NAFE13388
NAFE13388 is a highly configurable 8-channel ±25V universal input analog front-end with excitation sources for indust..
Product Overview
Description
The NAFE13388 is a highly configurable industrial-grade multichannel universal input analog front-end (AFE) designed for high-precision measurement requirements.
It integrates low-leakage high-voltage fast multiplexers, low-offset and low-drift programmable gain amplifier (PGA) and buffers, high data-rate 24-bit sigma-delta ADC.
The device features precise voltage and current excitation sources, low-drift voltage reference, and comprehensive diagnostic capabilities for predictive maintenance.
Product Series
NAFE
Primary Application
Programmable Logic Controllers (PLC)
Key Features
- 8-channel configurable universal input (voltage/current/resistance/temperature)
- 24-bit high-resolution sigma-delta ADC
- Programmable gain amplifier (0.2x to 16x)
- Integrated voltage and current excitation sources
- Overvoltage protection up to ±36V
- Factory calibrated for high accuracy
- Diagnostic system for fault detection and prediction
- 10 GPIOs for system flexibility
- Robust ESD and surge protection
- Low power consumption: 150mW
Specifications
| Input Channels | 8 configurable HV inputs |
|---|---|
| Input Range | ±25V (±36V overvoltage protected) |
| ADC Resolution | 24-bit sigma-delta |
| Data Rate | 7.5 SPS to 288 kSPS |
| PGA Gain | 0.2x to 16x (8 settings) |
| Accuracy | 0.005% FS at room, 0.1% FS over -25°C to 105°C |
| Excitation Sources | Voltage and current sources integrated |
| Interface | 32 MHz SPI with CRC |
| GPIO | 10 GPIOs available |
| ESD Protection | 8kV HBM, 2kV surge (IEC61000-4-5) |
| Package | 64-pin HVQFN 9x9mm |
| Operating Temperature | -40°C to +125°C |
Applications
Programmable Logic Controllers (PLC)
Industrial automation and control
Distributed Control Systems (DCS) I/O modules
Industrial automation and control
Data acquisition systems
Data acquisition and conversion
Industrial automation
Industrial automation and control
High-precision sensor interfaces
Sensor signal conditioning
FAE Expert Insights
"The NAFE13388 is a game-changer for industrial analog input designs. The software-configurable inputs eliminate the need for different analog input modules - one device handles voltage, current, RTD, and thermocouple inputs. The integrated excitation sources significantly reduce BOM cost and board space. I've implemented this in PLC designs where the universal input capability allows customers to use the same hardware for different sensor types. The 24-bit ADC provides excellent resolution for precision measurements. The diagnostic features enable predictive maintenance, which is increasingly important in Industry 4.0 applications."
Universal AFE with software-configurable inputs
— Michael Zhang, BeiLuo
Frequently Asked Questions
What types of sensors can NAFE13388 interface with?
NAFE13388 can interface with virtually any industrial analog sensor including: voltage sensors (±25V range), current loops (4-20mA, 0-20mA), RTDs (Pt100, Pt1000), thermocouples (all types), load cells, and resistance sensors. Each channel can be independently configured for the specific sensor type through software.
Use NAFE13388 for universal analog input modules. One device replaces multiple specialized input circuits.
What is relates to software-configurable inputs?
Software-configurable inputs allow the same hardware design to support multiple sensor types without hardware changes. This reduces inventory costs, simplifies manufacturing, and enables field-reconfigurable systems. Customers can standardize on one hardware platform and configure inputs via software for specific applications.
Implement NAFE13388 for flexible, reconfigurable analog input systems. Reduces hardware variants and inventory.
How does the integrated excitation source benefit the design?
The integrated voltage and current excitation sources eliminate external excitation circuitry, reducing BOM cost by approximately $2-3 per channel. The integrated sources are precision-matched to the ADC, ensuring accurate measurements. This integration also reduces board space and improves reliability.
Use NAFE13388 for RTD, thermocouple, and load cell applications to leverage integrated excitation.
What diagnostic capabilities does NAFE13388 offer?
NAFE13388 includes comprehensive diagnostics: input open/short detection, overvoltage/undervoltage monitoring, power supply monitoring, internal temperature sensor, and CRC error detection on SPI communication. These features enable predictive maintenance and system health monitoring, critical for Industry 4.0 applications.
Enable all diagnostic features for predictive maintenance. Monitor diagnostic registers for early fault detection.
What is the recommended PCB layout for NAFE13388?
Key layout considerations: Separate analog and digital ground planes with single-point connection, place decoupling capacitors close to power pins, keep high-voltage input traces away from sensitive analog signals, use guard rings around high-impedance inputs, and ensure proper thermal vias under the exposed pad. Reference designs are available from NXP.
Follow NXP reference design PCB layout closely. Contact FAE for layout review before production.