Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

ADS1243IPWR Arkusz danych(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
Numer części ADS1243IPWR
Szczegółowy opis  24-Bit ANALOG-TO-DIGITAL CONVERTER
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

ADS1243IPWR Arkusz danych(HTML) 11 Page - Texas Instruments

Back Button ADS1243IPWR Datasheet HTML 7Page - Texas Instruments ADS1243IPWR Datasheet HTML 8Page - Texas Instruments ADS1243IPWR Datasheet HTML 9Page - Texas Instruments ADS1243IPWR Datasheet HTML 10Page - Texas Instruments ADS1243IPWR Datasheet HTML 11Page - Texas Instruments ADS1243IPWR Datasheet HTML 12Page - Texas Instruments ADS1243IPWR Datasheet HTML 13Page - Texas Instruments ADS1243IPWR Datasheet HTML 14Page - Texas Instruments ADS1243IPWR Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 25 page
background image
ADS1242, 1243
11
SBAS235B
www.ti.com
FIGURE 3. Burnout detection while sensor is open-circuited.
FIGURE 4. Burnout detection while sensor is short-circuited.
SPEED
DR BITS
1st NOTCH
fOSC
BIT
fMOD
00
01
10
FREQ.
2.4576MHz
0
19,200Hz
15Hz
7.5Hz
3.75Hz
50/60Hz
1
9,600Hz
7.5Hz
3.75Hz 1.875Hz
25/30Hz
4.9152MHz
0
38,400Hz
30Hz
15Hz
7.5Hz
100/120Hz
1
19,200Hz
15Hz
7.5Hz
3.75Hz
50/60Hz
TABLE I. Output Configuration.
OPEN CIRCUIT
V
DD
V
DD
0V
2
µA
2
µA
CODE = 0x7FFFFF
H
ADC
SHORT
CIRCUIT
V
DD
V
DD/2
V
DD/2
2
µA
2
µA
CODE
≅ 0
ADC
Figure 4 shows a short-circuited sensor. Since the inputs are
shorted and at the same potential, the ADS1242/43 signal
outputs are approximately zero. (Note that the code for
shorted inputs is not exactly zero due to internal series
resistance, low-level noise and other error sources.)
INPUT BUFFER
The input impedance of the ADS1242/43 without the buffer
enabled is approximately 5M
Ω/PGA. For systems requiring
very high input impedance, the ADS1242/43 provides a
chopper-stabilized differential FET-input voltage buffer. When
activated, the buffer raises the ADS1242/43 input impedance
to approximately 5G
Ω.
The buffer’s input range is approximately 50mV to
VDD – 1.5V. The buffer’s linearity will degrade beyond this
range. Differential signals should be adjusted so that both
signals are within the buffer’s input range.
The buffer can be enabled using the BUFEN pin or the
BUFEN bit in the ACR register. The buffer is on when the
BUFEN pin is high and the BUFEN bit is set to one. If the
BUFEN pin is low, the buffer is disabled. If the BUFEN bit is
set to zero, the buffer is also disabled.
The buffer draws additional current when activated. The
current required by the buffer depends on the PGA setting.
When the PGA is set to 1, the buffer uses approximately
50
µA; when the PGA is set to 128, the buffer uses approxi-
mately 500
µA.
PGA
The Programmable Gain Amplifier (PGA) can be set to gains
of 1, 2, 4, 8, 16, 32, 64, or 128. Using the PGA can improve the
effective resolution of the A/D converter. For instance, with a
PGA of 1 on a 5V full-scale signal, the A/D converter can
resolve down to 1
µV. With a PGA of 128 and a full-scale signal
of 39mV, the A/D converter can resolve down to 75nV. VDD
current increases with PGA settings higher than 4.
OFFSET DAC
The input to the PGA can be shifted by half the full-scale input
range of the PGA using the Offset DAC (ODAC) register. The
ODAC register is an 8-bit value; the MSB is the sign and the
seven LSBs provide the magnitude of the offset. Using the
offset DAC does not reduce the performance of the A/D
converter. For more details on the ODAC in the ADS1242/43,
please refer to TI application report SBAA077 (available
through the TI website).
MODULATOR
The modulator is a single-loop second-order system. The
modulator runs at a clock speed (fMOD) that is derived from
the external clock (fOSC). The frequency division is deter-
mined by the SPEED bit in the SETUP register, as shown in
Table I.
CALIBRATION
The offset and gain errors can be minimized with calibration.
The ADS1242 and ADS1243 support both self and system
calibration.
Self-calibration of the ADS1242 and ADS1243 corrects inter-
nal offset and gain errors and is handled by three commands:
SELFCAL, SELFGAL, and SELFOCAL. The SELFCAL com-
mand performs both an offset and gain calibration. SELFGCAL
performs a gain calibration and SELFOCAL performs an
offset calibration, each of which takes two tDATA periods to
complete. During self-calibration, the ADC inputs are discon-
nected internally from the input pins. The PGA must be set to
1 prior to issuing a SELFCAL or SELFGCAL command. Any
PGA is allowed when issuing a SELFOCAL command. For


Podobny numer części - ADS1243IPWR

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Texas Instruments
ADS1243IPWR TI1-ADS1243IPWR Datasheet
1Mb / 32P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243IPWRG4 TI1-ADS1243IPWRG4 Datasheet
1Mb / 32P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
More results

Podobny opis - ADS1243IPWR

ProducentNumer częściArkusz danychSzczegółowy opis
logo
List of Unclassifed Man...
AL1101 ETC2-AL1101 Datasheet
173Kb / 8P
   24-Bit Analog-to-Digital Converter
logo
Texas Instruments
ADS1240 TI-ADS1240 Datasheet
416Kb / 23P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
logo
Burr-Brown (TI)
ADS1210 BURR-BROWN-ADS1210 Datasheet
557Kb / 41P
   24-Bit ANALOG-TO-DIGITAL CONVERTER
logo
Texas Instruments
ADS1210 TI1-ADS1210_15 Datasheet
1Mb / 50P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1240 TI1-ADS1240_14 Datasheet
1Mb / 31P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1243SJD TI1-ADS1243SJD Datasheet
514Kb / 40P
[Old version datasheet]   24-BIT ANALOG-TO-DIGITAL CONVERTER
ADS1243-HT TI1-ADS1243-HT Datasheet
522Kb / 40P
[Old version datasheet]   24-BIT ANALOG-TO-DIGITAL CONVERTER
ADS1242 TI1-ADS1242_14 Datasheet
1Mb / 33P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1240 TI1-ADS1240_16 Datasheet
1,019Kb / 30P
[Old version datasheet]   24-Bit ANALOG-TO-DIGITAL CONVERTER
ADS1222IPWTG4 TI1-ADS1222IPWTG4 Datasheet
621Kb / 26P
[Old version datasheet]   24-Bit Analog-to-Digital Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25


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