Rainbow-electronics DS4412 Bedienungsanleitung

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General Description
The DS4412 contains two I
2
C adjustable-current DACs
that are each capable of sinking or sourcing current. Each
output has 15 sink and 15 source settings that are pro-
grammed by I
2
C interface. The full-scale range and step
size of each output is determined by an external resistor
that can adjust the output current over a 4:1 range.
The output pins, OUT0 and OUT1, power-up in a high-
impedance state.
Applications
Power-Supply Adjustment
Power-Supply Margining
Adjustable Current Sink or Source
Features
Two Current DACs
Full-Scale Current 500µA to 2mA
Full-Scale Range for Each DAC Determined by
External Resistors
15 Settings Each for Sink and Source Modes
I
2
C-Compatible Serial Interface
Low Cost
Small Package (8-Pin µSOP)
-40°C to +85°C Temperature Range
2.7V to 5.5V Operation
DS4412
Dual-Channel, I
2
C Adjustable
Sink/Source Current DAC
DC-DC
CONVERTER
FB
OUT
SDA
SCL
OUT0
OUT1
GND
R
FS0
R
FS1
4.7kΩ4.7kΩ
V
CC
V
CC
V
OUT0
FS0
FS1
R
0B
R
0A
DC-DC
CONVERTER
FB
OUT
V
OUT1
R
1B
R
1A
DS4412
Typical Operating Circuit
Ordering Information
Rev 0; 9/07
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead-free package.
T&R = Tape and reel.
PART TEMP RANGE PIN-PACKAGE
DS4412U+ -40°C to +85°C 8 μSOP
DS4412U+T&R -40°C to +85°C 8 μSOP
1
2
3
4
8
7
6
5
V
CC
OUT1
OUT0
FS0GND
FS1
SCL
SDA
μ
SOP
TOP VIEW
+
DS4412
Pin Configuration
Seitenansicht 0
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Inhaltsverzeichnis

Seite 1 - Sink/Source Current DAC

General DescriptionThe DS4412 contains two I2C adjustable-current DACsthat are each capable of sinking or sourcing current. Eachoutput has 15 sink and

Seite 2

DS4412Dual-Channel, I2C AdjustableSink/Source Current DAC2 _______________________________________________________________________________________ABSO

Seite 3

DS4412Dual-Channel, I2C AdjustableSink/Source Current DAC_______________________________________________________________________________________ 3Note

Seite 4

Pin DescriptionNAME PIN FUNCTION SDA 1 I2C Serial Data. Input/output for I2C data. SCL 2 I2C Serial Clock. Input for I2C clock. FS1 3 FS0 5 Full-Scal

Seite 5

Block DiagramVCCVCCRFS0RFS1SDA SCLGNDFS0FS1OUT1OUT0CURRENTDAC0 F8h F9hSOURCE ORSINK MODE15 POSITIONSEACH FOR SINKAND SOURCEMODECURRENTDAC1I2C-COMPATIB

Seite 6

Detailed DescriptionThe DS4412 contains two I2C adjustable-currentsources that are each capable of sinking and sourcingcurrent. Each output, OUT0 and

Seite 7

SDASCLtHD:STAtLOWtHIGHtRtFtBUFtHD:DATtSU:DATREPEATEDSTARTtSU:STAtHD:STAtSU:STOtSPSTOPNOTE: TIMING IS REFERENCED TO VIL(MAX) AND VIH(MIN).STARTFigure 1

Seite 8

read sequence or as an indication that the device isnot receiving data.Byte Write: A byte write consists of 8 bits of informa-tion transferred from th

Seite 9

DS4412Dual-Channel, I2C AdjustableSink/Source Current DACMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely emb

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