NAFE13388 - 24-bit 8-Ch ±25V Universal Input AFE | NXP
MPN: NAFE13388 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.15 | $81.50 |
| 100 | $7.4 | $740.00 |
| 500 | $6.75 | $3,375.00 |
| 1,000 | $6.1 | $6,100.00 |
NAFE13388 Overview
An analog front-end (AFE) is the circuit block that conditions real-world analog signals - voltage, current, resistance, temperature - before digitization. In the signal-chain hierarchy it sits between field sensors or transducers and the digital controller: multiplexer -> programmable gain amplifier (PGA) -> ADC. Universal-input AFEs like the NAFE13388 replace dozens of discrete signal-conditioning components by integrating low-leakage high-voltage fast multiplexers, a low-offset low-drift PGA, and a precision converter in one silicon device.
Key features include the ±25 V input tolerance that removes the need for external attenuators and protection in many industrial modules, low-leakage HV analog inputs configurable from eight single-ended to four differential channels with external common input (AICOM) or internal AGND reference, and integrated excitation sources that directly drive RTDs and other resistive sensors. The device also integrates multiple diagnostic features that support industrial functional-safety and self-test requirements.
Architecturally, the NAFE13388 combines the fast HV multiplexers with a low-offset, low-drift programmable gain amplifier and a 24-bit converter, delivering high-precision multichannel measurement with low power. The factory-ordered configuration options (part number suffix) cover speed/power variants and calibration options within the NAFEx3388 family.
Typical applications include industrial process-control analog input modules (PLC AI cards), building and factory automation systems, RTD/thermocouple universal input measurement, and test-and-measurement equipment where 8 channels of ±25 V-capable, 24-bit digitization in one IC dramatically reduces BOM size and calibration effort.
Design consideration: because the part tolerates ±25 V directly at the pins, layout should still observe creepage/clearance rules for HV rails, and the excitation sources must be budgeted into the 150 mW power envelope.
This page adds distributor availability data, drop-in family alternatives, and practical design guidance beyond the manufacturer datasheet.
Drop-in alternatives for NAFE13388 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NAFE73388
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.75 / Unit
View Datasheet →NAFE13388 Maximum Ratings & Electrical Characteristics
| Product Type | Universal input analog front-end (AFE) |
| Number of Input Channels | 8 (up to 4 differential) |
| ADC Resolution | 24 bit |
| Input Voltage Range | ±25 V (HV analog inputs) |
| Power Consumption | 150 mW |
| Excitation Sources | Integrated (on-chip) |
| Input Multiplexer | Low-leakage high-voltage fast multiplexer |
| PGA | Low-offset, low-drift programmable gain amplifier |
| Reference Options | External common input (AICOM) or internal AGND |
| Diagnostics | Integrated diagnostic features |
| Package | 64-HVQFN (9x9 mm) |
| Mounting Type | Surface Mount |
| Grade | Industrial-grade |
| Orderable Part (SKU) | NAFE13388B40BSK |
| Lifecycle Status | Active |
NAFE13388 64-hvqfn (9x9 mm) Pin Configuration Guide
Pin configuration for NAFE13388 (64-hvqfn (9x9 mm) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for NAFE13388.
Refer to the datasheet for full pin configuration.
Typical Applications
NAFE13388 is suitable for 6 applications: Industrial PLC Analog Input Modules, RTD and Thermocouple Temperature Measurement, Building and Factory Automation, Test and Measurement Instrumentation, Battery-Operated Data Loggers, Energy and Power Monitoring.
Industrial PLC Analog Input Modules
The NAFE13388 fits PLC analog input cards because its ±25 V HV inputs tolerate industrial 24 V field signal levels directly, eliminating external attenuators and protection stages. Eight single-ended or four differential channels per IC let one device cover a typical 8-point AI card, and integrated diagnostics support module self-test routines required in industrial automation. Used between field terminals and the module MCU over SPI, the 24-bit converter resolves both 0-10 V and millivolt signals with one architecture. The main trade-off is power: budget the 150 mW consumption across channel count in dense cards. NXP application note AN14547 documents a four-channel universal input solution using this family, providing a validated reference for module designers.
Recommended
RTD and Thermocouple Temperature Measurement
The NAFE13388 integrates excitation sources that directly drive RTD sensors, while its low-offset, low-drift PGA and 24-bit delta-sigma ADC resolve microvolt-level thermocouple signals. Because inputs tolerate ±25 V, one universal input channel can be wired for RTD, thermocouple or plain voltage probes without front-end rework - a key requirement in building automation and process instrumentation. Place the excitation source current through the RTD and measure with the PGA in high-gain mode; the 24-bit result supports 0.1 C-class accuracy with proper linearization. The trade-off versus a dedicated temperature AFE is slightly higher power (150 mW), acceptable in mains-powered modules. The NAFE13388-UIM Arduino shield provides a quick evaluation path for this use case.
Recommended
Building and Factory Automation
In building management systems (BMS) and factory automation I/O, the NAFE13388 consolidates analog sensing of 0-10 V actuators, resistive sensors and contact-level signals into one IC. The ±25 V input rating covers wiring faults such as miswired 24 V field power onto an analog input - a common field failure that destroys conventional AFEs. Integrated diagnostics enable periodic channel health checks without extra muxes or comparators. Its 150 mW budget suits DIN-rail mounted controllers with passive cooling, and the SPI interface pairs with standard automation MCUs. Designers should observe creepage/clearance rules at the HV terminals even though the IC tolerates the voltage. NXP's open-CMSIS driver packs on the NAFE13388-UIM board shorten firmware development for these platforms.
Recommended
Test and Measurement Instrumentation
Bench and modular instruments (DAQ modules, data loggers) benefit from the NAFE13388's combination of 24-bit resolution, eight multiplexed inputs and ±25 V direct measurement range. The low-leakage HV multiplexer preserves accuracy when measuring high-impedance sources, and the PGA's low drift keeps gain error stable across temperature, reducing calibration frequency. Integrated excitation sources let a single instrument channel handle voltage, current-shunt and resistance measurements by reconfiguration rather than re-wiring. At 150 mW the device suits portable and rack instruments alike. When scanning channels at speed, account for delta-sigma settling per channel switch - consult the NXP datasheet timing tables. The GitHub nxp-appcodehub examples (NAFE13388 with i.MX RT1170) provide ready-made acquisition firmware for prototyping.
Recommended
Battery-Operated Data Loggers
The NAFE13388's 150 mW operating power, combined with its ability to wake, scan multiple channels and return results over SPI, suits multi-channel battery-powered loggers used in energy monitoring and condition monitoring. The ±25 V input tolerance protects against transient overvoltage on long field cabling where surge protection is limited by battery budget. Because excitation sources are integrated, RTD logging needs no external current source, saving quiescent power and board area versus discrete solutions. Duty-cycle the converter between samples to push average power well below the 150 mW active figure. Note that 24-bit conversion takes longer per sample than 16-bit - the family's NAFE73388 variant trades resolution for speed in power-critical designs.
Recommended
Energy and Power Monitoring
Energy meters and submetering nodes use the NAFE13388 to digitize voltage-divider and current-transformer signals with 24-bit accuracy; four differential configurations map naturally to single-phase plus neutral or multi-circuit monitoring. The ±25 V rating allows direct connection to resistor-divided bus voltages, and AICOM referencing simplifies shared-common input topologies common in metering front ends. Integrated diagnostics support tamper and self-test detection increasingly required in smart-meter standards environments. At 150 mW the AFE fits both panel-mounted meters and DIN-rail submeters. Designers should verify converter timing against the metering standard's update-rate requirements and use the NXP datasheet's noise tables to confirm ENOB at the target sample rate before finalizing accuracy budgets.
Recommended
Recommended Products Summary
Engineering reference data for NAFE13388 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NAFE73388 |
|---|---|---|
| Package | 64-HVQFN (9x9 mm) | 64-HVQFN (9x9 mm) - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors |
| ADC Resolution | 24 bit | 16 bit |
| Input Channels | 8 (up to 4 differential) | 8 (up to 4 differential) |
| Input Voltage Range | ±25 V | ±25 V |
| Excitation Sources | Integrated | Integrated |
| Lifecycle Status | Active | Active |
Key Differentiators
- Direct ±25 V inputs remove external attenuation (vs Discrete PGA + ADC chains)
- Integrated excitation sources for resistive sensors (vs NAFE73388)
- Single-IC 8-channel consolidation (vs TI/ADI multichannel delta-sigma AFEs)
Design Notes
Although the NAFE13388 tolerates ±25 V directly at its HV analog input pins, PCB layout must still maintain appropriate creepage and clearance distances between the field-input nets and low-voltage digital circuitry per the end equipment's insulation requirements. Use a solid AGND plane under the AFE, keep the 64-HVQFN exposed pad soldered to a grounded thermal land with an adequate via array, and route the SPI clock away from the analog input traces to avoid digital coupling into the 24-bit converter front end.
Budget the 150 mW active consumption from the DigiKey listing for NAFE13388B40BSK, plus any excitation-source current delivered to external sensors such as RTDs. Estimated: at a 3.3 V analog supply, 150 mW implies roughly 45 mA average - verify your LDO thermal capability accordingly. For battery designs, duty-cycle conversions between samples to reduce average power well below the active figure, and consult the datasheet per-mode current tables for sleep and idle states.
Do not assume all NAFEx3388 family members are identical: NXP states the family differs in high-speed/low-power class, factory calibration, and 24-bit vs 16-bit ADC. Ordering the wrong suffix (for example a 16-bit or non-calibrated variant instead of NAFE13388B40BSK) will change system accuracy. Also, when switching multiplexer channels between conversions, allow the delta-sigma converter's full settling time per the NXP datasheet timing specification before latching a result, or channel-to-channel accuracy will degrade.
Compliance Information
Compliance details not present in the retrieved web data; verify RoHS/REACH status on the NXP product page for NAFE13388B40BS under Environmental Quality.
