Model sr555 / sr556 operation manual current preamplifier stanford research systems 1290-d reamwood ave sunnyvale, ca 94089 u.S.A. Phone: (408) 744-9040 fax: (408) 744-9049 info@thinksrs.Com • www.Thinksrs.Com copyright © 2012 stanford research systems, inc. All rights reserved revision 1.2 (nov 201...
2 of 10 certification stanford research systems certifies that this product met its published specifications at the time of shipment. Warranty the stanford research systems product is warranted against defects in materials and workmanship for a period of one (1) year from the date of shipment. Servi...
3 of 10 1. Specifications sr555 sr556 gain (transimpedance) gain accuracy gain stability 10 7 v/a ±1% ±50 ppm / °c 10 9 v/a ±1% ±50 ppm / °c bandwidth rise‐/fall‐time dc – 120 khz (‐3db) 2.9 µs dc – 3 khz (‐3db) 120 µs input current noise (typ) 42 fa/ √ hz @ 1khz 5.0 fa/ √ hz @ 1khz input voltage no...
4 of 10 2. Typical characteristics 1.E+05 1.E+06 1.E+07 1.E+08 1.E+09 1.E+10 10 100 1000 10000 100000 1000000 gain (v/a) frequency (hz) 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 10 100 1000 10000 100000 input impedance ( ) frequency (hz) sr556 sr555 figure 1: gain figure 2: inpu...
5 of 10 1 10 100 1000 10000 10 100 1000 10000 100000 1000000 current noise density (fa/ hz) frequency (hz) 1 10 100 1000 10000 10 100 1000 10000 100000 1000000 current noise density (fa/ hz) frequency (hz) cs = 1.2nf cs is the input shunt capacitance cs is the input shunt capacitance cs = 120pf cs =...
6 of 10 1 10 100 1 voltage noise density e n (nv/ hz) 10 fron figure 6: sr5 10 t 55/sr556 me 00 10 frequency (h 5.1” echanical 000 10 hz) rear figure 5 input v 0000 1 3.1” r 5: sr555/sr5 oltage noise d 100000 1.4” 556 density.
7 of 10 3. Description the block diagram below shows the sr555/sr556 current amplifier which converts input current into a differential output voltage. The total differential output voltage is given by . A current amplifier is also called a transimpedance amplifier, or a tia. Figure 7 a block diagra...
8 of 10 4. Using the sr555/sr556 with a lockin power is supplied to the sr555/sr556 via the 9 pin cable which is supplied with the unit. If it is used as a pre‐amplifier for a srs’ lock‐in amplifier, attach one end of the cable to the connector on the rear of the sr555/sr556. With the lock‐in power...
9 of 10 6. Circuit description the transimpedence amplifier consists of opamps u1, u2 and gain resistor r7 (r3 for sr555). Input current coming through j1 and r1 will pass through r7 and sink to the output node of u2. A corresponding voltage will be present at tp1. The bias voltage signal from j2 is...
B. Sr556 part number reference value 5‐00389 c2 1500p 5‐00570 c3,c25 .1u 5‐00299 c4,c5,c8,c9,c10, c11,c17,c18,c24 .1u 5‐00260 c6,c7 470u 5‐00456 c12 .015u 5‐00450 c13,c14 .0047u 5‐00848 c19,c20, c21,c22,c23 1.0u 3‐00230 d1,d5 1n5240a 3‐00945 d2 bat54s 3‐00010 d3 green 3‐00011 d4 red 3‐00003 d6, d7 1...
