ak4182 AKM Semiconductor, Inc., ak4182 Datasheet
ak4182
Available stocks
Related parts for ak4182
ak4182 Summary of contents
Page 1
... On-chip VREF can be utilized for analog auxiliary input, temperature measurement and battery monitoring with the ability to measure voltage from 0V to 5V. The AK4182 also has an on-chip temperature sensor. The AK4182 is available in 16pin QFN thin package (0.75mm in height) and has the operating temperature range of -40°C to +85°C Control ...
Page 2
... ASAHI KASEI Ordering Guide -40°C ∼ +85°C AK4182VN Pin Layout MS0411-E-00 16pinQFN DOUT VCC XP PENIRQN YP IOVDD XN VREF 2 [AK4182] 2005/08 ...
Page 3
... DIN I Serial Data Input Inputs 8-bit control command data serially when CSN= “L” AK4182 latches at the rising edge of DCLK. Must keep “L” while not issuing commands. 15 CSN I Chip Select Input Enables writing data to the registers when CSN= “L”. ...
Page 4
... WARNING: AKM assumes no responsibility for the usage beyond the conditions in this datasheet. MS0411-E-00 Absolute Maximum Ratings Symbol Min VCC -0.3 IOVDD -0.3 IIN - VIN -0.3 IOUTDRV Ta -40 Tstg -65 Symbol Min VCC 2.7 IOVDD 1.5 4 [AK4182] max Units 6.0 V 6.0 V ±10 mA 6.0(VCC+0. °C 85 °C 150 typ max Units 3.3 3.6 V 3.3 VCC ...
Page 5
... Note 3. “Ideal” value derived from theory Note 4. Accuracy is defined as the difference between the voltage measured by two current sources, and the ideal voltage derived from theory at specific temperatures. MS0411-E-00 Analog Characteristics min 11 0 2.44 0.1 5 -40 5 [AK4182] typ max Units 12 Bits 12 Bits ±2 LSB ±1 LSB Vref V ± ...
Page 6
... PD0 D11 Figure 1 AK4182 Timing Diagram 6 [AK4182] typ max Units - V - 0.2xIOVDD V µ 0.4 V µA 10 µA 50 typ max Units 125 kHz 2100 kHz µs ...
Page 7
... The SAR A/D converter output is a straight binary format as shown below: (∆VREF-1.5LSB)~ ∆VREF (∆VREF-2.5LSB) ~ (∆VREF-1.5LSB) The full scale (∆VREF) of the A/D converter depends on the input mode. The AK4182 is controlled by the 8 bit serial command on DIN. Analog Inputs Analog input is selected via the A2, A1, A0 and SER/ DFR bits in the control register. If the analog inputs are selected to the X or Y-axis, SER/ DFR = “ ...
Page 8
... X-position, Y-Position, and Z1-Position, and then using the following formula: Rtouch = (Rxplate*Xposition/4096)*[(4096/Z1) – 1] – Ryplate*[1 – (Yposition/4096)] MS0411-E-00 XP VREF YP ADC VREF Y-Position Measurement Differential Mode Figure 2 Axis Measurement 8 [AK4182 AIN+ YP AIN 2005/08 ...
Page 9
... Z1-Position Measurement Differential Mode Voltage Reference The AK4182 has an internal 2.5V voltage reference. This reference can be turned ON when PD1 = “1”, and OFF when PD1 = “0”. This reference is used in the single-ended mode for the battery monitoring, temperature measurement, or for auxiliary input. A 0.1µ ...
Page 10
... I As the AK4182 has two different fixed current circuits and a diode (temperature sensor), the temperature can be measured by using two different methods. The first method needs two conversions, but can derive the temperature directly without knowing the voltage at a specific temperature. From equation < ...
Page 11
... AK4182 Control Command The control command, 8 bits, provided to the AK4182 via DIN is shown in the following table. This command includes start bit, channel selection, resolution, measurement configuration, and power-down mode. The AK4182 latches the serial command at the rising edge of DCLK. Refer to the detailed information regarding the bit order, function, the status of driver switch, ADC input, reference voltage as shown in Table 2 ...
Page 12
... AK4182 supports sleep mode that enables touch panel to put open state and disables pen interrupt function. AK4182 goes into sleep mode when AK4182 gets the sleep control command. The selection of the Sleep mode is set by “MODE” bit. The state of both the output of PENIRQN pin and the connection with touch panel interface (XP, YP, XN, and YN) are the following Table 3. ...
Page 13
... BUSY and DOUT goes to “L” from Hi-Z state at the falling edge of CSN. The AK4182 latches the 8bit control word serially via DIN at the rising edge of DCLK. As the AK4182 starts the command decoding at the first “H” bit after CSN= “ ↓ ”, MSB (S bit) of the command must be “ ...
Page 14
... ASAHI KASEI Pen Interrupt The AK4182 has pen interrupt function to detect the pen touch. Pen interrupt function is enabled at power-down state. YN pin is connected to GND at the PEN interrupt enabled state. And XP pin is pulled up via an internal resistor (Ri), typically 50k Ω touch plate is pressed by pen, the current flows via <VCC> – <Ri> – <XP> –<the plates> - <YN>- <GND>. The resistance of the plate is generally 1K Ω ...
Page 15
... CSN=”L”, PD0 = 1, NOT “CONV period” (CSN & (!(PD1& PD0)); /* CSN=”H”, (PD0, PD1) is not (1,1) */ MS0411-E-00 Region SER/ PD0 PD1 DFR [AK4182] Region iii 2005/08 ...
Page 16
... Note: The thermal die pad is tie to PCB substrate (GND). Package & Lead frame material Package molding compound: Epoxy Lead frame material: Cu Lead frame surface treatment: Solder (Pb free) plate MS0411-E-00 Package BOTTOM VIEW 2.1 ± 0. 0.10 0.3 ± 0.05 PIN #1 I.D. (0. EXPOSED THERMAL DIE PAD 16 [AK4182] #13 #16 M × 2005/08 ...
Page 17
... ASAHI KASEI . MS0411-E-00 Marking 4182 XXXX 1 XXXX: Date code identifier (4 digits) 17 [AK4182] 2005/08 ...
Page 18
... AKM harmless from any and all claims arising from the use of said product in the absence of such notification. MS0411-E-00 IMPORTANT NOTICE 18 [AK4182] 2005/08 ...