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PDF DS4412 Data sheet ( Hoja de datos )
| Número de pieza | DS4412 | |
| Descripción | I2C Adjustable Sink/Source Current DAC | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Rev 0; 9/07
Dual-Channel, I2C Adjustable
Sink/Source Current DAC
General Description
The DS4412 contains two I2C 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 I2C 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
Pin Configuration
TOP VIEW
+
SDA 1
SCL 2
FS1 3
DS4412
GND 4
μSOP
8 VCC
7 OUT1
6 OUT0
5 FS0
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
♦ I2C-Compatible Serial Interface
♦ Low Cost
♦ Small Package (8-Pin µSOP)
♦ -40°C to +85°C Temperature Range
♦ 2.7V to 5.5V Operation
Ordering Information
PART
DS4412U+
DS4412U+T&R
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
+Denotes a lead-free package.
T&R = Tape and reel.
PIN-PACKAGE
8 μSOP
8 μSOP
Typical Operating Circuit
4.7kΩ
4.7kΩ
SDA
SCL
GND
VCC
DS4412
OUT0
OUT1
FS0
RFS0
FS1
RFS1
VCC VOUT0
OUT
DC-DC
CONVERTER
FB
R0A
R0B
VOUT1
OUT
DC-DC
CONVERTER
FB
R1A
R1B
________________________________________________________________ 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.
1 page  
www.DataSheet4U.com
Dual-Channel, I2C Adjustable
Sink/Source Current DAC
Typical Operating Characteristics (continued)
(Applies to OUT0 and OUT1. VCC = 2.7V to 5.0V, SDA = SCL = VCC, TA = +25°C, and no loads on OUT0, OUT1, FS0, or FS1, unless
otherwise noted.)
1.0000
0.7500
INTEGRAL LINEARITY
RANGE FOR THE 0.5mA TO 2.0mA
CURRENT SOURCE AND SINK RANGE
0.5000
0.2500
0.0000
-0.2500
-0.5000
-0.7500
-1.0000
0
5 10
SETTING (DEC)
15
DIFFERENTIAL LINEARITY
1.0
RANGE FOR THE 0.5mA TO 2.0mA
0.8 CURRENT SOURCE AND SINK RANGE
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
5 10
SETTING (DEC)
15
Block Diagram
SDA SCL
VCC
VCC
F8h
SOURCE OR
SINK MODE
GND
CURRENT
DAC0
I2C-COMPATIBLE
SERIAL INTERFACE
F9h
15 POSITIONS
EACH FOR SINK
AND SOURCE
MODE
CURRENT
DAC1
DS4412
FS0
RFS0
OUT0
FS1
RFS1
OUT1
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet DS4412.PDF ] | |
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