dual-in-line package. included in the assembly are a thermo- electric 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 mxa- 256-2. 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 ? 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 datasheet
www.perkinelmer.com/opto www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/2 parameter conditions mxa-256-x number of elements 256 0.5 mm 50 ? 28 pin with te cooler ? pa 65 mv/pj (0.97 a/w onto 15 pf) 60 mv/pj 800 to 1700 nm ?0% grade 1 = none, grade 2 = maximum 5 no two consecutive, excluding first and last 1.8 fc 435 m e- (4v onto 17.4 pf) 23500 e- (250 ? onto 15 pf) 0.15 pw/ hz 0.025 pw/ hz 40 db(>13 bits) 0.2 v/sec 2.0 v/sec 0.1 v/sec 1.0 v/sec 10 khz to 1 mhz ? t max = 64 c @ 1.8a, 8v ? t = 45 c @ 0.85a, 5v (nominal) -40 c to 70 c 0 to 40 c -5 c to 70 c typical @ 1550 nm cint = 15pf minimum @ 1550 nm cint = 15pf @ 1550 nm 100 khz readout t=1 msec t=100 msec typical for t 10 msec typical pixel maximum pixel typical pixel maximum pixel hot side temperature 27 c no cooler with cooling pixel height pixel pitch package dark current response wavelength response response uniformity pixel dropouts noise equivalent charge full well capacity read noise nep @ 25 c *optical dynamic range @ 25 c dark voltage rate @ 25 c, t=10 ms dark voltage rate @ 5 c, t=10 ms pixel readout rate te cooler (one stage) storage temperature case operating temperature range *optical dynamic range defined as: 10 log (v max - v dark) /v noise v max = 3.0 v @ v ref = 3.0 volts
www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/3 dark voltage rate
www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/4 standard deviation noise
www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/5 optical dynamic range
www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/6 mxa-256 basic dimensions units: mm rev. 0 dwg # sk-03491
www.perkinelmer.com/opto MXA-256-1, 2 01-001:121201/7 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 ?ero?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.
www.perkinelmer.com/opto MXA-256-1, 2 timing diagrams 01-001:121201/8 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.
www.perkinelmer.com/opto pin-out table MXA-256-1, 2 pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 function pin # function nc cap 5pf dis tec + cap 2pf dis nc thermistor thermistor nc ev clock nc ev eos nc ev video 1 ev video 2 28 27 26 25 24 23 22 21 20 19 18 17 16 15 nc int/reset tec nc cap 10pf dis vdd vss vref odd clock nc odd eos nc odd video 1 odd video 2 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?: 5 k ? 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 definitions
www.perkinelmer.com/opto MXA-256-1, 2 ev eos/odd eos 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. ev video1, 2 / odd video 1, 2 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. vref 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 vss - ground vdd - 5v, <50ma device timing parameters operating conditions parameters vdd vss vref clock high low frequency duty cycle i nt/reset high low cap sel select deselect output impedance units v v v v v hz % v v v v k ? minimum 4.90 2.5 10 x 10 3 45 typical 5.00 0.00 3.00 vdd vss 50 vdd vss vdd vss 2.00 maximum 5.20 3.5 1 x 10 6 55 01-001:121201/10
www.perkinelmer.com/opto MXA-256-1, 2 miscellaneous ordering guide typical thermoelectric cooler thermistor: to calculate thermistor resistance rt at temperature t, use the following equation: r t =r 25 exp (a + b/ t + c/ t 2 + d/ t 3 ) r 25 = 5k ? temperature range (?) -50 to 0 0 to 50 50 to 100 a -1.4122478e+01 -1.4141963e+01 -1.4202172e+01 b 4.4136033e+03 4.4307830e+03 4.4975256e+03 c -2.9034189e+04 -3.4078983+04 -5.8421357e+04 d -9.3875035+06 -8.8941929e+06 -5.9658796e+06 01-001:121201/11 2001 perkinelmer inc. all rights reserved. canada: perkinelmer optoelectronics 22001 dumberry road vaudreuil, qu?bec, j7v-8p7 canada phone (450) 424-3300 fax: (514) 693-2210 usa: perkinelmer optoelectronics 44370 christy street fremont, ca 94538-3180 phone: (510) 979-6500 fax: (510) 687-1152 europe: perkinelmer optoelectronics gmbh wenzel-jaksch-str.31 65199 wiesbaden phone: +49 611 492 534 fax: +49 611 492 578 asia: perkinelmer optoelectronics 47 ayer rajah crescent #06-12 singapore 139947 phone: +65 775 2022 fax: 65 775 1008 hot side temp = 50 c 0 1 2 3 heat load (w) 4 5 6 7 8 9 10 50.0 40.0 30.0 20.0 10.0 0.0 0 0.4 0.8 1.2 1.6 2 current (a) ? t (?) 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.

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