640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
The GH-LWA-612AC is an uncooled long-wave infrared photodetector, a type of vox detector, that uses an uncooled microbolometer with vanadium oxide material to convert infrared radiation into electrical signals. It can be integrated into infrared thermal imaging cameras. The GH-LWA-612AC is a focal plane array composed of a silicon-based readout circuit and a MEMS pixel array with a 12μm pixel size. It is vacuum-sealed within a ceramic package without a thermoelectric cooler (TEC).
Specification of 640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
640x512 array size
12μm pixel size
Operating wavelength range: 8μm to 14μm
Frame rate: 25~60Hz
NETD < 40mK (F/1, 300K, 50Hz)
Thermal time constant: 8-10ms
Power supply: VSK=4.6V (typical), VDDA=3.6V, VDDD=1.8V
Low power consumption<150mW @50Hz
Fully digital interface, no external DAC/ADC required
Digital interface, 4-port 16-bit digital output with synchronous clock, 4-bit single-port input pixel OCC, external frame synchronization and asynchronous reset,<100MHz input clock @60fps
Supports applications without TEC and shutter
Operating temperature range: -40°C to +65°C
Available in 36PIN PGA, 32PIN PGA, 30PIN PGA, 32PIN PGA dual-row ceramic package
Package dimensions: 24x24x3.9mm, 22x22x3.9mm, 20x20x4.1mm, 22.86x22.86x4.5mm
Applications of 640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
Observation and targeting
Industrial temperature measurement
Security surveillance
Firefighting and rescue
Automotive night vision
Building inspection
Medical and health
Product Focus of 640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
The GH-LWA-612AC uses a digital readout with a built-in 14-bit column-level ADC and outputs data through a 4-port CMOS format. The data format can be configured as binary or Gray code, with a single-port data rate of 78Mbps @50fps. The GH-LWA-612AC also provides a synchronous sampling clock (ADSCL) for data synchronization.
The GH-LWA-612AC adopts a simple power supply and reference input method. The analog power supply is 3.6V, the detector's low-noise power supply VSK is typically 4.6V (adjustable based on noise and gain requirements), and the external low-noise reference input is 2.5V. The digital power supply VDDD is 1.8V (VDDD and VDDIO can be separated, and VDDIO supports 1.8-3.3V).
The GH-LWA-612AC features a new low-power readout architecture, with total power consumption under 130mW at a high frame rate of 50Hz, minimizing the impact of detector heat on performance.
The GH-LWA-612AC supports on-sensor 4-bit per-pixel offset NUC, global offset correction, and temperature drift correction to ensure dynamic range of the readout.
The GH-LWA-612AC allows adjustment of the channel response in multiple dimensions, meeting the wide dynamic range needs of industrial temperature measurement, and supports achieving the best signal-to-noise ratio in high-gain + long integration time mode.
640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
Figure 1. Functional Block Diagram of the GH-LWA-612AC Detector (only essential connection pins labeled)
Specifications of 640×512/12μm Array Uncooled Infrared Focal Plane Microbolometer GH-LWA-612AC
Description of the operational rate index
The detector operability is greater than 99.5%, i. e., within the 640 x 512 array region.
(1) No bad line or bad row.
(2) The maximum number of bad cluster size in the central area (160×120) shall not exceed 8 blind pixels.
(3) The maximum number of bad clusters outside the central area does not exceed 14 blind pixels, and the number of clusters with 9 to 14 blind pixels does not exceed
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