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PDF SDM873A Data sheet ( Hoja de datos )

Número de pieza SDM873A
Descripción 16 Single Ended/8 Differential Input 12-BIT DATA ACQUISITION SYSTEMS
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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® SDM862
FPFOPO 46%
43%
SDM863
SDM872
SDM873
16 Single Ended/8 Differential Input
12-BIT DATA ACQUISITION SYSTEMS
FEATURES
q COMPLETE 12-BIT DATA ACQUISITION
SYSTEM IN A MINIATURE PACKAGE
q INPUT RANGES SELECTABLE FOR
UNIPOLAR OR BIPOLAR OPERATION
q THROUGHPUT RATES: 862/3 872/3
8-BIT ACCURACY: 45kHz 67kHz
12-BIT ACCURACY: 33kHz 50kHz
q SELECTABLE GAINS OF 1, 10, AND 100
q FULL MICROPROCESSOR COMPATIBLE
INTERFACE
q GUARANTEED NO MISSING CODES OVER
TEMPERATURE
q SURFACE-MOUNT OR PIN GRID ARRAY
PACKAGE OPTIONS
q HIGH RELIABILITY SCREENED VERSIONS
AVAILABLE
q FULL SPECIFICATION OVER THREE
TEMPERATURE RANGES:
0 to +70°C, –25 to +85°C, –55 to +125°C
q EVERY UNIT SUPPLIED WITH
ELECTRICAL TEST DATA
APPLICATIONS
q INDUSTRIAL PROCESS MONITORING
q AIRBORNE SYSTEMS MONITORING
q ENGINE MONITORING
q POWER PLANT MONITORING
q SECURITY SYSTEMS MONITORING
q AUTOMATIC TEST EQUIPMENT
DESCRIPTION
16 Single-Ended Inputs: SDM862
8 Differential Inputs: SDM863
33kHz Throughput Rate: SDM862
50kHz Throughput Rate: SDM872
SDM872
SDM873
SDM863
SDM873
The SDM components are complete, pin-compatible,
data acquisition systems housed in a hermetically sealed
1"-square leadless chip carrier or a 1.1"-square pin grid
array. The small package outlines and low power con-
sumption provide an ideal data acquisition solution
when space is at a premium.
The devices comprise of an input multiplexer, instru-
mentation amplifier with selectable gains, sample/hold
amplifier and A/D converter with microprocessor inter-
face and three-state buffers.
The SDM family will accept unipolar or bipolar voltage
inputs in the range 0 to +10V, ±5V and ±10V. For low-
level signals, jumper-selectable gains of 10 or 100 can
be applied. The number of input channels can be ex-
panded by the addition of multiplexers. System integra-
tion is simplified by the microprocessor interface and
the facility of the sample/hold amplifier being con-
trolled directly by the A/D converter.
ANALOG
8 CH
16 CH
8 CH
MUX
INA S/H
ADC
DIGITAL
12 Bits
862/872 863/873
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1988 Burr-Brown Corporation
PDS-686F
Printed in U.S.A. August, 1993

1 page




SDM873A pdf
ORDERING INFORMATION(1)
Product
SDM862J
SDM862K
SDM862A
SDM862B
SDM862R
SDM862S
SDM872J
SDM872K
SDM872A
SDM872B
SDM872R
SDM872S
LCC, PGA Accuracy
Input Package (% FSR)
16SE
16SE
16SE
16SE
16SE
16SE
L,H
L,H
L,H
L,H
L,H
L,H
±0.024
±0.012
±0.024
±0.012
±0.024
±0.012
16SE
16SE
16SE
16SE
16SE
16SE
L,H
L,H
L,H
L,H
L,H
L,H
±0.024
±0.012
±0.024
±0.012
±0.024
±0.012
Throughput
33kHz
33kHz
33kHz
33kHz
33kHz
33kHz
50kHz
50kHz
50kHz
50kHz
50kHz
50kHz
Temperature
Range (°C)
0 to +70
0 to +70
–25 to +85
–25 to +85
–55 to +125
–55 to +125
0 to +70
0 to +70
–25 to +85
–25 to +85
–55 to +125
–55 to +125
Product
SDM863J
SDM863K
SDM863A
SDM863B
SDM863R
SDM863S
SDM873J
SDM873K
SDM873A
SDM873B
SDM873R
SDM873S
Input
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
8DIF
LCC, PGA Accuracy
Package (% FSR)
L, H ±0.024
L, H ±0.012
L, H ±0.024
L, H ±0.012
L, H ±0.024
L, H ±0.012
L,H ±0.024
L,H ±0.012
L,H ±0.024
L,H ±0.012
L,H ±0.024
L,H ±0.012
Temperature
Throughput Range (°C)
33kHz
33kHz
33kHz
33kHz
33kHz
33kHz
0 to +70
0 to +70
–25 to +85
–25 to +85
–55 to +125
–55 to +125
50kHz
50kHz
50kHz
50kHz
50kHz
50kHz
0 to +70
0 to +70
–25 to +85
–25 to +85
–55 to +125
–55 to +125
NOTE: (1) 16 single-ended inputs, LCC package, with accuracy of 0.24% FSR. Temp Range of 0°C to +70°C and throughput of 33kHz = SDM862JL.
PACKAGE INFORMATION
PRODUCT
DESCRIPTION
PACKAGE DRAWING
NUMBER(1)
PC862/863-1 LCC (Socketed) Evaluation PCB(2)
PC862/863-2
PGA Evaluation PCB
907
906
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book. (2) Socket is MC0068-1.
®
5 SDM862/863/872/873

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SDM873A arduino
below the first code transition (000H to 001H at –9.99756V)
and the plus full-scale value of +10V is 7.32mV above the
last code transition (FFEH to FFFH at +9.99268) (see Figure
13).
NO MISSING CODES
(DIFFERENTIAL LINEARITY ERROR)
A specification which guarantees no missing codes requires
that every code combination appear in a monotonically-
increasing sequence as the analog input is increased through-
out the range. Thus, every input code width (quantum) must
have a finite width. If an input quantum has a value of zero
(a differential linearity error of –1LSB), a missing code will
occur.
The SDM is guaranteed to have no missing codes to 12-bit
resolution over it’s respective specification temperature
ranges.
UNIPOLAR OFFSET ERROR
An SDM connected for unipolar operation has an analog
input range of 0V to plus full scale. The first output code
transition should occur at an analog input value 1/2LSB
above 0V. Unipolar offset error is defined as the deviation of
the actual transition value from the ideal value. The unipolar
offset temperature coefficient specifies the change of this
transition value versus a change in ambient temperature.
BIPOLAR OFFSET ERROR
A/D converter specifications have historically defined bipo-
lar offset as the first transition value above the minus full-
scale value. The SDM specification, however, follows the
terminology defined for the 574 converter several years ago.
Thus, bipolar offset is located near the midscale value of 0V
(bipolar zero) at the output code transition 7FFH to 800H.
Bipolar offset error for the SDM is defined as the deviation
of the actual transition value from the ideal transition value
located 1/2LSB below 0V. The bipolar offset temperature
coefficient specifies the maximum change of the code tran-
sition value versus a change in ambient temperature.
FULL SCALE CALIBRATION ERROR
The last output code transition (FFEH to FFFH) occurs for an
analog input value 3/2LSB below the nominal full-scale
value. The full-scale calibration error is the deviation of the
actual analog value at the last transition point from the ideal
value. The full-scale calibration temperature coefficient speci-
fies the maximum change of the code transition value versus
a change in ambient temperature.
OPERATING INSTRUCTIONS
OPERATING MODES
The SDM can operate in one of two modes, namely serial
and overlap, as shown in Figure 10. In serial mode, control
of the device is such that a multiplexer channel X is first
selected, time is then allowed for the instrumentation ampli-
fier to settle, the sample/hold amplifier is set to HOLD mode
and finally a conversion is carried out. This procedure is
then repeated for channel Y. Faster throughput can be
obtained using overlap mode. While a conversion is being
SERIAL MODE
Signal Acquisition
Conversion
MUX
Selection
(X)
Instrumentation
Amp
Settling
Sample/
Hold
Acquisition
A/D
Conversion
Time
OVERLAP MODE
MUX
Selection
(X)
Instrumentation
Amp
Settling
Sample/
Hold
Acquisition
MUX
Selection
(Y)
Instrumentation
Amp
Settling
Data
Valid
MUX
Selection
(Y)
Sample/
Hold
Acquisition
MUX
Selection
(Z)
Signal Acquisition
Signal Acquisition
Conversion
A/D
Conversion on
Channel (X)
Time
FIGURE 10. Serial and Overlap Modes of Operation.
11
Data Valid
A/D
Conversion on
Channel (Y)
SDM862/863/872/873
®

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