Mikroelektronika d.o.o.
GainAMP 3 Click-Platine
GainAMP 3 Click-Platine
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Overview
Der GainAMP 3 Click Board™ ist eine kompakte Zusatzplatine, die einen 4-Kanal-Verstärker mit programmierbarer Verstärkung enthält. Diese Platine enthält den ADA4254, einen driftfreien, hochspannungsgesteuerten Instrumentenverstärker mit programmierbarer Verstärkung von Analog Devices. Er verfügt über 12 binär gewichtete Verstärkungen und drei Skalierungsverstärkungsoptionen, die 36 mögliche Verstärkungseinstellungen ergeben. Er wird mit einem Eingangsmultiplexer geliefert, der ±60-V-Schutz für die hochohmigen Eingänge des Verstärkers bietet, und einem Erregerstromquellenausgang, der für Vorspannungssensoren wie Widerstandstemperaturdetektoren (RTDs) verfügbar ist. Die driftfreie Verstärkertopologie des ADA4254 kalibriert Gleichstromfehler und niederfrequentes Rauschen selbst und erreicht so eine hervorragende Gleichstrompräzision über den gesamten angegebenen Temperaturbereich, maximiert den Dynamikbereich und reduziert die Kalibrierungsanforderungen in vielen Anwendungen erheblich.
Das GainAMP 3 Click Board™ stellt dank seines geringen Stromverbrauchs die perfekte Wahl für Industriesysteme und Prozesssteuerungen dar, bei denen Präzision, Robustheit und geringer Stromverbrauch gefragt sind.
| General Information | |
|---|---|
Part Number (SKU) |
MIKROE-4800
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Manufacturer |
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| Physical and Mechanical | |
Weight |
0.02 kg
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| Other | |
Country of Origin |
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HS Code Customs Tariff code
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EAN |
8606027383946
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Warranty |
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How Does The GainAMP 3 Click Board™ Work?
The GainAMP 3 Click Board™ as its foundation uses the ADA4254, a zero drift, high voltage, programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications from Analog Devices. It accurately measures sensors, voltages, and currents with wide dynamic ranges and provides safety information about what is being measured. It features 12 binary weighted gains ranging from 1/16V/V to 128V/V and three scaling gain options of 1V/V, 1.25V/V, and 1.375V/V, resulting in 36 possible gain settings. Its zero-drift amplifier topology self-calibrates DC errors and low-frequency noise, achieving excellent DC precision over the entire specified temperature range, maximizing dynamic range, and significantly reducing calibration requirements in many applications.
The ADA4254 communicates with MCU using the standard SPI serial interface with a maximum frequency of 5MHz, supporting the most common SPI mode, SPI Mode 0. It comes with a 4-channel input multiplexer providing ±60V protection to the high impedance inputs of the amplifier and an excitation current source output available to bias sensors such as resistance temperature detectors (RTDs). In addition to these channels located on the onboard 9-pole connector, the ADA4254 also has a differential output stage and output excitation current channels.
A differential output stage allows the device to be directly connected to high-precision ADCs. When making such a connection, it is recommended to use a low-pass filter before a connection to the ADCs to minimize noise and aliasing. A software configurable excitation current outputs can be used to excite external circuitry, such as resistive bridges or RTD sensors, and be programmed to a value from 100μA to 1.5mA in increments of 100μA.
The GainAMP 3 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. In addition to choosing the logic voltage level using jumper labelled as DIGI, it is also possible to select the supply voltage of the amplifier using the AN jumper by positioning SMD jumpers to an appropriate position. This way, it is allowed for both 3.3V and 5V capable MCUs to use the SPI communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
Specifications
| Type | Amplifier |
| Applications | Can be used for industrial systems and process control that demand precision, robustness, and low power, thanks to its low power consumption |
| On-board modules | ADA4254 - zero drift, high voltage, programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications from Analog Devices |
| Interface | SPI |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V, External |
Pinout Diagram
This table shows how the pinout on the GainAMP 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | NC | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
Onboard Settings and Indicators
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL-DIGI | Left | Logic Voltage Level Selection 3V3/5V: Left position 3V3, Right position 5V |
| JP2 | VCC SEL-AN | Left | Amplifier Supply Voltage Level Selection 3V3/5V: Left position 3V3, Right position 5V |
GainAMP 3 Click Board™ Electrical Specifications
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage VCC | 3.3 | - | 5 | V |
| External Supply Voltage VDDH − VSSH | 10(±5) | - | 56(±28) | V |
| Gain Steps | 1/16 | - | 128 | V/V |
| Operating Temperature Range | -40 | +25 | +125 | °C |
Frequently Asked Questions
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