Voltage controlled current source
AMS 220 from AnmesysThe AMS220 is a voltage controlled current source with active common mode rejection mode. Common mode voltage signals can result in a large error when using a standard measurement set-up for low resistance measurements or when the contact resistances have a large variation. The AMS220 is designed to overcome this unwanted behavior. It is a unique instrument and uses a patented technique.
- Optimized for use with lock-in amplifier
- AC and DC electric measurements
- Low noise due to being completely analog
- Replacement of AC resistance bridges in a set-up with lock-in amplifier
- Can be used with preamplifier AMS540 and AMS560
Specifications
Voltage-to-current conversion ranges | 0.001, 0.01, 0.1, 1 and 10 [mA/V] |
Control voltage (VREF) input range (ac/dc) | 0 ÷ 3.6 V (rms) / -5 V ÷ +5 V (dc) |
Input resistance of the control voltage input | 100 kΩ |
Maximum output current ac/dc | 36 mA (rms) / ±50 mA (dc) |
Accuracy of the voltage-to-current conversion (DC) | 0.08 % |
Temperature drift | 50 ppm/°C |
Operating modes | ACTIVE CMR / ENABLED (active common mode voltage rejection is activated) ACTIVE CMR / DISABLED (current output IB is grounded) |
Targeted frequency range for ACTIVE CMR / DISABLED operation mode | DC - 20 kHz (DC - 2 kHz for 1 μA/V range) |
Targeted frequency range for ACTIVE CMR / ENABLED operation mode | DC-200 Hz |
Operating voltage swing on the current output IA against the reference ground (typ.) | up to ±[6.5 V - |VREF/2|] (± 0.3 V) |
Operating voltage swing on the current output IB against the reference ground (typ.) | up to ±6.6 V (± 0.3 V) |
Operating range of voltage differences on the current outputs IA, IB (typ.) | up to ±13.4 V |
Maximum voltage at the current outputs (against the reference ground) | ±10 V |
Maximum voltage difference on the current outputs | ±20 V |
Power supply | 12 V (ac) / 50-60 Hz |
Maximum power input | 7 W |
Dimensions (W x H x L) | 158 mm x 120 mm x 230 mm |
Weight | 2.3 kg |
Applications
Measurements of superconductive samples
Measurements of metals at very low temperatures
Thermometry
I-V curves
Hall effect
Downloads
Contact
Julien
Dumouchel
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Quantum Design AG
Route du Roule 41
CH-1723 Marly
Switzerland
Phone: | +41 21 8699-033 |
E-Mail: | suisse@qd-europe.com |