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DS4404N+TR Datasheet

Download or read online Maxim Integrated DS4404N+TR Two/Four-Channel, I2C Adjustable Current DAC pdf datasheet.



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Rev 2; 10/08
Two/Four-Channel, I
General Description
The DS4402 and DS4404 contain two and four I
adjustable current DACs, respectively, that are each
capable of sinking or sourcing current. Each output has
31 sink and 31 source settings that are programmed by
2
the I
C interface. External resistors set the full-scale
range and step size of each output.
Power-Supply Adjustment
Power-Supply Margining
Adjustable Current Sink or Source
Pin Configuration
TOP VIEW
SDA
1
2
SCL
GND
3
FS3 (N.C.)
4
DS4404/
FS2 (N.C.)
5
DS4402
FS1
6
*EP
FS0
7
TDFN-EP
×
×
(3mm
3mm
0.8mm)
*EXPOSED PAD
( ) INDICATES FOR DS4402 ONLY.
4.7kΩ
4.7kΩ
V
CC
SDA
SCL
DS4402
A1
A0
GND
FS0
R
FS0
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 Adjustable Current DAC
♦ Two (DS4402) or Four (DS4404) Current DACs
2
C
♦ Full-Scale Range for Each DAC Determined by
External Resistors
♦ 31 Settings Each for Sink and Source Modes
♦ I
2
C-Compatible Serial Interface
♦ Two Three-Level Address Pins Allow Nine
Applications
Devices on Same I
♦ Low Cost
♦ Small Package (14-Pin TDFN)
♦ -40°C to +85°C Temperature Range
♦ 2.7V to 5.5V Operation
PART
14
OUT3 (N.C.)
DS4402N+
13
V
CC
DS4402N+T&R
OUT2 (N.C.)
12
DS4404N+
11
A1
DS4404N+T&R
10
OUT1
+ Denotes a lead-free/RoHS-compliant package.
T&R = Tape and reel.
9
A0
* EP = Exposed pad.
OUT0
8
V
V
CC
OUT
DC/DC
CONVERTER
FB
OUT0
OUT1
FS1
R
FS1
______________________________________________ Maxim Integrated Products
Features
2
C Bus
Ordering Information
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
14 TDFN-EP*
-40°C to +85°C
14 TDFN-EP*
-40°C to +85°C
14 TDFN-EP*
-40°C to +85°C
14 TDFN-EP*
Typical Operating Circuit
OUT0
V
OUT1
OUT
DC/DC
R
R
0A
1A
CONVERTER
FB
R
R
0B
1B
1

Summary of Contents

Page 1

... EP Exposed pad. OUT0 OUT DC/DC CONVERTER FB OUT0 OUT1 FS1 R FS1 ___ Maxim Integrated Products Features 2 C Bus Ordering Information TEMP RANGE PIN-PACKAGE -40°C to 85°C 14 TDFN-EP -40°C to 85°C 14 TDFN-EP -40°C to 85°C 14 TDFN-EP -40°C to 85°C 14 TDFN-EP Typical Operating Circuit ...

Page 2

Two/Four-Channel, I ABSOLUTE MAXIMUM RATINGS Voltage Range SDA, and SCL CC Relative to Ground...-0.5V to 6.0V Voltage Range on A0, A1, FS0, FS1, FS2, FS3, OUT0, OUT1, OUT2, and OUT3 Relative to Ground ...-0. ...

Page 3

Two/Four-Channel, I OUTPUT CURRENT CHARACTERISTICS (continued 2.7V to 5.5V -40°C to 85°C.) CC PARAMETER Output-Current Power-Supply Rejection Ratio Output Leakage Current at Zero Current Setting Output-Current Differential Linearity Output-Current Integral Linearity ...

Page 4

Two/Four-Channel, I PIN NAME DS4404 DS4402 1 1 SDA 2 2 SCL 3 3 GND 4 FS3 5 FS2 6 6 FS1 7 7 FS0 8 8 OUT0 10 10 OUT1 12 OUT2 14 OUT3 9, ...

Page 5

Two/Four-Channel, I Detailed Description The DS4402/DS4404 contain two/four I current sources (Figure 1) that are each capable of sinking and sourcing current. Each output has 31 sink and 31 source settings that are programmed through 2 the I C interface. ...

Page 6

Two/Four-Channel, I Memory Organization To control the DS4402/DS4404s current sources, write to the memory addresses listed in Table 2. Table 2. Memory Addresses MEMORY ADDRESS CURRENT SOURCE (HEXADECIMAL) F8h F9h FAh FBh Only for DS4404. The format of each output ...

Page 7

Two/Four-Channel, I Acknowledgement (ACK and NACK): An Acknowledge- ment (ACK) or Not Acknowledge (NACK) is always the ninth bit transmitted during a byte transfer. The device receiving data (the master during a read or the slave during a write operation) ...

Page 8

Two/Four-Channel, I Applications Information Example Calculations for an Adjustable Power Supply Using the typical circuit, assuming a typical output volt- age of 2.0V, a feedback voltage of 0.8V 500Ω, and R2 333Ω, to adjust or margin the ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ___ 9 © 2008 Maxim Integrated Products is a registered trademark of Dallas Semiconductor Corporation ...

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