Electronic Components Datasheet Search |
|
ADS1014IRUGR Datasheet(PDF) 9 Page - Texas Instruments |
|
|
ADS1014IRUGR Datasheet(HTML) 9 Page - Texas Instruments |
9 / 35 page VDD GND AIN0 VDD GND AIN1 VDD GND AIN2 VDD GND AIN3 AIN P AIN N GND ADS1015 t SAMPLE ON OFF S 1 S 2 OFF ON ADS1013 ADS1014 ADS1015 www.ti.com SBAS473C – MAY 2009 – REVISED OCTOBER 2009 MULTIPLEXER If it is possible that the voltages on the input pins may violate these conditions, external Schottky clamp The ADS1015 contains an input multiplexer, as diodes and/or series resistors may be required to limit shown in Figure 10. Either four single-ended or two the input current to safe values (see the Absolute differential signals can be measured. Additionally, Maximum Ratings table). AIN0 and AIN1 may be measured differentially to AIN3. The multiplexer is configured by three bits in Also, overdriving one unused input on the ADS1015 the Config register. When single-ended signals are may affect conversions taking place on other input measured, the negative input of the ADC is internally pins. If overdrive on unused inputs is possible, again connected to GND by a switch within the multiplexer. it is recommended to clamp the signal with external Schottky diodes. ANALOG INPUTS The ADS1013/4/5 use a switched-capacitor input stage where capacitors are continuously charged and then discharged to measure the voltage between AINP and AINN. The capacitors used are small, and to external circuitry the average loading appears resistive. This structure is shown in Figure 12. The resistance is set by the capacitor values and the rate at which they are switched. Figure 11 shows the on/off setting of the switches illustrated in Figure 12. During the sampling phase, S1 switches are closed. This event charges CA1 to AINP, CA2 to AINN, and CB to (AINP – AINN). During the discharge phase, S1 is first opened and then S2 is closed. Both CA1 and CA2 then discharge to approximately 0.7V and CB discharges to 0V. This charging draws a very small transient current from the source driving the Figure 10. ADS1015 MUX ADS1013/4/5 analog inputs. The average value of this current can be used to calculate the effective The ADS1013 and ADS1014 do not have a impedance (Reff) where Reff = VIN/IAVERAGE. multiplexer. Either one differential or one single-ended signal may be measured with these devices. For single-ended measurements, connect the AIN1 pin to GND. Note that in subsequent sections of this data sheet, AINP refers to AIN0 and AINN refers to AIN1 for the ADS1013 and ADS1014. When measuring single-ended inputs it is important to note that the negative range of the output codes are not used. These codes are for measuring negative Figure 11. S1 and S2 Switch Timing for Figure 12 differential signals such as (AINP – AINN) < 0. ESD diodes to VDD and GND protect the inputs on all three devices (ADS1013, ADS1014, and ADS1015). To prevent the ESD diodes from turning on, the absolute voltage on any input must stay within the following range: GND – 0.3V < AINx < VDD + 0.3V Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): ADS1013 ADS1014 ADS1015 |
Similar Part No. - ADS1014IRUGR |
|
Similar Description - ADS1014IRUGR |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |