CM32181 | DigiCamel IC Datasheet

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Document overview

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PDF pages: 16

Technical content

Features

Filtron™ technology adoption : excellent responsivity : close to real human eye responses
High sensitivity: minimum detectable intensity 0.005 Lux/Bit supports low transmittance(dark) lens design
O-Trim™ technology adoption : ALS output tolerance: ± 10%
Support various Low power modes.
Excellent temperature compensation: -40 to 85ºC
High dynamic detection resolution
Standard I2C protocol interface
Interruption feature (INT) support Programmable interrupt function with upper and lower thresholds. Adjustable persistence to prevent false triggers.
Fluorescent light flicker immunity
Software shutdown mode control
Operation voltage from 2.5V to 3.6V
Ambient light strength detection range over 100K Lux
Package: OPLGA (2.35 x 1.8 x 1.0 mm)
Lead-free package (RoHS compliant)

Applications

Notebook, Tablet, TV
Mobile Phone, Smart-phone, PDA
Automotive Pin Definition OPLGA <Top View>

1 Ground 4 Address Select

2 I2C Data 5 I2C Clock

3 Interrupt 6 Power

Low Power, High Sensitivity I2C Ambient Light Sensor Confidential for Archtech

Ordering Information

PART NUMBER PACKING PACKAGE PIN NO. QUANTITY LEAD FREE REMARK CM32181A3OP Tape and Reel 2.35 x 1.8 x 1.0mm 6 2500 Compliant Absolute Maximum Ratings Recommended Operating Conditions Pin Descriptions PIN ASSIGNMENT SYMBOL TYPE FUNCTION 1 GND I Power supply ground. All voltages are referenced to GND

2 SDAT I/O (Open Drain) I2C digital serial data output to the host

3 INT O (Open Drain) Interrupt pin. (Active low).

4 ADDR

Address Select. Pull high to select address 0x48 or low to select address 0x10

5 SCLK I I2C digital serial clock input from the host

6 VDD I Supply voltage

PARAMETER SYMBOL MIN MAX UNIT CONDITION Storage temperature TS -40 +100 °C Operating temperature TA -40 +85 °C Supply voltage VDD 0 4 V PARAMETER SYMBOL MIN MAX UNIT CONDITION Operating temperature TA -40 +85 °C Supply voltage VDD 2.5 3.6 V I2C operating frequency f(I2CCLK) 10 400 kHz Confidential for Archtech

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 Electrical & Optical Specifications PARAMETER SYMBOL MIN TYP MAX UNIT CONDITION Peak sensitivity wavelength λP 550 nm I2C signal input Logic High VIH 1.2 VDD V Note1 Logic Low VIL — 0.4 Output Low Voltage SDA VOL 0 0.4 V 3mA sink current Detectable intensity Minimum 0.005 LUX Note 1,2 (ALS_SM = “01”) Maximum 167000 Note 1,2 (ALS_SM = “10”) Dark offset 3 STEP Note 1,2 (ALS_SM = “01”) Supply operation voltage VDD 2.5 3.3 3.6 V Supply current IDD μA Note 1,2,3 (PSM=11,refresh time:4500ms)

6 Note 1,2,3

(PSM=00,refresh time:600ms) Note 1,2 (PSM_EN=0,refresh time:100ms) Shutdown current IDD (SD) 0.5 uA Light Condition = Dark, Note 1 Note: 1. Test condition: VDD = 3.3V, Temperature: 25°C. 2. Light source: White LED. 3. Power saving mode enable Confidential for Archtech

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 Command Register Format There are 6 command codes provided by CM32181. Formats of these command code and registers’ definition explanations are shown in below Table 1. Command code Register Name Bit Function/Description R/W

00 Reserved 15:13 Set 000b W

ALS_SM 12:11 Sensitivity mode selection 00 = ALS Sensitivity x 1 01 = ALS Sensitivity x 2 10 = ALS Sensitivity x (1/8) 11 = ALS Sensitivity x (1/4) W Reserved 10 Set 0b W ALS_IT 9:6 ALS integration time setting 1100 = 25ms 1000 = 50ms 0000 = 100ms 0001 = 200ms 0010 = 400ms 0011 = 800ms W ALS_PERS 5:4 ALS Persistence protect number setting 00 = 1 01 = 2 10 = 4 11 = 8 W Reserved 3:2 Set 00b W ALS_INT_EN 1 ALS Interrupt enable setting 0 = ALS INT Disable 1 = ALS INT Enable W ALS_SD 0 ALS shut down setting 0 = ALS Power On 1 = ALS Shut down W

01 ALS_WH 15:8 ALS High Threshold Window setting(MSB) W

ALS_WH 7:0 ALS High Threshold Window setting(LSB) W

02 ALS_WL 15:8 ALS Low Threshold Window setting(MSB) W

ALS_WL 7:0 ALS Low Threshold Window setting(LSB) W

03 Reserved 15:3 Set 0000 0000 0000 0b W

PSM 2:1 Power Saving Mode 00 = Mode1 01 = Mode2 W Confidential for Archtech

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 10 = Mode3 11 = Mode4 Please refer to Table 2 PSM_EN 0 Power Saving Mode enable setting 0 = Disable 1 = Enable W

04 ALS 15:8 MSB 8bits data of whole ALS 16bits R

ALS 7:0 LSB 8bits data of whole ALS 16bits R

05 Reserved 15:0

R

06 ALS_IF_L 15 ALS crossing Low threshold INT trigger event R

ALS_IF_H 14 ALS crossing High threshold INT trigger event R

07 Reserved 13:0 R

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 Command code 00(HEX) 1. Bit 12:11 defines ALS sensitivity mode. Bit 12 Function

00 ALS Sensitivity x 1

01 ALS Sensitivity x 2

10 ALS Sensitivity x (1/8)

11 ALS Sensitivity x (1/4)

Bit 9:6 defines ALS integration time setting which represents how long ALS can update the readout value. Bit 9:6 Function 1100 25ms 1000 50ms 0000 100ms 0001 200ms 0010 400ms 0011 800ms 3. Bit 5:4 defines ALS interrupt persistence setting. The interrupt pin is triggered while sensor reading is out of threshold windows after consecutive number of measurement cycle. Bit 5:4 Measurement cycle 00 1 01 2 10 4 11 8 4. Bit 1 defines whether to enable interrupt function or not. Bit 1 Function

0 INT Disable

1 INT Enable

Bit 0 defines how to power on and shut down sensor setting. Bit 0 Function

0 Power on

1 Shutdown

Command code 01(HEX) Once enable INT function and use High/Low windows threshold, Bit 15:0 provides 16 bit register for High bound threshold window setting. Bit Function 15:8 High Threshold Window setting(MSB) 7:0 High Threshold Window setting(LSB) Command code 02(HEX) Once enable INT function and use High/Low windows threshold, Bit 15:0 provides 16 bit register for Low bound threshold window setting. Bit Function 15:8 Low Threshold Window setting(MSB) 7:0 Low Threshold Window setting(LSB) Command code 03(HEX) 1. Bit 2:1 defines Power Saving mode which provides various power consumption, sensitivity, and refresh time combinations. Please refer to Table2. Bit 2:1 Function

00 Mode1

01 Mode2

10 Mode3

11 Mode4

Bit 0 defines whether to enable power saving mode or not. Bit 0 Function

0 Disable

1 Enable

Command code 04(HEX) To access 16-bit high resolution ALS output data, it’s suitable to follow read protocol to read from Command code 04 16 bits register. Bit Function 15:8 MSB 8bits data of whole 16bits 7:0 LSB 8bits data of whole 16bits Confidential for Archtech

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 Command code 06(HEX) 1. Bit 15 defines interrupt flag while trigger occurred due to data crossing low threshold windows. Bit 15 Function

0 Interrupt not triggered

1 Interrupt occurred

Bit 14 defines interrupt flag while trigger occurred due to data crossing high threshold windows. Bit 14 Function

www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. CM32181’s refresh time can be determined by PSM and ALS_IT setting in Power Saving Mode(PSM) . consumption and sensitivity for light data collection. Table 2. Refresh Time, Idd and sensitivity Relation Table CM32181 can memorize the last ambient light data before shutdown and keep this data before waking up. CM32181 wakes up, the data will be refreshed by the new detection.

I R reflow profile conditions
Recommended normal solder reflow is: 235 ~ 255 ℃.

Figure 12. CM32181 Solder Reflow Profile Chart

High Sensitivity I2C Ambient Light Sensor www.capellamicro.com © Copyright 2013, Capella Microsystems, Inc. Serial No. 201307190009 Serial No. 201307190009 Recommended Iron Tip Soldering Condition and Warning Handling

1 Solder the device with the following conditions:

1.1 Soldering temperature: 400 ℃ (Max.) 1.2 Soldering time: 3 seconds (Max.) 2 If the temperature of the method portion rises in addition to the residual stress between the leads, the possibility that open or short circuit occurs due to the deformation or destruction of the resin increases. 3 The following methods: VPS, and wave soldering are not suggested for the component assembly.

4 Cleaning method condition:

4.1 Solvent: Methyl Alcohol, Ethyl Alcohol, and Isopropyl Alcohol. 4.2 Solvent temperature < 45 ℃ (Max.); 4.3 Time: 3 minutes (Min.) Confidential for Archtech

Product Information

CM32181 specifications and overview.

Summary

Low Power, High Sensitivity I2C Ambient Light Sensor

Description

Low Power, High Sensitivity I2C Ambient Light Sensor

Source title CM32181 Datasheet(PDF) - List of Unclassifed Manufacturers

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