Rainbow Electronics MAX5253 User Manual

19-1123; Rev 0; 9/96

+3V, Quad, 12-Bit Voltage-Output DAC

with Serial Interface

__________________General Description

The MAX5253 combines four low-power, voltage-output,
12-bit digital-to-analog converters (DACs) and four pre­cision output amplifiers in a space-saving, 20-pin pack­age. In addition to the four voltage outputs, each
amplifier’s negative input is also available to the user.
This facilitates specific gain configurations, remote
sensing, and high output drive capacity, making the
MAX5253 ideal for industrial-process-control applica­tions. Other features include software shutdown, hard­ware shutdown lockout, an active-low reset which clears
all registers and DACs to zero, a user-programmable
logic output, and a serial-data output.

Each DAC has a double-buffered input organized as an
input register followed by a DAC register. A 16-bit serial
word loads data into each input/DAC register. The serial
interface is compatible with SPI™/QSPI™ and

______________________________Features

♦ Four 12-Bit DACs with Configurable

Output Amplifiers

♦ +3.0V to +3.6V Single-Supply Operation
♦ Low Supply Current: 0.82mA Normal Operation

3µA Shutdown Mode

♦ Reference Inputs are High Impedance in Shutdown
♦ Available in 20-Pin SSOP
♦ Power-On Reset Clears all Registers and

DACs to Zero

♦ SPI/QSPI and Microwire Compatible
♦ Simultaneous or Independent Control of DACs

via 3-Wire Serial Interface

♦ User-Programmable Digital Output

Microwire™. It allows the input and DAC registers to be
updated independently or simultaneously with a single
software command. The DAC registers can be simulta­neously updated via the 3-wire serial interface. All logic
inputs are TTL/CMOS-logic compatible.

________________________Applications

Industrial Process Controls
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
Remote Industrial Controls
Microprocessor-Controlled Systems

_________________Ordering Information

PART

MAX5253ACPP
MAX5253BCPP 0°C to +70°C
MAX5253ACAP
MAX5253BCAP 0°C to +70°C

Ordering Information continued on last page.

Pin Configuration appears at end of data sheet.

TEMP. RANGE PIN-PACKAGE

0°C to +70°C

0°C to +70°C 20 SSOP

20 Plastic DIP
20 Plastic DIP

20 SSOP

INL

(LSB)

±1/2
±1
±1/2
±1

_________________________________________________________________________Functional Diagram

MAX5253

DOUT

CL

PDL

DGND

DECODE

CONTROL

16-BIT
SHIFT

REGISTER

SR

DIN

LOGIC

OUTPUT

SCLK

UPO REFCD

CONTROL

CS

SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.

________________________________________________________________

INPUT

REGISTER A

INPUT

REGISTER B

INPUT

REGISTER C

INPUT

REGISTER D

AGND

V

DD

REGISTER A

REGISTER B

REGISTER C

REGISTER D

DAC A

DAC B

DAC C

DAC D

MAX5253

REFAB

DAC A

DAC B

DAC C

DAC D

FBA

OUTA

FBB
OUTB

FBC
OUTC

FBD
OUTD

Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

+3V, Quad, 12-Bit Voltage-Output DAC
with Serial Interface

ABSOLUTE MAXIMUM RATINGS

VDDto AGND...............................................................-0.3V, +6V

to DGND ..............................................................-0.3V, +6V

V

DD

AGND to DGND..................................................................±0.3V

REFAB, REFCD to AGND...........................-0.3V to (V

OUT_, FB_ to AGND...................................-0.3V to (V

Digital Inputs to DGND.............................................-0.3V to +6V

DOUT, UPO to DGND ................................-0.3V to (V

Continuous Current into Any Pin.......................................±20mA

Continuous Power Dissipation (T

MAX5253

Plastic DIP (derate 8.00mW/°C above +70°C).................640mW

SSOP (derate 8.00mW/°C above +70°C) ......................640mW

CERDIP (derate 11.11mW/°C above +70°C).................889mW

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.

= +70°C)

A

DD
DD

DD

+ 0.3V)
+ 0.3V)

+ 0.3V)

ELECTRICAL CHARACTERISTICS

(VDD= +3.0V to +3.6V, AGND = DGND = 0V, REFAB = REFCD = 1.25V, RL= 5kΩ, CL= 100pF, TA= T
noted. Typical values are at T

STATIC PERFORMANCE—ANALOG SECTION

Integral Nonlinearity
(Note 1)

Offset Error

MATCHING PERFORMANCE (TA= +25°C)

REFERENCE INPUT

Reference Input Range
Reference Input Resistance

= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)

A

MAX5253AC/E

INL

MAX5253BC/E
MAX5253BMJP ±2.0
Guaranteed monotonic

OS

VDD= +3.0V to +3.6V

REF

Code-dependent, minimum at code 555 hex

REF

Operating Temperature Ranges

MAX5253_C_P......................................................0°C to +70°C

MAX5253_E_P ...................................................-40°C to +85°C

MAX5253BMJP................................................-55°C to +125°C

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

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

to T

MIN

CONDITIONS

±0.25 ±0.5

, unless otherwise

MAX

±1.0

±6.0 mVV

- 1.4V

DD

UNITSMIN TYP MAXSYMBOLPARAMETER

LSB

LSB±1.0DNLDifferential Nonlinearity

ppm/°C6Offset-Error Tempco

LSBGEGain Error (Note 1) ±4.0

ppm/°C1Gain-Error Tempco

µV/VPSRRPower-Supply Rejection Ratio 300

LSB±4.0GEGain Error

LSB±0.35 ±1.0INLIntegral Nonlinearity

Bits12NResolution

mVOffset Error ±1.0 ±6.0

V0V

kΩ10R

2 _______________________________________________________________________________________

+3V, Quad, 12-Bit Voltage-Output DAC

with Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3.0V to +3.6V, AGND = DGND = 0V, REFAB = REFCD = 1.25V, RL= 5kΩ, CL= 100pF, TA= T
noted. Typical values are at T

MULTIPLYING-MODE PERFORMANCE

Signal-to-Noise Plus
Distortion Ratio

DIGITAL INPUTS

Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance

DIGITAL OUTPUTS

Output High Voltage
Output Low Voltage

DYNAMIC PERFORMANCE

Output Voltage Swing

OUT_ Leakage Current
in Shutdown

Start-Up Time Exiting
Shutdown Mode

POWER SUPPLIES

Supply Voltage
Supply Current

Note 1: Guaranteed from code 11 to code 4095 in unity-gain configuration.
Note 2: Accuracy is better than 0.5LSB for V
Note 3: Remains operational with supply voltage as low as +2.7V.
Note 4: R

= ∞, digital inputs at DGND or VDD.

L

= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)

A

CONDITIONS

V

= 0.67Vp-p

REF

Input code = all 0s, V
V

= 1Vp-p at 25kHz

REF

IH
IL

VIN= 0V or V

IN

IN

I

SOURCE

OH

I

= 2mA

SINK

OL

To ±1/2LSB, V
Rail to rail (Note 2)

RL= ∞

CS = VDD, DIN = 100kHz

(Note 3)

DD

(Note 4)

DD

(Note 4) µA320Supply Current in Shutdown

= 6mV to VDD- 80mV, guaranteed by PSR test on endpoints.

OUT

DD

= 2mA

STEP

REF

= 1.25V

= 1.6Vp-p at 1kHz dB-84Reference Feedthrough

MIN

to T

MAX

DD

MAX5253

, unless otherwise

UNITSMIN TYP MAXSYMBOLPARAMETER

kHz650Reference -3dB Bandwidth

dB72SINAD

V2.0V
V0.8V

µA0.01 ±0.1I

pF8C

VVDD- 0.5V
V0.13 0.4V

V/µs0.6SRVoltage Output Slew Rate

µs16Output Settling Time

V0 to V

µA0 0.1Current into FB_
µA0.01 ±1

µs20

nV-s5Digital Feedthrough
nV-s5Digital Crosstalk

V3.0 3.6V

mA0.82 0.98I

µA0.01 ±1Reference Current in Shutdown

_______________________________________________________________________________________ 3

+3V, Quad, 12-Bit Voltage-Output DAC
with Serial Interface

TIMING CHARACTERISTICS

(VDD= +3.0V to +3.6V, AGND = DGND = 0V, REFAB = REFCD =1.25V, RL= 5kΩ, CL= 100pF, TA= T
noted. Typical values are at T

SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low

MAX5253

CS Fall to SCLK Rise Setup Time
SCLK Rise to CS Rise Hold Time

DIN Setup Time
DIN Hold Time
SCLK Rise to DOUT Valid

Propagation Delay
SCLK Fall to DOUT Valid

Propagation Delay
SCLK Rise to CS Fall Delay

CS Rise to SCLK Rise Hold Time
CS Pulse Width High

= +25°C. Output buffer connected in unity-gain configuration (Figure 9).)

A

CONDITIONS

CP
CH
CL

CSS
CSH

DS
DH

t

CL= 200pF

D01

t

CL= 200pF

D02

CS0
CS1

CSW

MIN

to T

MAX

, unless otherwise

UNITSMIN TYP MAXSYMBOLPARAMETER

ns100t
ns40t
ns40t
ns40t

ns0t
ns40t
ns0t

120

ns

120 ns

ns40t
ns40t
ns100t

__________________________________________Typical Operating Characteristics

(V

= +3.3V, TA = +25°C, unless otherwise noted.)

DD

INTEGRAL NONLINEARITY
vs. REFERENCE VOLTAGE

1

0

-1

-2

INL (LSB)

-3

-4
RL = 5kΩ

-5

0 0.5 1.0 1.5 2.0

REFERENCE VOLTAGE (V)

MAX5253-01

RELATIVE OUTPUT (dB)

2.5

4 _______________________________________________________________________________________

REFERENCE VOLTAGE INPUT

FREQUENCY RESPONSE

0

-4



-8

-12

-16

-20
100 560k 1.12M 1.68M 2.24M 2.8M



REFAB SWEPT 0.67Vp-p
RL = 5kΩ
CL = 100pF

FREQUENCY (Hz)

MAX5253-06

SUPPLY CURRENT

vs. TEMPERATURE

1000

950
900
850
800
750
700
650

SUPPLY CURRENT (µA)

600
550

CODE = FFF hex

500

-55 -40 -20 0 20 40 60 80 125100
TEMPERATURE (°C)



MAX5253-04

+3V, Quad, 12-Bit Voltage-Output DAC

with Serial Interface

____________________________Typical Operating Characteristics (continued)

(V

= +3.3V, TA = +25°C, unless otherwise noted.)

DD



SUPPLY CURRENT

1000

950
900
850
800
750
700
650

SUPPLY CURRENT (µA)

600
550
500

vs. SUPPLY VOLTAGE

CODE = FFF hex

2.7 2.8 3.02.9 3.1 3.2 3.3 3.4 3.6
SUPPLY VOLTAGE (V)

0

-1

-2

-3

-4

-5

-6

-7

FULL-SCALE ERROR (LSB)

-8

-9

-10

0.01 0.1 1 10 100

MAX5253-05

THD + NOISE (%)

3.5

FULL-SCALE ERROR

vs. LOAD

LOAD (kΩ)

TOTAL HARMONIC DISTORTION

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05
0

PLUS NOISE vs. LOAD

DAC CODE = ALL 1s
REFAB = 1Vp-p

= 5kΩ

R

L

= 100pF

C

L

0.1 1 10 100
FREQUENCY (kHz)

MAX5253-03

SIGNAL AMPLITUDE (dB)

-100

MAX5253-02

SIGNAL AMPLITUDE (dB)

REFERENCE FEEDTHROUGH

0

-20

-40

-60

-80

0.5 1.2 2.6

AT 1kHz

REFAB INPUT SIGNAL

OUTA FEEDTHROUGH

1.9 3.3 4.0

FREQUENCY (kHz)

0

-20

-40

-60

-80

-100

0.5 1.6 3.8

V

= 1.6Vp-p @ 1kHz

REF

= 5kΩ

R

L

= 100pF

C

L

V
R
C

FREQUENCY (kHz)

OUTPUT FFT PLOT



= 1kHz, 0.006V TO 1.6V

REF

= 5kΩ

L

= 100pF

L

2.7 4.9 6.0

MAX5253-11

MAX5253

MAX5253-10

_______________________________________________________________________________________

5