MPXY8020A MOTOROLA | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 16
Technical content
1Motorola Sensor Device Data ! /C0070"# /C0073 ! /C0079"! GENERAL DESCRIPTION The Motorola MPXY8020A is an 8–pin tire monitoring sensor which is comprised of a variable capacitance pressure sensing element, a temperature sensing element, and an interface circuit (with a wake–up feature) all on a single chip. It is housed in a Super–Small Outline Package (SSOP), which includes a media protection filter. Specifically designed for the low power consumption requirements of tire pressure monitoring systems, it can combine with a Motorola remote keyless entry (RKE) system to facilitate a low–cost highly integrated system. Detailed Description The block diagram of the MPXY8020A is shown in Figure 1. The pressure sensor is a capacitive transducer constructed using surface micromachining, the temperature sensor is constructed using a diffused resistor, and the interface circuit is integrated onto the same die as the sensors using a standard silicon CMOS process. The conditioning of the pressure signal begins with a capacitance to voltage conversion (C to V) followed by a switched capacitor amplifier. This amplifier has adjustable offset and gain trimming. The offset and gain are factory calibrated, with calibration values stored in the EEPROM trim register. This amplifier also has temperature compensation circuits for both sensitivity and offset, which also are factory–adjusted using the EEPROM trim register. The pressure is monitored by a voltage comparator, which compares the measured value against an 8–bit threshold adjusted by a serial input. By adjusting the threshold and monitoring the state of the OUT pin the external device can check whether a low–pressure threshold has been crossed, or perform up to 8–bit A/D conversions. The temperature is measured by a diffused resistor with a positive temperature coefficient driven by a current source, thereby creating a voltage. The room temperature value of this voltage is factory–calibrated using the EEPROM trim register. A two–channel multiplexer can route either the pressure or temperature signal to a sampling capacitor that is monitored by a voltage comparator with variable threshold adjust, providing a digital output for temperature. An internal low frequency, low power 5.4 kHz oscillator with a 14–stage divider provides a periodic pulse to the OUT pin (divide by 16384 for 3 seconds). This pulse can be used to wake up an external MCU to begin an interface with the device. An additional 10–stage divider will provide a pulse every 52 minutes which can be used to reset an external MCU. The power consumption can be controlled by several operational modes selected by external pins. REV 1.0 Order this document by MPXY8020A/D /C0079/C0079/C0079 SEMICONDUCTOR TECHNICAL DATA SUPER SMALL OUTLINE PACKAGE CASE 1352
ORDERING INFORMATION
Shipped in Rails Shipped in Tape & Reel MPXY8020A6U MPXY8020A6T1 TIRE PRESSURE MONITORING SENSOR OPTIMIZED FOR 250 kPa – 450 kPa Motorola, Inc. 2003 Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
2 Motorola Sensor Device Data
Figure 1. MPXY8020A Block Diagram The pinout for this 8–pin SSOP device is shown in Figure 2. Figure 2. MPXY8020A Device Pinout Freescale Semiconductor, Inc.
- In all the modes listed the channel multiplexers, D/A Reg-
pacitor before powering down the measuring circuitry. be driven LOW to avoid powering up the device. drawn from the device driving input. Table 1. Operating Modes Power is supplied to the control IC through VDD and VSS . ground. The control IC operates from a single power supply. Figure 3. Recommended Power Supply Connections Freescale Semiconductor, Inc.
4 Motorola Sensor Device Data
Figure 4. Pulse on OUT Pin During Standby Mode
- Since the RST pin is clocked from the same divider string
when the RST pin pulses every 52 minutes. Figure 5. Pulse on RST Pin PROM trim register is also supplied through the S1 pin. the threshold of the voltage comparator. Freescale Semiconductor, Inc.
select bits is shown in Table 2. Table 2. D/A Threshold Bit Assignments read interval is longer than the specified hold time, tSH . duce noise in the captured pressure or temperature data. Standby or Output Read Modes. the CLK pin with eight (8) clock pulses. Figure 6. Serial Data Timing when the temperature channel is selected. Freescale Semiconductor, Inc.
6 Motorola Sensor Device Data
APPLICATIONS
Suggested application example is shown in Figure 7. Figure 7. Application Example those shown in the table below. Keep VIN and VOUT within the range VSS ≤ (VIN or VOUT ) ≤ VDD . Freescale Semiconductor, Inc.
7Motorola Sensor Device Data Operating Range The limits normally expected in the application which define range of operation. Characteristic Symbol Min Typ Max Units Supply Voltage VDD 2.1 3.0 3.6 V Operating Temperature Range Standard Temperature Range TA TL –40 — TH +125 °C Supply Current Drain Standby Mode –40°C to +85°C +85°C to +100°C +100°C to +125°C Read Mode –40°C to +125°C Measure Temperature Mode –40°C to +125°C Measure Pressure Mode –40°C to +10°C +10°C to +60°C +60°C to +125°C Istby Istby Istby Iread Itemp Ipress Ipress Ipress 0.6 0.8 1.5 400 400 1400 1300 1200 0.9 1.2 2.2 600 600 1800 1700 1700 µA µA µA µA µA µA µA µA Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
8 Motorola Sensor Device Data
Electrical Characteristics
+2.1 V ≤ VDD ≤ +3.6 V, TL ≤ TA ≤ TH , unless otherwise specified. Characteristic Symbol Min Typ Max Units Output High Voltage DATA, OUT, RST (ILoad = 100 µA) VOH VDD –0.8 — — V Output Low Voltage DATA, OUT, RST (ILoad = –100 µA) VOL — — 0.4 V Input High Voltage S1, S0, DATA, CLK VIH 0.7 x VDD — — V Input Low Voltage S1, S0, DATA, CLK VIL VSS — 0.3 x VDD V Input Hysteresis (VIH – VIL) S1, S0, DATA, CLK VHYS 100 200 — mV Input Low Current (at VIL) S1, S0, DATA, CLK IIL –5 –25 –100 µA Input High Current (at VIH) S1, S0, DATA, CLK IIH –5 –35 –140 µA Temperature Measurement (+2.5V≤Vdd≤3.0V) D/A Conversion Code at –40°C D/A Conversion Code at –20°C D/A Conversion Code at 25°C D/A Conversion Code at 70°C D/A Conversion Code at 100°C D/A Conversion Code at 120°C D/A Conversion Code at 125°C T–40 T–20 T25 T70 T100 T120 T125 155 204 241 249 102 163 214 252 255 107 171 224 255 255 counts counts counts counts counts counts counts Temperature Measurement (+2.1V≤Vdd≤3.6V) D/A Conversion Code at –40°C D/A Conversion Code at –20°C D/A Conversion Code at 25°C D/A Conversion Code at 70°C D/A Conversion Code at 100°C D/A Conversion Code at 120°C D/A Conversion Code at 125°C T–40 T–20 T25 T70 T100 T120 T125 154 203 240 249 102 163 214 252 255 107 172 225 255 255 counts counts counts counts counts counts counts Temperature Sensitivity at 25°C — 0.80 — °C/bit Approximate Temperature Output Response OUT = 74.7461 +0.9752 x Ta + 0.0041 x Ta^2 counts –40 –20 0 20 40 60 80 100 120 Temperature Error vs. Temperature (VDD = 3 V) Temperature (C) Temperature Error (C) Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
+2.1 V ≤ VDD ≤ +3.6 V, TL ≤ TA ≤ TH , unless otherwise specified. Figure 8. Control Timing Test Load for OUT and RST Pins Freescale Semiconductor, Inc.
10 Motorola Sensor Device Data
SENSOR CHARACTERISTICS (MPXY8020A) Pressure Transfer Function kPa = 2.5 × Output ± (Pressure Error) Output = 8–bit digital pressure measurement (between 0–255) Pressure Error (kPa): 50 kPa P 250 kPa Pressure Error (kPa): 250 kPa P 450 kPa Pressure Error (kPa): 450 kPa P 600 kPa Areas marked in grey indicate the typical operating range. Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
12 Motorola Sensor Device Data
Maximum ratings are the extreme limits to which the device can be exposed without permanently damaging it. Keep VIN and VOUT within the range VSS ≤ (VIN or VOUT ) ≤ VDD . Rating Symbol Value Unit Maximum Pressure (1) pmax 1400 kPa (1) Centrifugal Force Effects (3 axis) Pressure measurement change less than 1% FSS gCENT 2000 g Unpowered Shock (three sides, 0.5 mSec duration) gshock 2000 g NOTES: 1. Tested for 5 min at 25°C Media Compatibility Media compatibility is as specified in Motorola document “SPD TPM Media Test.” Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
13Motorola Sensor Device Data PACKAGE DIMENSIONS CASE 1352–01 ISSUE O D E e/2 N e /C0048/C0048/C0048/C0052/C0048/C0049 A A B C !%$ /C0049 ! %#! %#"#% ! $ %! # $ "# $ */C0049/C0052/C0049/C0052 ! $ /C0049 ! !% & ! ! $ ! $ !# ! $ $ !% ) /C0048/C0048/C0048 /C0048/C0049 "# $ /C0052 ’#% ! , !$ !% & # /C0048/C0048/C0048 /C0048 /C0048 /C0048/C0048/C0048/C0052/C0048/C0049 /C0048/C0048/C0048/C0048/C0049 /C0069 DETAIL G L θ .014 (0.35) b /C0069/C0073 DETAIL G /C0069/C0073 /C0069 P /C0068/C0073 /C0073 /C0073 /C0073/C0073/C0069/C0069 /C0048/C0049 /C0048/C0049 /C0052/C0052/C0052 /C0073 /C0069 /C0048/C0048/C0048 /C0048/C0048/C0049/C0048 /C0048/C0048 /C0048 /C0048/C0048/C0049/C0052 /C0048/C0048/C0049 /C0048 /C0048/C0052 /C0068/C0048 /C0048 /C0048 /C0048/C0048 /C0049/C0049 /C0069/C0048/C0052/C0048/C0048 /C0048/C0052 /C0048 /C0049/C0048/C0049 /C0049/C0048 /C0069/C0048 /C0048 /C0048 /C0048/C0048 /C0049/C0049 /C0048/C0048/C0049 /C0048/C0048 /C0048 /C0048 /C0048 /C0048 /C0049 /C0052/C0049 /C0048/C0048/C0048 /C0048/C0048/C0049/C0049 /C0048 /C0048 /C0048/C0049/C0052/C0048 /C0048/C0049/C0048 /C0052/C0048 /C0048 /C0048 /C0048/C0048/C0048$ °°°° /C0049 θ /C0069 Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
14 Motorola Sensor Device Data
iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
15Motorola Sensor Device Data NOTES Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...
16 Motorola Sensor Device Data
Information in this document is provided solely to enable system and software implementers to use Motorola products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document. Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters that may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”, must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. MOTOROLA and the Stylized M Logo are registered in the US Patent and Trademark Office. All other product or service names are the property of their respective owners. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Motorola Inc. 2003 HOW TO REACH US: USA/EUROPE/LOCATIONS NOT LISTED : JAPAN : Motorola Japan Ltd.; SPS, Technical Information Center, Motorola Literature Distribution 3–20–1, Minami–Azabu, Minato–ku, Tokyo 106–8573, Japan P.O. Box 5405, Denver, Colorado 80217 81–3–3440–3569 1–800–521–6274 or 480–768–2130 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong 852–26668334 HOME PAGE : http://motorola.com/semiconductors MPXY8020A/D◊ Freescale Sem iconductor, I Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com nc...