DS4432U+TR MAXIM [Maxim Integrated Products], DS4432U+TR Datasheet

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DS4432U+TR

Manufacturer Part Number
DS4432U+TR
Description
Dual-Channel, I2C, 7-Bit Sink/Source Current DAC
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
The DS4432 contains two I
DACs that are each capable of sinking and sourcing
current up to 200µA. Each DAC output has 127 sink
and 127 source settings that are programmed using the
I
high-impedance state.
Rev 0; 12/08
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.
2
C interface. The current DAC outputs power up in a
Power-Supply Adjustment
Power-Supply Margining
Adjustable Current Sink or Source
4.7kΩ
TOP VIEW
GND
SDA
SCL
FS1
________________________________________________________________ Maxim Integrated Products
1
2
3
4
4.7kΩ
+
General Description
SDA
SCL
GND
μSOP
DS4432
R
Pin Configuration
FS0
Dual-Channel, I
2
C programmable current
FS0
DS4432
V
CC
Applications
8
7
6
5
FS1
R
OUT0
OUT1
V
OUT1
OUT0
FS0
FS1
CC
CONVERTER
DC-DC
V
CC
♦ Two Current DACs
♦ Full-Scale Current 50µA to 200µA
♦ Full-Scale Range for Each DAC Determined by
♦ 127 Settings Each for Sink and Source Modes
♦ I
♦ Low Cost
♦ Small Package (8-Pin µSOP)
♦ -40°C to +85°C Temperature Range
♦ 2.7V to 5.5V Operating Range
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
DS4432U+
DS4432U+T&R
External Resistors
2
C-Compatible Serial Interface
2
PART
FB
OUT
C, 7-Bit Sink/Source
V
OUT0
R
R
0A
0B
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
CONVERTER
Current DAC
DC-DC
OUT
FB
V
OUT1
PIN-PACKAGE
8 μSOP
8 μSOP
R
R
Features
1A
1B
1

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DS4432U+TR Summary of contents

Page 1

Rev 0; 12/08 Dual-Channel, I General Description 2 The DS4432 contains two I C programmable current DACs that are each capable of sinking and sourcing current up to 200µA. Each DAC output has 127 sink and 127 source settings that ...

Page 2

Dual-Channel, I Current DAC ABSOLUTE MAXIMUM RATINGS Voltage Range SDA, and SCL CC Relative to Ground.............................................-0.5V to +6.0V Voltage Range on FS0, FS1, OUT0, OUT1 Relative to Ground..................................-0. Stresses beyond those listed under “Absolute Maximum ...

Page 3

Dual-Channel, I OUTPUT CURRENT SOURCE CHARACTERISTICS (continued +2.7V to +5.5V -40°C to +85°C.) CC PARAMETER SYMBOL Output Current Variation Due to Power-Supply Change Output Current Variation Due to Output-Voltage Change Output Leakage Current at Zero ...

Page 4

Dual-Channel, I Current DAC NAME PIN 2 SDA Serial Data. Input/output for I 2 SCL Serial Clock. Input for I FS1 3 Full-Scale Calibration Inputs. A resistor to ground on these pins determines the ...

Page 5

Dual-Channel, I (Applies to OUT0 and OUT1 2.7V to 5.0V, SDA = SCL = V CC otherwise noted.) INTEGRAL LINEARITY 1.0 RANGE FOR THE 50μA TO 200μA CURRENT 0.8 SOURCE AND SINK RANGE. 0.6 0.4 0.2 0 -0.2 ...

Page 6

Dual-Channel, I Current DAC Detailed Description 2 The DS4432 contains two I C adjustable current DACs that are each capable of sinking and sourcing current. Each output (OUT0 and OUT1) has 127 sink and 127 source settings that can be ...

Page 7

Dual-Channel, I Slave Devices: Slave devices send and receive data at the master’s request. Bus Idle or Not Busy: Time between STOP and START conditions when both SDA and SCL are inac- tive and in their logic-high states. When the ...

Page 8

Dual-Channel, I Current DAC 2 TYPICAL I C WRITE TRANSACTION MSB LSB START R/W READ/ SLAVE WRITE ADDRESS 2 EXAMPLE I C TRANSACTIONS 90h A) SINGLE BYTE WRITE SLAVE ...

Page 9

Dual-Channel chosen to be 100µA (midrange source/sink OUT0 current for the DS4432). Summing the currents into the feedback node, we have the following − I OUT where V ...

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