|
|
PDF ADS8343 Data sheet ( Hoja de datos )
| Número de pieza | ADS8343 | |
| Descripción | 16-Bit/ 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADS8343 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
ADS8343
ADS8343
SBAS183A – JANUARY 2001 – REVISED OCTOBER 2002
16-Bit, 4-Channel Serial Output Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q BIPOLAR INPUT RANGE
q PIN-FOR-PIN COMPATIBLE WITH THE
ADS7841 AND ADS8341
q SINGLE SUPPLY: 2.7V to 5V
q 4-CHANNEL SINGLE-ENDED OR
2-CHANNEL DIFFERENTIAL INPUT
q UP TO 100kHz CONVERSION RATE
q 86dB SINAD
q SERIAL INTERFACE
q SSOP-16 PACKAGE
APPLICATIONS
q DATA ACQUISITION
q TEST AND MEASUREMENT
q INDUSTRIAL PROCESS CONTROL
q PERSONAL DIGITAL ASSISTANTS
q BATTERY-POWERED SYSTEMS
DESCRIPTION
The ADS8343 is a 4-channel, 16-bit sampling Analog-to-
Digital (A/D) converter with a synchronous serial interface.
Typical power dissipation is 8mW at a 100kHz throughput
rate and a +5V supply. The reference voltage (VREF) can be
varied between 500mV and VCC/2, providing a corresponding
input voltage range of ±VREF. The device includes a shut-
down mode which reduces power dissipation to under 15µW.
The ADS8343 is ensured down to 2.7V operation.
Low power, high speed, and an onboard multiplexer make
the ADS8343 ideal for battery-operated systems such as
personal digital assistants, portable multi-channel data log-
gers, and measurement equipment. The serial interface also
provides low-cost isolation for remote data acquisition. The
ADS8343 is available in an SSOP-16 package and is en-
sured over the –40°C to +85°C temperature range.
CH0
CH1
CH2
CH3
COM
VREF
Four
Channel
Multiplexer
SAR
CDAC
Comparator
Serial
Interface
and
Control
DCLK
CS
SHDN
DIN
DOUT
BUSY
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2001, Texas Instruments Incorporated
1 page  
TYPICAL CHARACTERISTICS: +5V
At TA = +25°C, +VCC = +5V, VREF = +2.5V, fSAMPLE = 100kHz, and fCLK = 24 • fSAMPLE = 2.4MHz, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
0
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 1.001kHz, –0.2dB)
10 20 30
Frequency (kHz)
40
50
0
–20
–40
–60
–80
–100
–120
–140
0
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 9.985kHz, –0.2dB)
10 20 30
Frequency (kHz)
40
50
100
90
80
70
60
1
SIGNAL-TO-NOISE RATIO AND
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY
SNR
SINAD
10
Frequency (kHz)
100
SPURIOUS-FREE DYNAMIC RANGE AND
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
110 –110
SFDR
100 –100
90 –90
THD(1)
80 –80
70 –70
NOTE: (1) First nine harmonics of the input frequency.
60
1 10
Frequency (kHz)
–60
100
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
11.0
1
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
10
Frequency (kHz)
100
CHANGE IN SIGNAL-TO-(NOISE + DISTORTION)
vs TEMPERATURE
0.1
fIN = 4.956kHz, –0.2dB
0
–0.1
–0.2
–0.3
–50
–25
0 25 50
Temperature (°C)
75 100
ADS8343
SBAS183A
www.ti.com
5
5 Page 
When the input is single-ended, the COM input is held at a
fixed voltage. The CHX input swings around the same
voltage and the peak-to-peak amplitude is 2 • VREF. The
value of VREF determines the range over which the common
voltage may vary, as shown in Figure 3.
5
4.9
4
VCC = 5V
3 Single-Ended Input
2
2.8
2.1
1
0.1
0
–1
0.5
1.0 1.5
2.0
VREF (V)
2.5
FIGURE 3. Single-Ended Input—Common Voltage Range vs VREF.
When the input is differential, the amplitude of the input is the
difference between the CHX and COM input. A voltage or
signal is common to both of these inputs. The peak-to-peak
amplitude of each input is VREF about this common voltage.
However, since the inputs are 180° out-of-phase, the peak-
to-peak amplitude of the difference voltage is 2 • VREF. The
value of VREF also determines the range of the voltage that
may be common to both inputs, as shown in Figure 4.
5.2
5
4
VCC = 5V
4.2
In each case, care should be taken to ensure that the output
impedance of the sources driving the CHX and COM inputs
are matched. If this is not observed, the two inputs could
have different settling times. This may result in offset error,
gain error, and linearity error which change with both tem-
perature and input voltage. If the impedance cannot be
matched, the errors can be lessened by giving the ADS8343
additional acquisition time.
The input current on the analog inputs depends on a number
of factors: sample rate, input voltage, and source impedance.
Essentially, the current into the ADS8343 charges the inter-
nal capacitor array during the sample period. After this
capacitance has been fully charged, there is no further input
current.
Care must be taken regarding the absolute analog input
voltage. Outside of these ranges, the converter’s linearity
may not meet specifications. Please refer to the electrical
characteristics table for min/max ratings.
REFERENCE INPUT
The external reference sets the analog input range. The
ADS8343 will operate with a reference in the range of 500mV
to +VCC/2. Keep in mind that the analog input is the differ-
ence between the CHX input and the COM input, as shown
in Figure 5. For example, in the single-ended mode, a 1.25V
reference, and with the COM pin at VREF, the selected input
channel (CH0-CH3) will properly digitize a signal in the range
of 0V to 1.25V. If the COM pin is connected to 0.5V, the input
range on the selected channel is 0.5V to 1.75V.
CH0
CH1
CH2
CH3
A2-A0
(Shown 001B)
+IN
Converter
–IN
3 Differential Input
2
1
0.2
0
0.0 1.0 1.5 2.0
VREF (V)
0.8
2.5
FIGURE 4. Differential Input—Common Voltage Range vs VREF.
COM
SGL/DIF
(Shown HIGH)
FIGURE 5. Simplified Diagram of the Analog Input.
There are several critical items concerning the reference
input and its wide voltage range. As the reference voltage is
reduced, the analog voltage weight of each digital output
code is also reduced. This is often referred to as the LSB
(Least Significant Bit) size and is equal to the reference
voltage divided by 65,536. Any offset or gain error inherent
in the A/D converter will appear to increase, in terms of LSB
ADS8343
SBAS183A
www.ti.com
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ADS8343.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADS8341 | ADS8341: 16-Bit 4-Channel Serial Output Sampling Analog-To-Digital Converter (Rev. D) |  Texas Instruments |
| ADS8342 | ADS8342: 16-Bit 250kSPS 4-Channel Parallel Output Analog-to-Digital Converter | Texas Instruments |
| ADS8343 | 16-Bit/ 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER | Burr-Brown Corporation |
| ADS8343 | ADS8343: 16-Bit 4-Channel Serial Output Sampling Analog-to-Digital Converter (Rev. C) | Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |