NAFE11348B40BS - 8-Ch ±25V Universal Input AFE | NXP
MPN： NAFE11348B40BS ✓ 啟用中NAFE11348B40BS 概覽
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.
直接替換替代品，適用於 NAFE11348B40BS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： NAFE11348B40BS （相同外形與佔位） — 差異在於 Input Voltage Range, Package, Grade, Product Type, ADC Resolution.
NAFE11388B40BS
✅ 直接替換聯絡詢價
查看資料表 →NAFE71388B40BS
✅ 直接替換聯絡詢價
查看資料表 →NAFE11348B40BS 最大額定值與電氣特性
| Product Type | Universal Input Analog Front-End (AFE) |
| Number of Channels | 8 universal inputs |
| 輸入電壓範圍 | ±25 V (universal input) |
| 解析度 | 16 bit to 24 bit (configurable, per family datasheet) |
| 封裝 | 64-HVQFN, 9x9 mm |
| 安裝類型 | 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 腳位配置指南
NAFE11348B40BS（64-hvqfn, 9x9 mm 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： NAFE11348B40BS.
請參閱 資料表 以查看完整腳位配置。
典型應用
NAFE11348B40BS 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 NAFE11348B40BS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Low-power optimization within the family (對比NAFE11388B40BS)
- Universal ±25 V inputs reduce external components (對比NAFE71388B40BS)
- Trade-off: lower throughput than the high-speed sibling (對比NAFE11388B40BS)
設計說明
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.
合規資訊
Compliance status not stated in the provided verified web data; consult the NXP product page for RoHS/REACH certificates.
