Cryogenic Instruments Model 121 Programmable Current Source Model 121 Programmable Current Source ■ 6 decades of output current, selectable in 13 ranges ■ Programmable current output, 100 nA to 100 mA ■ Large 3 digit LED display ■ Simple user interface ■ Current reversal feature ■ USB interface enables integration with automated test systems ■ DIN panel mountable package ■ Detachable output terminal block ■ Full 3 year standard warranty ^1 Lake Shore Cryotronics, Inc. I t. 614.891.2244 I f. 614.818.1600 I [email protected] I www.lakeshor

Model 121 Programmable Current Source Introduction Cryogenic Instruments Introduction The Model 121 programmable current source is a precision instrument suitable for bench-top use or panel-mounted operation in labs, test facilities, and manufacturing environments. It provides a low noise, highly-stable source of current up to 100 mA, with convenient manual selection through 13 pre-set output levels, each representing a ten-fold change in power when attached to a resistive load. A “user” setting allows the current output to be defined anywhere within the operating range of the unit, from 100...

Introduction Cryogenic Instruments Model 121 Programmable Current Source Model 121 possible applications I Hall mag field sensor Diode Sensor constant I Hall Sensor Semiconductor device Brightness test/measure (independent of voltage drop) Diode temperature sensor Electrochemistry applications Test/calibration/measure (R=V/I, R varies with T) Plating, titration, potentiometry Application range of Model 121 Using the Model 121 with a resistive device/sensor Model 121 Current Source Lake Shore Cryotronics, Inc. | t. 614.891.2244 | f. 614.818.1600 | e. [email protected] | www.lakeshor

Model 121 Programmable Current Source Output Type: Bipolar, DC current source Current ranges: 13 fixed ranges of 100 nA, 300 nA, 1 µA, 3 µA, 10 µA, 30 µA, 100 µA, 300 µA, 1 mA, 3 mA, 10 mA, 30 mA, 100 mA, plus a user programmable range Accuracy: 0.05% on 10 µA range, 0.5% on 100 nA and 300 nA ranges, 0.1% on all other ranges Compliance voltage: ±11 V up to 30 mA, 10 V up to 100 mA AC current ripple: Less than 0.1% on 100 nA and 300 nA ranges, Less than 0.01% on all other ranges in properly shielded system Current ripple frequency: Dominated by the switching power supply line frequency/ harmonics...