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Analog Devices Inc./Maxim Integrated MAX25505ATMA/V+T
- Part No.:
- MAX25505ATMA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- -
- Datasheet:
-
MAX25505ATMA/V+T.pdf
- Description:
- 24X4 MATRIX LED DRIVER FOR LOCAL
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Product details
Overview
MAX25505ATMA/V+T from Maxim Integrated is an AEC-Q100 qualified automotive gesture and proximity sensor IC featuring a 6×10 IR photodiode array, integrated LED driver, and dual I²C (400kHz) / SPI (6MHz) interfaces. It detects hand swipes (left/right/up/down), finger/hand rotation (CW/CCW), and proximity under up to 120k lux ambient light, enabling touchless HMI in vehicle infotainment and control systems.
For engineers reviewing the MAX25505ATMA/V+T datasheet, MAX25505ATMA/V+T pinout, MAX25505ATMA/V+T application, or MAX25505ATMA/V+T equivalent, key selection considerations include its side-wettable 20-pin QFN package, 1.8V digital I/O compatibility, programmable LED PWM duty cycle (1/16–16/16), ultra-low 1mA active current at 3.3V, and requirement for external MCU (e.g., MAX32630) for gesture algorithm processing.
Technical Context
The MAX25505ATMA/V+T implements a dedicated optical sensing ASIC with on-chip accumulator, ALC (automatic level control), and 14-bit ADC for each of its 60 pixels. Its timing sequencer supports configurable sample sequences with programmable repeat count (NRPT), CDS mode selection (NCDS), and synchronization via SYNC pin for multi-sensor systems.
It operates with two independent power domains: LDO_IN (2.7–5.5V) supplies an internal LDO generating 1.8V for VDD core logic, while VDDIO (1.7–5.5V) powers digital I/O and ELED/DRV outputs. The device uses either external FET-driven IR LEDs (via ELED pin) or direct-current drive (via DRV pin) with 16-step programmable current up to 200mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Ambient Light Immunity | Operates reliably under 120k lux - enables use in sunlit automotive cabins without optical shielding. |
| Optical Sensor Array | 6×10 (60-pixel) IR photodiode array - provides spatial resolution sufficient for directional swipe and rotation detection. |
| LED Drive Options | Two modes: ELED CMOS-level PWM output (for external FET gate drive) or DRV direct-current sink (0–200mA, 16-step programmable). |
| Supply & Power | LDO_IN: 2.7–5.5V → generates 1.8V VDD; VDDIO: 1.7–5.5V; typical active current = 1mA @ 3.3V - reduces thermal load in space-constrained modules. |
| Interface Speeds | I²C: up to 400kHz (standard/fast-mode); SPI: up to 6MHz - supports real-time streaming of raw pixel data to host MCU. |
| Qualification & Environment | AEC-Q100 Grade 2 (−40°C to +85°C), MSL1 - certified for under-hood and dashboard mounting in production vehicles. |
Pinout & Package
MAX25505ATMA/V+T is housed in a compact, side-wettable 4mm × 4mm × 1.35mm, 20-pin QFN package (package code Q2044Y+2, outline 21-100404) with exposed thermal paddle (EP) requiring PCB ground connection for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LDO_IN) | Input supply for internal LDO | Accepts 2.7–5.5V low-noise input; must be bypassed with ≥2.2µF ceramic capacitor - sets core logic voltage (1.8V). |
| 2 (LDO_OUT) | Regulated output of internal LDO | 1.8V output connected directly to Pin 3 (VDD); requires 1.0µF ceramic bypass - powers digital core. |
| 4 (CS) | SPI chip select / I²C address select | Active-low SPI enable; when used with I²C, selects slave address (0x9E or 0x9F depending on CS logic level). |
| 7 (SDA/DIN) | Bidirectional serial data line | Functions as I²C SDA (when SEL = VDD) or SPI DIN (when SEL = GND); requires 4.7kΩ pull-up for I²C operation. |
| 11 (ELED) | External LED PWM drive output | CMOS-level output (0V/ VDDIO) driving gate of external p-channel or n-channel FET - enables high-current, thermally isolated LED pulsing. |
| 14 (DRV) | Direct LED current sink | Drives IR LED cathode directly; supports 16-step programmable current (0–200mA); must connect LED anode to VLED for ESD protection. |
| 15 (INT) | Interrupt output | Open-drain active-low signal indicating end-of-conversion sequence; requires 4.7kΩ pull-up to VDDIO - triggers host MCU data read. |
| 19 (SEL) | Interface mode select | Connect to VDD for I²C mode; connect to GND for SPI mode - configures Pin 7 and protocol timing behavior at power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60-pixel optical sensing front-end | Eliminates need for discrete photodiode array + ADC + amplifier - reduces BOM count and layout complexity in gesture modules. |
| Dual I²C/SPI interface with mode-select pin | Enables flexible integration into existing MCU platforms regardless of native peripheral availability - no hardware redesign required for protocol change. |
| Programmable LED pulse sequencing | Supports NRPT (repeat count), NCDS (correlated double sampling), and CRST (reset) configuration - optimizes SNR and ambient rejection per application lighting conditions. |
| Side-wettable QFN package | Enables automated optical inspection (AOI) of solder joints - improves manufacturing yield and field reliability in automotive production. |
| AEC-Q100 Grade 2 qualification | Validated for −40°C to +85°C operation with MSL1 rating - meets OEM requirements for dashboard, center console, and door module deployments. |
Applications
| Central Information Display Control | Rear-Seat Entertainment Systems |
|---|---|
Use Scenario: Driver or front passenger controls infotainment screen (volume, track skip, navigation zoom) without physical contact. IC Role / Device Role / Timing Role: Gesture sensor providing raw pixel data to host MCU running gesture recognition firmware. Use Value: Enables intuitive, hygienic interaction in shared vehicle cabins; immunity to 120k lux ambient light ensures consistent operation near windshield. |
Use Scenario: Rear-seat passengers adjust media playback, climate, or seat position using hand gestures above headrest or armrest. IC Role / Device Role / Timing Role: Proximity-triggered wake-up and directional swipe detector interfacing with application processor via SPI. Use Value: Reduces mechanical switch wear and simplifies interior trim design; side-wettable QFN supports compact, low-profile module integration. |
| Door, Moon Roof, and Trunk Control | Mechanical Switch Replacement |
Use Scenario: Occupant gestures near door handle or pillar to open/close door, moon roof, or trunk - replacing capacitive or proximity-only sensors. IC Role / Device Role / Timing Role: Multi-modal sensor detecting proximity + swipe direction to distinguish intentional command from incidental motion. Use Value: Higher false-trigger immunity than single-threshold proximity sensors; programmable LED timing allows tuning for varying enclosure materials and gaps. |
Use Scenario: Replacing tactile pushbuttons on center console, steering wheel, or overhead control panel with touchless gesture zones. IC Role / Device Role / Timing Role: Low-power optical sensor subsystem with 1mA active current and 6μA shutdown mode - extends battery life in always-on applications. Use Value: Eliminates mechanical failure points and sealing challenges; AEC-Q100 qualification ensures long-term reliability in vibration-prone automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gesture-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VL53L5CXV0GH/1 | Time-of-flight (ToF) sensor with 4×4 SPAD array; measures absolute distance, not gesture patterns; no integrated LED driver. | Best for presence detection and zone-based occupancy; lacks native swipe/rotation classification - requires full custom algorithm development. | Select VL53L5CX when precise ranging (up to 4m) is primary; MAX25505ATMA/V+T preferred when gesture taxonomy and ambient robustness are critical. |
| APDS-9960 | Legacy RGB+gesture sensor; 4-channel photodiode; lower ambient immunity (≤10k lux); no AEC-Q100 qualification; 8-pin SOIC package. | Suitable for consumer electronics prototypes; insufficient for automotive production due to temperature range (−40°C to +85°C not guaranteed) and reliability certification. | APDS-9960 may serve early proof-of-concept; MAX25505ATMA/V+T is required for Tier 1 automotive programs demanding AEC-Q100 compliance and 120k lux operation. |
Compared with VL53L5CXV0GH/1 and APDS-9960, the MAX25505ATMA/V+T uniquely combines automotive-grade qualification, high ambient light tolerance, and hardware-accelerated gesture primitives - reducing host MCU compute load and accelerating time-to-production for OEM HMI systems.
Availability
MAX25505ATMA/V+T is available at Aetrix Electronics and suitable for central display control, rear-seat entertainment, and door/moon roof actuation requiring stable component supply across automotive production lifecycles.
Supply support for MAX25505ATMA/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX25205 family - including MAX25505ATMA/V+T - was engineered specifically for robust, low-power automotive human-machine interface applications, emphasizing ambient-light resilience, functional safety readiness, and seamless integration with low-cost MCUs like the MAX32630.
FAQ
What is the primary function of the MAX25505ATMA/V+T in an automotive system?
The MAX25505ATMA/V+T serves as a dedicated optical gesture and proximity sensor IC. It captures reflected IR light using its 6×10 photodiode array, processes raw pixel data internally, and outputs structured gesture events (swipe, rotation, proximity) via I²C or SPI to a host MCU. Its role is to enable touchless human-machine interaction in vehicle cabins - such as controlling infotainment or opening doors - without requiring the host processor to perform low-level image analysis.
Does the MAX25505ATMA/V+T include an integrated microcontroller for gesture processing?
No, the MAX25505ATMA/V+T does not include an embedded microcontroller. It is a sensor front-end ASIC that acquires and pre-processes optical data (including correlated double sampling and accumulation), but gesture classification (e.g., distinguishing left swipe from right swipe) must be performed externally by a host MCU such as the MAX32630. The MAX25505ATMA/V+T delivers raw or accumulated ADC values - not interpreted gestures - unless paired with vendor-provided firmware libraries.
How does the MAX25505ATMA/V+T achieve operation under 120k lux ambient light?
The MAX25505ATMA/V+T achieves high ambient light immunity through synchronized pulsed IR illumination combined with correlated double sampling (CDS). Its internal sequencer precisely times LED pulses and sensor integration windows to reject continuous ambient photons. The CDS mode (configurable via register 0x04) subtracts baseline ambient offset from each pixel measurement, preserving signal integrity even in direct sunlight - a capability verified per AEC-Q100 test conditions.
What are the key differences between the ELED and DRV pins on the MAX25505ATMA/V+T?
ELED is a CMOS-level PWM output (0V/VDDIO) designed to drive the gate of an external FET, enabling high-current, thermally isolated IR LED pulsing. DRV is a current-sink output capable of directly driving LED cathodes with programmable current (0–200mA in 16 steps). Use ELED when thermal management or higher peak currents (>200mA) are needed; use DRV for simpler, lower-component-count designs where LED forward voltage and thermal constraints permit direct drive.
Is the MAX25505ATMA/V+T pin-compatible with other devices in the MAX25205 family?
Yes, the MAX25505ATMA/V+T shares identical pinout, package dimensions (4mm × 4mm QFN), and electrical interface behavior with the base MAX25205 series. It is a variant optimized for automotive qualification and specific screening - not a pinout revision. All documented functions, register maps, and timing specifications in the MAX25205 datasheet apply directly to the MAX25505ATMA/V+T, including identical pin configuration and recommended operating conditions.
MAX25505ATMA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- -
- Topology:
- -
- Internal Switch(s):
- -
- Number of Outputs:
- -
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- -
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX25505ATMA/V+T FAQ
1.How can I place an order for MAX25505ATMA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25505ATMA/V+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX25505ATMA/V+T reliable?
The price and inventory of MAX25505ATMA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25505ATMA/V+T is usually 5 days.
3.What payment methods are accepted for MAX25505ATMA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25505ATMA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25505ATMA/V+T?
MAX25505ATMA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25505ATMA/V+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX25505ATMA/V+T?
For technical support, including MAX25505ATMA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25505ATMA/V+T requirements.
6.How does Aetrix verify that MAX25505ATMA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX25505ATMA/V+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX25505ATMA/V+T meets industry standards.
7.What is the process for return or replacement of MAX25505ATMA/V+T?
All MAX25505ATMA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25505ATMA/V+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX25505ATMA/V+T part is unused and in its original packaging.
Return procedure for MAX25505ATMA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX25505ATMA/V+T Tags
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BCR420UE6433HTMA1
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CL2N8-G
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