NAFE73388 - 8-Input 24-bit High-Speed AFE | NXP Semiconductors
MPN: NAFE73388 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.8 | $78.00 |
| 100 | $6.95 | $695.00 |
| 500 | $6.3 | $3,150.00 |
| 1,000 | $5.75 | $5,750.00 |
NAFE73388 Overview
An analog front-end (AFE) is the circuit block that conditions and digitizes real-world sensor signals before they reach a digital processor. Within the signal-chain hierarchy, an AFE sits between physical sensors (voltage, current, temperature, resistance) and the MCU or DSP, performing amplification, filtering, high-voltage attenuation, and analog-to-digital conversion. The NAFEx3388 family from NXP integrates this entire chain into a single power-management-class IC.
Key features include eight low-leakage high-voltage analog inputs configurable as eight single-ended or four differential channels, a Β±25 V input range that eliminates external signal conditioning in many designs, integrated excitation sources for driving sensors such as RTDs and bridge transducers, and integrated diagnostic features for functional-safety-oriented designs. The 24-bit converter resolution supports high-precision measurement requirements.
Technically, the device integrates low-leakage HV fast-switch input structures with a configurable gain/attenuation path feeding a 24-bit sigma-delta-class converter, and is offered in factory-calibrated variants within the family (high-speed/low-power, calibrated/uncalibrated, 24/16-bit, 8/4-channel). Typical power consumption is around 160 mW per DigiKey listing for the HVQFN-64 package.
Typical applications include programmable logic controllers (PLC) analog input modules, building and process automation, condition monitoring, and multi-sensor test and measurement equipment where Β±25 V universal inputs save board area.
When designing, route high-voltage input nets with adequate creepage/clearance and decouple the excitation-source outputs to preserve accuracy.
This page synthesizes distributor pricing, family drop-in alternatives, and practical design guidance not found in the NXP datasheet alone.
Drop-in alternatives for NAFE73388 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
NAFE73388B40BS
β Drop-Inπ Reference alternative (not in catalog)
NAFE13388B40BSE
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
NAFE53388B40BSE
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
NAFE13388B40BS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
NAFE53388B40BS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
NAFE73388 Maximum Ratings & Electrical Characteristics
| Product Type | Universal 8-input high-speed analog front-end (AFE) |
| Number of Input Channels | 8 (single-ended) / 4 (differential) |
| Input Voltage Range | Β±25 V (high-voltage analog inputs) |
| ADC Resolution | 24 bit |
| Family | NAFEx3388 (high-speed variant) |
| Excitation Sources | Integrated |
| Diagnostics | Integrated diagnostic features |
| Power Consumption | 160 mW |
| Package | 64-HVQFN (9x9 mm) |
| Mounting Type | Surface Mount |
| Grade | Industrial |
| Input Configuration | External common AICOM or internal AGND reference |
| Order Code (DigiKey) | NAFE73388B40BSE |
NAFE73388 64-hvqfn (9x9 mm) Pin Configuration Guide
Pin configuration for NAFE73388 (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 NAFE73388.
Refer to the datasheet for full pin configuration.
Typical Applications
NAFE73388 is suitable for 6 applications: PLC Analog Input Modules, Condition Monitoring Systems, Building and Process Automation, Multi-Sensor Test and Measurement Equipment, Motor Drive and Inverter Sensing, Energy and Power Quality Monitoring.
PLC Analog Input Modules
The NAFE73388 fits programmable logic controller analog input cards because it accepts standard industrial signal ranges directly via its Β±25 V high-voltage inputs, eliminating the external attenuators, level shifters, and protection networks that discrete ADC solutions require. In an 8-channel module, one NAFE73388 replaces multiple conditioning amplifiers and a multiplexed converter, reducing BOM count and board area in the dense 64-HVQFN (9x9 mm) footprint. Configuring inputs as single-ended or differential adapts the same silicon to voltage-mode and current-loop field signals. The integrated diagnostics allow the module to detect broken sensors or out-of-range wiring at runtime, supporting industrial fault reporting. High-speed conversion enables fast module scan cycles so the PLC logic sees fresh process values every cycle even with all channels active.
Recommended
Condition Monitoring Systems
Vibration, temperature, and process sensors in motor and machinery condition-monitoring benefit from the NAFE73388's high-speed multi-channel scanning and 24-bit resolution, which resolve both small dynamic signals and slow DC drift simultaneously. The Β±25 V universal inputs tolerate the wide and sometimes fault-elevated voltage levels found near industrial drives, while integrated excitation sources power RTD and bridge-based vibration/temperature sensors without extra DACs or current sources. Capturing all channels in rapid succession preserves inter-channel phase relationships needed for bearing-fault frequency analysis. The roughly 160 mW operating power keeps self-heating low inside sealed monitoring enclosures. Diagnostic features flag open-wire or shorted-sensor conditions automatically, improving uptime of continuously running predictive-maintenance installations deployed across factory floors.
Recommended
Building and Process Automation
HVAC controllers, energy meters, and process automation I/O gather dozens of mixed sensor types; the NAFE73388 consolidates eight universal inputs into one IC, so a single analog architecture covers voltage sensors, RTDs, thermistors, and resistive actuators feedback. The Β±25 V input range directly accommodates 0-10 V and wide-swing building automation signaling without front-end scaling, and the integrated excitation sources drive resistive sensors with controlled current. High-speed scanning permits energy-metering channels to be sampled at rates adequate for power-quality observations. With 24-bit conversion, small sensor deltas are resolvable for fine control of dampers and valves. The industrial temperature-grade silicon and integrated diagnostics suit unattended installations where a failed input must be reported rather than silently corrupting control loops.
Recommended
Multi-Sensor Test and Measurement Equipment
Bench instruments, rack-mounted data loggers, and factory end-of-line testers need channels with different ranges and sensor types; the NAFE73388 addresses this with eight configurable inputs (up to four differential pairs) spanning Β±25 V, all converted at 24-bit resolution by a high-speed converter that keeps total acquisition time low across all channels. The integrated excitation sources simplify front-end design for resistive sensors under test, and the AICOM common-input option lets multiple signals share a reference node, simplifying fixturing. Because the family shares a register map, testers can swap NAFE73388 and NAFE13388 variants to trade speed for power without firmware redesign. Integrated diagnostics support self-test routines at instrument power-up, shortening production calibration and verification cycles.
Recommended
Motor Drive and Inverter Sensing
Motor-control systems require monitoring of DC bus voltage, phase currents via shunts or hall sensors, and temperature sensors, all within environments carrying high dv/dt transients; the NAFE73388's Β±25 V high-voltage tolerant inputs and low-leakage HV input structures provide robustness at the measurement node, while 24-bit resolution supports precision torque-relevant current sensing and thermal protection thresholds. Differential input configuration rejects common-mode noise from inverter switching when paired with appropriate filtering. High-speed conversion lets drive controllers sample bus and phase quantities within a PWM control period. Excitation sources cover NTC/RTD stator temperature sensing directly. Integrated diagnostics can detect sensor disconnection, allowing the drive to enter a safe state rather than acting on invalid feedback during faults.
Recommended
Energy and Power Quality Monitoring
Submetering and power-quality devices digitize voltage dividers and current-transformer outputs across multiple phases; the NAFE73388's four differential input pairs handle line-voltage-derived signals with common-mode rejection, while its Β±25 V input headroom covers brownout and surge conditions without clamping distortion. The 24-bit converter resolves the small signal range needed for accurate RMS and harmonic computations, and high-speed sampling supports harmonic analysis per monitoring standards. All phases can be scanned in rapid sequence so phase-angle calculations remain consistent across channels. The integrated excitation and diagnostics also support auxiliary resistive sensors such as panel temperature, which corrects measurement drift. The 64-HVQFN (9x9 mm) package with about 160 mW consumption suits sealed meter enclosures with limited airflow.
Recommended
Recommended Products Summary
Engineering reference data for NAFE73388 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NAFE73388B40BS | NAFE13388B40BSE | NAFE53388B40BSE | NAFE53388B40BS |
|---|---|---|---|---|---|
| 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 |
| Input Channels | 8 SE / 4 diff | 8 SE / 4 diff | 8 SE / 4 diff | 8 SE / 4 diff | 8 SE / 4 diff |
| Input Range | Β±25 V | Β±25 V | Β±25 V | Β±25 V | Β±25 V |
| ADC Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Speed Class | High-speed | High-speed | Low-power | Low-power | Low-power |
| Excitation Sources | Integrated | Integrated | Integrated | Integrated | Integrated |
| Power Consumption | 160 mW | 160 mW (high-speed) | Lower than high-speed variant | Lower than high-speed variant | Lower than high-speed variant |
Key Differentiators
- High-speed conversion class (vs NAFE13388B40BSE)
- Single-chip universal input integration (vs General-purpose 24-bit ADCs (no cross-brand drop-in))
- Footprint-compatible family scaling (vs NAFE53388B40BS)
Design Notes
The 64-HVQFN (9x9 mm) package has an exposed die paddle that must be soldered to a PCB thermal pad tied solidly to the ground plane. For 24-bit precision conversion, use a star or unified analog ground region under the device and keep high-voltage input traces away from the digital serial interface lines. Provide adequate creepage and clearance on the Β±25 V input nets per your product safety requirements, since these pins connect directly to field-level signals.
Budget approximately 160 mW for the NAFE73388 in high-speed operation (per DigiKey listing). Estimated: at a 3.3 V analog supply this equates to roughly 48 mA of continuous supply current, so verify the LDO or DC-DC feeding the AFE can source this plus margin, and account for this dissipation in sealed-enclosure thermal calculations. The low-power NAFE13388 family member is the drop-in choice when the thermal or supply budget cannot accommodate high-speed mode.
Do not assume the NAFE73388 includes factory calibration - the NAFEx3388 family spans calibrated and non-calibrated variants, and the calibration attribute is encoded in the orderable suffix. Verify the exact part number (e.g., NAFE73388B40BS vs family alternatives like NAFE53388) against the NXP comparison table before finalizing the BOM. Also confirm the excitation-source output current rating in the datasheet before driving low-resistance RTDs to avoid exceeding source limits.
Compliance Information
Compliance data was not present in the provided verified web data. Consult the NXP product page for NAFE73388B40BS for official RoHS/REACH declarations.
