MODEL 619M DIFFERENTIAL AMPLIFIER
Description
The Model 619M is a low cost differential amplifier ideal for test environments where high CMRR is desired. The modules are designed to plug into either Encore’s standard 19 inch rack or the single or dual module desktop unit. The integrated AC power supply provides the necessary DC voltage to operate the modules. Low output noise, user selectable gain and operating mode and expandability are just some of the features that make the Model 619M the choice for demanding applications.
Specifications
| Input signal: | ±10V max, x1.0 range; ±100V max., x0.1 range |
| Input impedance: | 100k ohms min., each input |
| Operating modes: | DC coupled, AC coupled, zero |
| Gain: | Switch selectable 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, plus x1.0/x0.1 attenuator |
| Gain vernier: | Continuously adjustable lockable ten-turn dial spans gain steps |
| CMRR: | 75dB, DC to 70Hz |
| Frequency response: | DC to 10kHz direct coupled, with filter out; 0.4Hz AC coupled response; Model 619M-002 frequency response 10kHz to 20kHz |
| Filter: | Four-pole lowpass filter, switch-selectable for 300Hz, 1kHz, 20kHz and Out; other frequencies available on request |
| Input DC offset suppression: | 0 to ±1.2V in x1.0 range, 0 to ±12V in x0.1 range |
| Signal output: | ±10V max., 10mA peak load |
| Output noise: | 10 microvolts RMS RTI max., DC to 20kHz at G=1000 |
| Power: | Unregulated ±24V from rack-mounted supply, +85mA/-45mA |
Rack Mounting
| Carrying case: | two module desktop case |
| Mechanical: | 19″W x 5.25″H x 11″D, six-module rack adapter
 M619 Differential Amplifier Rack |