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XGZP-197 Pressure Sensor
-50mmHg～300mmHg
Gauge pressure type
MEMS piezoresistive technology
Calibrated and temperature compensated
Medical-grade silicone gel insulation, AAMI compliant
Low cost for high volume
XGZP197 Invasive Pressure Sensor is a sensor designed for use in disposable blood pressure monitoring medical devices, and is designed to meet AAMI’s requirements for sphygmomanometers.
The product is based on advanced microelectromechanical principles, with a silicon piezoresistive pressure-sense chip utilizing MEMS technology as the key component. The pressure sensitive chip consists of an elastic membrane and four resistors integrated on the membrane. The four piezoresistors form a Wheatstone bridge structure, which generates a voltage output signal linearly proportional to the applied pressure when pressure is applied to the elastic membrane. The silicon piezoresistive pressure sensitive chip is mounted on a ceramic substrate and the sensor is calibrated and compensated by thick film technology circuitry to produce a highly accurate standard voltage output signal referenced to the supply voltage.
A cap is affixed to the ceramic substrate to protect the internal structure from damage and to facilitate installation in the system. The use of gel on the pressure sensitive chip ensures insulation from the outside. It can be used continuously for 168 hours and should be disposed of properly after use.
Electrical Performance
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Constant Voltage | 1 | 6 (Calibrated) | 10 | V |
| Input Resistance | 1.2 | 3.2 | kΩ | |
| Output Resistance | 285 | 315 | Ω | |
| Symmetry | -5 | 5 | % | |
| Breakdown Voltage | 10,000 | VDC | ||
| Leak Current | 2 | μA | ||
| Response Frequency | 1200 | Hz | ||
| Phase Drift | 5 | Degrees | ||
| Offset Drift | 1 | mmHg/8hrs |
Mechanical Characteristics
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Pressure Range | -50 | 300 | mmHg | |
| Offset Output | -25 | 0 | 25 | mmHg |
| Sensitivity | 4.95 | 5 | 5.05 | μV/V/mmHg |
| Calibrated Pressure① | 97.5 | 100 | 102.5 | mmHg |
| Max.Over Load Pressure | 125 | PSI |
Temperature Characteristic
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Working Temperature | 15 | 22 | 40 | ℃ |
| Storage Temperature | -25 | 70 | ℃ | |
| Relative Humidity | 10 | 90 | % | |
| Linear Hysteresis2(-50~100 mmHg) | 1 | mmHg | ||
| Linear Hysteresis2(>100~200 mmHg) | 1 | %Output | ||
| Linear Hysteresis2(>200~300 mmHg) | 1.5 | %Output | ||
| Offset Temperature Coefficient | -0.3 | 0.3 | mmHg/℃ | |
| FS Temperature Coefficient | -0.1 | 0.1 | %/℃ |
Note：
①. Applied 100mmHg pressure for calibration;
②. For linearity drift from 0 to 100mmHg.
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Key specifications
| Pressure type | Gauge |
|---|---|
| Media | Liquid (isolated) |
