近期，基於人體存在傳感器的應用與日俱增，例如眾多物聯網設備。不過，熱釋電紅外傳感器要實現穿透玻璃探測比較困難。這造成了許多產品設計限制。據麥姆斯諮詢報導，Asahi Kasei Electronics（AKM，旭化成電子）開發出了AK9752，一款短距離應用的人體存在紅外傳感器（探測距離約1m）。它能夠穿透玻璃探測，適用於精巧設計的便攜式筆記本電腦和家居信息產品等。
AK9752集成了AKM原創的InSb（銻化銦）量子紅外傳感器，其模擬前端電路能夠將紅外傳感器的電流輸出轉化為電壓變化，專用溫度計能夠測量紅外傳感器的溫度，還包含一個16位模數轉換器、I2C接口以及中斷輸出功能。
AKM發布全球最小尺寸級別的紅外傳感器IC
- 能夠穿透玻璃探測
熱釋電紅外傳感器無法穿透玻璃探測。 AKM的前代產品AK9750，無法探測能夠穿過玻璃的5um及以下波長的紅外線。新款AK9752能夠高靈敏地探測5um及以下波長的紅外線，因此能夠穿透玻璃探測物體，在玻璃厚度小於等於0.7mm時，其探測距離可達1m。它能夠穿過玻璃探測人體，理想地適用於那些表面為玻璃的家居信息設備，使這些設備的設計無需為玻璃表面而煩惱。
- 無需鏡頭（探測距離1m）
AK9752無需鏡頭，有效探測距離最高可達1m。採用非常緊湊的超薄封裝，為信息終端設備提供了靈活的設計空間。
- 全球最小尺寸級別的紅外傳感器IC，採用超緊湊的超薄封裝
封裝：6-pin SON （2.2 x 2.2 x t0.6 mm）
- 內置溫度計
AK9752能夠測量紅外傳感器元件的溫度。
- 低功耗
AK9752具有低功耗優勢。 （供電：典型電壓1.8V，功耗：10Hz輸出時最大功耗100uA）。其中斷功能還可以配合外部微控制器幫助維持低功耗運行。在電池驅動的系統中可以長時間穩定運行。
Recently the number of applications that use human presence sensors have increased, such as among IoT equipment. However, pyroelectric type sensors are hard to detect objects through glass. This was causing design constraints in the products. Asahi Kasei Electronics Corporation, (AKM), has developed the AK9752, a human presence sensor for short range applications, (detection distance about 1m). It is capable of detection through glass and suitable sophisticated designed Portable PCs and home information products.
The AK9752 integrates AKM’s original InSb quantum IR sensor element, an analog front end circuit that converts current output of the element into voltage, a dedicated thermometer to measure the element temperature, a 16-bit A/D converter (ADC), an I2C interface and an interrupt output.
● Capable of Detection through Glass
The pyroelectric type sensors cannot detect objects through glass. AKM’s previous product, the AK9750 shuts out infrared rays under 5μm wavelength that are able to pass through glass. The AK9752 can detect objects through glass since it’s able to detect infrared wavelengths of 5μm or less with high sensitivity, achieving a detection distance of 1m with a glass thickness of 0.7mm or less. It’s capable of detecting humans through glass and is ideal for home information devices such as a glass top device without having design compromises.
● Lens-less Device (detection distance: 1m)
The AK9752 does not need a lens to work up to 1m detection distances. It is housed in a very compact and thin package, providing flexible designability of information terminal devices.
● Smallest Class Infrared Sensor IC in the World, Ultra-Compact and Thin Package
Package: 6-pin SON (2.2 x 2.2 x t0.6 mm)
[Notes] * According to AKM as of January 1st, 2017
● Built-in Thermometer
The AK9752 can measure the temperature of IR sensor element.
● Low Power Consumption
The AK9752 achieves low power consumption. (Power supply: Typ. 1.8 V, Power consumption: Max. 100μA @ 10Hz Output). An interrupt function also helps sustain low power consumption operation with an external microcontroller. It enables long-time operation with a battery driven system.
Source:AKM
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