Electronic Components Datasheet Search |
|
7106G-R40-T Datasheet(PDF) 9 Page - Unisonic Technologies |
|
7106G-R40-T Datasheet(HTML) 9 Page - Unisonic Technologies |
9 / 18 page 7106 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 9 of 18 www.unisonic.com.tw QW-R502-018.E DETAILED DESCRIPTION(Cont.) ANALOG COMMON This pin is included primarily to set the common mode voltage for battery operation (UTC 7106) or for any system where the input signals are floating with respect to the power supply. The COMMON pin sets a voltage that is approximately 2.8V more negative than the positive supply. This is selected to give a minimum end-of-life battery voltage of about 6V. However, analog COMMON has some of the attributes of a reference voltage. When the total supply voltage is large enough to cause the zener to regulate(>7V), the COMMON voltage will have a low voltage coefficient (0.001%/V), low output impedance ( 15 ≒ Ω), and a temperature coefficient typically less than 80ppm/℃. The UTC 7106, with its negligible dissipation, suffers from none of these problems. In either case, an external reference can easily be added, as shown in Fig.2 Analog COMMON is also used as the input low return during auto-zero and de-integrate. If IN LO is different from analog COMMON, a common mode voltage exists in the system and is taken care of by the excellent CMRR of the converter. However, in some applications IN LO will be set at a fixed known voltage(power supply common for instance).In this application, analog COMMON should be tied to the same point, thus removing the common mode voltage from the converter. The same holds true for the reference voltage. If reference can be conveniently tied to analog COMMON, it should be since this removes the common mode voltage from the reference system. Within the IC, analog COMMON is tied to an N-Channel FET that can sink approximately 30mA of current to hold the voltage 2.8V below the positive supply (when a load is trying to pull the common line positive). However, there is only 10μA of source current, so COMMON may easily be tied to a more negative voltage thus overriding the internal reference. Iz 6.8V ZENER V- V+ V REF HI REF LO UTC 7106 COMMON REF LO REF HI UTC 7106 V 20k 6.8k ICL8069 V+ 1.2V REFERENCE FIGURE 2B. FIGURE 2 A. Fig.2 Using an External Reference |
Similar Part No. - 7106G-R40-T |
|
Similar Description - 7106G-R40-T |
|
|
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 |