AVAILABLE
DS2450
1-Wire Quad A/D Converter
FEATURES
Four high-impedance inputs to measure
analog voltages over the 1-Wire® bus
User programmable input range (2.56V,
5.12V), resolution (1 to 16 bits) and alarm
thresholds
5V, single supply operation
Very low power: 2.5 mW active, 25 μW idle
Built-in multidrop controller allows multiple
DS2450’s to be identified and operated on a
common 1-Wire bus
Responds to Conditional Search if the analog
voltage crosses the alarm thresholds
Channels not used as analog input can serve
as open drain digital outputs for closed-loop
control
Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3k bits per second
Overdrive mode boosts communication speed
to 142k bits per second
Osanfe-cghuiaprding1d6a-tbaitFtraunnsfcCerRtsiCo-ngeanlerDatioargrafmors
Unique, factory-lasered and tested 64-bit
registration number (8-bit family code + 48-
bit serial number 8-bit CRC tester) assures
absolute traceability because no two parts are
alike
8-bit family code specifies device
communication requirements to bus master
Operating temperature range from -40°C to
+85°C
Compact, low cost 8-pin SOIC surface mount
package
PIN ASSIGNMENT
VCC
1
8
AIN-D
NC
2
7
AIN-C
DATA
3
6
AIN-B
GND
4
5
AIN-A
8-PIN SOIC (208 MIL)
PIN DESCRIPTION
VCC
4.5 to 5.5V
NC
Do Not Connect
DATA
1-Wire Bus
GND
Ground
AIN-A
Analog Input A
AIN-B
Analog Input B
AIN-C
Analog Input C
AIN-D
Analog Input D
ORDERING INFORMATION
DS2450S
8-pin SOIC
DS2450S/T&R
8-pin SOIC Tape-and-Reel
DS2450S+
8-pin SOIC
DS2450S+T&R 8-pin SOIC Tape-and-Reel
+ Indicates lead-free compliance.
1-Wire is a registered trademark of Dallas Semiconductor.
DESCRIPTION
The DS2450 1-Wire Quad A/D Converter is based on a successive-approximation analog to digital
coFPnuivnneCcrtotioennrfiagwluDriaitathigoranasmfaospucporenattroinauoteendnedataoenfndadalotoagf sdhmaetaeutsl.thiepelte. xer. Each input channel has its own register set to store the
inpUuCtSPvoislatatrgaedermaanrgk eof, MreaxsiomluInttieognra,teadnPdroadluacrtsm, Intch.reshold values as well as flags to enable participation of the
device in the conditional search if the input voltage leaves the specified range. Two alarm flags for each
channel indicate if the voltage measured was too high or too low without requiring the bus master to do
For pricing, delivery, and ordering information, opfl2e4ase contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
112706