Highly Configurable 8 Channel ±25 V Universal Input Low Power Analog Front-End
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The NAFE13388 / NAFE73388 is a highly configurable industrial-grade multichannel universal input analog front-end (AFE) that meets high-precision measurement requirements. The device integrates low-leakage, high-voltage (HV) fast multiplexers, low-offset and lowdrift programmable gain amplifier (PGA) and buffers, high data-rate 24-bit Delta-Sigma analog-to-digital converter (ADC), precise voltage and current excitation source, and low-drift voltage reference. All of the HV analog pins are diode-protected internally for electromagnetic compatibility (EMC) and miswiring scenarios. The NAFE13388 / NAFE73388 are equipped with various diagnostic and supplies supervisory circuitry for condition monitoring and anomaly detection. Two precise calibration voltage sources are made available for ease of end-to-end system self-calibration and predictive maintenance.
The NAFE13388 is dedicated to low power applications while the NAFE73388 supports high speed data rate up to 576 kSPS.
The NAFE13388 and NAFE73388 are designed for programmable logic controllers (PLC), I/O modules, data loggers, instrumentation, and high precision sensor and data acquisition systems.
Product Details
Features
Eight Configurable HV Inputs
- Single-ended or differential, with ranges up to ±25 V
- Independent configurations for voltage and current ranges
- Overvoltage protected up to ±36 V for less than one hour
Programmable Gain
- x0.2 to x16
Fast Data Rates
- NAFE13388: 7.5 SPS to 288 kSPS
- NAFE73388: 15 SPS to 576 kSPS
- Simultaneous 50 Hz/60 Hz line rejection
- ENOB:
- NAFE13388: 17-bit at 72 kSPS / 24-bit at 30 SPS
- NAFE73388: 17-bit at 144 kSPS / 24-bit at 50 SPS
High Accuracy
- 0.005 % FS accuracy at room after user calibration
- 0.1 % FS accuracy over -25 ⁰C to 105 ⁰C
System Calibration
- End-to-end calibration with integrated precise voltage sources
- Accurate factory-calibrated products available
Key Features
- ±3 ⁰C internal temperature sensor
- Precise excitation voltage and current sources
- 0.2% internal oscillator accuracy at room temperature
- Diagnostic system for faults detection and prediction
- CRC error detection
- Ten GPIOs
- 32 MHz SPI interface
- Robust 8 kV HBM ESD and IEC61000-4-5 2 kV surge protection
- Power supply: HV: ±7 V to ±24 V, LV: 3.3 V
- Power Consumption: 150 mW for low power version and 160 mW for the high speed
- Operating temperature range TA: -40 ⁰C to +125 ⁰C
- Package: 64 pin, 9 mm x 9 mm x 0.85 mm HVQFN
Product Longevity Program
- These products are included in the NXP Product Longevity program ensuring a stable supply of products for 15 years for your embedded designs.
Documentation
Quick reference to our documentation types.