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®
ISO806
ISO806
Isolated 12-Bit Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 1500Vrms ISOLATION CONTINUOUS
q 25µS 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 ISO806 is a low-power isolated sampling ADC
using state-of-the-art CMOS structures and high volt-
age capacitors. The ISO806 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.
www.DataSheet.net/
Isolation
Barrier
R1IN
40k
R2IN
CAP
10k40k
REF
Successive Approximation Register and Control Logic
Clock
Internal
+2.5V Ref
6k
Serial
Data
Out
SB/BTC
R/C
BUSY
Data Clock
Serial Data
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-1316B
Printed in U.S.A. August, 1997
Datasheet pdf - http://www.DataSheet4U.co.kr/

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SPECIFICATIONS
ELECTRICAL
At TA = –40°C to +85°C, fS = 40kHz, VDIG = VANA = +5V, using internal reference and fixed resistors shown in Figure 3b, unless otherwise specified.
ISO806P
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
ISOLATION PARAMETERS
Rated Voltage, Continuous
Partial Discharge, 100% Test(8)
Creepage Distance (External) DIP = “P” Package
Internal Isolation Distance
Barrier Impedance
Leakage Current(9)
RESOLUTION
ANALOG INPUT
Voltage Ranges
Impedance
Capacitance
THROUGHPUT SPEED
Conversion Time
Complete Cycle
Throughput Rate
DC ACCURACY
Integral Linearity Error
Differential Linearity Error
No Missing Codes
Transition Noise(2)
Full Scale Error(3,4)
Full Scale Error Drift
Full Scale Error Drift
Bipolar Zero Error(3)
Bipolar Zero Error Drift
Unipolar Zero Error(3)
Unipolar Zero Error Drift
Power Supply Sensitivity (VDIG = VANA = VS)
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
Useable Bandwidth(6)
SAMPLING DYNAMICS
Aperture Delay
Aperture Jitter
Overvoltage Recovery(7)
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer.)
Internal Reference Drift
External Reference Voltage Range
for Specified Linearity
External Reference Current Drain
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Coding
VOL
VOH
50Hz
1s, 5pC
240Vrms, 60Hz
240Vrms, 50Hz
Acquire and Convert
Ext. 2.5000V Ref
±10V Range
±10V Range
0V to 5V, 0V to 4V Ranges
0V to 5V, 0V to 4V Ranges
+4.75V < VS < +5.25V
fIN = 1kHz, ±10V
fIN = 1kHz, ±10V
fIN = 1kHz, ±10V
fIN = 1kHz, ±10V
No Load
Ext. 2.5000V Ref
VIL = 0V
VIH = 5V
ISINK = 1.6mA
ISOURCE = 500µA
1500
2500
16
0.10
>1013 II 15
1.7
1.4
12
±10, 0 to +5, 0 to +4
(See Table II)
35
20
25
40
±0.15
±0.15
Guaranteed
0.1
±7
±0.5
±0.5
±0.5
±0.9
±0.9
±0.5
±10
±3
±0.5
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90
–90
73
73
130
40
20
750
2.48
2.5
1
8
2.3 2.5
2.52
2.7
100
–0.3
VD –1.0
1.0
VD +0.3V
±10
±10
Binary Two’s Complement or Straight Binary
0.4
+4
Vrms
Vrms
mm
mm
II pF
µArms
µArms
Bit
V
pF
µs
µs
kHz
LSB(1)
LSB
Bits
LSB
%
ppm/°C
ppm/°C
mV
ppm/°C
mV
ppm/°C
LSB
dB(5)
dB
dB
dB
kHz
ns
ps
ns
V
µA
ppm/°C
V
µA
V
V
µA
µA
V
V
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
ISO806
2
Datas

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SPECIFICATIONS (CONT)
ELECTRICAL
At TA = –40°C to +85°C, fS = 40kHz, VDIG = VANA = +5V, using internal reference and fixed resistors shown in Figure 3b, unless otherwise specified.
ISO806P
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
POWER SUPPLIES
Specified Performance
VDIG1
VANA
VDIG2
IDIG1
IANA
IDIG2
Power Dissipation
TEMPERATURE RANGE
Specified Performance
Storage
Thermal Resistance, θJA
Plastic DIP
Must be VANA
+4.75
+4.75
+4.75
VANA = VDIG = 5V, FS = 40kHz
–40
–65
+5
+5
4.2
5.0
10.8
125
75
+5.25
+5.25
+5.25
+85
+150
V
V
V
mA
mA
mA
mW
°C
°C
°C/W
NOTES: (1) LSB means Least Significant Bit. One LSB for the ±10V input range is 4.88mV. (2) Typical rms noise at worst case transition. (3) As measured with
fixed resistors shown in Figure 7b. Adjustable to zero with external potentiometer. (4) Full scale error is the worst case of –Full Scale or +Full Scale untrimmed
deviation from ideal first and last code transitions, divided by the transition voltage (not divided by the full-scale range) and includes the effect of offset error. (5)
All specifications in dB are referred to a full-scale input. (6) Usable Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise + Distortion) degrades
to 60dB. (7) Recovers to specified performance after 2 x FS input overvoltage. (8) All devices receive a 1s test. Failure criterion is 5 pulses of 5pC. (9) Tested
at 2500Vrms, 50Hz limit 10µA.
ABSOLUTE MAXIMUM RATINGS
ELECTROSTATIC
Analog Inputs: R1IN ........................................................................... ±25V
R2IN ........................................................................... ±25V
CAP .................................... VANA +0.3V to AGND2 –0.3V
REF ......................................... Indefinite Short to AGND2,
DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from per-
Momentary Short to VANA
formance degradation to complete device failure. Burr-
Ground Voltage Differences: DGND and AGND1 ............................. ±0.3V
DGND, AGND, and GNDISO ........... 1563Vrms
Brown Corporation recommends that all integrated circuits
VANA ....................................................................................................... 7V
be handled and stored using appropriate ESD protection
www.DataSheet.net/
VDIG to VANA ...................................................................................... +0.3V
methods.
VDIG ........................................................................................................ 7V
Digital Inputs .............................................................. –0.3V to VDIG +0.3V
ESD damage can range from subtle performance degrada-
Maximum Junction Temperature ................................................... +165°C
Internal Power Dissipation ............................................................. 825mW
tion to complete device failure. Precision integrated circuits
Lead Temperature (soldering, 10s) ................................................ +300°C
may be more susceptible to damage because very small
parametric changes could cause the device not to meet
PACKAGE INFORMATION
published specifications.
PRODUCT
PACKAGE
PACKAGE DRAWING
NUMBER(1)
ISO806P
Plastic DIP
215-1
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
ORDERING INFORMATION
PRODUCT
ISO806P
MAXIMUM INTEGRAL
LINEARITY ERROR (LSB)
±0.9
TYPICAL SIGNAL-TO-
(NOISE + DISTORTION) RATIO (dB)
70
SPECIFICATION
TEMPERATURE RANGE
–40°C to +85°C
PACKAGE
Plastic DIP
®
3 ISO806
Datasheet pdf - http://www.DataSheet4U.co.kr/

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PIN #
NAME
DIGITAL
I/O DESCRIPTION
1 RC
2 BUSY
3 +5VDIG2
10 +5VDIG1
11 +5VANA
12 R1IN
13 NC
14 R2IN
15 CAP
16 REF
17 AGND
18 SB/BTC
19 DGND1
26 DGND2
27 DATACLK
28 SDATA
I
O
I
O
O
Read/Convert. With BUSY high, a falling edge on R/C initiates a new conversion.
At the start of conversion BUSY goes LOW and stays LOW until conversion is complete.
Isolated Digital Supply Volts.
Digital Supply Volts.
Analog Supply Volts.
Analog Input.
No Connection. Leave unconnected.
Analog Input.
Reference Buffer Output. 2.2µF tantalum capacitor to ground.
Reference Input/Output. 2.2µF tantalum capacitor to ground.
Analog Ground.
Selects Straight Binary or Binary Two’s Complement for Output Data Format.
Digital Ground.
Isolated Ground.
Data Clock Output.
Serial Output Synchronized to DATACLK.
TABLE I. Pin Assignments.
PIN CONFIGURATION
R/C 1
BUSY 2
+5VDIG2 3
28 SDATA
27 DATACLK
26 DGND2
ANALOG
INPUT
RANGE
±10V
0V to 5V
0V to 4V
CONNECT R1IN
VIA 200
TO
VIN
AGND
VIN
CONNECT R2IN
VIA 100
TO
CAP
VIN
VIN
IMPEDANCE
45.7k
20.0k
21.4k
TABLE II. Input Range Connections. See also Figure 3.
www.DataSheet.net/
ISO806
+5VDIG1 10
+5VANA 11
R1IN 12
NC 13
R2IN 14
19 DGND1
18 SB/BTC
17 AGND
16 REF
15 CAP
R/C BUSY DATACLK OPERATION
1 Output Initiates conversion “n”. Valid data from conversion “n-1” clocked out on SDATA.
0↑
X New conversion initiated without acquisition of a new signal. Data will be invalid. R/C must be HIGH when BUSY goes HIGH.
X0
X New convert commands ignored. Conversion “n” in progress.
TABLE III. Control Functions
®
ISO806
4
Datasheet pdf - http://www.DataSheet4U.co.kr/

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TYPICAL PERFORMANCE CURVES
At TA = +25°C, fS = 40kHz, VDIG = VANA = +5V, using internal reference and fixed resistors shown in Figure 3b, unless otherwise specified.
0
–20
–40
–60
–80
–100
–120
0
FREQUENCY SPECTRUM
(8192 Point FFT; fIN = 1kHz, 0dB)
FREQUENCY SPECTRUM
(8192 Point FFT; fIN = 15kHz, 0dB)
0
–20
–40
–60
–80
–100
5 10 15
Frequency (kHz)
–120
20 0
5 10 15
Frequency (kHz)
20
90
80
70
60
50
40
30
20
10
100
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY (fIN = 0dB)
1k 10k 100k
Input Signal Frequency (Hz)
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY AND INPUT AMPLITUDE
90
80 0dB
70
60 –20dB
50
40
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30
20 –60dB
10
0
1M 0 2 4 6 8 10 12 14 16 18 20
Input Signal Frequency (kHz)
SIGNAL-TO-(NOISE + DISTORTION) vs TEMPERATURE
74.0
(fIN = 1kHz, 0dB; fS = 10kHz to 40kHz)
73.9
30kHz
20kHz
10kHz
73.8
73.7
40kHz
73.6
–75 –50 –25
0 25 50 75 100 125 150
Temperature (°C)
110
105
100
95
90
85
80
75
70
65
60
–75
A.C. PARAMETERS vs TEMPERATURE
(fIN = 1kHz, 0dB)
SFDR
SNR and SINAD
THD
–50 –25
0 25 50 75 100 125
Temperature (°C)
–60
–65
–70
–75
–80
–85
–90
–95
–100
–105
–110
150
®
5 ISO806
Datasheet pdf - http://www.DataSheet4U.co.kr/