ATSAML22G18A-MUT - 32MHz ARM Cortex-M0+ 256KB MCU | Microchip
Référence : ATSAML22G18A-MUT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.37 | $43,70 |
| 100 | $3.85 | $385,00 |
| 500 | $3.42 | $1 710,00 |
| 1 000 | $3.05 | $3 050,00 |
| 3 000 | $2.68 | $8 040,00 |
ATSAML22G18A-MUT Présentation
What is a SAM L22 microcontroller? The SAM L22 family sits within Microchip's broader SAM lineup of 32-bit ARM Cortex microcontrollers. A microcontroller (MCU) is a single-chip computer integrating a CPU core, Flash program memory, SRAM data memory, and programmable peripherals. The L22 sub-family is differentiated by its ultra-low-power architecture, segment LCD driver, and Cortex-M0+ efficiency - aimed at deeply embedded applications that must run for years on a single coin cell. In the system hierarchy it occupies the power-management-aware edge of the IoT device spectrum: MCU -> ultra-low-power MCU -> segment LCD MCU -> SAM L22 family.
Key differentiating specifications include 39 uA/MHz active current running CoreMark, 490 nA ultra-low-power backup mode with RTC retention, integrated 16-channel 12-bit ADC, four SERCOM interfaces (configurable as I2C/SPI/UART), full-speed USB device with internal pull-up, and a segment LCD controller supporting up to 8x32 segments. The Cortex-M0+ core delivers 0.9 DMIPS/MHz with single-cycle I/O access and an MPU for memory protection.
Architecturally, the device uses a Harvard-style bus matrix with separate AHB/APB domains, SleepWalking peripherals that wake only on configured events, and event system for zero-CPU peripheral-to-peripheral signaling. The 32MHz operation is sourced from an internal 32.768kHz oscillator and PLL, eliminating external crystals in many designs. Operating voltage spans 1.6V to 3.6V across -40C to +85C industrial range.
Typical applications include battery-powered flow and gas meters, wearable health monitors with segment LCD displays, smart thermostats, electronic shelf labels, IoT sensor nodes with USB diagnostic port, and industrial HMI panels. The on-chip LCD driver eliminates the need for an external segment-driver IC.
When designing with this part, route the segment LCD pins as a dedicated bus to minimize crosstalk, place the decoupling capacitor within 2mm of VDDIN, and verify the backup domain RTC crystal load capacitance to achieve the 490 nA standby target. The page synthesizes distributor pricing, drop-in alternatives from the SAM L22 family, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour ATSAML22G18A-MUT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAML22G18A-MUT (même facteur de forme et même empreinte) — différant par Package, Carrier Type, Operating Temperature, Active Current (CoreMark), Connectivity.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAML22G16A-MUT
✅ Remplacement direct✓ En stock
$2.45 / unité
Voir la fiche technique →ATSAML22G17A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.21 / unité
Voir la fiche technique →ATSAML22J16A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATSAML22G18A-MU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAML22G18A-MUT Valeurs maximales et caractéristiques électriques
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit Single-Core |
| Core Speed | 32 MHz |
| Program Memory | 256 KB (256K x 8) Flash |
| Tension d'alimentation | 1.6 V to 3.6 V |
| Température de fonctionnement | -40C to +85C |
| Boîtier | 48-VFQFN Exposed Pad (7x7 mm) |
| Package Code | HVQCCN-48 |
| Type de montage | Surface Mount |
| Connectivity | I2C, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Active Current | 39 uA/MHz (CoreMark) |
| Backup Mode Current | 490 nA (RTC retention) |
| Segment LCD | Up to 8x32 segments |
| Data Converters | A/D 16x12b |
| Oscillator | Internal 32.768 kHz with PLL |
| Statut RoHS | Compliant |
| Carrier Type | Tape & Reel |
| Series | SAM L22G |
Configuration des broches de ATSAML22G18A-MUT
| Broche 1 | PA00 — General I/O / ADC IN0 |
| Broche 2 | PA01 — General I/O / ADC IN1 |
| Broche 3 | PA02 — General I/O / ADC IN2 |
| Broche 4 | PA03 — General I/O / ADC IN3 |
| Broche 5 | PA04 — General I/O / VREF |
| Broche 6 | PA05 — General I/O / ADC IN5 |
| Broche 7 | PA06 — General I/O / ADC IN6 |
| Broche 8 | PA07 — General I/O / ADC IN7 |
| Broche 9 | VDDIN — Digital supply voltage |
| Broche 10 | GND — Ground |
| Broche 11 | VDDCORE — Internal core LDO output (decoupling) |
| Broche 12 | PA08 — General I/O / NMI |
| Broche 13 | PA09 — General I/O / SERCOM |
| Broche 14 | PA10 — General I/O / SERCOM |
| Broche 15 | PA11 — General I/O / SERCOM |
| Broche 16 | PA14 — General I/O / XIN32 |
| Broche 17 | PA15 — General I/O / XOUT32 |
| Broche 18 | PA16 — General I/O / SERCOM |
| Broche 19 | PA17 — General I/O / SERCOM |
| Broche 20 | PA18 — General I/O / SERCOM |
| Broche 21 | PA19 — General I/O / SERCOM |
| Broche 22 | PA20 — General I/O / SERCOM |
| Broche 23 | PA21 — General I/O / SERCOM |
| Broche 24 | PA22 — General I/O / SERCOM |
| Broche 25 | PA23 — General I/O / SERCOM |
| Broche 26 | PA24 — General I/O / USB D- |
| Broche 27 | PA25 — General I/O / USB D+ |
| Broche 28 | GND — Ground |
| Broche 29 | VDDIO — I/O supply voltage |
| Broche 30 | PB00 — General I/O / Segment LCD COM0 |
| Broche 31 | PB01 — General I/O / Segment LCD COM1 |
| Broche 32 | PB02 — General I/O / Segment LCD COM2 |
| Broche 33 | PB03 — General I/O / Segment LCD COM3 |
| Broche 34 | PB04 — General I/O / Segment LCD SEG0 |
| Broche 35 | PB05 — General I/O / Segment LCD SEG1 |
| Broche 36 | PB06 — General I/O / Segment LCD SEG2 |
| Broche 37 | PB07 — General I/O / Segment LCD SEG3 |
| Broche 38 | PB08 — General I/O / Segment LCD SEG4 |
| Broche 39 | PB09 — General I/O / Segment LCD SEG5 |
| Broche 40 | PB10 — General I/O / Segment LCD SEG6 |
| Broche 41 | PB11 — General I/O / Segment LCD SEG7 |
| Broche 42 | PB12 — General I/O / Segment LCD SEG8 |
| Broche 43 | PB13 — General I/O / Segment LCD SEG9 |
| Broche 44 | PB14 — General I/O / Segment LCD SEG10 |
| Broche 45 | PB15 — General I/O / Segment LCD SEG11 |
| Broche 46 | PB16 — General I/O / Segment LCD SEG12 |
| Broche 47 | PB17 — General I/O / Segment LCD SEG13 |
| Broche 48 | RESET — Reset input (active low) |
Applications typiques
ATSAML22G18A-MUT convient pour 6 applications: Battery-Powered Flow and Gas Meters, Wearable Health Monitors with LCD, Smart Thermostats and HVAC Controllers, Electronic Shelf Labels (ESL) and Retail Signage, Industrial HMI Panels and Metering HMIs, IoT Sensor Nodes with USB Diagnostic Port.
Battery-Powered Flow and Gas Meters
The ATSAML22G18A-MUT fits battery-powered flow and gas meters because its 490 nA backup-mode current with RTC retention lets a single D-cell or two AA batteries run the meter for 10+ years. The integrated segment LCD controller supports the 8-digit counter and flow-rate display directly, eliminating an external segment-driver IC and saving both BOM cost and PCB area. Its 39 uA/MHz active current running CoreMark keeps total energy per measurement event under 100 uJ, well within the budget of an ultrasonic or magnetic flow sensor duty cycle.
Recommandé
Wearable Health Monitors with LCD
The ATSAML22G18A-MUT serves wearable health monitors where the integrated segment LCD can directly drive the status display showing heart rate, step count, or battery level without an additional driver chip. At 32 MHz Cortex-M0+ it has just enough throughput for BLE-stack co-processing or onboard sensor fusion with the on-chip 12-bit ADC reading PPG or bio-impedance signals. The 1.6 V minimum supply enables a single CR2032 coin cell to last months of continuous wear with the ultra-low-power SleepWalking peripheral architecture.
Recommandé
Smart Thermostats and HVAC Controllers
The ATSAML22G18A-MUT is well suited for smart thermostats because its segment LCD controller drives a multi-digit temperature and humidity display with charge-pump bias generation, eliminating an external -5V bias IC. Its four SERCOM interfaces can simultaneously handle I2C temperature/humidity sensors, SPI E-Paper backup, UART for the HVAC control loop, and full-speed USB for installer firmware updates. The 32 KB SRAM and 256 KB Flash easily fit the standard thermostat firmware plus BLE provisioning libraries and OTA update handlers.
Recommandé
Electronic Shelf Labels (ESL) and Retail Signage
The ATSAML22G18A-MUT drives electronic shelf labels where the segment LCD controller handles price, promotion, and inventory data on low-power reflective displays. The 490 nA backup current lets shelf labels run 5+ years on a coin cell between price updates, while the on-chip event system wakes the radio peripheral only when new pricing data arrives. Four SERCOM interfaces support SPI E-Paper, I2C ambient light sensor, UART for sub-GHz or BLE RF module, and debug interface without external multiplexer ICs.
Recommandé
Industrial HMI Panels and Metering HMIs
The ATSAML22G18A-MUT powers industrial HMI panels where its segment LCD supports process-variable displays, status icons, and alarm indicators across 8x32 segments without an external driver. The 1.6 V to 3.6 V supply tolerates 24V industrial bus transients when paired with a simple Zener-clamps + DC-DC front end, while the -40C to +85C industrial temperature rating supports factory-floor deployment. The Cortex-M0+ core runs EtherCAT or Modbus slave stacks with DMA-assisted serial buffer handling, keeping CPU utilization below 60%.
Recommandé
IoT Sensor Nodes with USB Diagnostic Port
The ATSAML22G18A-MUT is ideal for IoT sensor nodes that need a USB diagnostic port for firmware flashing and field telemetry without an external USB-to-UART bridge IC. Full-speed USB device with internal pull-up is integrated, while the 39 uA/MHz active current and 490 nA standby current enable battery-only deployment in remote sensor installations. The 32 KB SRAM comfortably fits TLS 1.2 handshake buffers plus the radio driver for sub-GHz or BLE sensor mesh applications using the four SERCOM channels.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAML22G18A-MUT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAML22G16A-MUT | ATSAML22G17A-MUT | ATSAML22J16A-MUT | ATSAML22G18A-MU |
|---|---|---|---|---|---|
| Package | VQFN-48 (7x7 mm) | VQFN-48 (7x7 mm) - same | VQFN-48 (7x7 mm) - same | VQFN-48 (7x7 mm) - same | VQFN-48 (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash | 256 KB | 64 KB (-75%) | 128 KB (-50%) | 64 KB (-75%) | 256 KB (same) |
| SRAM | 32 KB | 8 KB (-75%) | 16 KB (-50%) | 8 KB (-75%) | 32 KB (same) |
| Core | ARM Cortex-M0+ 32 MHz | ARM Cortex-M0+ 32 MHz - same | ARM Cortex-M0+ 32 MHz - same | ARM Cortex-M0+ 32 MHz - same | ARM Cortex-M0+ 32 MHz - same |
| Supply Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V - same | 1.6 V to 3.6 V - same | 1.6 V to 3.6 V - same | 1.6 V to 3.6 V - same |
| Segment LCD | Up to 8x32 | Up to 8x32 - same | Up to 8x32 - same | Up to 8x32 - same | Up to 8x32 - same |
| Operating Temperature | -40C to +85C | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device - same | USB 2.0 Full-Speed Device - same | USB 2.0 Full-Speed Device - same | USB 2.0 Full-Speed Device - same |
Principaux différenciateurs
- Integrated segment LCD controller (vs ATSAML22G16A-MUT)
- Ultra-low-power 490 nA backup mode (vs ATSAMD21G18A-MF)
- USB device with internal pull-up (vs ATSAML10E16A-MUT)
Notes de conception
Place a 1 uF X7R ceramic decoupling capacitor within 2 mm of the VDDIN pin and a 100 nF X7R within 2 mm of VDDCORE to stabilize the internal LDO. The ATSAML22G18A-MUT's 39 uA/MHz active current means a 32 MHz loop reading sensors spends roughly 1.25 mA; switching to SleepWalking mode between readings drops average current by 30-100x. Estimated: at 1 measurement per second, average current is ~120 uA.
Route the segment LCD bus (PB00-PB17 in the SAM L22) as a tight bundle on one PCB layer with continuous ground beneath, separated from switching signals by at least 3 mm. The exposed pad of the 48-VFQFN-EP package must be soldered to a continuous ground plane with 9 thermal vias in a 3x3 grid for proper thermal dissipation. Use Microchip's MPLAB X Pin Manager to verify pin assignments because peripheral multiplexing differs between SAM L21 and SAM L22.
The USB DP/DM differential pair (PA24/PA25) must be routed with 90-ohm differential impedance and matched within 2 mm. Place the 48 MHz USB reference clock crystal within 5 mm of the XIN/XOUT pins, with load capacitors sized per crystal manufacturer CL spec minus 5 pF of stray capacitance. Failure to match impedance causes USB enumeration failures and corrupt USB packets at full-speed 12 Mbps.
Do not exceed 3.6 V on VDDIN even momentarily - the SAM L22 lacks 5 V tolerance on any I/O. Brown-out detection must be enabled in firmware to safely retain RTC and backup registers during battery swaps. Estimated: at 490 nA with a 200 mAh CR2032 cell, theoretical battery life is ~46 years but practical life is ~5 years due to self-discharge. The ATSAML22G18A-MUT must not be confused with the ATSAME70 family - they share SAM branding but are entirely different cores.
Informations de conformité
RoHS compliant and halogen-free per Microchip material declaration. Industrial grade (-40C to +85C), not AEC-Q100 qualified - choose ATSAML22G18A-MUT automotive variant if available for vehicle applications.
