NAFE11348B40BS - 8-Ch ±25V Universal Input AFE | NXP
MPN: NAFE11348B40BS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
NAFE11348B40BS Overview
An analog front-end (AFE) is the circuit block that conditions real-world analog signals - voltages, currents, resistances - before digitization, sitting between field sensors and a digital controller in the signal-chain hierarchy: sensor -> AFE (mux + PGA + ADC) -> MCU/gateway. Universal-input AFEs replace large arrays of discrete amplifiers, dividers, and filters in industrial measurement systems.
Key features include 8 universal analog input channels accepting voltage, current, and resistive sensor signals up to ±25 V; low-leakage high-voltage input structure that reduces external signal-conditioning components; programmable gain and data-rate settings for precision-versus-speed trade-offs; and industrial operating ratings suited to harsh electrical environments. The device integrates SPI-based digital control for channel sequencing and configuration.
Architecturally, the NAFE11348 combines a high-voltage input multiplexer with a low-noise PGA and a delta-sigma-class conversion core, allowing each channel to be independently configured for range, gain, and conversion rate. This per-channel configurability enables mixed signal types - thermocouples, RTDs, 4-20 mA loops, and high-voltage DC measurements - on one device. The NAFE11348 is optimized for low power (DigiKey lists 125 mW for the family), while the sibling NAFE11388 targets high-speed acquisition.
Typical applications include industrial data acquisition (DAQ) modules, PLC analog input cards, battery management and test systems, energy meters, and building/process automation front ends where many heterogeneous sensors must be measured accurately at low cost per channel.
Design consideration: because inputs tolerate ±25 V, designers should still observe channel sequencing and common-mode limits at power-up, and use solid ground references to exploit the low-leakage inputs for precision measurements.
This page synthesizes distributor listings, family cross-references, and drop-in alternative analysis for the NAFEx1388 family - information not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for NAFE11348B40BS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with NAFE11348B40BS (same form factor and footprint) — differing in Input Voltage Range, Package, Power Consumption, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NAFE11388B40BS
✅ Drop-In✓ In Stock
$7.9 / Unit
View Datasheet →NAFE71388B40BS
✅ Drop-In✓ In Stock
$11.05 / Unit
View Datasheet →NAFE11348B40BS Maximum Ratings & Electrical Characteristics
| Product Type | Universal Input Analog Front-End (AFE) |
| Number of Channels | 8 universal inputs |
| Input Voltage Range | ±25 V (universal input) |
| Resolution | 16 bit to 24 bit (configurable, per family datasheet) |
| Package | 64-HVQFN, 9x9 mm |
| Mounting Type | Surface Mount |
| Power Consumption | 125 mW (per DigiKey family listing) |
| Input Structure | Low-leakage high-voltage multiplexed inputs |
| Amplifier | Integrated programmable gain amplifier (PGA) |
| Digital Interface | SPI (configuration and data readout) |
| Channel Configuration | Independent per-channel gain, range and data rate |
| Family | NAFE11388 / NAFE11348 / NAFE71388 |
| Grade | Industrial |
NAFE11348B40BS 64-hvqfn, 9x9 mm Pin Configuration Guide
Pin configuration for NAFE11348B40BS (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 NAFE11348B40BS.
Refer to the datasheet for full pin configuration.
Typical Applications
NAFE11348B40BS is suitable for 6 applications: Industrial Data Acquisition (DAQ) Modules, PLC Analog Input Cards, Battery Management and Battery Test Systems, Energy Meters and Power Quality Monitoring, Building and Process Automation Sensing, Test and Measurement Instrumentation.
Industrial Data Acquisition (DAQ) Modules
The NAFE11348 fits industrial DAQ modules because its 8 universal inputs rated to ±25 V accept most field signals directly, and its configurable resolution (up to 24 bits) meets the 16-bit-class accuracy that industrial measurement demands. The low-leakage high-voltage input structure preserves accuracy on high-impedance sources, while per-channel gain and data-rate programming lets one board serve voltage, current, and resistive sensors. In a typical design the NAFE11348 sits between terminal blocks and an MCU, sequenced over SPI; unlike discrete front ends, it removes dozens of op-amps and dividers, cutting BOM cost and calibration effort while consuming about 125 mW.
Recommended
PLC Analog Input Cards
Programmable logic controller analog input cards need to accept heterogeneous signals - 4-20 mA loops, ±10 V signals, RTDs - on the same card. The NAFE11348 addresses this with 8 universal ±25 V inputs and independent per-channel configuration of gain, range, and conversion rate, so a single AFE replaces the mixed discrete front ends historically used. Its industrial grade rating suits the electrically noisy cabinet environment, and the 64-HVQFN (9x9 mm) package keeps channel density high on standard Eurocard formats. Because the device is multiplexed, channel crosstalk and settling should be characterized at the selected conversion rate when card scan times are specified.
Recommended
Battery Management and Battery Test Systems
Battery formation, cycling, and BMS characterization systems measure many cell voltages and currents precisely. The NAFE11348's ±25 V input range covers single-cell through multi-cell module measurements directly, and its low-leakage inputs prevent drain-induced measurement error on high-impedance sense points. With configurable resolution up to 24 bits, it resolves microvolt-level cell imbalances, while the 125 mW class power consumption limits self-heating in thermally sensitive battery fixtures. Channel sequencing over SPI allows synchronized multipoint scans; designers should verify multiplexer settling time against the required scan rate for the cell count in the stack.
Recommended
Energy Meters and Power Quality Monitoring
Energy meters and power-quality analyzers require simultaneous measurement of voltage and current channels with high linearity. The NAFE11348's 8 universal inputs let voltage dividers and current-sense signals share one device, and its programmable gain accommodates both high-voltage AC inputs and small shunt signals. The ±25 V absolute input tolerance also adds robustness against surges common in metering environments. In a typical metering front end, the AFE feeds samples to an MCU performing RMS and harmonic computation; the low-power NAFE11348 is particularly suited to always-on sub-metering where thermal budget and quiescent losses are regulated.
Recommended
Building and Process Automation Sensing
Building management and process automation nodes aggregate temperature (RTD/thermocouple), pressure (bridge sensors), and current loop signals. The NAFE11348's universal inputs and integrated PGA remove the need for separate signal-conditioning chips per sensor type, shrinking sensor-node PCB area. Its low-leakage high-voltage inputs maintain accuracy with the long cable runs typical of building installations, and its industrial rating supports wide ambient conditions. Data is streamed over SPI to the node controller; because the part is multiplexed, the node firmware should schedule sensor conversions to respect settling requirements while meeting the building automation scan cycle.
Recommended
Test and Measurement Instrumentation
Bench and rack instrumentation - multimeter front ends, sensor simulators, and automated test equipment - benefit from the NAFE11348's combination of ±25 V universal inputs and configurable high resolution. A single device provides eight software-configurable measurement channels, enabling compact multichannel instruments without per-channel analog redesign. Compared with the high-speed NAFE11388, the low-power NAFE11348 suits instruments where accuracy outweighs sample rate, such as precision DC logging. Instrument designers should implement system-level calibration routines leveraging the device's gain and range settings, and verify noise performance at the chosen conversion rate in the target bandwidth.
Recommended
Recommended Products Summary
Engineering reference data for NAFE11348B40BS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NAFE11388B40BS | NAFE71388B40BS |
|---|---|---|---|
| Package | 64-HVQFN (9x9 mm) | 64-HVQFN (9x9 mm) - same | 64-HVQFN (9x9 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Channels | 8 universal inputs | 8 universal inputs | 8 universal inputs |
| Input Range | ±25 V | ±25 V | ±25 V |
| Optimization | Low power | High speed | Feature variant |
| Resolution | Configurable, up to 24 bit | Configurable, up to 24 bit | Configurable, up to 24 bit |
Key Differentiators
- Low-power optimization within the family (vs NAFE11388B40BS)
- Universal ±25 V inputs reduce external components (vs NAFE71388B40BS)
- Trade-off: lower throughput than the high-speed sibling (vs NAFE11388B40BS)
Design Notes
Although the NAFE11348 inputs tolerate ±25 V, this is an operating rating, not surge protection. Industrial field wiring can still exceed it during faults or transients, so add external series resistance and TVS clamping on lines connected to long cables. Also remember the inputs are multiplexed: when switching channels, allow the PGA and sampling capacitor to settle before trusting the first conversion - discard or extend the first sample after each mux switch, especially at higher gain settings.
The 64-HVQFN (9x9 mm) leadless package requires a well-defined land pattern with via-array connection of the exposed pad to a ground plane for thermal and electrical performance. Keep the analog input traces short and symmetric, guard high-impedance sense lines with ground pour to limit leakage-induced error, and segregate the SPI digital lines from analog routing. Place decoupling capacitors directly at the supply pins per the NXP datasheet layout recommendations.
The NAFE11348 is the low-power member of the NAFEx1388 family (about 125 mW per DigiKey family listing), which limits self-heating in sealed enclosures. Estimated: even at 150 mW dissipation, with a typical HVQFN-64 junction-to-ambient thermal resistance, the junction rise is modest, but verify the exact theta_JA in the datasheet against your enclosure ambient before finalizing derating. If throughput demands later push you to the NAFE11388, re-check the power budget since its high-speed mode consumes more.
Compliance Information
Compliance status not stated in the provided verified web data; consult the NXP product page for RoHS/REACH certificates.
