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PDF ADS7825UB Data sheet ( Hoja de datos )
| Número de pieza | ADS7825UB | |
| Descripción | 4 Channel/ 16-Bit Sampling CMOS A/D Converter | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
ADS7825
ADS7825
ADS7825
www.burr-brown.com/databook/ADS7825.html
4 Channel, 16-Bit Sampling CMOS A/D Converter
FEATURES
q 25µs max SAMPLING AND CONVERSION
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 12-BIT ADS7824
q PARALLEL AND SERIAL DATA OUTPUT
q 28-PIN 0.3" PLASTIC DIP AND SOIC
q ±2.0 LSB max INL
q 50mW max POWER DISSIPATION
q 50µW POWER DOWN MODE
q ±10V INPUT RANGE, FOUR CHANNEL
MULTIPLEXER
q CONTINUOUS CONVERSION MODE
DESCRIPTION
The ADS7825 can acquire and convert 16 bits to
within ±2.0 LSB in 25µs max while consuming only
50mW max. Laser-trimmed scaling resistors provide
the standard industrial ±10V input range and channel-
to-channel matching of ±0.1%. The ADS7825 is a
low-power 16-bit sampling A/D with a four channel
input multiplexer, S/H, clock, reference, and a
parallel/serial microprocessor interface. It can be con-
figured in a continuous conversion mode to sequen-
tially digitize all four channels. The 28-pin ADS7825
is available in a plastic 0.3" DIP and in a SOIC, both
fully specified for operation over the industrial –40°C
to +85°C range.
AIN0
AIN1
AIN2
AIN3
40kΩ
20kΩ
40kΩ
20kΩ
40kΩ
20kΩ
40kΩ
20kΩ
Continuous Conversion
Channel
CONTC
A0 A1
R/C
Clock
8kΩ
Successive Approximation Register
and Control Logic
CS
PWRD
CDAC
8kΩ
8kΩ
8kΩ
CAP
REF
Buffer
6kΩ
Internal
+2.5V Ref
Comparator
Serial
Data
Out
or
Parallel
Data
Out
8
BUSY
DATACLK
SDATA
D7-D0
BYTE
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1996 Burr-Brown Corporation
PDS-11304B
APriDnteSd in7U8.S2.A5. October, 1997
®
1 page  
TYPICAL PERFORMANCE CURVES
At TA = +25°C, fS = 40kHz, VS1 = VS2 = +5V, using internal reference, unless otherwise noted.
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
FREQUENCY SPECTRUM
(8192 Point FFT; fIN = 1.02kHz, –0.5dB)
5 10 15
Frequency (kHz)
20
–60.0
–70.0
–80.0
–90.0
–100.0
–110.0
–120.0
–130.0
–140.0
100
CROSSTALK vs INPUT FREQUENCY
(Active Channel Amplitude = –0.1dB)
Adjacent Channels, Worst Pair
Adjacent Channels
Non-Adjacent Channels
Measurement Limit
1k 10k
Active Channel Input Frequency (Hz)
100k
ADJACENT CHANNEL CROSSTALK, WORST PAIR
(8192 Point FFT; AIN3 = 1.02kHz, –0.1dB; AIN2 = AGND)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10 15 20
Frequency (kHz)
ADJACENT CHANNEL CROSSTALK, WORST PAIR
(8192 Point FFT; AIN3 = 10.1kHz, –0.1dB; AIN2 = AGND )
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0 5 10 15 20
Frequency (kHz)
100
90
80
70
60
50
40
30
100
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY (fIN = –0.1dB)
1k 10k
Input Signal Frequency (Hz)
100k
100
90
80
70
60
50
40
30
20
10
0
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY AND INPUT AMPLITUDE
0dB
–20dB
–60dB
2 4 6 8 10 12 14 16 18 20
Input Signal Frequency (kHz)
®
5 ADS7825
5 Page 
®
11 ADS7825
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADS7825UB.PDF ] | |
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