NAFE11388B40BS - ±25V 8-Input 24-Bit Universal AFE | NXP
MPN: NAFE11388B40BS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.9 | $7,900.00 |
NAFE11388B40BS Overview
An analog front-end (AFE) is the signal-conditioning stage that sits between real-world sensors or voltage/current signals and a digital processing unit. Within the measurement hierarchy, the AFE -> signal conditioning IC -> data acquisition system -> industrial control chain depends on the AFE to amplify, filter, multiplex, and digitize raw analog signals with high precision. Universal-input AFEs like the NAFE11388 replace dozens of discrete components previously needed to handle mixed voltage, current, and thermocouple inputs.
Key features include eight low-leakage high-voltage (HV) fast multiplexed inputs rated for ±25 V, a 24-bit delta-sigma ADC with selectable 16/24-bit resolution, an integrated low-offset low-drift PGA with multiple gain settings, and an internal low-drift voltage reference. The HV input pins are internally diode-protected for EMC robustness and miswiring scenarios, a major reliability advantage in industrial field environments.
Architecturally, the device combines fast HV multiplexers with a high-data-rate delta-sigma converter, allowing sequential sampling of multiple channels while maintaining precision. The low-drift reference and PGA preserve accuracy over temperature, targeting industrial-grade measurement requirements without external calibration circuitry in many designs.
Typical applications include programmable logic controllers (PLC) analog input modules, building and process automation I/O, battery test and formation equipment, and condition-monitoring systems requiring multi-channel voltage and current measurement.
When designing with the NAFE11388B40BS, provide a clean low-noise supply and follow the datasheet decoupling guidance; the delta-sigma ADC resolution is only realized with careful layout around the reference and analog inputs.
This page synthesizes distributor availability, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for NAFE11388B40BS — 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 NAFE11388B40BS (same form factor and footprint) — differing in Input Voltage Range, Package, Product Type, Grade, Power Consumption.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NAFE11388B40BSE
✅ Drop-In📋 Reference alternative (not in catalog)
NAFE11388S40BS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
NAFE11388S40BSE
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
NAFE13388B40BS
✅ Drop-In📋 Reference alternative (not in catalog)
NAFE11388B40BS Maximum Ratings & Electrical Characteristics
| Product Type | Universal 8-input analog front-end (AFE) |
| Input Voltage Range | ±25 V (HV inputs) |
| Number of Input Channels | 8 (multiplexed, HV fast mux) |
| ADC Resolution | 24-bit delta-sigma (16-bit mode selectable) |
| ADC Type | Delta-Sigma |
| PGA | Integrated low-offset, low-drift programmable gain amplifier |
| Voltage Reference | Integrated low-drift voltage reference |
| Power Consumption | 125 mW |
| Input Protection | Internal diode protection on HV input pins (EMC/miswiring) |
| Package | HVQFN-64 (9x9 mm) |
| Mounting Type | Surface Mount |
| Grade | Industrial |
NAFE11388B40BS hvqfn-64 (9x9 mm) Pin Configuration Guide
Pin configuration for NAFE11388B40BS (hvqfn-64 (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 NAFE11388B40BS.
Refer to the datasheet for full pin configuration.
Typical Applications
NAFE11388B40BS is suitable for 6 applications: PLC Analog Input Modules, Battery Test and Formation Equipment, Building and Process Automation I/O, Condition Monitoring and Predictive Maintenance, Test and Measurement Instrumentation, Energy Monitoring and Smart Grid Sensors.
PLC Analog Input Modules
The NAFE11388B40BS fits programmable logic controller analog input cards because its ±25 V universal inputs and 8-channel HV multiplexer cover the standard industrial signal ranges (-10 V to +10 V, 0-20 mA with external shunt) from a single device. The 24-bit delta-sigma ADC with integrated low-drift PGA delivers the resolution PLC modules require without external amplification stages, while the internally diode-protected HV pins survive field miswiring and EMC surges that routinely destroy discrete front ends. Placed behind channel terminal conditioning, one NAFE11388B40BS replaces a mux + PGA + reference + ADC chain, cutting BOM count and factory calibration points while the 125 mW budget keeps module thermal rise low in densely packed I/O racks.
Recommended
Battery Test and Formation Equipment
In battery cell testing and formation channels, the NAFE11388B40BS measures cell voltages up to ±25 V with 24-bit precision across many parallel channels, thanks to its multiplexed 8-input HV front end. The low-offset, low-drift PGA preserves measurement accuracy over long soak times and elevated ambient temperatures, which directly affects capacity-derivation accuracy. Its 125 mW consumption matters when hundreds of measurement channels share a cabinet, avoiding self-heating drift. The diode-protected inputs tolerate reverse-connection events common in production fixtures. Combined with a precision shunt and a separate current-sense path, one device forms the core of a cost-effective per-cell voltage monitor within a formation-board data-acquisition chain.
Recommended
Building and Process Automation I/O
Building management and process automation systems gather dozens of mixed sensors - thermocouples, resistive bridges, 0-10 V transmitters - and the NAFE11388B40BS unifies them behind one universal ±25 V input stage. The 16/24-bit selectable delta-sigma ADC lets designers trade speed for resolution per channel group, while the integrated low-drift reference removes an external precision reference from the loop-verified BOM. Its HV mux switching speed is adequate for scanning slow physical processes at typical automation sample rates. The internally protected inputs handle technician wiring errors gracefully, a decisive advantage in field-deployed I/O modules where service access is costly and downtime must be minimized over multi-year installation lifetimes.
Recommended
Condition Monitoring and Predictive Maintenance
Vibration, temperature, and process-sensor signals in industrial condition-monitoring nodes benefit from the NAFE11388B40BS combination of low noise, 24-bit resolution, and ±25 V input tolerance. The low-drift PGA and reference ensure that slow-drifting sensor baselines are captured accurately over months between calibrations, while the multiplexed inputs let one AFE serve multiple sensors, shrinking remote-node PCB area and power draw. At 125 mW, the device suits passively cooled or battery-buffered monitoring nodes. The diode-protected HV inputs add resilience in electrically noisy motor-cabinet environments, where induced surges on long sensor cables would otherwise require discrete TVS and clamp networks in front of the converter.
Recommended
Test and Measurement Instrumentation
Bench and rack instrumentation - DMM front ends, data loggers, automated test fixtures - can use the NAFE11388B40BS as a compact multichannel measurement core. Its ±25 V input rating covers common measurement ranges directly, and the 24-bit delta-sigma ADC supplies the resolution class expected in precision instruments, while the integrated low-drift reference supports long-term accuracy without frequent recalibration. The fast HV multiplexer enables channel-scanning across eight inputs with microsecond-class settling depending on configuration, and the diode-protected inputs protect the instrument when users probe live circuits. This integration shortens instrument development cycles by removing discrete analog chain design, protection, and per-unit calibration complexity.
Recommended
Energy Monitoring and Smart Grid Sensors
Panel-level energy meters and grid-quality sensors measure bus voltages and shunt-derived currents that the NAFE11388B40BS accommodates natively within its ±25 V HV input window, with resistor scaling for higher rails. The 24-bit delta-sigma converter provides the dynamic range needed to extract small current signals from large common-mode voltages, and the low-drift reference maintains metering accuracy across seasonal temperature swings. Multi-channel multiplexing lets one device monitor three-phase nodes plus neutral and auxiliary channels. Its 125 mW draw suits always-on metering, and the internally protected inputs add the surge tolerance metering standards expect at the front end of field-installed equipment.
Recommended
Recommended Products Summary
Engineering reference data for NAFE11388B40BS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NAFE11388B40BSE | NAFE11388S40BS | NAFE13388B40BS |
|---|---|---|---|---|
| Package | HVQFN-64 (9x9 mm) | HVQFN-64 (9x9 mm) - same | HVQFN-64 (9x9 mm) - same | HVQFN-64 (9x9 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Input Voltage Range | ±25 V | ±25 V | ±25 V | ±25 V |
| Input Channels | 8 (HV mux) | 8 (HV mux) | 8 (HV mux) | 8 (HV mux) |
| ADC Resolution | 24-bit (16-bit selectable) | 24-bit (16-bit selectable) | 24-bit (16-bit selectable) | 24-bit (16-bit selectable) |
| Family Class | Low Power AFE | Low Power AFE | Low Power AFE | High Speed AFE |
| Serial Interface | B-suffix interface | B-suffix interface | S-suffix interface (different) | B-suffix interface |
Key Differentiators
- Low-power family efficiency (vs NAFE13388B40BS)
- Integrated ±25 V diode-protected HV inputs (vs Discrete mux+PGA+ADC chain)
- Same-footprint family coverage (vs NAFE11388S40BS)
Design Notes
Give the HVQFN-64 exposed pad a solid ground via array on the PCB land pattern to achieve the datasheet thermal and noise performance. Route the eight HV analog inputs with generous spacing and guard them against adjacent digital traces; the ±25 V rating presumes clean creepage/clearance at the connector and trace level. Place the 100 nF decoupling capacitors within 2 mm of the supply pins and one bulk capacitor (10 uF) near the device. Consult the NAFE11388 datasheet layout section for the reference decoupling network.
At approximately 125 mW the NAFE11388B40BS itself is thermally trivial, but the analog supply quality directly gates the 24-bit ADC performance: feed it from a low-noise LDO (e.g., a TLE42764-class regulator) rather than a switching rail, or add a ferrite plus capacitors between a buck converter and the AVDD pin. Estimated: at 3.3 V supply this is roughly 38 mA average current, so regulator dropout and sequencing margins are modest but should still be checked against the datasheet supply ranges.
Confirm the orderable-suffix meaning before substituting within the NAFE family: the B and S suffixes denote different interface configurations, and 11388 (low power) vs 13388 (high speed) differ in data rate and power. Mixing these on one footprint without a firmware review causes communication failures. Also remember the internal diode protection on the ±25 V HV pins is for fault robustness, not continuous overvoltage operation - design the signal chain so normal-mode inputs stay within the rated window per the NXP datasheet absolute maximum section.
Compliance Information
Verified web data does not explicitly state RoHS/REACH/lead-free status for NAFE11388B40BS. Verify on the official NXP product page or request an NXP material declaration before compliance-audited production. Industrial-grade (not automotive AEC-Q100) per datasheet positioning.
