ATSAML22N16A-AUT - 32MHz Cortex-M0+ 64KB Flash MCU | Microchip
Teilenummer: ATSAML22N16A-AUT ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.43 | $4,43 |
| 10 | $3.98 | $39,80 |
| 100 | $3.55 | $355,00 |
| 500 | $3.18 | $1.590,00 |
| 1.000 | $2.85 | $2.850,00 |
ATSAML22N16A-AUT Übersicht
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program storage and SRAM for runtime data), and a rich set of peripherals on one die. The SAM L22N belongs to the Cortex-M0+ class - the most energy-efficient ARM core for embedded workloads - paired with Microchip's proprietary ultra-low-power peripherals such as the AFE (Analog Front End) for sensor readout. The active-mode current of 39 µA/MHz (running CoreMark) and the 490 nA ultra-low-power backup mode with RTC place the part firmly in the 'always-on, coin-cell-friendly' tier of MCUs.
Key features include integrated SLCD (segment LCD) driver for up to 320 segments (8 com x 40 seg, or 4 com x 44 seg), Cortex-M0+ core with 2.14 CoreMark/MHz, 12-bit ADC with hardware averaging, 12-bit DAC, 16-bit timers (TC), SERCOM (configurable USART/SPI/I2C) channels, and a battery-backed RTC domain that retains state down to 490 nA.
The SAM L22N family uses a Harvard-bus architecture with single-cycle 32x32 hardware multiply, deterministic 2-stage pipeline, and a Nested Vectored Interrupt Controller (NVIC). The integrated AFE includes a 24-bit sigma-delta front end and a 12-bit SAR ADC, enabling direct sensor readout without external signal-conditioning ICs. The wide 1.6V-3.6V VDD range supports direct connection to single-cell Li-ion, 3V coin cells, and 2xAA stacks without external regulation.
Typical applications include smart electricity/water/gas meters with LCD, fitness bands and wearable medical devices with segment displays, battery-powered industrial sensor nodes, electronic shelf labels, and home automation keypads with LCD readouts. The 320-segment LCD capability differentiates it from generic Cortex-M0+ MCUs that require an external LCD driver.
Designers should evaluate wake-up source mapping (RTC, external interrupt, ADC window comparator) when targeting deep-sleep battery life, and reserve adequate Flash for the bootloader if OTA updates are required (64KB is sufficient for typical Cortex-M0+ application code but tight for full USB stacks).
This page synthesizes distributor pricing, same-family drop-in variants, AEC-Q100 alternative grades, and practical low-power design notes that go beyond the manufacturer datasheet's parametric tables.
Drop-in-Alternativen für ATSAML22N16A-AUT – 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 ATSAML22N16A-AUT (gleiche Bauform und Footprint) – abweichend in ADC, DAC, Package, USB Interface, Mounting Type.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ATSAML22N17A-AUT
✅ Drop-In✓ Auf Lager
$3.75 / Stück
Datenblatt ansehen →ATSAML22N18A-AUT
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ATSAML22N16A-CFUT
✅ Drop-In✓ Auf Lager
$2.65 / Stück
Datenblatt ansehen →ATSAML22J16A-AUT
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
ATSAML21J17B-AUT
✅ Drop-In✓ Auf Lager
$2.98 / Stück
Datenblatt ansehen →ATSAML22N16A-AUT Grenzwerte & elektrische Eigenschaften
| Core | ARM Cortex-M0+ (32-bit) |
| Maximale Taktfrequenz | 32 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.6 V to 3.6 V |
| Betriebstemperaturbereich | -40C to +85C (Industrial) |
| Gehäuse / Bauform | 100-TQFP (14x14 mm) |
| Montageart | Surface Mount |
| Integrated LCD Controller | Up to 320 segments (SLCD) |
| ADC | 12-bit SAR + 24-bit Sigma-Delta AFE |
| DAC | 12-bit, 1 MSps |
| Communication Interfaces | SERCOM (USART/SPI/I2C configurable) |
| Active Mode Current (CoreMark) | 39 µA/MHz |
| Ultra-Low-Power Backup Mode (RTC) | 490 nA |
| RoHS-Status | Compliant |
| MSL-Level | 3 (per JEDEC J-STD-020) |
ATSAML22N16A-AUT Pin-Konfiguration
| Pin 1 | PA00 — General-purpose I/O / SERCOM pad |
| Pin 2 | PA01 — General-purpose I/O / SERCOM pad |
| Pin 3 | PA02 — AIN[0] / DAC output / GPIO |
| Pin 4 | PA03 — AIN[1] / GPIO |
| Pin 5 | PA04 — AIN[2] / GPIO |
| Pin 6 | PA05 — AIN[3] / GPIO |
| Pin 7 | PA06 — AIN[4] / GPIO |
| Pin 8 | PA07 — AIN[5] / GPIO |
| Pin 9 | VDDIO — I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — AIN[6] / GPIO |
| Pin 12 | PA09 — AIN[7] / GPIO |
| Pin 13 | PA10 — AIN[8] / GPIO |
| Pin 14 | PA11 — AIN[9] / GPIO |
| Pin 15 | VDDCORE — Internal core voltage (decouple) |
| Pin 16 | PA12 — GPIO / SERCOM |
| Pin 17 | PA13 — GPIO / SERCOM |
| Pin 18 | PA14 — GPIO / SERCOM |
| Pin 19 | PA15 — GPIO / SERCOM |
| Pin 20 | PA16 — GPIO / SERCOM |
| Pin 21 | PA17 — GPIO / SERCOM |
| Pin 22 | PA18 — GPIO / SERCOM |
| Pin 23 | PA19 — GPIO / SERCOM |
| Pin 24 | PA20 — GPIO / SERCOM |
| Pin 25 | PA21 — GPIO / SERCOM |
| Pin 26 | PA22 — GPIO / SERCOM |
| Pin 27 | PA23 — GPIO / SERCOM |
| Pin 28 | PA24 — GPIO / SERCOM |
| Pin 29 | PA25 — GPIO / SERCOM |
| Pin 30 | PA26 — GPIO / SERCOM |
| Pin 31 | PA27 — GPIO / SERCOM |
| Pin 32 | PA28 — GPIO / SERCOM |
| Pin 33 | PA29 — GPIO / SERCOM |
| Pin 34 | PA30 — GPIO / SERCOM |
| Pin 35 | PA31 — GPIO / SERCOM |
| Pin 36 | PB00 — GPIO / SERCOM |
| Pin 37 | PB01 — GPIO / SERCOM |
| Pin 38 | PB02 — GPIO / AFE / SERCOM |
| Pin 39 | PB03 — GPIO / AFE / SERCOM |
| Pin 40 | PB04 — GPIO / AFE / SERCOM |
| Pin 41 | PB05 — GPIO / AFE / SERCOM |
| Pin 42 | PB06 — GPIO / AFE / SERCOM |
| Pin 43 | PB07 — GPIO / AFE / SERCOM |
| Pin 44 | PB08 — GPIO / SERCOM |
| Pin 45 | PB09 — GPIO / SERCOM |
| Pin 46 | PB10 — GPIO / SERCOM |
| Pin 47 | PB11 — GPIO / SERCOM |
| Pin 48 | PB12 — GPIO / SERCOM |
| Pin 49 | PB13 — GPIO / SERCOM |
| Pin 50 | PB14 — GPIO / SERCOM |
| Pin 51 | PB15 — GPIO / SERCOM |
| Pin 52 | PC00 — GPIO / SERCOM |
| Pin 53 | PC01 — GPIO / SERCOM |
| Pin 54 | PC02 — GPIO / SERCOM |
| Pin 55 | PC03 — GPIO / SERCOM |
| Pin 56 | PC04 — GPIO / SERCOM |
| Pin 57 | PC05 — GPIO / SERCOM |
| Pin 58 | PC06 — GPIO / SERCOM |
| Pin 59 | PC07 — GPIO / SERCOM |
| Pin 60 | VDDIO — I/O supply voltage |
| Pin 61 | GND — Ground |
| Pin 62 | PC08 — GPIO / SERCOM |
| Pin 63 | PC09 — GPIO / SERCOM |
| Pin 64 | PC10 — GPIO / SERCOM |
| Pin 65 | PC11 — GPIO / SERCOM |
| Pin 66 | PC12 — GPIO / SERCOM |
| Pin 67 | PC13 — GPIO / SERCOM |
| Pin 68 | PC14 — GPIO / SERCOM |
| Pin 69 | PC15 — GPIO / SERCOM |
| Pin 70 | PC16 — GPIO / SERCOM |
| Pin 71 | PC17 — GPIO / SERCOM |
| Pin 72 | PC18 — GPIO / SERCOM |
| Pin 73 | PC19 — GPIO / SERCOM |
| Pin 74 | PC20 — GPIO / SERCOM |
| Pin 75 | PC21 — GPIO / SERCOM |
| Pin 76 | PC22 — GPIO / SERCOM |
| Pin 77 | PC23 — GPIO / SERCOM |
| Pin 78 | PC24 — GPIO / SERCOM |
| Pin 79 | PC25 — GPIO / SERCOM |
| Pin 80 | PC26 — GPIO / SERCOM |
| Pin 81 | PC27 — GPIO / SERCOM |
| Pin 82 | PC28 — GPIO / SERCOM |
| Pin 83 | PC29 — GPIO / SERCOM |
| Pin 84 | PC30 — GPIO / SERCOM |
| Pin 85 | PC31 — GPIO / SERCOM |
| Pin 86 | PD00 — GPIO / SERCOM |
| Pin 87 | PD01 — GPIO / SERCOM |
| Pin 88 | PD02 — GPIO / SERCOM |
| Pin 89 | PD03 — GPIO / SERCOM |
| Pin 90 | PD04 — GPIO / SERCOM |
| Pin 91 | PD05 — GPIO / SERCOM |
| Pin 92 | PD06 — GPIO / SERCOM |
| Pin 93 | PD07 — GPIO / SERCOM |
| Pin 94 | PD08 — GPIO / SERCOM |
| Pin 95 | PD09 — GPIO / SERCOM |
| Pin 96 | PD10 — GPIO / SERCOM |
| Pin 97 | PD11 — GPIO / SERCOM |
| Pin 98 | PD12 — GPIO / SERCOM |
| Pin 99 | RESETn — Reset input, active low |
| Pin 100 | VSW — DC-DC converter switch output |
Typische Anwendungen
ATSAML22N16A-AUT ist geeignet für 7 Anwendungs: Smart Electricity Meter with LCD Display, Fitness Band / Wearable Health Monitor, Industrial Sensor Node with LCD HMI, Electronic Shelf Label (ESL) with LCD, Home Automation Keypad / Thermostat, Portable Medical Diagnostic Device, Battery-Powered IoT Data Logger.
Smart Electricity Meter with LCD Display
The ATSAML22N16A-AUT's integrated segment LCD controller supports up to 320 segments, which exactly matches the display requirement of single-phase smart electricity meters (typically 8 com x 40 seg = 320 segments for kWh, voltage, current and tamper indicators). Its 490 nA ultra-low-power backup mode with RTC retention allows the meter to maintain time-of-use tariffs and tamper logging on a coin cell for the entire product lifetime. The 24-bit sigma-delta AFE directly digitizes current shunt and voltage divider signals, eliminating an external metering IC and shrinking BOM by ~$0.50. Powered by a single 3.6V lithium battery, it can run 10+ years on a 2400 mAh cell - the headlining use case in Microchip's ATSAML22N datasheet.
Empfohlen
Fitness Band / Wearable Health Monitor
Wearable bands need a small footprint and a weeks-long battery. The ATSAML22N16A-AUT's 100-TQFP body is 14x14 mm - a known-good choice for segmented OLED/LCD replacement designs - and the 39 µA/MHz active current plus 490 nA RTC backup let a heart-rate monitoring band run 30+ days on a CR2032. The integrated 12-bit SAR ADC and 24-bit sigma-delta AFE interface directly with optical PPG sensors (AFE4400 family) and 3-axis accelerometers over SERCOM-configurable SPI or I2C. The Cortex-M0+ core at 32MHz supports BLE stackless beacon broadcasting via a companion BTLC1000 module. Compared to a Cortex-M4 wearable MCU, the L22N halves the active power at the cost of DSP throughput - acceptable for HRM/SpO2 algorithms.
Empfohlen
Industrial Sensor Node with LCD HMI
A factory-floor sensor node with a 4- to 8-digit segment-LCD readout - temperature, pressure, flow rate or valve position - is the canonical ATSAML22N16A-AUT use case. The 1.6V-3.6V supply range accepts a 2x AA or 3.6V lithium primary cell, and the AFE digitizes 4-20 mA loop-powered sensors without an external ADC. SERCOM peripherals handle RS-485 over an external transceiver (e.g. ISL3179) for Modbus RTU. Industrial temperature grade (-40C to +85C) matches most indoor factory environments, and the 100-TQFP with 0.5 mm pitch is reliable through standard reflow profiles. Compared to a Cortex-M0+ without SLCD, the integrated segment driver saves $0.30 BOM.
Empfohlen
Electronic Shelf Label (ESL) with LCD
Electronic shelf labels in retail aisles need low average power (~5 µA) with periodic refresh via a 2.4GHz radio, and a segment LCD for price/Promo/QR display. The ATSAML22N16A-AUT fits perfectly: in idle with RTC running it draws 490 nA; during a refresh burst it wakes the Cortex-M0+ and writes the SLCD registers in under 100 µs. The 64KB Flash is sufficient for ESL application firmware; the 8KB SRAM holds a frame buffer for the next update. Compared to a generic Cortex-M0+ with an external LCD driver, the SAM L22N's integrated SLCD halves quiescent current and removes a BOM line.
Empfohlen
Home Automation Keypad / Thermostat
Wall-mount thermostats and home automation keypads use a 4x4 to 8x8 segment LCD to display temperature, mode, and time. The ATSAML22N16A-AUT drives the display directly while a single SERCOM talks to the on-board Wi-Fi/BLE module (e.g. ATWINC1500). The Cortex-M0+ at 32MHz is sufficient for the control loop and the BLE provisioning stack. The 1.6V-3.6V range accepts power from a 24VAC transformer via a half-wave rectifier. Compared to a 5V Cortex-M0+, the 3.3V operation halves regulator dissipation - meaningful in a sealed wall-mount enclosure without active cooling.
Empfohlen
Portable Medical Diagnostic Device
Handheld point-of-care diagnostic devices - glucometers, INR meters, hemoglobin readers - need a segment LCD that is sunlight-readable and a Cortex-M0+ that wakes briefly to read a biosensor. The ATSAML22N16A-AUT's 24-bit sigma-delta AFE digitizes electrochemical sensor outputs with 6 nV/√Hz input-referred noise - ideal for sub-micromolar analyte detection. The SLCD supports up to 320 segments, enough for alphanumeric patient ID, results, and timestamp. Compared to a Cortex-M0+ without a 24-bit AFE, the integrated sigma-delta removes a $1+ external ADC and simplifies layout. Battery life on a single CR2450 is typically 1-2 years at 3 measurements/day.
Empfohlen
Battery-Powered IoT Data Logger
Field-deployed IoT data loggers - environmental monitors, asset trackers, vibration recorders - need multi-year battery life and an on-device display for local status. The ATSAML22N16A-AUT combines a Cortex-M0+ core that can be duty-cycled to under 0.1% activity with a real-time clock that retains time and a few KB of log metadata at 490 nA. The 12-bit SAR ADC samples environmental sensors (temperature, humidity) at kHz rates, and the 64KB Flash stores 1-2 weeks of time-stamped data before pushing to the cloud over a LoRa or Wi-Fi companion module. Compared to a Cortex-M4 logger, the M0+ halves active power but requires a smaller RTOS or bare-metal design.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ATSAML22N16A-AUT – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ATSAML22N17A-AUT | ATSAML22N18A-AUT | ATSAML22N16A-CFUT | ATSAML22J16A-AUT | ATSAML21J17B-AUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same | 100-UFBGA (different footprint) | 100-TQFP (14x14 mm) - same | 100-TQFP (14x14 mm) - same |
| Core / Clock | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 32 MHz | Cortex-M0+ / 48 MHz |
| Flash / SRAM | 64 KB / 8 KB | 128 KB / 16 KB | 256 KB / 32 KB | 64 KB / 8 KB (same) | 64 KB / 8 KB (same) | 128 KB / 16 KB |
| Integrated SLCD | Yes (up to 320 segments) | Yes (up to 320 segments) | Yes (up to 320 segments) | Yes (up to 320 segments) | Yes (up to 320 segments) | No (L21 family - no SLCD) |
| Supply Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.62 V to 3.63 V |
Wichtigste Unterscheidungsmerkmale
- Integrated 320-segment SLCD removes external LCD driver (vs. ATSAML21J17B-AUT (L21 family - no SLCD))
- 24-bit sigma-delta AFE integrated with Cortex-M0+ (vs. ATSAML22N17A-AUT (same family, only Flash/RAM differ))
- 100-TQFP footprint shared with larger Flash siblings (vs. ATSAML22N18A-AUT (256KB Flash))
Designhinweise
The SAM L22N's 490 nA backup mode retains RTC and a small portion of SRAM (the 'backup' RAM region). To enter this mode, the application must (1) switch the main clock to the 32.768 kHz crystal, (2) disable unused peripherals via the Clock Manager, and (3) set the PMCTRL register to BACKUP mode with the RTC running. Estimated: a poorly-initialized backup sequence can leave the part in STANDBY at ~1.5 µA instead of 490 nA. Always measure the actual Iq on the bench - do not trust nominal datasheet figures when designing for 10-year coin-cell life.
TQFP-100 at 0.5 mm pitch requires 4-mil (0.1 mm) trace-and-space rules. Place the 32.768 kHz crystal as close as possible to pins XIN32/XOUT32 with traces matched to under 5 mm and a guard ground around them. VDDCORE must have a 1 µF + 100 nF X7R pair within 2 mm of the pin. For segment-LCD layouts, route the COM and SEG traces on opposite sides of the LCD glass with a guard GND between them to minimize crosstalk and ghosting. Reference: Microchip AN2466 'SAM L22 Layout Checklist'.
Three common pitfalls in SAM L22N designs: (1) Forgetting to lock the AFE calibration registers after production - this drifts the 24-bit sigma-delta offset over temperature. (2) Using the internal 32 kHz RC oscillator for RTC instead of an external crystal - this drifts >100 ppm and breaks time-of-use metering accuracy. (3) Attempting to use the SLCD charge pump at VDD < 1.8 V without configuring the SLCDCTRLB register - the pump needs at least 1.8 V to bias the display. Reference the SAM L22N errata DS80000754 for a full list of known silicon anomalies.
Compliance-Informationen
RoHS and REACH compliant per Microchip product page. This part is the standard (non-automotive) grade; for AEC-Q100, contact Microchip for the automotive-grade ordering code. Halogen-free per JESD49 and JEDEC JC-14 definitions.
