Overview
The NCN5193MNTWG, produced by onsemi, is a single-chip, CMOS modem designed for use in Highway Addressable Remote Transducer (HART) field instruments and masters. This modem integrates all the necessary functions to satisfy HART physical layer requirements, including modulation, demodulation, receive filtering, carrier detection, and transmit-signal shaping. It also features an integrated DAC for low-BOM current loop slave transmitter implementation. The NCN5193 operates using phase continuous frequency shift keying (FSK) at a bit rate of 1200 bits per second.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Ambient Temperature (TA) | -40 | 85 | °C | |
| Supply Voltage (VDD) | 1.8 | 3.5 | V | |
| Input Voltage, Low (VIL) | 0.2 * VDD | V | ||
| Input Voltage, High (VIH) | 0.8 * VDD | V | ||
| Output Voltage, Low (VOL) | 0.4 | V | ||
| Output Voltage, High (VOH) | VDD - 0.4 | V | ||
| Total Power Supply Current (IDD) | 70 | 500 | μA | |
| Demodulator Jitter | 12% of one bit | |||
| Modulator Output Frequencies | 1200 Hz (mark) | 2200 Hz (space) | Hz | |
| Carrier Detect Reference (CDREF) | 1.15 | V |
Key Features
- Single-chip CMOS modem for HART field instruments and masters.
- Phase continuous frequency shift keying (FSK) at 1200 bits per second.
- Integrated DAC for low-BOM current loop slave transmitter implementation.
- Modulator with signal shaper, carrier detect circuitry, and analog receiver.
- Demodulator circuitry with band-pass filter and digital output.
- Half-duplex operation with receive circuits disabled during transmit and vice versa.
- Support for external resonator or clock source.
- Voltage references (AREF and CDREF) for internal operational amplifiers.
Applications
The NCN5193MNTWG is designed for use in various industrial automation and process control systems, particularly those requiring HART communication. Key applications include:
- HART field instruments and masters.
- Process control systems.
- Industrial automation.
- 4-20 mA loop-powered transmitters.
Q & A
- What is the primary function of the NCN5193MNTWG?
The NCN5193MNTWG is a single-chip CMOS modem designed for use in HART field instruments and masters, providing modulation, demodulation, and other necessary functions for HART communication. - What is the bit rate of the NCN5193MNTWG?
The bit rate of the NCN5193MNTWG is 1200 bits per second. - What type of modulation does the NCN5193MNTWG use?
The NCN5193MNTWG uses phase continuous frequency shift keying (FSK). - What are the typical frequencies used for mark and space in the NCN5193MNTWG?
A logic “1” or mark is represented by a frequency of 1200 Hz, and a logic “0” or space is represented by a frequency of 2200 Hz. - What is the purpose of the integrated DAC in the NCN5193MNTWG?
The integrated DAC is for low-BOM current loop slave transmitter implementation. - How does the NCN5193MNTWG manage power consumption during transmit and receive operations?
The receive circuits are disabled during transmit operations and vice versa, providing half-duplex operation to conserve power. - What are the voltage references used in the NCN5193MNTWG?
The NCN5193MNTWG uses AREF and CDREF as voltage references for the internal operational amplifiers. - What is the significance of the carrier detect (CD) signal in the NCN5193MNTWG?
The CD signal goes logic high if the received signal is above 100 mVpp during four consecutive carrier periods. - What type of oscillator can be used with the NCN5193MNTWG?
The NCN5193MNTWG can use either a simple external resonator or an external clock source. - What is the typical operating temperature range for the NCN5193MNTWG?
The typical operating temperature range is from -40°C to 85°C.
