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PDF SP8603 Data sheet ( Hoja de datos )
| Número de pieza | SP8603 | |
| Descripción | (SP8603 / SP8605 / SP8610) 12-Bit Sampling A/D Converters | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP8603 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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® SP8603, SP8605, SP8610
12-Bit Sampling A/D Converters
s 3µs, 5µs or 10µs Sample/Conversion
Time
s Unipolar 0V to +10V and 0V to +5V
Input
s No Missing Codes Over Temperature
s AC Performance Over Temperature
72dB Signal–to–Noise Ratio at Nyquist
85dB Spurious–free Dynamic Range at
49kHz
–81dB Total Harmonic Distortion at 49kHz
s Internal Sample/Hold, Reference,
Clock, and 3-State Outputs
s Power Dissipation: 90mW
s 28–Pin Narrow PDIP and SOIC
Packages
DESCRIPTION…
The SP86XX Seriesare complete, unipolar, 12-bit sampling A/D converters using state-of-the-art
CMOS structures. They contain a complete 12-bit successive approximation A/D converter with
internal sample/hold, reference, clock, digital interface for microprocessor control, and three-state
output drivers. Power dissipation is only 90mW. AC and DC performance are completely
specified. Sampling/conversion rates of 3µs, 5µs and 10µs are offered.
t4u.com0V to10VIN
e0V to 5VIN
tasheVREF Output
(1.2043V)
CS R/C HBE
Control
Logic
Clock
Internal
Ref
CDAC.....
.....
.....
.....
SAR
Comparator
www.daSP8603/8605/8610DS/02
SP8603/8605/8610 12-Bit Sampling A/D Converters
1
Output
Latches
And
Three
State
Drivers
BUSY
Three
State
Parallel
Output
Data
Bus
© Copyright 2000 Sipex Corporation
1 page  
FEATURES...
The SP86XX Series are specified at sampling
rates of 333kHz (SP8603), 200kHz (SP8605) or
100kHz (SP8610). Conversion times are factory
set for 2.70µs, 4.7µs and 9.7µs maximum, re-
spectively, over temperature, and the high-
speed sampling input stage insures a total acqui-
sition and conversion time of 3µs, 5µs and 10µs
maximum, respectively, over temperature. Pre-
cision, laser-trimmed scaling resistors provide
industry-standard input ranges of 0V to +5V or
0V to +10V.
The 28-pin SP86XX Series are available in
narrow plastic DIP, and SOIC packages and it
operates from a single +5V supply. The SP86XX
Series are available in grades specified over the
0°C to +70°C commercial temperature ranges.
after the conversion is completed and the data has
been transferred to the output drivers. Thus, the
rising edge can be used to read the data from the
conversion. Also, during conversion, the BUSY
signal puts the output data lines in Hi-Z states and
inhibits the input lines. This means that pulses on
R/C are ignored, so that new conversions cannot be
initiated during a conversion.
The SP86XX Series will begin acquiring a new
sample just prior to the BUSY output rising, and
will track the input signal until the next conversion
is started.
In the Read Mode, R/C is kept normally LOW, and
a HIGH pulse is used to read data and initiate a
conversion. In this mode, the rising edge of R/C
will enable the output data pins, and the data from
the previous conversion becomes valid. The fall-
ing edge then puts the SP86XX Series in a hold
mode, and initiates a new conversion.
OPERATION
Basic Operation
Figure 1 shows the simple hookup circuit required
to operate the SP86XX Series in a 0V to +10V
range in the Convert Mode. A convert command
arriving on R/C puts the SP86XX Series in the
HOLD mode, and a conversion is started. This
pulse must be LOW for a minimum of 40ns.
Because this pulse establishes the sampling instant
of the A/D, it must have very low jitter. BUSY will
be held LOW during the conversion, and rises only
Input
D11
(MSB)
1 N.C.
2 IN 1
3 IN 2
N.C. 28
+5V
+5V 27
+5V 26
6.8µF +
0.1µF
4 VREF
N.C. 25
5 AGND BUSY 24
6 D11 (MSB) CS 23
Busy
7 D10
8 D9
R/C 22
HBE 21
Convert
Command
9 D8 D0 (LSB) 20
10 D7
D1 19
11 D6
D2 18
12 D5
D3 17
13 D4
14 N.C.
DGND 16
N.C. 15
Data
Out
D0
(LSB)
Figure 1. Basic 0V to 10V Operation
Forusewithan8-bitbus,thedatacanbereadoutintwo
bytes under the control of HBE. With a LOW input
on HBE, at the end of a conversion, the 8 LSBs of data
areloadedintotheoutputdriversonD throughD and
74
D through D . Taking HBE HIGH then loads the 4
30
MSBs on D3 through D0, with D7 through D4 being
forced LOW.
Analog Input Ranges
The SP86XX Series offers two standard unipolar
input ranges: 0V to +10V and 0V to +5V. If a 10V
unipolar range is required, the analog input signal
should be connected to pin 2. A signal requiring a
5V unipolar range should be connected to pin 3. In
either case, the other pin of the two must be
grounded or connected to the adjustment circuits
described in the section on calibration.
Controlling The SP86XX Series
The SP86XX Series can be easily interfaced to most
microprocessor-based and other digital systems. The
microprocessor may take full control of each conver-
sion, or the SP86XX Series may operate in a stand-
alone mode, controlled only by the R/C input. Full
control consists of initiating the conversion and read-
ingtheoutputdataatusercommand,transmittingdata
either all 12-bits in one parallel word, or in two 8-bit
bytes.Thethreecontrolinputs(CS,R/CandHBE)are
all TTL/CMOS compatible. The functions of the
SP8603/8605/8610DS/02
SP8603/8605/8610 12-Bit Sampling A/D Converters
5
© Copyright 2000 Sipex Corporation
5 Page 
CS or
HBE
R/C
tS tH
tW
BUSY
Data
BUS
Data Valid
Figure 7. Conversion Start Timing
tDBC
Hi-Z State
tHDR and tHL
SP8603/8605/8610DS/02
SP8603/8605/8610 12-Bit Sampling A/D Converters
11
© Copyright 2000 Sipex Corporation
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SP8603.PDF ] | |
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