NAFE11348B40BS - 8-Channel 16-Bit ±25V AFE | NXP Semiconductors
MPN: NAFE11348B40BS ✓ Active| Qty | Unit Price | Extended |
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| 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 and digitizes real-world analog signals before they reach a digital processing unit. Within the signal-chain hierarchy, an AFE sits between field sensors or voltage/current sources and the system MCU or DSP, performing amplification, attenuation, filtering, and analog-to-digital conversion. AFEs are a subclass of data converter and precision signal-chain ICs within power and measurement system design.
Key features include 8 universal input channels that accept voltage, current, and resistive sensor signals without external conditioning circuitry, a wide ±25 V input tolerance that protects against industrial transients, 16-bit conversion resolution suitable for high-precision measurement, and low power operation of 125 mW. The universal input architecture eliminates the need for discrete per-channel conditioning, reducing BOM cost and board area.
The NAFE11348 belongs to the NAFEx1388 family, which also includes the 24-bit NAFE11388 and NAFE71388 variants. This family integration of low-leakage, high-voltage input structures enables direct connection to industrial field signals, supporting multiple input configurations per channel that are software-selectable at runtime.
Typical applications include programmable logic controller (PLC) analog input modules, industrial process control and data acquisition systems, building automation, battery test equipment, and protection relays where ±25 V robustness and multi-channel universal inputs are required.
Design consideration: because the device tolerates signals up to ±25 V directly, input protection strategy can be simplified, but PCB creepage and clearance for HV pins must still be respected in the 9x9 mm HVQFN layout.
This page synthesizes distributor availability data, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
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, Product Type, Grade, Package, ADC Resolution.
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 →NAFE11348B40BSE
✅ Drop-In📋 Reference alternative (not in catalog)
NAFE11348B40BSMP
✅ Drop-In📋 Reference alternative (not in catalog)
NAFE11388B40BSE
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
NAFE11348B40BS Maximum Ratings & Electrical Characteristics
| Product Type | Analog Front End (AFE) |
| Number of Channels | 8 universal input channels |
| Input Type | Universal (voltage / current / resistive sensor) |
| Input Voltage Range | ±25 V |
| Resolution | 16 bit |
| Power Consumption | 125 mW |
| Package | 64-HVQFN (9x9 mm) |
| Mounting Type | Surface Mount |
| Grade | Industrial |
| Family | NAFEx1388 (NAFE11388 / NAFE11348 / NAFE71388) |
| Input Leakage | Low-leakage high-voltage inputs (value per datasheet) |
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: PLC Analog Input Modules, Industrial Process Control and Data Acquisition, Battery Test and Formation Equipment, Building Automation and HVAC Monitoring, Protection Relays and Power Quality Monitoring, Laboratory Test and Measurement Instruments.
PLC Analog Input Modules
Programmable logic controller analog input cards are the flagship application for the NAFE11348. Each of the 8 universal input channels can be software-configured for voltage (±10 V class), current (4-20 mA with shunt), or resistive sensor inputs, allowing one AFE to replace multiple discrete conditioning channels. The ±25 V input tolerance survives field miswiring and inductive transients at terminal blocks, a common failure point in industrial I/O. The 16-bit resolution meets 0.1%-class module accuracy targets, while the 125 mW consumption keeps multi-card backplane thermal budgets manageable. Using the NAFE11348 reduces BOM count, calibration effort, and board area versus discrete per-channel signal chains, and the same footprint supports the 24-bit NAFE11388 for premium-tier modules.
Recommended
Industrial Process Control and Data Acquisition
In process control systems measuring pressure, temperature, flow, and level transmitters, the NAFE11348 digitizes up to 8 field signals per device with 16-bit accuracy. Universal inputs handle thermocouples, RTDs, and current-loop transmitters without external multiplexers. The low-leakage, high-voltage input structures maintain accuracy despite the common-mode conditions typical of distributed I/O, and the ±25 V rating protects against surge conditions between instrument loops. Because channel configuration is software-selectable at runtime, one hardware design supports multiple transmitter types, simplifying product variants. The device's industrial grade supports extended temperature deployment in control cabinets, and the 9x9 mm HVQFN keeps channel density high on multi-board DAQ systems.
Recommended
Battery Test and Formation Equipment
Battery cycling and formation testers require many channels of accurate voltage and current measurement. The NAFE11348 provides 8 channels per AFE with 16-bit resolution and low input leakage, enabling dense channel arrays in battery test racks. The ±25 V input range covers single-cell and small multi-cell pack measurements with margin for overvoltage events during fault testing, protecting the front-end without elaborate per-channel clamps. Low 125 mW power reduces heat buildup in enclosed test fixtures, improving measurement drift over long soak tests. Software-configurable input ranges let one instrument hardware platform serve coin-cell R&D and larger prismatic cell production, and the drop-in 24-bit NAFE11388 option serves metrology-grade cell characterization lines.
Recommended
Building Automation and HVAC Monitoring
Building management systems monitor diverse sensor types - temperature RTDs, humidity transmitters, 0-10 V actuators, and 4-20 mA loop devices. The NAFE11348's universal input architecture matches this mixed-signal reality: each of the 8 channels configures independently for the sensor type wired to the terminal, eliminating hardware variants per building zone. The ±25 V tolerance handles surge events from HVAC motor contactors sharing conduit with signal wiring, improving field reliability. With 16-bit resolution, the device captures the accuracy class of standard building sensors, and 125 mW consumption suits the always-on duty cycle of BMS controllers where standby power matters. The single-chip approach also cuts calibration cost across high-volume controller production.
Recommended
Protection Relays and Power Quality Monitoring
Protection relays and power quality analyzers digitize voltage and current signals from instrument transformers and divider networks. The NAFE11348's ±25 V input rating directly accepts scaled secondary signals from PT and CT conditioning circuits with substantial headroom, and its low-leakage inputs preserve ratio accuracy across channels - important for phase-accurate multi-channel power calculations. Eight synchronized-configurable channels per device let one AFE cover three-phase voltage and current sets with spares. The 16-bit resolution supports the metering accuracy classes required in distribution monitoring, while the robust front end survives the transient-rich environment near switchgear. The HVQFN-64 package supports the compact form factor of modern feeder relays and power quality recorders.
Recommended
Laboratory Test and Measurement Instruments
Bench data loggers, modular instruments, and automated test equipment benefit from the NAFE11348's combination of universal inputs and ±25 V robustness. Probe front ends feeding the AFE can be simple because the device tolerates wide input swings, reducing external protection design effort. The 16-bit converter delivers the resolution expected in modern loggers, and runtime reconfiguration supports instruments that switch between voltage, current, and resistive measurement modes. At 125 mW, thermal drift in enclosed benchtop enclosures stays low, supporting stable long-duration logging. Instrument makers can offer an accuracy-tiered product line by populating the same 64-HVQFN footprint with either the NAFE11348 (16-bit) or the pin-compatible 24-bit NAFE11388, amortizing one PCB design across tiers.
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 | NAFE11348B40BSE | NAFE11348B40BSMP |
|---|---|---|---|---|---|
| Package | 64-HVQFN (9x9 mm) | 64-HVQFN (9x9 mm) - same | 64-HVQFN (9x9 mm) - same | 64-HVQFN (9x9 mm) - same | 64-HVQFN (9x9 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Resolution | 16 bit | 24 bit | 24 bit | 16 bit | 16 bit |
| Channels | 8 universal input | 8 universal input | 8 universal input | 8 universal input | 8 universal input |
| Input Voltage Range | ±25 V | ±25 V | ±25 V | ±25 V | ±25 V |
| Grade | Industrial | Industrial | Higher-grade family variant | Industrial | Industrial |
| Best Use Case | Cost-optimized 16-bit industrial I/O | Precision 24-bit measurement | High-grade 24-bit designs | Same, distributor-stock variant | Same, module-pack variant |
Key Differentiators
- Lower cost per channel at 16-bit accuracy (vs NAFE11388B40BS)
- Universal input eliminates per-channel conditioning (vs NAFE11348B40BSMP)
- Trade-off: lower resolution than family flagship (vs NAFE71388B40BS)
Design Notes
The ±25 V input tolerance means the AFE survives overvoltage, but it does not license unlimited abuse: verify that worst-case field surges beyond ±25 V are still clamped externally (TVS or series R) at terminal blocks. Also remember the part tolerates ±25 V at the inputs, not on its supply pins - never route field wiring directly to the supply rail. Consult the NAFEx1388 datasheet absolute maximum ratings table before finalizing input protection values.
The 64-HVQFN 9x9 mm package has a center exposed pad that must be soldered to a grounded copper pour for both electrical return and heat dissipation of the 125 mW dissipation. Design the land pattern per NXP HVQFN-64 recommendations, place decoupling capacitors on each supply pin within 2 mm of the pin, and route high-voltage input traces with adequate creepage since ±25 V field signals enter the same footprint as low-voltage digital lines.
Estimated: at 125 mW typical power consumption in a 64-HVQFN (9x9 mm) with a solid ground pour, junction temperature rise above ambient is modest (typically under 10-20 C depending on board thermal resistance), so natural convection is generally sufficient in industrial controller enclosures. Verify with the datasheet theta_JA figure for your stack-up if the device is deployed in sealed enclosures above 85 C ambient.
Keep analog input traces short and symmetric per channel pair, and isolate them from digital bus routing (SPI/host interface) to prevent digital coupling into the 16-bit measurement path. A solid unbroken ground plane beneath the AFE, with the exposed pad stitched to it, gives the cleanest reference. For multi-AFE designs, star-route or daisy-chain the digital bus and give each device its own local supply decoupling.
Compliance Information
Compliance status not stated in the verified web data; industrial-grade AFE family per NXP. Confirm RoHS/REACH status on the NXP product page before design-in.
