AMS4710 ANALOGMICRO | Alldatasheet
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Miniaturized pressure transmitter with analog 0 ... 10 V output Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz March 2020 - Rev. 1.0, preliminary Phone:+49 (0)6131/91 0730-0 Fax: +49 (0)6131/91 073-30 Internet: www.analog-micro.com E–Mail: info@analog-micro.com
FEATURES
Amplified, calibrated and temperature compensated pressure sensor with 0 … 10 V output voltage Variants for differential / gage, bidirectional differential, absolute and barometric pressure Wide variety of pressure ranges: 5 mbar up to 2 bar full scale pressure Piezoresistive sensing principle High precision digital signal conditioning Typical total accuracy < 0.5 %FSO at room temperature for standard pressure ranges Typical TEB < 0.7 %FSO (-25 … 85 °C) for standard pressure ranges Wide supply voltage range: 12 … 36 V Integrated circuit protection against reverse polarity, current limited output Compact and robust package Dust-and water-tight (IP67) M5 circular sensor connector Compact size (35 mm x 25 mm x 13.5 mm) Ready to use, simple and quick installation RoHS and REACH compliant TYPICAL APPLICATIONS Static pressure sensing Dynamic pressure sensing Barometric pressure sensing Vacuum measurement Level measurement Gas flow measurement Heating, Ventilation and Air Conditioning (HVAC) Medical Instrumentation GENERAL DESCRIPTION AMS 4710 is a series of ready -to-use, miniaturized pressure transmitters suitable for industrial and medical applications. The matchbox-sized pressure transmitters are calibrated and temperature compensated in a wide tempera ture range of -25 … 85 °C and allow precise pressure measurements with high long term stability. AMS 4710 features a large supply voltage range of 12 … 36 V, reverse polarity protection (Vs – GND) and a current limited 0 … 10 V voltage output . It comes in a robust plastic package, which is dust - and water-tight conforming to IP67. Pressure is either applied through two barbed side ports for differential (relative) or bidirectional differential pressure transmitter types or through a single port for absolute or barometric types. The electrical connection is realized with an M5 circular sensor connector. The pressure transmitters in the AMS 4710 series are availabe for all pressure types and various pressure ranges: differential pressure sensors (also for relative/gage meausurements) in pressure ranges from 0 … 5 mbar up to 0 … 2 bar, absolute pressure sensors for 0 … 1 bar and 0 … 2 bar as well as a barometric sensor for 0.7 … 1.2 bar. Bidirectional differential sensors are available from -5 … 5 mbar up to -1 … 1 bar for the measurement of positive and negative differential pressure. Custom pressure ranges or modifications are availble on request.
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 2/8 www.analog-micro.com PRESSURE RANGES Pressure transmitter type (code) Pressure type Pressure range in mbar Burst pressure1) in bar Pressure range in PSI Burst pressure1) in PSI Ultra low pressure ranges AMS 4710-0005-D differential / relative 0 ... +5 > 0.2 0 ... 0.073 > 3 Low pressure ranges AMS 4710-0020-D differential / relative 0 ... 20 > 0.4 0 ... 0.290 > 6 Standard pressure ranges AMS 4710-0200-D differential / relative 0 ... 200 > 5 0 ... 2.901 > 72 Table 1: AMS 4710 standard pressure ranges (other ranges on request) Notes: 1) Burst pressure is defined as the maximum pressure , which can be applied to one pressure port relative to the other port (or while only one pressure port is connected) without causing damages / leaks. MAXIMUM RATINGS Parameter Minimum Typical Maximum Units Absolute maximum supply voltage: Vmax 36 V Operating and storage temperature: T -25 85 °C Common mode pressure: pCM 1) 5 bar Table 2: Maximum ratings Notes: 1) Common mode pressure is defined as the maximum pressure, which can be applied simultaneously on both pressure ports of a differential or bidirectional pressure sensor module without causing damages, while no differential pressure is applied.
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 3/8 www.analog-micro.com SPECIFICATIONS All parameters apply to VS = 24 V, Top = 25 °C, RL = 10 kΩ and pCM = 0 mbar, unless otherwise stated. Parameter Minimum Typical Maximum Units Analog output signal @ specified minimum pressure (see “pressure ranges”)1) < 0.025 0.05 V @ specified maximum pressure (see “pressure ranges”)1) 10 V Full span output (FSO)2) 10 V without pressure (only bidirectional differential types) 5 V Total accuracy3) @ Top = 25°C Ultra low pressure types (5, 10 mbar) ±1.0 ±1.5 %FSO Low pressure types (20, 50, 100 mbar) ±0.5 ±1.0 %FSO Standard pressure types (≥ 200 mbar) ±0.5 ±1.0 %FSO TEB / Overall error4) @ Top = -25 .. 85°C Ultra low pressure types (5, 10 mbar) ±1.5 ±2.5 %FSO Low pressure types (20, 50, 100 mbar) ±1.0 ±2.0 %FSO Standard pressure types (≥ 200 mbar) ±0.7 ±1.5 %FSO Long term stability < 0.5 %FSO/a Nonlinearity5) -0.3 < 0.1 0.3 %FSO Resolution analog output signal 0.05 %FSO Supply voltage (VS to Ground) 12 24 36 V Current consumption 10 mA Response time (10% .. 90% rise time) 1 2 ms Load resistor RL 1 kΩ Capacitive load 50 nF Dependency of VOUT on VS 6) < 0.1 %FSO Pressure changes 106 Compensated operating temperature range -25 85 °C Weight without cable 20 gram Dimensions (l x w x h, standard version without tubes) 35.0 x 25 x 13.5 mm3 Media compatibility See notes7), 8) Table 3: Specifications SPECIFICATION NOTES: 1) Pressure ranges are specified in Table 1. 2) The Full Span Outpu t (FSO) is the algebrai c difference between the output signal at the specified minimum pressure and the output signal at the specified maximum pressure (nominal FSO = 10 V). 3) The total accuracy is defined as the maximum deviation of the measurement value from the ideal transfer function at room temperature (RT) in %FSO including the adjustment error (offset and span), nonlinearity, pressure hysteresis and repeatability. Nonlinearity is the measured deviation from the best fit straight line (BFSL) across the entire pressure range. Pressure hysteresis is the maximum deviation of the output value at any pressure within the specified range when th e pressure is cycled to and from the specified minimum or maximum pressure. Repeatability is the maximum variation of the output value at any pressure within the specified range over 10 pressure cycles. 4) The overall error (also known as total error band, TEB) is defined as the maximum deviation of the measurement value from the ideal transfer function in %FSO across the entire temperature range (-25 ... 85 °C).
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 4/8 www.analog-micro.com 5) Defined as best fit straight line (BFSL). 6) The given value is the maximum deviation from the output voltage at VS = 24 V over the complete supply voltage range at any pressure in the specified range. It is normalized to the FSO. 7) Media compatibility of pressure port 1 (for a description of port 1, see Figure 3): fluids and gases non-corrosive to PA66, ceramics, silicon, Pyrex and RTV silicone rubber. 8) Media compatibility of pressure port 2 (for a description of port 2, see Figure 3): clean, dry gases, non-corrosive to PA66, ceramics, silicon, RTV silicone rubber, gold and tin (alkaline or acidic liquids can destroy AMS 4710). FUNCTIONAL DESCRIPTION AMS 4710 pressure transmitters are based on piezoresistive pressure sensing technology. They combine a high quality piezoresistive silicon sensing element with a modern mixed-signal conditioning circuit, which are assembled together on a ceramic substrate and housed in a robust plastic package. The physical pressure applied at the sensor’s pressure ports is converted into a differential voltage signal at AMS 4710’s piezoresistive pressure sensing element. This differential voltage is signal -conditioned and converted into a standardized 0 ... 10 V voltage output signal in the following way (see Figure 1): The sensing element’s differential voltage signal is amplified and compensated by a mixed -signal conditioning ASIC. At first the differential voltage is pre-amplified and converted into a digital signal using a 14-bit ADC. This digitized signal is mathematically processed by the ASIC’s integrated microcontroller unit (μC) to obtain a calibrated and temperatu re compensated output signal. For this purpose the μC uses a correction algorithm and individual correction coefficients stored in the ASIC’s EEPROM during AMS 4710’s factory calibration process. The temperature value needed for temperature compensation is measured directly at the pressure sensing element. An 11-bit DAC unit converts the corrected digital signal back into an analog voltage signal. The following amplifier output stage generates a short circuit protected, standardized 0 ... 10 V output voltage singnal VOUT. AMS 4710’s output voltage VOUT is independent of the applied supply voltage and a linear function of the applied pressure p1. It is given by: V10pp pp)p(V minmax min OUT (1) wherein pmin is the sensor’s specified minimum pressure an d pmax is the specified maximum pressure, given by the sensor’s pressure range in Table 1. 1 The applied pressure p is the pressure difference between port 1 and 2 f or differential and bidirectional differential pressure sensors. For relative pressure types it is the pressure difference between port 1 and ambient pressure and for absolute and barometric pressure types it is the pressure at port 2 (for the definition of ports see Figure 3). Figure 1: AMS 4710’s block diagram
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 6/8 www.analog-micro.com DIMENSIONS AND PINOUT Notes: 1. Absolute and barometric pressure types only have pressure port 2. 2. Package material is Zytel PA66. 3. The electrical connection is established using an M5 sensor connector series 707 from Binder GmbH. 4. For pressure connections Analog Microelectronics recommends a silicone tubing (inner diameter Ø ID = 3.2 mm, outer diameter ØOD = 6.4 mm or ØID = 3 mm, ØOD = 7 mm) or a soft PU tubing (ØID = 4 mm, ØOD = 6 mm) 5. If silicone tubing is used it is recommended to use hose clamps. Figure 3: Dimensions and pinout of AMS 4710
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 7/8 www.analog-micro.com INFORMATION ON ORDERING Example ordering code: Pressure range: Pressure range code Mbar PSI kPa 0005 5 0.073 0.5 0010 10 0.145 1 0020 20 0.290 2 0050 50 0.725 5 0100 100 1.450 10 0200 200 2.901 20 0350 350 5.076 35 0500 500 7.251 50 1000 1000 14.50 100 1200 1200 17.40 120 2000 2000 29.01 200 Code Pressure type Available pressure ranges B Barometric (absolute) 700 ... 1200 mbar ADDITIONAL EQUIPMENT ORDER NUMBER DELIVERY FORM M5-Cable 3-wire cable with mating M5 sensor connector (2 m long) wiring: brown – Vs, blue – OUT, black – GND PU-tubing-4-6 matching soft PU-tubing (please order in m) Silicon tubing-3-6 matching silicon tubing (please order in m) Table 4: Additional Equipement
Miniaturized pressure transmitter with analog 0 ... 10 V output March 2020 - Rev. 1.0, preliminary Page 8/8 www.analog-micro.com NOTES Analog Microelectronics GmbH reserves the right to amend any dimensions, technical data or other information contained herein without prior notification.