DS4402U+T&R datasheet, PDF - EEWORLD Datasheet

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DS4402U+T&R: DescriptionD/A Converter, 1 Func, Serial Input Loading, LEAD FREE, USOP-10; CategoryAnalog mixed-signal IC converter; File Size162KB，9 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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DS4402U+T&R Overview

D/A Converter, 1 Func, Serial Input Loading, LEAD FREE, USOP-10

DS4402U+T&R Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	SOIC
package instruction	TSSOP,
Contacts	10
Reach Compliance Code	compliant
Maximum analog output voltage	4 V
Minimum analog output voltage
Converter type	D/A CONVERTER
Enter bit code	BINARY
Input format	SERIAL
JESD-30 code	S-XDSO-G10
length	3 mm
Maximum linear error (EL)	0.3906%
Number of digits	8
Number of functions	1
Number of terminals	10
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	TSSOP
Package shape	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Maximum seat height	1.1 mm
Nominal supply voltage	4 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3 mm

DS4402U+T&R Preview

19-4641; Rev 3; 5/09

Two/Four-Channel, I

C Adjustable Current DAC

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.

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

♦

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

Applications

Power-Supply Adjustment

Power-Supply Margining

Adjustable Current Sink or Source

Pin Configuration

TOP VIEW

SDA

SCL

GND

FS3 (N.C.)

FS2 (N.C.)

FS1

FS0

*EP

OUT0

OUT3 (N.C.)

OUT2 (N.C.)

OUT1

Ordering Information

PART

DS4402N+

DS4402N+T&R

DS4404N+

DS4404N+T&R

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

14 TDFN-EP*

TDFN

(3mm

3mm

0.8mm)

*EXPOSED PAD

( ) INDICATES FOR DS4402 ONLY.

DS4404/

DS4402

+Denotes

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

T&R = Tape and reel.

*EP

= Exposed pad.

Typical Operating Circuit

OUT0

OUT1

4.7kΩ

SDA

SCL

GND

DC/DC

CONVERTER

OUT

DC/DC

CONVERTER

OUT

DS4402

OUT0

OUT1

FS0

FS1

______________________________________________

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.

Two/Four-Channel, I

C Adjustable Current DAC

DS4402/DS4404

ABSOLUTE MAXIMUM RATINGS

Voltage Range on V

, 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 (V

+ 0.5V) (Not to exceed 6.0V.)

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .....................................Refer to IPC/JEDEC

J-STD-020 Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED OPERATING CONDITIONS

= -40°C to +85°C.)

PARAMETER

Supply Voltage

Input Logic 1 (SDA, SCL, A0, A1)

Input Logic 0 (SDA, SCL, A0, A1)

SYMBOL

(Note 1)

CONDITIONS

MIN

2.7

0.7 x V

-0.3

TYP

MAX

5.5

+ 0.3

0.3 x V

UNITS

DC ELECTRICAL CHARACTERISTICS

= +2.7V to +5.5V, T

= -40°C to +85°C.)

PARAMETER

Supply Current

Input Leakage (SDA, SCL)

Output Leakage (SDA)

Output Current Low (SDA)

Address Input Resistors

Reference Voltage

I/O Capacitance

SYMBOL

REF

I/O

= 0.4V

= 0.6V

240

1.23

= 5.5V

(Note 2)

= 5.5V

CONDITIONS

DS4402

DS4404

MIN

TYP

MAX

500

UNITS

μA

OUTPUT CURRENT CHARACTERISTICS

= +2.7V to +5.5V, TA = -40°C to +85°C.)

PARAMETER

Output Voltage for Sinking Current

Output Voltage for Sourcing

Current

Full-Scale Sink Output Current

Full-Scale Source Output Current

Output-Current Full-Scale

Accuracy

Output-Current Temperature Drift

SYMBOL

OUT:SINK

OUT:SOURCE

OUT:SINK

OUT:SOURCE

OUT:FS

OUT:TC

(Note 3)

+25°C, V

= 4.0V; using ideal R

resistor; V

OUT:SINK

= 0.5V;

OUT:SOURCE

= V

- 0.8V

(Note 4)

CONDITIONS

MIN

0.5

-2.0

2.5

TYP

MAX

0.5

2.0

-0.5

5.0

UNITS

ppm/°C

______________________________________________________________________

Two/Four-Channel, I

C Adjustable Current DAC

OUTPUT CURRENT CHARACTERISTICS (continued)

= +2.7V to +5.5V, TA = -40°C to +85°C.)

PARAMETER

Output-Current Power-Supply

Rejection Ratio

Output Leakage Current at Zero

Current Setting

Output-Current Differential

Linearity

Output-Current Integral Linearity

ZERO

DNL

INL

(Note 5)

(Note 6)

SYMBOL

-1

CONDITIONS

MIN

TYP

0.33

0.5

MAX

UNITS

%/V

μA

LSB

DS4402/DS4404

C AC ELECTRICAL CHARACTERISTICS

= +2.7V to +5.5V, T

= -40°C to +85°C.)

PARAMETER

SCL Clock Frequency

Bus Free Time Between STOP

and START Conditions

Hold Time (Repeated) START

Condition

Low Period of SCL

High Period of SCL

Data Hold Time

Data Setup Time

START Setup Time

SDA and SCL Rise Time

SDA and SCL Fall Time

STOP Setup Time

SDA and SCL Capacitive Loading

SYMBOL

SCL

BUF

HD:STA

LOW

HIGH

DH:DAT

SU:DAT

SU:STA

SU:STO

(Note 8)

(Note 7)

CONDITIONS

MIN

1.3

0.6

1.3

0.6

100

0.6

20 +

0.1C

20 +

0.1C

0.6

400

300

0.9

TYP

MAX

400

UNITS

kHz

µs

Note 1:

All voltages with respect to ground. Currents entering the IC are specified positive, and currents exiting the IC are negative.

Note 2:

Supply current specified with all outputs set to zero current setting with all inputs (except A1 and A0, which can be open) driven

to well-defined logic levels. SDA and SCL are connected to V

. Excludes current through R

resistors (I

RFS

). Total current

including I

RFS

is I

+ (2 x I

RFS

Note 3:

The output-voltage full-scale current ranges must be satisfied to ensure the device meets its accuracy and linearity specifications.

Note 4:

Temperature drift excludes drift caused by external resistor.

Note 5:

Differential linearity is defined as the difference between the expected incremental current increase with respect to position

and the actual increase. The expected incremental increase is the full-scale range divided by 31.

Note 6:

Integral linearity is defined as the difference between the expected value as a function of the setting and the actual value.

The expected value is a straight line between the zero and the full-scale values proportional to the setting.

Note 7:

Timing shown is for fast-mode (400kHz) operation. This device is also backward compatible with I

C standard-mode timing.

Note 8:

—total capacitance of one bus line in pF.

_____________________________________________________________________

Two/Four-Channel, I

C Adjustable Current DAC

DS4402/DS4404

Pin Description

DS4404

9, 11

—

DS4402

—

9, 11

4, 5, 12, 14

—

NAME

SDA

SCL

GND

FS3

FS2

FS1

FS0

OUT0

OUT1

OUT2

OUT3

A0, A1

N.C.

Address Select Inputs. Tri-level inputs (V

, GND, N.C.) determine the I

C slave address.

See the

Detailed Description

section for the nine available device addresses.

Power Supply

No Connection

Exposed Pad. Leave unconnected or connect to GND.

Current Output. Sinks or sources the current determined by the I

C interface and the

resistance connected to FSx. (DS4402 has only two outputs: OUT0 and OUT1.)

Full-Scale Calibration Input. A resistor to ground on these pins determines the full-scale

current for each output. FS0 controls OUT0, FS1 controls OUT1, etc. (DS4402 has only

two inputs: FS0 and FS1.)

FUNCTION

C Serial Data. Input/output for I

C data.

C Serial Clock. Input for I

C clock.

Ground

SDA SCL

C-COMPATIBLE

SERIAL INTERFACE

DS4402/DS4404

F8h

SOURCE OR

SINK MODE

GND

CURRENT

DAC0

F9h

31-POSITIONS

EACH FOR SINK

AND SOURCE

MODE

FAh

FBh

CURRENT

DAC1

CURRENT

DAC2

CURRENT

DAC3

FS0

OUT0

FS1

OUT1

FS2

OUT2

FS3

OUT3

DS4404

Figure 1. Functional Diagram

______________________________________________________________________

Two/Four-Channel, I

C Adjustable Current DAC

Detailed Description

The DS4402/DS4404 contain two/four I

C 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

C interface. The full-scale ranges (and corre-

sponding step sizes) of the outputs are determined by

external resistors that adjust the output currents over a

4:1 range. The formula to determine the external resis-

tor values (R

) for each of the outputs is given by:

Equation 1:

= (V

REF

/ I

) x (31 / 4)

where I

= desired full-scale current

On power-up, the DS4402/DS4404 output zero current.

This is done to prevent it from sinking or sourcing an

incorrect current before the system host controller has

had a chance to modify the device’s setting.

As a source for biasing instrumentation or other cir-

cuits, the DS4402/DS4404 provide a simple and inex-

pensive current source with an I

C interface for control.

The adjustable full-scale range allows the application to

get the most out of its 5-bit sink or source resolution.

When used in adjustable power-supply applications

(see the

Typical Operating Circuit),

the DS4402/DS4404

do not affect the initial power-up supply voltage because

it defaults to providing zero output current on power-up.

As it sources or sinks current into the feedback voltage

node, it changes the amount of output voltage required

by the regulator to reach its steady state operating point.

By using the external resistor to set the output current

range, the devices provide flexibility for adjusting the

impedances of the feedback network or the range over

which the power supply can be controlled or margined.

DS4402/DS4404

ADDRESS

DECODE

Figure 2. I

C Address Inputs

Table 1 lists the slave address determined by the

address input combinations.

Table 1. Slave Addresses

GND

N.C.

GND

N.C.

GND

N.C.

SLAVE ADDRESS

(HEXADECIMAL)

90h

92h

94h

96h

98h

9Ah

9Ch

9Eh

A0h

C Slave Address

The DS4402/DS4404 respond to one of nine I

C slave

addresses determined by the two tri-level address

inputs. The three input states are connected to V

connected to ground, or disconnected. To sense the

disconnected state (Figure 2), the address inputs have

weak internal resistors that pull the pins to mid-supply.

_____________________________________________________________________

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DS4402U+T&R Related Products

	DS4402U+T&R	DS4402U+
Description	D/A Converter, 1 Func, Serial Input Loading, LEAD FREE, USOP-10	D/A Converter, 1 Func, Serial Input Loading, LEAD FREE, USOP-10
Is it Rohs certified?	conform to	conform to
Maker	Maxim	Maxim
Parts packaging code	SOIC	SOIC
package instruction	TSSOP,	TSSOP,
Contacts	10	10
Reach Compliance Code	compliant	compliant
Maximum analog output voltage	4 V	4 V
Converter type	D/A CONVERTER	D/A CONVERTER
Enter bit code	BINARY	BINARY
Input format	SERIAL	SERIAL
JESD-30 code	S-XDSO-G10	S-XDSO-G10
length	3 mm	3 mm
Maximum linear error (EL)	0.3906%	0.3906%
Number of digits	8	8
Number of functions	1	1
Number of terminals	10	10
Maximum operating temperature	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C
Package body material	UNSPECIFIED	UNSPECIFIED
encapsulated code	TSSOP	TSSOP
Package shape	SQUARE	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED
Certification status	Not Qualified	Not Qualified
Maximum seat height	1.1 mm	1.1 mm
Nominal supply voltage	4 V	4 V
surface mount	YES	YES
Temperature level	INDUSTRIAL	INDUSTRIAL
Terminal form	GULL WING	GULL WING
Terminal pitch	0.5 mm	0.5 mm
Terminal location	DUAL	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED
width	3 mm	3 mm

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