Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) TDFN 14 EP

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Maxim Integrated Products

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.

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

the I

C interface. External resistors set the full-scale

range and step size of each output.

Applications

Power-Supply Adjustment

Power-Supply Margining

Adjustable Current Sink or Source

Features

♦ Two (DS4402) or Four (DS4404) Current DACs

♦ Full-Scale Range for Each DAC Determined by

External Resistors

♦ 31 Settings Each for Sink and Source Modes

♦ I

C-Compatible Serial Interface

♦ Two Three-Level Address Pins Allow Nine

Devices on Same I

C Bus

♦ Small Package (14-Pin TDFN)

♦ -40°C to +85°C Temperature Range

♦ 2.7V to 5.5V Operation

DS4402/DS4404

Two/Four-Channel, I

C Adjustable Current DAC

DC/DC

CONVERTER

OUT

SDA

SCL

A1 OUT0

OUT1

GND

FS0

FS1

4.7kΩ4.7kΩ

OUT0

FS0

FS1

DS4402

DC/DC

CONVERTER

OUT

OUT1

Typical Operating Circuit

Ordering Information

19-4641; Rev 3; 5/09

Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

DS4402N+ -40°C to +85°C 14 TDFN-EP*

DS4402N+T&R -40°C to +85°C 14 TDFN-EP*

DS4404N+ -40°C to +85°C 14 TDFN-EP*

DS4404N+T&R -40°C to +85°C 14 TDFN-EP*

TDFN

TOP VIEW

OUT1

SCL

FS3 (N.C.)

FS2 (N.C.)

*EXPOSED PAD

( ) INDICATES FOR DS4402 ONLY.

OUT3 (N.C.)

OUT2 (N.C.)

SDA

GND

A0FS1

OUT0FS0

DS4404/

DS4402

*EP

(3mm

3mm

0.8mm)

Pin Configuration

Summary of content (9 pages)

PAGE 1
9-4641; Rev 3; 5/09 Two/Four-Channel, I2C Adjustable Current DAC The DS4402 and DS4404 contain two and four I 2 C 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 the I2C interface. External resistors set the full-scale range and step size of each output.
PAGE 2
DS4402/DS4404 Two/Four-Channel, I2C Adjustable Current DAC ABSOLUTE MAXIMUM RATINGS Voltage Range on VCC, SDA, and SCL 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 ................-0.5V to (VCC + 0.5V) (Not to exceed 6.0V.) Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................
PAGE 3
Two/Four-Channel, I2C Adjustable Current DAC (VCC = +2.7V to +5.5V, TA = -40°C to +85°C.) PARAMETER SYMBOL Output-Current Power-Supply Rejection Ratio Output Leakage Current at Zero Current Setting CONDITIONS MIN DC TYP MAX 0.33 I ZERO -1 UNITS %/V +1 μA Output-Current Differential Linearity DNL (Note 5) 0.5 LSB Output-Current Integral Linearity INL (Note 6) 1 LSB MAX UNITS 400 kHz I2C AC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +5.5V, TA = -40°C to +85°C.
PAGE 4
Two/Four-Channel, I2C Adjustable Current DAC DS4402/DS4404 Pin Description PIN NAME FUNCTION DS4404 DS4402 1 1 SDA I2C Serial Data. Input/output for I2C data. 2 2 SCL I2C Serial Clock. Input for I2C clock. 3 3 GND Ground 4 — FS3 5 — FS2 6 6 FS1 7 7 FS0 8 8 OUT0 10 10 OUT1 12 — OUT2 14 — OUT3 9, 11 9, 11 A0, A1 13 13 VCC — 4, 5, 12, 14 N.C. — — EP Full-Scale Calibration Input.
PAGE 5
Two/Four-Channel, I2C Adjustable Current DAC The DS4402/DS4404 contain two/four I2C adjustable 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 the I 2C interface. The full-scale ranges (and corresponding step sizes) of the outputs are determined by external resistors that adjust the output currents over a 4:1 range.
PAGE 6
DS4402/DS4404 Two/Four-Channel, I2C Adjustable Current DAC Memory Organization To control the DS4402/DS4404’s current sources, write to the memory addresses listed in Table 2. Table 2. Memory Addresses MEMORY ADDRESS (HEXADECIMAL) CURRENT SOURCE F8h OUT0 F9h OUT1 FAh* OUT2* FBh* OUT3* *Only for DS4404.
PAGE 7
Two/Four-Channel, I2C Adjustable Current DAC the slave address in the most significant 7 bits and the R/W bit in the least significant bit. The DS4402/DS4404s’ slave address is determined by the state of the A0 and A1 address pins. Table 1 describes the addresses corresponding to the state of A0 and A1. Byte Write: A byte write consists of 8 bits of information transferred from the master to the slave (most significant bit first) plus a 1-bit acknowledgement from the slave to the master.
PAGE 8
DS4402/DS4404 Two/Four-Channel, I2C Adjustable Current DAC Changing the address select inputs resets the I2C interface. This function aborts the current transaction and puts the SDA driver into a high-impedance state. This hardware reset function should never be required because it is achievable through software, but it does provide an alternative way of resetting the I2C interface, if needed.
PAGE 9
Two/Four-Channel, I2C Adjustable Current DAC PAGES CHANGED REVISION NUMBER REVISION DATE 0 4/06 Initial release. — 1 8/06 In the Features, corrected the operating range from 1.7V to 5.5V to 2.7V to 5.5V. 1 2 10/08 Added the I/O capacitance (CI/O) parameter to the DC Electrical Characteristics table. 2 3 5/09 In the Output Current Characteristics table, added VOUT:SINK = 0.5V; VOUT:SOURCE = VCC = 0.8V to the IOUT:FS conditions.