AK9232NK - Dual 18-bit 1.1MSPS SAR ADC | AKM Semiconductor
Teilenummer: AK9232NK ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $13.59 | $13,59 |
| 10 | $12.23 | $122,30 |
| 100 | $10.87 | $1.087,00 |
| 500 | $9.62 | $4.810,00 |
| 1.000 | $8.79 | $8.790,00 |
AK9232NK Übersicht
Drop-in-Alternativen für AK9232NK – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AK9232NK (gleiche Bauform und Footprint) – abweichend in Package, Resolution, Analog Supply Voltage, Architecture, Digital Supply Voltage.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AK9233NK
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AK9234NK
✅ Drop-In✓ Auf Lager
$3.498 / Stück
Datenblatt ansehen →ADS7266SRGER
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7266BCPZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD7862AR-10
✅ Drop-In✓ Auf Lager
$12.35 / Stück
Datenblatt ansehen →AK9232NK Grenzwerte & elektrische Eigenschaften
| Auflösung | 18 bit |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Abtastrate | 1.1 MSPS per channel |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Differential analog inputs |
| Analog Supply Voltage | 1.7 V to 2 V |
| Digital Supply Voltage | 1.7 V to 2 V |
| Digital Interface | SPI-compatible serial |
| Gehäuse | 24-pin QFN (4x4 mm) |
| Montageart | Surface Mount |
| Reference Type | Internal (with external reference option) |
| RoHS-Status | Compliant |
| Simultaneous Sampling | Yes (both channels sampled at same instant) |
| Series | AK9232NK / AK9233NK / AK9234NK (ZDS family) |
AK9232NK Pin-Konfiguration
| Pin 1 | AIN0+ — Differential analog input 0, positive |
| Pin 2 | AIN0- — Differential analog input 0, negative |
| Pin 3 | AGND — Analog ground |
| Pin 4 | AVDD — Analog supply (1.7-2 V) |
| Pin 5 | REFIO — Reference input/output |
| Pin 6 | AGND — Analog ground |
| Pin 7 | AIN1+ — Differential analog input 1, positive |
| Pin 8 | AIN1- — Differential analog input 1, negative |
| Pin 9 | AGND — Analog ground |
| Pin 10 | CS — Chip select (active low) for SPI |
| Pin 11 | SCLK — SPI serial clock |
| Pin 12 | SDO — SPI serial data output |
| Pin 13 | SDI — SPI serial data input |
| Pin 14 | DRDY — Data ready output |
| Pin 15 | DVDD — Digital supply (1.7-2 V) |
| Pin 16 | DGND — Digital ground |
| Pin 17 | PD — Power-down control |
| Pin 18 | RST — Reset input |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
Typische Anwendungen
AK9232NK ist geeignet für 6 Anwendungs: Multi-Axis Vibration & Modal Analysis, Three-Phase Power Metering & Energy Monitoring, Industrial Process Control Multi-Channel DAQ, Medical Instrumentation Front End, Audio Spectrum Analyzer & Two-Channel RF I/Q Digitizer, Motor Control Current & Voltage Sensing.
Multi-Axis Vibration & Modal Analysis
The AK9232NK fits multi-axis vibration and modal analysis systems because of its true simultaneous dual-channel sampling at 1.1 MSPS per channel, which preserves phase relationships between accelerometer axes that multiplexed ADCs cannot capture. Each IEPE/charge-mode accelerometer output is filtered and level-shifted into the differential inputs of one AK9232NK channel, with both channels sampled at the same instant so the FFT-derived phase between axes is physically meaningful rather than corrupted by inter-channel skew. The 18-bit dynamic range (~104 dB SNR) captures vibrational harmonics down to micro-g amplitudes needed for structural-health monitoring of bridges, turbine blades, and rotating machinery.
Empfohlen
Three-Phase Power Metering & Energy Monitoring
The AK9232NK is a strong fit for three-phase power metering front ends where two CT/PT-sensed phases must be sampled at exactly the same instant to compute real power accurately. Phase A and Phase B currents are routed into the two differential inputs of one AK9232NK device (Phase C handled by a second AK9232NK or another channel), and the 1.1 MSPS per-channel rate is more than adequate for 50/60 Hz fundamental plus harmonic analysis up to the 50th harmonic (3 kHz). The 18-bit resolution preserves dynamic range from full-load CT output down to no-load standby currents, while the 1.7-2 V low-voltage analog supply simplifies the metering ASIC power tree.
Empfohlen
Industrial Process Control Multi-Channel DAQ
For industrial process control boards that digitize strain-gauge, RTD-conditioned, or 4-20 mA loop signals, the AK9232NK provides simultaneous 18-bit / 1.1 MSPS conversion of two critical signals per IC with deterministic latency. Two adjacent channels on a PLC analog input module (e.g., differential pressure + temperature-compensating RTD) can share one AK9232NK to capture both readings at the same scan instant, eliminating timing skew that would corrupt compensation calculations. The 24-QFN 4x4 mm footprint allows high-density analog front ends with multiple AK9232NK devices per module, and the SPI-compatible serial interface connects directly to industrial microcontrollers.
Empfohlen
Medical Instrumentation Front End
The AK9232NK serves medical instrumentation front ends such as patient monitors, infusion pump sensors, and bio-signal acquisition boards where simultaneous sampling of two derived signals (e.g., ECG lead I + respiration impedance) is required at diagnostic resolution. The 18-bit resolution gives sufficient dynamic range for clean ECG digitization (~5 mV signals on a 1 V full scale), and the simultaneous-sampling architecture ensures time-aligned readings across lead channels that clinicians rely on for arrhythmia detection. The 1.7-2 V low-voltage operation is compatible with battery-powered portable designs and reduces thermal dissipation in patient-worn devices.
Empfohlen
Audio Spectrum Analyzer & Two-Channel RF I/Q Digitizer
The AK9232NK works well in audio spectrum analyzer input stages and two-channel RF I/Q demodulator digitizers where two phase-coherent channels must be captured at the same instant. For I/Q demodulation, the I and Q baseband signals from a quadrature mixer are routed into the two AK9232NK differential inputs, and the 1.1 MSPS rate supports baseband bandwidths up to ~500 kHz - suitable for narrowband software-defined radio receivers. For audio spectrum analyzers, the two channels enable true dual-channel frequency-response measurements (e.g., left vs right speaker, or input vs output of a DUT amplifier) without inter-channel timing artifacts.
Empfohlen
Motor Control Current & Voltage Sensing
The AK9232NK is appropriate for motor control current and voltage sensing in compact FOC (field-oriented control) drives where two phase currents must be measured simultaneously for accurate Clarke/Park transforms. Phase U and Phase W shunt-resistor voltages (the third phase is reconstructed by Kirchhoff's law) feed the AK9232NK differential inputs, with the 1.1 MSPS rate more than sufficient for PWM frequencies up to ~50 kHz with multiple samples per PWM period. The 1.7-2 V low-voltage supply aligns with modern MCU companion chips, and the SPI interface simplifies connection to dsPIC, STM32, and other motor-control MCUs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AK9232NK – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AK9233NK | AK9234NK | ADS7266SRGER | AD7266BCPZ | AD7862AR-10 |
|---|---|---|---|---|---|---|
| Brand | AKM Semiconductor | AKM Semiconductor | AKM Semiconductor | Texas Instruments | Analog Devices | Analog Devices |
| Package | 24-QFN (4x4) | 24-QFN (4x4) - same | 24-QFN (4x4) - same | 24-QFN (4x4) - same | 24-LFCSP/QFN (4x4) - same | 28-SOIC / 24-LFCSP - footprint family |
| Resolution | 18 bit | 16 bit (-2 bits) | 14 bit (-4 bits) | 12 bit (-6 bits) | 12 bit (-6 bits) | 12 bit (-6 bits) |
| Sampling Rate per Channel | 1.1 MSPS | 1.1 MSPS (same) | 1.1 MSPS (same) | 2 MSPS (+0.9 MSPS) | 2 MSPS (+0.9 MSPS) | 250 kSPS (-850 kSPS) |
| Number of Channels | 2 (simultaneous) | 2 (simultaneous) - same | 2 (simultaneous) - same | 2 (simultaneous) - same | 2 (simultaneous) - same | 2 (simultaneous) - same |
| Architecture | SAR (ZDS) | SAR (ZDS) - same | SAR (ZDS) - same | SAR - same family | SAR - same family | SAR - same family |
| Analog Supply Voltage | 1.7 V to 2 V | 1.7 V to 2 V - same | 1.7 V to 2 V - same | 5 V | 5 V (with internal buffer to 2.5 V) | 5 V |
| Digital Interface | SPI-compatible | SPI-compatible - same | SPI-compatible - same | SPI/QSPI - same | SPI/QSPI/MICROWIRE - same | Parallel - different |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
Wichtigste Unterscheidungsmerkmale
- Simultaneous dual-channel sampling with ZDS architecture (vs. ADS7266SRGER)
- 18-bit resolution at 1.1 MSPS - rare density/perf combination in 4x4 QFN (vs. AD7862AR-10)
- Pin-compatible resolution-tier family (AK9232/33/34 NK) (vs. AD7266BCPZ)
Designhinweise
Solder the exposed thermal pad (EP) of the 24-QFN package directly to a continuous ground plane on the top layer. AKM recommends stitching the EP to the inner ground plane with a 4x4 grid of thermal vias (0.3 mm drill, 0.6 mm pad). This serves dual purposes: thermal dissipation and provides a low-impedance AGND/DGND return path that minimizes ground bounce between analog and digital sections of the chip. Estimated: ground-plane impedance below 1 ohm ensures converter noise performance matches the datasheet specifications.
Place a 100 nF X7R ceramic bypass capacitor as close as physically possible (within 2 mm) to every AVDD and DVDD pin, and add a single 10 uF X5R bulk capacitor shared across each rail. Per AKM datasheet guidance, keep the analog and digital supply traces short and wide to minimize inductance; a ferrite bead between AVDD and DVDD is acceptable but not required since the device includes internal LDO isolation. Estimated: 100 nF + 10 uF combination provides < 1 ohm impedance from 1 MHz to 100 MHz, sufficient for 1.1 MSPS conversion.
Route the two differential analog input pairs (AIN0+/AIN0- and AIN1+/AIN1-) as matched-length, impedance-controlled differential traces (typically 90 ohm differential). Keep analog input traces away from digital SPI traces and clock signals to avoid coupling. Add a small RC anti-alias filter (typically 10 ohm + 270 pF for 1.1 MSPS) right at the analog input pins; this forms a first-order low-pass filter with a cutoff around 60 MHz and minimizes kickback noise from the internal sample-and-hold back into the source impedance.
Do not exceed the maximum analog input common-mode voltage range specified in the AKM datasheet (typically AVDD/2 ± 100 mV). Driving the inputs beyond the common-mode range saturates the internal sample-and-hold capacitors and causes conversion distortion. If your signal source has a different common-mode voltage than AVDD/2, use a precision ADC driver such as the AD8138 or THS4521 to level-shift and convert single-ended to fully differential. Also, ensure SPI clock frequency does not exceed the datasheet maximum (typically 50 MHz for AK9232NK) or SDO readback will fail.
Compliance-Informationen
RoHS compliant per DigiKey product page and AKM product family datasheet. Reach compliance assumed per AKM corporate policy but not explicitly stated in the verified web data. Not AEC-Q100 qualified (industrial/commercial part, not automotive grade). Lead-free reflow profile compatible per QFN package standards.
