Programmable Current Amplifier – CA5351
- High Gain : 103 V/A to 1010 V/A (8 ranges, 10-time step)
- Wide Bandwidth : DC to 500 kHz (106 V/A), DC to 70 kHz (109 V/A)
- Fast Response : 0.7 μs (106 V/A)
- Low Noise : 2.5 fA/√Hz(1010 V/A, at 55 Hz)
- Current Suppression : ±8 nA to ±8 mA (7 ranges)
Various applications from beam position monitoring in synchrotron radiation to quantum electronics, semiconductor, MEMES and Biocheminstry research.
The model CA5351 programmable current amplifier is a current input-voltage output preamplifier with variable gain. It achieves a measurement system with both high gain and wide bandwidth, which cannot be found elsewhere. Resonance does not occur even in the presence of cable or sensor capacitance because of its unique input circuit design and technology. And there is no overshoot or ringing in the response of pulse input as well. With high gain, wide bandwidth, fast response and low noise features, the model CA5351 is an ideal solution for a variety of small current measurements.
High Gain : 103 V/A to 1010 V/A (8 ranges, 10-time step)
Wide Bandwidth : DC to 500 kHz (106 V/A), DC to 70 kHz (109 V/A)
Fast Response : 0.7 μs (106 V/A)
Low Noise : 2.5 fA/√Hz(1010 V/A, at 55 Hz)
Current Suppression : ±8 nA to ±8 mA (7 ranges)
High Gain · Wide Bandwidth
1010 V/A: DC to 14 kHz, 109 V/A : DC to 70 kHz The model CA5351 achieves a measurement system with both high gain and wide bandwidth, that cannot be found elsewhere. The bandwidth is from DC to 500kHz with a response time of 0.7 μs (gain: 106 V/A or less), so high-speed signal amplification is possible.
Adjustable Gains 103 to 1010 V/A
103/104/105/106/107/108/109/1010 (V/A) 8 selectable amplification ranges in decade increments, which allows the most suitable gain setting according to the sensor used and measurement environment.
Fast Response · Stable Operation
A high-speed response of 0.7 μs is possible with a gain of 106 V/A.
Model CA5351 can process fast pulse signals in optical system measurements.
Resonance does not occur even in the presence of cable or sensor capacitance becaue of its unique input circuit design and technology.
Also there is no overshoot or ringing in the response of pulse input.
Fast response, wide bandwidth and stability towards input capacitance makes this model suitable for various types of sensors.
When gain is 106 V/A, the rise time is 0.480 μs.
Gain: 109 V/A, Cs: Input-GND capacitance
Wide Input Current Range Coverage For Various Types of Sensors
■ Input current range of CA5351 (S/N ratio: 20dB or more)
Current Suppression ±8 nA to ±8 mA
In photoelectric conversion elements such as photodiode and phototransistor, a small current called dark current flows through even when there is no incident light.
In high-gain current amplifiers, when a small DC current input is amplified to a large voltage output, the amplifier becomes saturated, which makes the measurement impossible.
The model CA5351 also incorporates a stable and low noise suppression current supply with high resolution. This current supply can add or offset the input current.
For example, by eliminating dark current or leakage current, it can cause higher SN ratio to make the signals detectable. The “Auto Suppression” function automatically changes the current suppression range even if unwanted DC current fluctuates.
● No Current Suppression
Output saturates when the gain is more than 106 V/A
● With Current Suppression
By eliminating 10μA of the current, the gain can be set to 106 V/A, therefore it becomes possible to measure more detailed fluctuations of signals.
Low Noise Built-in Variable Filter and Low Noise DC Power Supply
It has achieved the ultimate low noise with an equivalent input noise of 2.5 fA/√Hz (at 1010 V/A, 55 Hz)
In addition, it incorprates a built-in filter with 12 setting in 1 to 3 sequences within the response speed of 1μs to 300 ms, which eliminates the noise and improves the SN ratio.
The optimum SN ratio and response speed can be used for different applications.
Furthermore, the incorporated DC low noise power supply utilized NF’s very unique technology in order to pursue and qualify the required low noise level for small current amplifications.
High-quality Performance Supported with Data
The Model CA5351 offers wide bandwidth, high gain and low noise all at the same time, which allows the greatest performance in making tradeoffs.
In below graph, it shows the comparison data of the Model CA5351 and products of other manufacturers.
Horizontal axis shows the higher the cutoff frequency is, the wider the bandwidth is.
( Data by NF, September 2020)
Display Backlight Brightness
4 levels of brightness adjustable or OFF
It can be used in experiments that is sensitive to light.
Saved Settings up to 10 memories
Detect excessive signals and display the conditions.
Detect current-voltage converted signals (input overdetection) and output connector signals (output overdetection) and display them separately.
With high gain, wide bandwidth, fast response and low noise features, The CA5351 is ideal for a variety of small current measurements
- ■ Synchrotron Radiation Facilities
Detection of small current signals generated from ion chamber
- ■ Biochemistry
Measurement of particles suspended in electrolyte by the Coulter method
- ■ Automotive
Light distribution measurement of PWM lighting LED headlight:
Amplification of small photo current of photoconductive cells
- ● Beam position monitoring for synchrotrons and storage rings
- ● I-V characteristics measurement for organic thin film devices
- ● Gate leakage current measurement of FET and IGBT
- ● Detection of STM (scanning tunneling microscope) tunnel current
- ● Conductive probe current detection of AFM (atomic force microscope)
- ● As a pre-amplifier for lock-in amplifiers
|PA-001-3512||Rackmount Kit (EIA, 1 unit)|
|PA-001-3513||Rack Mount Kit (EIA, 2 units)|
|PA-001-3514||Rack Mount Kit (JIS, 1 unit)|
|PA-001-3315||Rack Mount Kit (JIS, 2 units)|