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PDF ISO808 Data sheet ( Hoja de datos )
| Número de pieza | ISO808 | |
| Descripción | Isolated 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISO808 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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®
ISO808
ISO808
Isolated 12-Bit Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 100kHz SAMPLING RATE
q 1500Vrms ISOLATION CONTINUOUS
q 10µS CONVERSION TIME
q 12-BIT SERIAL OUTPUT
q SINGLE +5V SUPPLY
q 28-PIN 0.6" PLASTIC DIP
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q PC-BASED DATA ACQUISITION TEST
EQUIPMENT
DESCRIPTION
The ISO808 is a low-power isolated sampling ADC
using state-of-the-art CMOS structures and high volt-
age capacitors. The ISO808 contains a complete 12-bit
capacitor based SAR, ADC with S/H, clock, refer-
ence, µP interface, serial out and galvanic isolation.
Laser-trimmed scaling resistors provide standard
industrial input ranges including ±10V, ±5V, 0-5V,
0-4V. They are available in 28-pin 0.6" wide plastic
DIP and are specified over the industrial temperature
range of –40°C to +85°C.
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Isolation
Barrier
R1IN
R2IN
R3IN
CAP
20kΩ
10kΩ
5kΩ 20kΩ
REF
Successive Approximation Register and Control Logic
Clock
Internal
+2.5V Ref
4kΩ
Serial
Data
Out
R/C
BUSY
Data Clock
Serial Data
SB/BTC
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-1317B
Printed in U.S.A. October, 1996
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
t1
R/C
BUSY
t2
MODE Acquire
t5
FIGURE 1. Basic Conversion Timing.
t3
Convert
t6
R/C
DATACLK
SDATA
BUSY
t2
t8
t9
123
t11
t10
MSB Valid Bit 10 Valid Bit 9 Valid
t3
FIGURE 2. Serial Data Timing.
t4
Acquire
t7
11 12
Bit 1 Valid
LSB Valid
SPECIFIC FUNCTION
Initiate Conversion and Output Data
R/C
0
1>0
Incorrect Conversions
0
Selecting Output Format
TABLE III. Control Truth Table.
X
X
BUSY
1
1
0>1
X
DATACLK SB/BTC
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Output
X
OPERATION
Initiates Conversion “n”. Data from conversion “n–1” clocked out
on DATA synchronized to 12 clock pulses output on DATACLK.
Output
X Initiates Conversion “n”. Data from conversion “n–1” clocked out
on DATA synchronized to 12 clock pulses output on DATACLK.
X X R/C must be HIGH or a new conversion will be initiated without
time for acquisition.
X 0 Serial Data is output in Binary Two’s Complement format.
XX
1 Serial Data is output in Straight Binary format.
DESCRIPTION
ANALOG INPUT
Full-Scale Range
±10 ±5 ±3.33V 0V to 5V 0V to 10V
Least Significant Bit (LSB) 4.88mV 2.44mV 1.63mV 1.22mV 2.44mV
+Full Scale (FS – 1LSB) 9.99512V 4.99756V 3.33171V 4.99878V 9.99756V
Midscale
0V
0V
0V
2.5V
5V
One LSB Below Midscale –4.88mV –2.44mV –1.63mV 2.49878V 4.99756V
–Full Scale
–10V
–5V –3.333333V 0V
0V
0V to 4V
0.98mV
3.99902V
2V
1.99902V
0V
DIGITAL OUTPUT
BINARY TWO’S
COMPLEMENT
(SB/BTC LOW)
STRAIGHT BINARY
(SB/BTC HIGH)
HEX
HEX
BINARY CODE CODE BINARY CODE CODE
0111 1111 1111 7FF 1111 1111 1111 FFF
0000 0000 0000 000 1000 0000 0000 800
1111 1111 1111 FFF 0111 1111 1111 7FF
1000 0000 0000 800 0000 0000 0000 000
TABLE IV. Output Codes and Ideal Input Voltages.
®
5 ISO808
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet ISO808.PDF ] | |
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