If you get the "Sorry, the file cannot be displayed. There seems to be a technical issue ..." error when trying to view an image, please make sure you access the site at http://w140.com/tekwiki/, not www.w140.com/tekwiki/ (with "www"). Sorry for the inconvenience - we are looking for a generic solution.


From TekWiki
Jump to: navigation, search
Tektronix 5A21N
1 MHz differential amplifier
5A21N front view

Compatible with 5000-series scopes

Produced from 1971 to 1991

Manuals – Specifications – Links – Pictures

The Tektronix 5A21N is a high-gain differential amplifier plug-in for 5000-series scopes. In addition to inverting and noninverting differential inputs, it also features a current probe input for 125-turn probes such as the P6021. Unlike more advanced differential amplifier plug-ins, it has neither a DC offset control nor a built-in comparison voltage source, and the HF bandwidth limit is fixed to 10 kHz when active.


Bandwidth 1 MHz
Deflection 50 μV/Div to 5 V/Div or 0.5 mA/Div to 0.5 A/Div, 1-2-5
Input impedance 1 MΩ // 47 pF