Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

TS12012 Arkusz danych(PDF) 11 Page - Silicon Laboratories

Numer części TS12012
Szczegółowy opis  Nanopower Op Amp, Comparator, and Reference
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  SILABS [Silicon Laboratories]
Strona internetowa  http://www.silabs.com
Logo SILABS - Silicon Laboratories

TS12012 Arkusz danych(HTML) 11 Page - Silicon Laboratories

Back Button TS12012 Datasheet HTML 7Page - Silicon Laboratories TS12012 Datasheet HTML 8Page - Silicon Laboratories TS12012 Datasheet HTML 9Page - Silicon Laboratories TS12012 Datasheet HTML 10Page - Silicon Laboratories TS12012 Datasheet HTML 11Page - Silicon Laboratories TS12012 Datasheet HTML 12Page - Silicon Laboratories TS12012 Datasheet HTML 13Page - Silicon Laboratories TS12012 Datasheet HTML 14Page - Silicon Laboratories TS12012 Datasheet HTML 15Page - Silicon Laboratories Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 18 page
background image
TS12011/TS12012
TS12011/12 Rev. 1.0
Page 11
Adding Hysteresis to the TS12011 Push-pull
Output Option
Additional hysteresis can be generated with three
external resistors using positive feedback as shown
in Figure 2. Unfortunately, this method also reduces
the hysteresis response time. The procedure to
calculate the resistor values for the TS12011 is as
follows:
1)
Setting R2. As the leakage current at the IN
pin is less than 20nA, the current through R2
should be at least 150nA to minimize offset
voltage errors caused by the input leakage
current. The current through R2 at the trip
point is (VREFOUT - VCOMPOUT)/R2.
In solving for R2, there are two formulas –
one each for the two possible output states:
R2 = VREFOUT/IR2
or
R2 = (VDD - VREFOUT)/IR2
From the results of the two formulae, the
smaller of the two resulting resistor values is
chosen.
For
example,
when
using
the
TS12011 (VREFOUT = 0.58V) at a VDD = 2.5V
and if IR2 = 150nA is chosen, then the
formulae above produce two resistor values:
3.87M
Ω and 12.8MΩ - a 4.02MΩ standard
value for R2 is selected.
2)
Next, the desired hysteresis band (VHYSB) is
set. In this example, VHYSB is set to 100mV.
3)
Resistor R1 is calculated according to the
following equation:
R1 = R2 x (VHYSB/VDD)
and substituting the values selected in 1) and
2) above yields:
R1 = 4.02M
Ω x (100mV/2.5V) = 160.8kΩ.
The 160k
Ω standard value for R1 is chosen.
4)
The trip point for COMPIN+ rising (VTHR) is
chosen such that VTHR > VREFOUT x (R1 +
R2)/R2 (VTHF is the trip point for VCOMPIN+
falling). This is the threshold voltage at which
the comparator switches its output from low
to high as VCOMPIN+ rises above the trip point.
In this example, VTHR is set to 2.
5)
With the VTHR from Step 4 above, resistor R3
is then computed as follows:
R3 = 1/[VTHR/(VREFOUT x R1) - (1/R1) - (1/R2)]
R3 = 1/[2V/(0.58V x 160k
Ω) - (1/160kΩ) -
(1/4.02M
Ω)] = 66.43kΩ
In this example, a 69.8k
Ω, 1% standard
value resistor is selected for R3.
6)
The last step is to verify the trip voltages and
hysteresis
band
using
the
standard
resistance values:
For VCOMPIN+ rising:
VTHR = VREFOUT x R1 [(1/R1) + (1/R2) + (1/R3)]
= 1.93V
For VCOMPIN+ falling:
VTHF = VTHR - (R1 x VDD/R2) = 1.83V
and Hysteresis Band = VTHR – VTHF = 100mV
Figure 2. Using Three Resistors Introduces
Additional Hysteresis in the TS12011
Figure 1. TS12011/TS12012 Threshold
Hysteresis Band


Podobny numer części - TS12012

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Touchstone Semiconducto...
TS12012 TOUCHSTONE-TS12012 Datasheet
809Kb / 11P
   A 0.8V/1.5uA Nanopower Op Amp, Comparator, and Reference
TS12012ITD1022T TOUCHSTONE-TS12012ITD1022T Datasheet
809Kb / 11P
   A 0.8V/1.5uA Nanopower Op Amp, Comparator, and Reference
TS12012ITD1022TP TOUCHSTONE-TS12012ITD1022TP Datasheet
809Kb / 11P
   A 0.8V/1.5uA Nanopower Op Amp, Comparator, and Reference
More results

Podobny opis - TS12012

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Touchstone Semiconducto...
TS12011 TOUCHSTONE-TS12011 Datasheet
809Kb / 11P
   A 0.8V/1.5uA Nanopower Op Amp, Comparator, and Reference
logo
Linear Technology
LTC1541 LINER-LTC1541 Datasheet
180Kb / 12P
   Micropower Op Amp, Comparator and Reference
LTC1541CDD LINER-LTC1541CDD Datasheet
265Kb / 12P
   Micropower Op Amp, Comparator and Reference
LTC1541 LINER-LTC1541_15 Datasheet
265Kb / 12P
   Micropower Op Amp, Comparator and Reference
LTC1542 LINER-LTC1542_15 Datasheet
265Kb / 12P
   Micropower Op Amp, Comparator and Reference
LTC1540 LINER-LTC1540 Datasheet
247Kb / 12P
   Nanopower Comparator with Reference
LTC1540CDD LINER-LTC1540CDD Datasheet
147Kb / 12P
   Nanopower Comparator with Reference
LTC1540 LINER-LTC1540_15 Datasheet
160Kb / 12P
   Nanopower Comparator with Reference
logo
Shanghai Consonance Ele...
CN951 CONSONANCE-CN951 Datasheet
271Kb / 8P
   Low-Power, Single-Supply Op Amp Comparator Reference
logo
Touchstone Semiconducto...
TS9001 TOUCHSTONE-TS9001 Datasheet
237Kb / 8P
   1.6V Nanopower Comparator with Internal Reference
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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