2120: Up to 200 Ap/180 Vp, Voltage or Current Source, Three-Phase
High-power gradient amplifier plus integrated power supply
- Four-quadrant linear design.
- Blanking feature lowers the noise floor on the amplifier by shutting down the output stage. This action occurs in less than 10 µs.
- Robust, linear power supply results in extremely low noise; bi-level switch design limits heat dissipation to output devices.
- Provides precision control of output offset, DC drift and gain linearity.
Key Performance Capabilities:
- Up to 200 Ap, 180 Vp
- Current-mode response: DC-5 kHz (compensation dependent); Voltage-mode response: DC-20 kHz at rated power.
- Noise Floor (when Blanking circuit is enabled): 5 µA or less
- Current Settling Time on ramp of 0A to ±50A or ±50A to 0A: 20 µs to within 1.0A or 1%; 35 µs to within 200 mA or 0.2%
The 2120 is a high-power, DC-enabled linear amplifier and integrated power supply that offers a wide bandwidth and exceptional control of drift and distortion. The 2120 functions as a voltage or current source, making it a good choice for use in the lab or classroom. Its linear design provides a very-low noise floor and fast current rise times. Because the 2120 has no ripple noise, no synching with the console is required.
Soft-clip Option: When the end user of an MRI system has the ability to adjust current rise time and level, the MRI console can require voltage and/or current that is beyond the amplifier's ability to produce. Under those conditions, the Soft-clip Option provides a smooth transition into and out of this clipped condition. This, in turn, permits useable images to be created even when operating at or beyond the capabilities of the gradient amplifier.
The AE Techron brand is known throughout the world for its robust, low-noise gradient amplifiers as well as its product service and support.
Pulse testing performed with unit operated in Controlled-Current mode with a load equal to 500 µH + 100 mΩ and at 25°C ambient temperature. *DC 1Ω.
|Output (±A Peak)||
PULSE DURATION / OFF TIME (ms)
|∞DC*||500 / 500||100 / 100||10 /20||170 / 1000||25 / 1000||4 / 100|
Front & Back
Specification typical at 25°C ambient. Unless otherwise noted; testing was done in Current mode with a load = 500 µH +100 mΩ
Peak Current Limit: 209A
Gain Linearity (over input signal, from 0.2V to 5V),
Output Offset (adjustable to zero),
Voltage Mode: Less than ±400 µV
Current Mode: ±5 mA
Current Mode (effective): 2000Ω
Voltage Mode (typical): 3 mΩ in series with 2.23 µH
Current Mode: 500 µH + 1200 µΩ
Adaptable Range: 5 µH to 2.5 H, 0.01Ω to 20Ω
Current Mode Response: −3 dB at 5 kHz (compensation dependent)
Current Settling Time, Ramp 0A to ±50A or ±50A to 0A,
20 µs: To within 1.0A or 1%
35 µs: To within 200 mA or 0.2%
Total Harmonic Distortion,
Current Mode: Less than 0.1%
Load: 500 µH + 100 mΩ
Noise Floor (when Blanking circuit is enabled): 5 µA or less
DC Drift, Self Heating Drift, 0 to ±60A: 5 mA/10 minutes, maximum
10 Hz to 1 kHz: 0.2 mA
1 kHz to 60 kHz: 0.05 mA
Ripple Noise Output: none
Slew Rate, Voltage Mode: 41 V/µs
Three-Terminal Barrier Block Connector: Balanced with ground, 20kΩ differential
BNC Connector: Unbalanced, 10kΩ single ended
Max Input Voltage: ±10V, balanced or unbalanced
Common Mode Rejection: -58 dB with 5V input
Status Display, Control, I/O
Status Indicators (front panel): LEDs indicate a status of Run, Ready, or Standby, and Fault conditions
Controls (front panel): Soft-touch Switches for Run (Enable), Stop and Reset functions
Controls (back panel): Dual-function AC mains power switch and circuit breaker; rating: 30A for 208 volts or 15A for 400 volts. Turn off and then back on to reset
Connectors (back panel),
Power Connection: NEMA-style locking receptacle; matching AC connector also included
Signal Output: 4-position terminal barrier block (OUTPUT/COMMON/ SAMPLED COMMON/CHASSIS GROUND); resistor between SAMPLED COMMON and CHASSIS GROUND terminals is a 2.7-ohm, 2W, 5%, metal-oxide resistor
Signal Input: User-selectable BNC or Barrier Strip, balanced or unbalanced
Interlock I/O Connection: 25-pin D connector provides for remote monitoring and control functions
Remote Control and Monitoring
(via back-panel D connector)
Current Monitor: 20A/V ± 1%; 10A/V ± 1% (differential configuration)
Reporting: System Fault, Over Temp, Over Voltage, Over Load
Control: Blanking control, Force to Standby, Remove from Standby, Reset after a fault
Over Load/Distortion (IOC): Shutdown or clipped output
Current vs. Time (ODEP): Clipped output
Each heat-sink temperature: Shutdown 105°C
Overvoltage Shutdown: 229 VAC / 440 VAC
Undervoltage Shutdown: 187 VAC / 360 VAC
AC Power Source: Three-phase, 208 VAC ±10%, 47-60 Hz, 30 Amp AC service; (400 VAC ±10%, 15 Amp service model available)
Operating Temperature: +10°C to +50°C (+50°F to +122°F); Maximum output poewr de-rated above 30°C (86°F)
Storage: –30°C to +85°C (–22°F to +185°F)
Humidity: 70% or less, non-condensing
Dimensions: 19”L x 22.8”D x 12.25”H (48.3 cm L x 57.9 cm D x 31.1 cm H)
Cooling: Forced air cooling from front to back through removable filters via six 100 CFM fans. No space is required between rack-mounted amplifiers. Air filters are removable from the rear via one fastener per side and may be eliminated if cabinet filtration is provided.
Weight: 153 lbs (69 kg)
Shipping Weight: 158 lbs (71.7 kg)
Complete technical specifications
For 2110 and 2120 amplifiers
For 2100- and 7000-series amplifiers
For 2105, 2110 and 2120 amplifiers
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