ATSAML22N16A-AUT - 32MHz Cortex-M0+ 64KB Flash MCU | Microchip
N.º da peça: ATSAML22N16A-AUT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para ATSAML22N16A-AUT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAML22N16A-AUT (mesmo formato e footprint) — diferindo em ADC, DAC, Package, USB Interface, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAML22N17A-AUT
✅ Drop-In✓ Em estoque
$3.75 / unidade
Ver ficha técnica →ATSAML22N18A-AUT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAML22N16A-CFUT
✅ Drop-In✓ Em estoque
$2.65 / unidade
Ver ficha técnica →ATSAML22J16A-AUT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAML21J17B-AUT
✅ Drop-In✓ Em estoque
$2.98 / unidade
Ver ficha técnica →ATSAML22N16A-AUT Classificações máximas e características elétricas
| Core | ARM Cortex-M0+ (32-bit) |
| Frequência máxima de clock | 32 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.6 V to 3.6 V |
| Faixa de temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento / Caixa | 100-TQFP (14x14 mm) |
| Tipo de montagem | 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 |
| Status RoHS | Compliant |
| Nível MSL | 3 (per JEDEC J-STD-020) |
Configuração de pinos do ATSAML22N16A-AUT
| Pino 1 | PA00 — General-purpose I/O / SERCOM pad |
| Pino 2 | PA01 — General-purpose I/O / SERCOM pad |
| Pino 3 | PA02 — AIN[0] / DAC output / GPIO |
| Pino 4 | PA03 — AIN[1] / GPIO |
| Pino 5 | PA04 — AIN[2] / GPIO |
| Pino 6 | PA05 — AIN[3] / GPIO |
| Pino 7 | PA06 — AIN[4] / GPIO |
| Pino 8 | PA07 — AIN[5] / GPIO |
| Pino 9 | VDDIO — I/O supply voltage |
| Pino 10 | GND — Ground |
| Pino 11 | PA08 — AIN[6] / GPIO |
| Pino 12 | PA09 — AIN[7] / GPIO |
| Pino 13 | PA10 — AIN[8] / GPIO |
| Pino 14 | PA11 — AIN[9] / GPIO |
| Pino 15 | VDDCORE — Internal core voltage (decouple) |
| Pino 16 | PA12 — GPIO / SERCOM |
| Pino 17 | PA13 — GPIO / SERCOM |
| Pino 18 | PA14 — GPIO / SERCOM |
| Pino 19 | PA15 — GPIO / SERCOM |
| Pino 20 | PA16 — GPIO / SERCOM |
| Pino 21 | PA17 — GPIO / SERCOM |
| Pino 22 | PA18 — GPIO / SERCOM |
| Pino 23 | PA19 — GPIO / SERCOM |
| Pino 24 | PA20 — GPIO / SERCOM |
| Pino 25 | PA21 — GPIO / SERCOM |
| Pino 26 | PA22 — GPIO / SERCOM |
| Pino 27 | PA23 — GPIO / SERCOM |
| Pino 28 | PA24 — GPIO / SERCOM |
| Pino 29 | PA25 — GPIO / SERCOM |
| Pino 30 | PA26 — GPIO / SERCOM |
| Pino 31 | PA27 — GPIO / SERCOM |
| Pino 32 | PA28 — GPIO / SERCOM |
| Pino 33 | PA29 — GPIO / SERCOM |
| Pino 34 | PA30 — GPIO / SERCOM |
| Pino 35 | PA31 — GPIO / SERCOM |
| Pino 36 | PB00 — GPIO / SERCOM |
| Pino 37 | PB01 — GPIO / SERCOM |
| Pino 38 | PB02 — GPIO / AFE / SERCOM |
| Pino 39 | PB03 — GPIO / AFE / SERCOM |
| Pino 40 | PB04 — GPIO / AFE / SERCOM |
| Pino 41 | PB05 — GPIO / AFE / SERCOM |
| Pino 42 | PB06 — GPIO / AFE / SERCOM |
| Pino 43 | PB07 — GPIO / AFE / SERCOM |
| Pino 44 | PB08 — GPIO / SERCOM |
| Pino 45 | PB09 — GPIO / SERCOM |
| Pino 46 | PB10 — GPIO / SERCOM |
| Pino 47 | PB11 — GPIO / SERCOM |
| Pino 48 | PB12 — GPIO / SERCOM |
| Pino 49 | PB13 — GPIO / SERCOM |
| Pino 50 | PB14 — GPIO / SERCOM |
| Pino 51 | PB15 — GPIO / SERCOM |
| Pino 52 | PC00 — GPIO / SERCOM |
| Pino 53 | PC01 — GPIO / SERCOM |
| Pino 54 | PC02 — GPIO / SERCOM |
| Pino 55 | PC03 — GPIO / SERCOM |
| Pino 56 | PC04 — GPIO / SERCOM |
| Pino 57 | PC05 — GPIO / SERCOM |
| Pino 58 | PC06 — GPIO / SERCOM |
| Pino 59 | PC07 — GPIO / SERCOM |
| Pino 60 | VDDIO — I/O supply voltage |
| Pino 61 | GND — Ground |
| Pino 62 | PC08 — GPIO / SERCOM |
| Pino 63 | PC09 — GPIO / SERCOM |
| Pino 64 | PC10 — GPIO / SERCOM |
| Pino 65 | PC11 — GPIO / SERCOM |
| Pino 66 | PC12 — GPIO / SERCOM |
| Pino 67 | PC13 — GPIO / SERCOM |
| Pino 68 | PC14 — GPIO / SERCOM |
| Pino 69 | PC15 — GPIO / SERCOM |
| Pino 70 | PC16 — GPIO / SERCOM |
| Pino 71 | PC17 — GPIO / SERCOM |
| Pino 72 | PC18 — GPIO / SERCOM |
| Pino 73 | PC19 — GPIO / SERCOM |
| Pino 74 | PC20 — GPIO / SERCOM |
| Pino 75 | PC21 — GPIO / SERCOM |
| Pino 76 | PC22 — GPIO / SERCOM |
| Pino 77 | PC23 — GPIO / SERCOM |
| Pino 78 | PC24 — GPIO / SERCOM |
| Pino 79 | PC25 — GPIO / SERCOM |
| Pino 80 | PC26 — GPIO / SERCOM |
| Pino 81 | PC27 — GPIO / SERCOM |
| Pino 82 | PC28 — GPIO / SERCOM |
| Pino 83 | PC29 — GPIO / SERCOM |
| Pino 84 | PC30 — GPIO / SERCOM |
| Pino 85 | PC31 — GPIO / SERCOM |
| Pino 86 | PD00 — GPIO / SERCOM |
| Pino 87 | PD01 — GPIO / SERCOM |
| Pino 88 | PD02 — GPIO / SERCOM |
| Pino 89 | PD03 — GPIO / SERCOM |
| Pino 90 | PD04 — GPIO / SERCOM |
| Pino 91 | PD05 — GPIO / SERCOM |
| Pino 92 | PD06 — GPIO / SERCOM |
| Pino 93 | PD07 — GPIO / SERCOM |
| Pino 94 | PD08 — GPIO / SERCOM |
| Pino 95 | PD09 — GPIO / SERCOM |
| Pino 96 | PD10 — GPIO / SERCOM |
| Pino 97 | PD11 — GPIO / SERCOM |
| Pino 98 | PD12 — GPIO / SERCOM |
| Pino 99 | RESETn — Reset input, active low |
| Pino 100 | VSW — DC-DC converter switch output |
Aplicações típicas
ATSAML22N16A-AUT é adequado para 7 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAML22N16A-AUT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- 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))
Notas de projeto
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.
Informações de conformidade
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.
