CST9191 Description/概述：
Using low power CMOS process, the CST9191 is designed for low power, high performance unipolar detection hall-effect application, such as cover switch,contactless switch, solid state switch and lid close sensor etc battery operation. The hall IC integrated an on-chip hall voltage generator for magnetic sensing, a comparator that amplifiers the hall voltage, a Chopper amplifier, a Schmitt trigger to provide switching hysteresis for noise rejection, and a complementary output.
The total power consumption of CST9191 is typically less than 1.8uA at 3.3V power supply.CST9191 is designed to respond to alternating North pole. When the magnetic flux density (B) is larger than operate point (BOPN), the output will be turned on (low), the output is held until the magnetic flux density (B) is lower than release point (BRPN), then turn off (high).
The device is available in SIP-3L, SOT553,SSOT23-3L and SOT23-3L Package and is rated over the -40°C to 85°C. The package is RoHS and Green compliant.
CST9191采用低功耗CMOS工藝，設(shè)計(jì)用于低功耗、高性能單極檢測(cè)大廳效應(yīng)應(yīng)用，如蓋開關(guān)、非接觸開關(guān)、固態(tài)開關(guān)、蓋關(guān)閉傳感器等電池操作?；魻柤呻娐芳闪艘粋€(gè)用于磁傳感的片上霍爾電壓發(fā)生器，一個(gè)放大霍爾電壓的比較器，一個(gè)斬波放大器，一個(gè)施密特觸發(fā)器來(lái)提供開關(guān)滯后的噪聲抑制，以及一個(gè)互補(bǔ)輸出。
CST9191在3.3V電源條件下的總功耗通常小于1.8uA。CST9191被設(shè)計(jì)用來(lái)應(yīng)對(duì)交替的北極。當(dāng)磁通密度(B)大于操作點(diǎn)（BOPN）時(shí)，輸出將打開（低），保持輸出，直到磁通密度(B)低于釋放點(diǎn)（BRPN），然后關(guān)閉（高）。
該設(shè)備可采用SIP-3L、SOT553、SSOT23-3L和SOT23-3L封裝，額定功率高于-40°C至85°C。該包裝符合RoHS和綠色標(biāo)準(zhǔn)。
CST9191 Features/特性：
Input Voltage Range : 1.65V to 5.5V
Micro-power consumption ideal for battery power applications
Uniplar Operation, easy to use as output
Very high sensitivity hall sensor
Low Power CMOS process technology
Chopper stabilization amplifier stage
Magnetic Sensitivity (typical) BOP=±42Gauss, BRP=±25Gauss
Good RF noise immunity
No need pull-up resistor
Small Solution Size
RoHS & Green Compliant
SIP-3L, SOT23-3L, SSOT23-3L and SOT553 Package
-40℃ to +85 ℃ Temperature Range
CST9191 Applications/應(yīng)用：
Cover switch in clam-shell cellular phones
Cover switch in Notebook, PC/PAD
Contact-less switch in consumer products
Solid State Switch
Handheld Wireless Handset Awake Switch
Lid close sensor for battery-powered devise
Magnet proximity sensor for reed switch replacement in low duty cycle applications
DV, DSC, and White Goods
CST9191 Ordering Information:
|
Part Number
|
BOP(Gauss)
|
BRP (Gauss)
|
Package Type
|
Package Qty
|
Temperature
|
Eco Plan
|
|
CST9191S2RN |
+42 |
+25 |
SSOT23-3L |
7-in reel 3000pcs/reel |
-40～85℃ |
Green |
|
CST9191WRN |
-42 |
-25 |
SOT553 |
7-in reel 3000pcs/reel |
-40～85℃ |
Green |
CST9191 Marking & Pin Assignment:
CST9191 Typical Application Circuit:
CST9191 Block Diagram:
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