Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

ADS947 Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers

No. de pieza ADS947
Descripción Electrónicos  14-Bit, 10MHz Sampling A/D Converters
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  ETC [List of Unclassifed Manufacturers]
Página de inicio  
Logo ETC - List of Unclassifed Manufacturers

ADS947 Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers

  ADS947 Datasheet HTML 1Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 2Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 3Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 4Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 5Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 6Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 7Page - List of Unclassifed Manufacturers ADS947 Datasheet HTML 8Page - List of Unclassifed Manufacturers  
Zoom Inzoom in Zoom Outzoom out
 4 / 8 page
background image
ADS-947
4
®®
CALIBRATION PROCEDURE
Any offset and/or gain calibration procedures should not be
implemented until devices are fully warmed up. To avoid
interaction, offset must be adjusted before gain. The ranges of
adjustment for the circuits in Figures 2 and 3 are guaranteed to
compensate for the ADS-947’s initial accuracy errors and may
not be able to compensate for additional system errors.
A/D converters are calibrated by positioning their digital outputs
exactly on the transition point between two adjacent digital
output codes. This can be accomplished by connecting LED’s
to the digital outputs and adjusting until certain LED’s “flicker”
equally between on and off. Other approaches employ digital
comparators or microcontrollers to detect when the outputs
change from one code to the next.
Offset adjusting for the ADS-947 is normally accomplished at
the point where the MSB is a 1 and all other output bits are 0’s
and the LSB just changes from a 0 to a 1. This digital output
transition ideally occurs when the applied analog input is
+½ LSB (+122µV).
Gain adjusting is accomplished when all bits are 1’s and the
LSB just changes from a 1 to a 0. This transition ideally occurs
when the analog input is at +full scale minus 1½ LSB's
(+1.99963V).
Zero/Offset Adjust Procedure
1. Apply a train of pulses to the START CONVERT input (pin
18) so the converter is continuously converting.
2. Apply +122µV to the ANALOG INPUT (pin 21).
3. Adjust the offset potentiometer until the output bits are
10 0000 0000 0000 and the LSB flickers between 0 and 1.
Gain Adjust Procedure
1. Apply +1.99963V to the ANALOG INPUT (pin 21).
2. Adjust the gain potentiometer until all output bits are 1’s and
the LSB flickers between 1 and 0.
3. To confirm proper operation of the device, vary the input
signal to obtain the output coding listed in Table 2.
BIPOLAR
INPUT VOLTAGE
OFFSET BINARY
SCALE
(±2V RANGE)
MSB
LSB
+FS –1 LSB
+1.99976
11 1111 1111 1111
+3/4 FS
+1.50000
11 1000 0000 0000
+1/2 FS
+1.00000
11 0000 0000 0000
0
0.00000
10 0000 0000 0000
–1/2 FS
–1.00000
01 0000 0000 0000
–3/4 FS
–1.50000
00 1000 0000 0000
–FS +1 LSB
–1.99976
00 0000 0000 0001
–FS
–2.00000
00 0000 0000 0000
Table 2. Output Coding for Bipolar Operation
INPUT VOLTAGE
ZERO ADJUST
GAIN ADJUST
RANGE
+½ LSB
+FS –1½ LSB
±2V
+122µV
+1.99963V
Table 1. Gain and Zero Adjust
Figure 3. Typical ADS-947 Connection Diagram
0.1µF
0.1µF
4.7µF
4.7µF
22, 13
24
20
19
ADS-947
–5.2V
20k
W
0.1µF
4.7µF
+5V
14
–5V
+5V
21
23
18
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
BIT 13
BIT 14 (LSB)
DATA VALID
ANALOG
INPUT
START
CONVERT
A single +5V supply should be used for both the +5V analog and +5V digital.
If separate supplies are used, the difference between the two cannot exceed 100mV.
Œ
Œ
+
+
+
ZERO/
OFFSET
ADJUST


Número de pieza similar - ADS947

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
List of Unclassifed Man...
ADS944 ETC-ADS944 Datasheet
172Kb / 8P
   14-Bit, 5MHz Sampling A/D Converters
More results

Descripción similar - ADS947

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Murata Power Solutions ...
ADS-947 MURATA-PS-ADS-947 Datasheet
216Kb / 8P
   14-Bit, 10MHz Sampling A/D Converters
ADS-945 MURATA-PS-ADS-945 Datasheet
170Kb / 8P
   14-Bit, 10MHz Sampling A/D Converters
logo
List of Unclassifed Man...
ADS-945 ETC1-ADS-945 Datasheet
169Kb / 8P
   14-Bit, 10MHz Sampling A/D Converters
logo
Murata Power Solutions ...
ADS-939 MURATA-PS-ADS-939 Datasheet
223Kb / 7P
   16-Bit, 10MHz Sampling A/D Converters
logo
List of Unclassifed Man...
ADS119 ETC-ADS119 Datasheet
134Kb / 8P
   12-Bit, 10MHz, Low-Power Sampling A/D Converters
logo
Murata Power Solutions ...
ADS-119 MURATA-PS-ADS-119 Datasheet
136Kb / 8P
   12-Bit, 10MHz, Low-Power Sampling A/D Converters
ADS-944 MURATA-PS-ADS-944 Datasheet
174Kb / 8P
   14-Bit, 5MHz Sampling A/D Converters
logo
List of Unclassifed Man...
ADS944 ETC-ADS944 Datasheet
172Kb / 8P
   14-Bit, 5MHz Sampling A/D Converters
logo
Murata Power Solutions ...
ADS-928 MURATA-PS-ADS-928 Datasheet
1Mb / 4P
   500kHz, 14-Bit Sampling A/D Converters
logo
C&D Technologies
ADS-941 CANDD-ADS-941 Datasheet
83Kb / 6P
   14-Bit, 1MHz Sampling A/D Converters
More results


Html Pages

1 2 3 4 5 6 7 8


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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