Rainbow Electronics MAX5176 User Manual

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General Description

The MAX5174/MAX5176 low-power, serial, voltage-out­put, 12-bit digital-to-analog converters (DACs) feature a
precision output amplifier in a space-saving 16-pin
QSOP package. The MAX5174 operates from a single
+5V supply, and the MAX5176 operates from a single
+3V supply. Both devices draw only 280µA of supply
current, which reduces to 1µA in shutdown. In addition,
the programmable power-up reset feature allows for a
user-selectable output voltage state of either 0 or mid­scale.

The 3-wire, digital, serial interface is compatible with
SPI™/QSPI™, and MICROWIRE™ standards. An input
register followed by a DAC register provides a double­buffered input, allowing the input and DAC registers to
be updated independently or simultaneously with a 16­bit serial word. Additional features include software and
hardware shutdown, shutdown lockout, a hardware
clear pin, and a reference input capable of accepting
DC and offset AC signals. These devices provide a pro­grammable digital output pin for added functionality
and a serial-data output pin for daisy-chaining. All logic
inputs are TTL/CMOS compatible and are internally
buffered with Schmitt triggers to allow direct interfacing
to optocouplers.

The MAX5174/MAX5176 incorporate a proprietary on­chip circuit that keeps the output voltage virtually
“glitch free,” limiting the glitches to a few millivolts dur­ing power-up.

Both devices are available in 16-pin QSOP packages
and are specified for the extended (-40°C to +85°C)
temperature range. The MAX5170/MAX5172 are pin­compatible 14-bit upgrades to the MAX5174/MAX5176.
For 100% pin-compatible DACs with internal reference,
see the 13-bit MAX5130/MAX5131 and the 12-bit
MAX5120/MAX5121 data sheets.

Applications

Industrial Process Controls
Digital Offset and Gain Adjustment
Motion Control
Automatic Test Equipment (ATE)
Remote Industrial Controls
µP-Controlled Systems

Features

♦ ±1 LSB INL
♦ 1µA Shutdown Current
♦ “Glitch Free” Output Voltage at Power-Up
♦ Single-Supply Operation

+5V (MAX5174)
+3V (MAX5176)

♦ Full-Scale Output Range

+2.048V (MAX5176, V

REF

= +1.25V)

+4.096V (MAX5174, V

REF

= +2.5V )

♦ Rail-to-Rail®Output Amplifier
♦ Adjustable Output Offset
♦ Low THD (-80dB) in Multiplying Operation
♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial

Interface

♦ Programmable Shutdown Mode and Power-Up

Reset

♦ Buffered Output Capable of Driving 5kΩ || 100pF

Loads

♦ User-Programmable Digital Output Pin Allows

Serial Control of External Components

♦ 14-Bit Upgrades Available (MAX5170/MAX5172)

MAX5174/MAX5176

Low-Power, Serial, 12-Bit DACs

with Voltage Output

________________________________________________________________

Maxim Integrated Products

1

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

OS V

DD

N.C.
REF
AGND

PDL

UPO
DOUT
DGND

TOP VIEW

MAX5174
MAX5176

QSOP

OUT

RS

CS

SHDN

CLR

DIN

SCLK

19-1475; Rev 0; 4/99

PART

MAX5174AEEE

MAX5174BEEE
MAX5176AEEE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

16 QSOP
16 QSOP
16 QSOP

Pin Configuration

Ordering Information

MAX5176BEEE -40°C to +85°C 16 QSOP

INL

(LSB)

±1
±2
±2
±4

Functional Diagram appears at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

MAX5174/MAX5176

Low-Power, Serial, 12-Bit DACs
with Voltage Output

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX5174

(VDD= +5V ±10%, V

REF

= 2.5V, OS = AGND = DGND, RL= 5kΩ, CL= 100pF referenced to ground, TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

A

= +25°C.)

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.

VDDto AGND, DGND............................................-0.3V to +6.0V

AGND to DGND.....................................................-0.3V to +0.3V

Digital Inputs to DGND..........................................-0.3V to +6.0V

DOUT, UPO to DGND ................................-0.3V to (VDD+ 0.3V)

OUT, REF to AGND ...................................-0.3V to (VDD+ 0.3V)

OS to AGND ...............................(AGND - 4.0V) to (VDD+ 0.3V)

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (TA= +70°C)

16-Pin QSOP (derate 8mW/°C above +70°C)..............667mW

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

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

Bits12Resolution
MAX5174A ±1
MAX5174B

LSB

±2

INLIntegral Nonlinearity (Note 1)

LSB±1DNLDifferential Nonlinearity

mV±10V

OS

Offset Error (Note 2)

RL= ∞

LSB

-0.6 ±4

GEGain Error

RL= 5kΩ -1.6 ±8

µV/V10 120PSRRPower-Supply Rejection Ratio

f = 100kHz LSBp-p1Output Noise Voltage

nV/√Hz

80Output Thermal Noise Density

V0V

DD

- 1.4V

REF

Reference Input Range

kΩ18R

REF

Reference Input Resistance

V

REF

= 0.5Vp-p + 1.5VDC, slew-rate limited kHz350Reference -3dB Bandwidth

V

REF

= 2Vp-p + 1.5VDC, f = 10kHz,

code = FFF hex

dB82SINAD

Signal-to-Noise Plus Distortion
Ratio

V3V

IH

Input High Voltage

V0.8V

IL

Input Low Voltage

mV200V

HYS

Input Hysteresis

VIN= 0 or V

DD

µA0.001 ±1I

IN

Input Leakage Current

pF8C

IN

Input Capacitance

I

SOURCE

= 2mA VVDD- 0.5V

OH

Output High Voltage

I

SINK

= 2mA V0.13 0.4V

OL

Output Low Voltage

V

REF

= 3.6Vp-p + 1.8VDC, f = 1kHz,

code = all 0s

dB-80Reference Feedthrough

STATIC PERFORMANCE

REFERENCE

MULTIPLYING-MODE PERFORMANCE

DIGITAL INPUTS

DIGITAL OUTPUTS

MAX5174/MAX5176

Low-Power, Serial, 12-Bit DACs

with Voltage Output

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX5174 (continued)

(VDD= +5V ±10%, V

REF

= 2.5V, OS = AGND = DGND, RL= 5kΩ, CL= 100pF referenced to ground, TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

A

= +25°C.)

CONDITIONS

V/µs0.6SRVoltage Output Slew Rate

V0V

DD

Output Voltage Swing (Note 3)

kΩ80 120OS Pin Input Resistance

µs40Time Required to Exit Shutdown

UNITSMIN TYP MAXSYMBOLPARAMETER

CS = VDD, f

SCLK

= 100kHz, V

SCLK

= 5Vp-p

nV-s1Digital Feedthrough

V4.5 5.5V

DD

Positive Supply Voltage

mA0.35 0.4I

DD

Power-Supply Current (Note 4)

µA110Shutdown Current (Note 4)

ns100t

CP

SCLK Clock Period

ns40t

CH

SCLK Pulse Width High

ns40t

CL

SCLK Pulse Width Low

ns40t

CSS

CS Fall to SCLK Rise Setup
Time

ns40t

DS

SDI Setup Time

ns0t

DH

SDI Hold Time

C

LOAD

= 200pF ns80t

DO1

SCLK Rise to DOUT Valid
Propagation Delay

C

LOAD

= 200pF ns80t

DO2

SCLK Fall to DOUT Valid
Propagation Delay

ns10t

CS0

SCLK Rise to CS Fall Delay

ns100t

CSW

CS Pulse Width High

ns0t

CSH

SCLK Rise to CS Rise Hold
Time

ns40t

CS1

CS Rise to SCLK Rise Hold Time

To ±0.5LSB, from 10mV to full-scale µs18Output Settling Time

DYNAMIC PERFORMANCE

POWER SUPPLIES

TIMING CHARACTERISTICS

MAX5174/MAX5176

Low-Power, Serial, 12-Bit DACs
with Voltage Output

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX5176

(VDD= +2.7V to +3.6V, V

REF

= 1.25V, OS = AGND = DGND, RL= 5kΩ, CL= 100pF referenced to ground, TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

A

= +25°C).

Bits12Resolution

MAX5176A ±2

V

REF

= 1.6Vp-p + 0.8VDC, f = 1kHz,

code = all 0s

dB

MAX5176B

LSB

±4

INLIntegral Nonlinearity (Note 5)

LSB±1DNLDifferential Nonlinearity

mV±10

CONDITIONS

V

OS

Offset Error (Note 2)

RL= ∞

LSB

-0.6 ±4

GEGain Error

RL= 5kΩ -1.6 ±8

-80

µV/V10 120PSRRPower-Supply Rejection Ratio

f = 100kHz LSBp-p2Output Noise Voltage

nV/√Hz

80Output Thermal Noise Density

V0V

DD

- 1.4V

REF

Reference Input Range

kΩ18R

REF

Reference Input Resistance

V

REF

= 0.5Vp-p + 0.75VDC, slew-rate limited kHz350Reference -3dB Bandwidth

V

REF

= 0.6Vp-p + 0.9VDC, f = 10kHz,

code = FFF hex

dB78SINAD

Signal-to-Noise Plus Distortion
Ratio

Reference Feedthrough

V2.2V

IH

Input High Voltage

V0.8V

IL

Input Low Voltage

mV200V

HYS

Input Hysteresis

VIN= 0 or V

DD

µA0.001 ±1I

IN

Input Leakage Current

UNITSMIN TYP MAXSYMBOLPARAMETER

pF8C

IN

Input Capacitance

I

SOURCE

= 2mA VVDD- 0.5V

OH

Output High Voltage

I

SINK

= 2mA V0.13 0.4V

OL

Output Low Voltage

STATIC PERFORMANCE

REFERENCE

MULTIPLYING-MODE PERFORMANCE

DIGITAL INPUT

DIGITAL OUTPUT

MAX5174/MAX5176

Low-Power, Serial, 12-Bit DACs

with Voltage Output

_______________________________________________________________________________________ 5

Note 1: INL guaranteed between codes 10 and 4095.
Note 2: Offset is measured at the code that comes closest to 10mV.
Note 3: Accuracy is better than 1 LSB for V

OUT

= 10mV to VDD- 180mV. Guaranteed by PSR test on end points.

Note 4: R

L

= open and digital inputs are either VDDor DGND.

Note 5: INL guaranteed between codes 20 and 4095.

ELECTRICAL CHARACTERISTICS—MAX5176 (continued)

(VDD= +2.7V to +3.6V, V

REF

= 1.25V, OS = AGND = DGND, RL= 5kΩ, CL= 100pF referenced to ground, TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at T

A

= +25°C).

Power-Supply Current (Note 4) I

DD

0.35 0.4 mA

Positive Supply Voltage V

DD

2.7 3.6 V

Digital Feedthrough 1 nV-s

CS = VDD, DIN = 50kHz; f

SCLK

= 100kHz,

V

SCLK

= 3Vp-p

PARAMETER SYMBOL MIN TYP MAX UNITS

Time Required to Exit Shutdown 40 µs

OS Pin Input Resistance 80 120 kΩ

Output Voltage Swing (Note 3) 0 V

DD

V

Voltage Output Slew Rate

SR 0.6 V/µs

CS Pulse Width High

t

CSW

150 ns

SCLK Rise to CS Fall Delay

t

CS0

10 ns

Output Settling Time 18 µsTo ±0.5LSB, from 10mV to full-scale

SCLK Fall to DOUT Valid
Propagation Delay

t

DO2

200 nsC

LOAD

= 200pF

CS Rise to SCLK Rise Hold Time

t

CS1

75 ns

SCLK Rise to DOUT Valid
Propagation Delay

t

DO1

200 nsC

LOAD

= 200pF

SDI Hold Time t

DH

0 ns

SDI Setup Time t

DS

60 ns

SCLK Rise to CS Rise Hold Time

t

CSH

0 ns

CSB Fall to SCLK Rise Setup

Time

t

CSS

60 ns

SCLK Pulse Width Low t

CL

CONDITIONS

75 ns

SCLK Pulse Width High t

CH

75 ns

SCLK Clock Period t

CP

150 ns

Shutdown Current (Note 4) 110µA

DYNAMIC PERFORMANCE

POWER SUPPLIES

TIMING CHARACTERISTICS