Capacitive pressure sensor signal conditioner with integrated 20 bit ADC and DSP module XINPU TECHNOLOGY XPS3502AN10E
XPS3502 High Voltage High Precision Capacitive Pressure Sensor Signal Conditioner
Product Overview
The XPS3502 is a highly integrated mixed-signal analog voltage output pressure sensor signal conditioner designed for automotive pressure sensors, as well as industrial and process control components. It features amplification, calibration, temperature compensation, and non-linearity compensation to achieve repeatable measurements. Utilizing a proprietary 24-bit DSP signal processor and an integrated 16-bit DAC, it enables digital calibration for offset and span, ensuring interchangeability between sensors. The device integrates a programmable sensor excitation, a 4-stage programmable gain amplifier (PGA), a 20-bit ADC, 512 bytes of internal MTP, a DSP module, a 16-bit DAC, and an internal temperature sensor. An external temperature sensor interface is also provided for remote monitoring and signal processing. The XPS3502 supports flexible client-specific sensor compensation algorithms, including up to third-order temperature drift calibration for zero point and sensitivity, and up to third-order non-linearity calibration. It operates in both proportional voltage and fixed reference voltage modes, with programmable output voltage limiting to prevent overshoot. The device includes over-voltage protection, supports JFET high-voltage supply or direct high-voltage supply, and offers sensor diagnostic functions. Available in 10 or 16-pin packages, it supports commercial, industrial, and automotive temperature ranges and offers a calibration system (including host software and hardware). The XPS3502 supports I2C and DIO single-bus communication, catering to most client interface needs, with DIO supporting bus communication for mass production calibration.
Product Attributes
- Brand: (Xinpu Technology)
- Product Name: XPS3502
Applications
- Capacitive Pressure Sensors
- Transmitters
- Pressure Calibrators and Controllers
- Ventilators
- Instruments and Meters
Key Features
- Amplification, calibration, temperature compensation, and non-linear compensation
- Supports client sensor compensation algorithm calibration
- Supports 15pF differential capacitance input, 1-70pF common-mode capacitance input
- Supports DIO single-wire serial and I2C communication
- Signal gain up to 40x
- Supports multi-point calibration temperature correction via internal MTP lookup table
- Supports voltage mode for bridge-connected sensors
- Supports direct high-voltage supply up to 36V
- Supports bus communication (DIO and IIC)
- Power supply end can withstand positive pressure up to 36V
- Adjustable output voltage limiting
- Selectable internal or external temperature detection
- Self-diagnostic function for sensor connection power and output
- Operating temperature range: -40C to +125C
- Low current consumption (approx. 1mA, excluding sensor)
- Power-on response time
Supported Outputs
- Selectable proportional voltage and fixed reference voltage output modes
- Programmable output voltage limiting
- Selectable analog output (OUT) or digital output (I2C)
Technical Specifications
| Parameter | Symbol | Condition | Min | Typical | Max | Unit |
|---|---|---|---|---|---|---|
| Absolute Maximum Ratings | ||||||
| Supply Voltage | VDDH | 0 | 40 | V | ||
| Operating Temperature Range | -40 | +125 | C | |||
| Storage Temperature Range | -50 | +150 | C | |||
| Junction Temperature | +150 | C | ||||
| ESD Range (HBM) | 3 | KV | ||||
| Electrical Characteristics (Unless otherwise specified, VDDH = +5V, GND = 0V, TA = +25C) | ||||||
| High Voltage Supply Voltage | VDDH | 0.1uF bypass capacitor recommended | 5.5 | 36.0 | V | |
| Operating Current | IDD | (Note 1) | 1.3 | mA | ||
| Max MTP Write Current | IVDDH | 7.0VDDH7.2 | 8.0 | mA | ||
| Max MTP Read Current | IVDDH | 7.0VDDH7.2 | 10 | uA | ||
| Internal Oscillator Frequency | fosc | 8.0 | MHz | |||
| Power-on Stabilization Time | 3.8 | ms | ||||
| Response Time | 2.32 | ms | ||||
| Capacitance Input Offset Range | CIRO | -15 | 15 | pF | ||
| ADC Resolution | 20 | Bits | ||||
| Excitation Frequency (CIN pin) | 32 | KHz | ||||
| Signal Gain Range (Note 7) | 40 | times | ||||
| Max Output Voltage Range (Open Load) | VOUT | Voltage difference with VDD and GND | 0.01 | V | ||
| Output Low Level (Sink Current, IOUT = 1mA) | TA = TMIN to TMAX | 0.05 | 0.10 | V | ||
| Output High Level (Source Current, IOUT = 1mA) | TA = TMIN to TMAX | 4.9 | 4.95 | V | ||
| OUT Short Circuit Current | IOUTMAX | OUT shorted to VDD | 4.7 | mA | ||
| OUT shorted to GND | 3.9 | - | ||||
| -3dB Bandwidth | f-3dB | Cload=100nF, Rload=100k | 1.6 | kHz | ||
| Recommended Load Capacitance Range | Cload | 100 | nF | |||
| Output Noise (RMS) | VNRMS | Min gain, Cload=100nF | 0.5 | mVrms | ||
| DAC Resolution | 16 | Bits | ||||
| Offset DAC Resolution (IRODAC) | Includes symbol bits | 5 | Bits | |||
| IRODAC Bit Weight (Input referred) | VOUT/ Code | DAC reference = VDD = +5.0V (Note 4) | 1 | pF/bit | ||
| Temperature ADC Resolution | 10 | Bits | ||||
| Offset | 15 | LSB | ||||
| Gain | 0.4 | /bit | ||||
| Non-linearity | 1 | LSB | ||||
| Lowest Digital Output (-40) | A3 hex | |||||
| Highest Digital Output (150) | 25A hex | |||||
| External Temperature Detection Voltage Range | VEXTEMP | TEMP external sensor (Note 5) | 0mV | 900 mV | ||
| TEMP Output Current | IEXTEMP | TA = TMIN to TMAX (Note 5) | 5 | uA | ||
| Min MTP Write Time (1 Byte) | (Note 6) | 1 | ms | |||
| Program Pulse Width | 1 | ms | ||||
Ordering Information
| Model | Temperature Range | Package Type |
|---|---|---|
| XPS3502AN10E | -40 to +125 | MSOP10* |
| XPS3502AB16E | -40 to +125 | SSOP16* |
| XPS3502AE | -40 to +125 | Bare Die* |
*Temperature range designed for guarantee, tested at room temperature.
Calibration System
| Model | Channels | Notes |
|---|---|---|
| XPS350X_CALI_MB_V1.0 | 64 | RS485 interface allows multi-level cascading. |
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