to-digital converter (A/D) that features a high imped-
ance fully differential analog input. The reference
voltage can be varied from 100mV to 2.5V, with a
corresponding input-referred resolution between 49µV
and 1.22mV.
The differential input, low power, automatic power
down, and small size make the ADS7817 ideal for
direct connection to transducers in battery operated
systems, remote data acquisition, or multi-channel
applications. The ADS7817 is available in a plastic
mini-DIP-8, an SOIC-8, or an MSOP-8 package.
APPLICATIONS
q
TRANSDUCER INTERFACE
q
BATTERY OPERATED SYSTEMS
q
REMOTE DATA ACQUISITION
q
ISOLATED DATA ACQUISITION
q
AC MOTOR CONTROL
SAR
Control
V
REF
D
OUT
+In
CDAC
–In
S/H Amp
Comparator
Serial
Interface
DCLOCK
CS/SHDN
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
(3) See the Power Dissipation section for more information regarding lower sample rates.
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.
Analog Input ........................................................... –0.3V to (+V
CC
+ 0.3V)
Logic Input ............................................................. –0.3V to (+V
CC
+ 0.3V)
Case Temperature ......................................................................... +100°C
Junction Temperature .................................................................... +150°C
Storage Temperature ..................................................................... +125°C
External Reference Voltage .............................................................. +5.5V
NOTE: (1) Stresses above these ratings may permanently damage the device.
ELECTROSTATIC
DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from per-
formance degradation to complete device failure. Burr-
Brown Corporation recommends that all integrated circuits
be handled and stored using appropriate ESD protection
methods.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet
published specifications.
PIN CONFIGURATION
V
REF
+In
–In
GND
1
2
ADS7817
3
4
PDIP-8,
SOIC-8,
MSOP-8
6
5
D
OUT
CS/SHDN
8
7
+V
CC
DCLOCK
PIN ASSIGNMENTS
PIN
1
2
3
4
5
6
7
8
NAME
V
REF
+In
–In
GND
CS/SHDN
D
OUT
DCLOCK
+V
CC
DESCRIPTION
Reference Input.
Non Inverting Input.
Inverting Input.
Ground.
Chip Select when LOW, Shutdown Mode when HIGH.
The serial output data word is comprised of 12 bits of data. In operation the data is valid on the falling edge of DCLOCK. The
second clock pulse after the falling edge of CS enables the serial output. After one null bit the data is valid for the next 12 edges.
Data Clock synchronizes the serial data transfer and determines conversion speed.
Power Supply.
PACKAGE/ORDERING INFORMATION
MAXIMUM
INTEGRAL
LINEARITY
ERROR
(LSB)
±2
±2
MAXIMUM
DIFFERENTIAL
LINEARITY
ERROR
(LSB)
±2
±2
PRODUCT
ADS7817P
ADS7817U
ADS7817U
ADS7817E
ADS7817E
ADS7817E
ADS7817PB
ADS7817UB
ADS7817UB
ADS7817EB
ADS7817EB
ADS7817EB
ADS7817PC
ADS7817UC
ADS7817UC
ADS7817EC
ADS7817EC
ADS7817EC
PACKAGE
MSOP-8
MSOP-8
PACKAGE
DRAWING
NUMBER
(1)
006
182
SPECIFICATION
TEMPERATURE
RANGE
–40°C to +85°C
–40°C to +85°C
PACKAGE
MARKING
(2)
ADS7817P
ADS7817U
ORDERING
NUMBER
(3)
TRANSPORT
MEDIA
Rails
"
±2
"
±2
"
MSOP-8
"
337
"
–40°C to +85°C
±2
±2
"
"
"
±1
±1
"
"
"
"
"
Plastic DIP-8
Plastic DIP-8
"
"
006
182
"
"
–40°C to +85°C
–40°C to +85°C
"
SOIC-8
"
337
"
–40°C to +85°C
±2
±1
±1
±1
"
"
"
±0.75
±0.75
"
"
"
"
"
SOIC-8
SOIC-8
"
"
006
182
"
"
–40°C to +85°C
–40°C to +85°C
"
SOIC-8
"
337
"
–40°C to +85°C
±1
±0.75
"
"
"
"
"
"
"
"
"
"
ADS7817P
ADS7817U
"
ADS7817U/2K5
A17
ADS7817E
"
ADS7817E/250
"
ADS7817E/2K5
ADS7817PB
ADS7817PB
ADS7817UB
ADS7817UB
"
ADS7817UB/2K5
A17
ADS7817EB
"
ADS7817EB/250
"
ADS7817EB/2K5
ADS7817PC
ADS7817PC
ADS7817UC
ADS7817UC
"
ADS7817UC/2K5
A17
ADS7817EC
"
ADS7817EC/250
"
ADS7817EC/2K5
"
Tape and Reel
Rails
Tape and Reel
"
Rails
"
Tape and Reel
Rails
Tape and Reel
"
Rails
"
Tape and Reel
Rails
Tape and Reel
"
NOTE: (1) For detail drawing and dimension table, please see end of data sheet or Package Drawing File on Web. (2) Performance Grade information is marked
on the reel. (3) Models with a slash(/) are available only in Tape and reel in quantities indicated (e.g. /250 indicates 250 units per reel, /2K5 indicates 2500 devices
per reel). Ordering 2500 pieces of ”ADS7817E/2K5“ will get a single 2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to the
www.burr-brown.com web site under Applications and Tape and Reel Orientation and Dimensions.
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Embedded System
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