 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ADS1294_1005 Datasheet(PDF) 20 Page - Texas Instruments |
|
||||||||||||||||||||||||||||||
ADS1294_1005 Datasheet(HTML) 20 Page - Texas Instruments |
|
|
20 / 75 page  Temperature( C)= ° TemperatureReading( V) 145,300 V m - m 490 V/ C m ° +25 C ° 2x 1x 1x 8x AVDD AVSS TemperatureSensorMonitor ToMUXTempP ToMUXTempN ADS1294 ADS1296 ADS1298 SBAS459D – JANUARY 2010 – REVISED MAY 2010 www.ti.com Device Noise Measurements Setting CHnSET[2:0] = 001 sets the common-mode voltage of (AVDD + AVSS)/2 to both inputs of the channel. This setting can be used to test the inherent noise of the device in the user system. Test Signals (TestP and TestN) Setting CHnSET[2:0] = 101 provides internally-generated test signals for use in sub-system verification at power-up. This functionality allows the entire signal chain to be tested out. Although the test signals are similar to the CAL signals described in the IEC60601-2-51 specification, this feature is not intended for use in compliance testing. Control of the test signals is accomplished through register settings (see the CONFIG2: Configuration Register 2 subsection in the Register Map section for details). TEST_AMP controls the signal amplitude and TEST_FREQ controls switching at the required frequency. The test signals are multiplexed and transmitted out of the device at the TESTP_PACE_OUT1 and TESTN_PACE_OUT2 pins. A bit register (CONFIG2.INT_TEST = 0) deactivates the internal test signals so that the test signal can be driven externally. This feature allows the calibration of multiple devices with the same signal. The test signal feature cannot be used in conjunction with the external hardware pace feature (see the External Hardware Approach subsection of the ECG-Specific Functions section for details). Auxiliary Differential Input (TESTP_PACE_OUT1, TESTN_PACE_OUT2) When hardware pace detect is not used, the TESTP_PACE_OUT1 and TESPN_PACE_OUT2 signals can be used as a multiplexed differential input channel. These inputs can be multiplexed to any of the eight channels. The performance of the differential input signal fed through these pins is identical to the normal channel performance. Temperature Sensor (TempP, TempN) The ADS1294/6/8 contain an on-chip temperature sensor. This sensor uses two internal diodes with one diode having a current density 16x that of the other, as shown in Figure 20. The difference in current densities of the diodes yields a difference in voltage that is proportional to absolute temperature. As a result of the low thermal resistance of the package to the printed circuit board (PCB), the internal device temperature tracks the PCB temperature closely. Note that self-heating of the ADS1294/6/8 causes a higher reading than the temperature of the surrounding PCB. The scale factor of Equation 1 converts the temperature reading to °C. Before using this equation, the temperature reading code must first be scaled to mV. (1) Figure 20. Measurement of the Temperature Sensor in the Input 20 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): ADS1294 ADS1296 ADS1298 |
Similar Part No. - ADS1294_1005 |
|
Similar Description - ADS1294_1005 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
