Model 121 Programmable Current Source Model 121

Product catalog summary

Overview: The Model 121 Programmable Current Source is a precision instrument designed for use in laboratories, test facilities, and manufacturing environments. It offers a low-noise, stable current output ranging from 100 nA to 100 mA, with 13 selectable ranges and a user-defined setting. The device is suitable for both bench-top and panel-mounted operations.

Key Features:

Six decades of output current selectable in 13 ranges.
Programmable current output from 100 nA to 100 mA.
Low-noise output with a large 3-digit LED display.
Simple user interface with current reversal feature.
USB interface for integration with automated test systems.
DIN panel mountable package with detachable output terminal block.
CE certification and a 3-year standard warranty.

Applications: The Model 121 is ideal for testing and measuring resistive and semiconductor devices, including temperature sensors, LEDs, Hall sensors, and more. It is particularly useful for applications requiring a stable current source, such as device quality control, LED brightness testing, temperature sensor calibration, and semiconductor device measurements.

Specifications:

Output Type: Bipolar, DC current source.
Current Ranges: 13 fixed ranges plus a user-programmable range.
Accuracy: Varies by range, with 0.05% on the 10 µA range.
Compliance Voltage: ±11 V up to 30 mA, 10 V up to 100 mA.
AC Current Ripple: Less than 0.1% on lower ranges, less than 0.01% on others.
Temperature Coefficient: 0.03% of range/°C for the 100 nA range.
Line and Load Regulation: Less than 0.01% change in output.
Stability: ±0.05% on the 100 nA range, ±0.01% per day on others.

Interface and Display:

USB interface emulating an RS-232 serial port with a baud rate of 57,600.
3-digit LED display with units in mA, µA, and nA.
Keypad with functions for range adjustment and current polarity.

General Information:

Ambient Temperature: 15 °C to 35 °C at rated accuracy.
Power Requirement: +5 VDC ±5% at 400 mA.
Size: 96 mm W × 48 mm H × 166 mm D.
Weight: 0.45 kg.
Approval: CE mark, RoHS compliant.

Ordering Information: The Model 121 is available with or without a power supply, and includes a calibration certificate and user manual. Accessories such as power supplies and terminal blocks are also available.

Catalog excerpts

Model 121 Programmable Current Source Model 121-1

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

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Model 121 Programmable Current Source Model 121-2

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...

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Model 121 Programmable Current Source Model 121-3

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

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Model 121 Programmable Current Source Model 121-4

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...

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