GT911
Capacitive Touch ControllerThe GT911 is a capacitive touch controller from Goodix. View the full GT911 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Goodix
Category
Capacitive Touch Controller
Package
QFN-52 (6x6mm, 0.4mm Pitch)
Overview
Part: GT911 — Goodix Type: 5-Point Capacitive Touch Controller Description: A new-generation 5-point capacitive touch solution designed for 7' to 8' MID, supporting up to 5 concurrent touches with real-time tracking of accurate position and motion trajectory, and integrating HotKnot.
Operating Conditions:
- Supply voltage: 2.8V to 3.3V
- Operating temperature: -40 °C to +85 °C
- Host interface voltage: 1.8V to 3.3V
Absolute Maximum Ratings:
- Max supply voltage: 3.6V
- Max junction/storage temperature: +125 °C
Key Specs:
- Report rate: 100Hz
- Channels: 26 (Tx) * 14 (Rx)
- HotKnot transmission rate: 7.0Kbps (max)
- HotKnot data frame maximum capacity: 128 bytes
- Green mode response time: <48ms
- Sleep mode response time: <200ms
- Initialization time: <200ms
- Power supply ripple: Vpp ≦ 50mV
Features:
- Built-in capacitive sensing circuit and high-performance MPU
- Outputs touch coordinates in real time
- Flash embedded; In-system reprogrammable
- Adaptive frequency hopping
- Self-calibration during initialization
- Automatic drift compensation
- Supports touch key design on FPC
- Supports OGS full lamination
Applications:
- 7' to 8' MID (Mobile Internet Device)
Package:
- QFN 52 pins (6mm6mm0.8mm, 0.4mm Pitch)
Features
- Built-in capacitive sensing circuit and high-performance MPU
- Report rate: 100Hz
- Outputs touch coordinates in real time
- Unified software applicable to capacitive touch screens of various sizes
- Single power supply, internal 1.8V LDO
- Flash embedded; In-system reprogrammable
- HotKnot integrated
- Capacitive touch sensor
- Channels: 26 (Tx channels)*14 (Rx channels)
- Supports capacitive touch screen sizes: 7' to 8'
- Supports touch key design on FPC
- Supports ITO glass and ITO Film
- Cover Lens thickness supported: 0.55mm ≦ Glass ≦ 2mm,
- 0.5mm ≦ PMMA ≦ 1.2mm,
(For detail, please refer to Sensor Design Guidelines )
- Adaptive frequency hopping
- Supports OGS full lamination
- HotKnot
- Transmission rate : 7.0Kbps(max)
- Data frame maximum capacity : 128 bytes
- Applicable sensor types: OGS/traditional GFF/GG/GF
- Environmental adaptability
- Self-calibration during initialization
- Automatic drift compensation
- Operating temperature: -40 °C to +85 °C ; humidity: ≦ 95%RH
- Storage temperature: -60 °C to +125 °C ; humidity: ≦ 95%RH
- Host interface
- Standard I 2 C interface
- Works in slave mode
- Supports 1.8V to 3.3V host interface voltage
- Response time
- Green mode: <48ms
- Sleep mode: <200ms
- Initialization: <200ms
- Power supply voltage:
- Single supply: 2.8V to 3.3V
- Power supply ripple:
- Vpp ≦ 50mV
- Package: 52 pins, 6mm6mm0.8mm, QFN 0.4mm Pitch
- Tools provided to support application development:
- Touch panel module parameter detector and auto-generator
- Touch panel module performance test tool
- MP Test Tool
- Reference driver code and documentary guide for host software development
Pin Configuration
| Pin No. | Name | Function description | Remarks |
|---|---|---|---|
| 1~11 | SEN3 to SEN13 | Receiver electrodes | Output drive signal while HotKnot function is on |
| 12 | AVDD28 | Analog power | 2.2μF filter capacitor to GND |
| 13 | AVDD18 | 2.2μF filter capacitor to GND | |
| 14 | DVDD12 | 2.2μF filter capacitor to GND | |
| 15 | DGND | Digital signal ground | |
| 16 | INT | Interrupt signal | |
| 17 | Sensor_OPT1 | Module ID pin | Register configurable |
| 18 | Sensor_OPT2 | Module ID pin | External pull-down resistor required |
| 19 | I2C_SDA | I 2 C data signal | |
| 20 | I2C_SCL | I 2 C clock signal | |
| 21 | VDDIO | Supply voltage of GPIO | 2.2μF filter capacitor to GND Floating: 1.8V Connect to AVDD:AVDD |
| 22 | /RSTB | Reset pin | External 10K pull-up resistor required, active-low reset |
| 23~48 | DRV25 to DRV0 | Transmitter electrodes | |
| 49 | AGND | Analog signal ground | |
| 50~52 | SEN0 to SEN2 | Receiver electrodes | Output drive signal while HotKnot function is on |
Electrical Characteristics
(Ambient temperature:25 °C , AVDD=2.8V, VDDIO=1.8V)
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| OSC oscillation frequency | 59 | 60 | 61 | MHz |
| I/O output rise time, low to high | - | 14 | - | ns |
| I/O output fall time, high to low | - | 14 | - | ns |
Absolute Maximum Ratings
(Ambient temperature: 25
°C )
| Parameter | Min. | Max. | Unit |
|---|---|---|---|
| Analog power AVDD28 (please refer to AGND) | 2.66 | 3.47 | V |
| VDDIO (please refer to DGND) | 1.7 | 3.47 | V |
| Voltage acceptable to digital I/O | -0.3 | 3.47 | V |
| Voltage acceptable to analog I/O | -0.3 | 3.47 | V |
| Range of operating temperature | -40 | 85 | °C |
| Range of storage temperature | -60 | 125 | °C |
| Welding temperature (10s) | - | 300 | °C |
| ESD protection voltage (HB Model) | - | ±2 | KV |
Recommended Operating Conditions
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| AVDD28 | 2.8 | - | 3.3 | V |
| VDDIO | 1.8 | - | 3.3 | V |
| Working temperature | -20 | 25 | 85 | °C |
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| GT911-A1 | Goodix | QFN-52 |
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