Rainbow Electronics MAX547 User Manual

19-0257; Rev 3; 12/95

Octal, 13-Bit Voltage-Output DAC

with Parallel Interface

_________________General Description

The MAX547 contains eight 13-bit, voltage-output digital-to­analog converters (DACs). On-chip precision output ampli­fiers provide the voltage outputs. The MAX547 operates
from a ±5V supply. Bipolar output voltages with up to ±4.5V
voltage swing can be achieved with no external compo­nents. The MAX547 has four separate reference inputs;
each is connected to two DACs, providing different full­scale output voltages for every DAC pair.

The MAX547 features double-buffered interface logic with a
13-bit parallel data bus. Each DAC has an input latch and a
DAC latch. Data in the DAC latch sets the output voltage. The
eight input latches are addressed with three address lines.
Data is loaded to the input latch with a single write instruction.
An asynchronous load (–L—D—_–) input transfers data from the
input latch to the DAC latch. The four –L—D—_–inputs each control
two DACs, and all DAC latches can be updated simultane­ously by asserting all –L—D—_–pins. An asynchronous clear (–C—L—R–)
input resets the output of all eight DACs to AGND_. Asserting

–C—L—R–

resets both the DAC and the input latch to bipolar zero
(1000hex). On power-up, reset circuitry performs the same
function as –C—L—R–. All logic inputs are TTL/CMOS compatible.

The MAX547 is available in 44-pin plastic quad flat pack
and 44-pin PLCC packages.

________________________Applications

Automatic Test Equipment
Minimum Component-Count Analog Systems
Digital Offset/Gain Adjustment
Arbitrary Function Generators
Industrial Process Controls
Avionics Equipment

_____________________________Features

♦ Full 13-Bit Performance without Adjustments
♦ 8 DACs in One Package
♦ Buffered Voltage Outputs
♦ Calibrated Linearity
♦ Guaranteed Monotonic to 13 Bits
♦ ±5V Supply Operation
♦ Unipolar or Bipolar Outputs Swing to ±4.5V

1

♦ Fast Output Settling (5µs to ±

⁄2LSB)

♦ Double-Buffered Digital Inputs
♦ Asynchronous Load Inputs Load Pairs of DAC Latches
♦ Asynchronous

–C—L—R–

Input Resets DACs to Analog

Ground

♦ Power-On Reset Circuit Resets DACs to Analog Ground
♦ Microprocessor and TTL/CMOS Compatible

________________Ordering Information

PART TEMP. RANGE

MAX547ACQH
MAX547BCQH

0°C to +70°C 44 PLCC
0°C to +70°C

MAX547ACMH 0°C to +70°C

PIN-PACKAGE

44 PLCC

44 Plastic FP
MAX547BCMH 0°C to +70°C 44 Plastic FP
MAX547BC/D 0°C to +70°C Dice*

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

INL

(LSBs)

±2
±4
±2
±4
±4

_______________________________________________________________Pin Configurations

MAX547

TOP VIEW

VOUTB
VOUTA

REFAB

AGNDAB

LDAB

LDCD

SS

VOUTD

V

VOUTC

42

43

44

1
2
3

V

DD

4
5
6
7
8

CS

9

WR

10

A2

11

A1

14

13

12

D12

D11D7D10

REFCD

AGNDCD

40

41

MAX547

16

15

D9

AGNDEF

CLR

38

39

18

17

D8A0D6

REFEF

VSSVOUTF

36

37

20

19

D5D3D4

VOUTE

35

21

34

VOUTG

33
32

VOUTH

31

V

DD

30

REFGH

29

AGNDGH

28

GND

27

LDGH

26

LDEF

25

D0

24

D1

23

D2

22

VOUTB
VOUTA

V

REFAB

AGNDAB

LDAB

LDCD

WR

7
8
9

DD

10
11
12
13
14

CS

15

A2

16

A1

17

PLASTIC FP

________________________________________________________________

VOUTC

6

18

A0

SS

VOUTD

V

5

20

D11

D12D9D10

21

REFCD

MAX547

22 2319

PLCC

AGNDCD

AGNDEF

REFEF

VSSVOUTE

CLR

43

441234404142

25

24

D7D8D5D6D3

VOUTF

39
38
37
36
35
34
33
32
31
30
29

26

27

28

D4

Maxim Integrated Products

VOUTG
VOUTH
V

DD

REFGH
AGNDGH
GND
LDGH
LDEF
D0
D1
D2

1

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

Octal, 13-Bit Voltage-Output
DAC with Parallel Interface

ABSOLUTE MAXIMUM RATINGS

VDDto GND..............................................................-0.3V to +6V

to GND...............................................................-6V to +0.3V

V

SS

Digital Input Voltage to GND......................-0.3V to (V

REF_ ..........................................(AGND_ - 0.3V) to (V

AGND_ .............................................(V

VOUT_ ........................................................................V

Maximum Current into REF_ Pin.......................................±10mA

MAX547

Maximum Current into Any Other Signal Pin....................±50mA

- 0.3V) to (VDD+ 0.3V)

SS

DD
DD

+ 0.3V)
+ 0.3V)

to V

DD

SS

Continuous Power Dissipation (T

PLCC (derate 13.33mW/°C above +70°C)...................1067mW

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

Operating Temperature Ranges

MAX547–C–H.........................................................0°C to +70°C

MAX547–E–H......................................................-40°C to +85°C

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

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

ELECTRICAL CHARACTERISTICS

(VDD= +5V, VSS= -5V, REF_ = 4.096V, AGND_ = GND = 0V, RL= 10kΩ, CL= 50pF, TA= T
Typical values are at T

STATIC PERFORMANCE—ANALOG SECTION

REFERENCE INPUT (Note 2)

ANALOG OUTPUT

Maximum Output Voltage
Minimum Output Voltage

DYNAMIC PERFORMANCE—ANALOG SECTION

DIGITAL INPUTS (VDD= 5V ±5%)

Input Voltage High
Input Voltage Low
Input Current
Input Capacitance

= +25°C.)

A

CONDITIONS

INLRelative Accuracy

PSRRPower-Supply Rejection Ratio

REFReference Input Range

IN

MAX547A
MAX547B
Guaranteed monotonic

∆Gain/∆V
∆Gain/∆V

(Notes 2, 3)
Each REF– pin (Note 3)

1

±

To

⁄2LSB of full scale (Note 4)

IH
IL

VIN= 0V or V
(Note 5)

IN

DD
SS

(Note 1)

(Note 1)

AGND

DD

MIN

A

to T

–

= +70°C)

MAX

VDD- 0.5
VSS+ 0.5

, unless otherwise noted.

UNITSMIN TYP MAXSYMBOLPARAMETER

±0.5 ±2
±0.5 ±4

±1 ±8

±0.0025
±0.0025

V

DD

LSB

LSB±1DNLDifferential Nonlinearity
LSBBipolar Zero-Code Error ±5 ±20
LSBGain Error

%/%

LSB0.3Load Regulation RL = ∞ to 10kΩ

V/µs3Voltage-Output Slew Rate

nV-s5Digital Feedthrough
nV-s5Digital Crosstalk

Bits13NResolution

V

kΩ5RREFReference Input Resistance

V
V

µs5Output Settling Time

V2.4V

V0.8V
µA1.0I
pF10C

2 _______________________________________________________________________________________

Octal, 13-Bit Voltage-Output

DAC with Parallel Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V, VSS= -5V, REF_ = 4.096V, AGND_ = GND = 0V, RL= 10kΩ, CL= 50pF, TA= T
Typical values are at T

POWER SUPPLIES

Positive Supply Range
Negative Supply Range
Positive Supply Current
Negative Supply Current

Note 1: PSRR is tested by changing the respective supply voltage by ±5%.
Note 2: For best performance, REF_ should be greater than AGND_ + 2V and less than V

reference inputs outside this range, but performance may degrade. For further information on the reference, see the

Reference and Analog-Ground Inputs

Note 3: Reference input resistance is code dependent. See

Description

Note 4: Typical settling time with 1000pF capacitive load is 10µs.
Note 5: Guaranteed by design. Not production tested.
Note 6: Guaranteed by supply-rejection test.

= +25°C.)

A

.

MIN
MIN

to T
to T

CONDITIONS

MAX
MAX

Detailed Description

MIN TYP MAX

- 0.6V. The device operates with

DD

.

SYMBOLPARAMETER

(Note 6)

DD

(Note 6)

SS
DD
SS

TA= T

section in the

Reference and Analog-Ground Inputs

to T

MIN

MAX

14 44
11 40TA= T

section in the

MAX547

, unless otherwise noted.

UNITS

V4.75 5.25V

V-5.25 -4.75V
mAI
mAI

Detailed

TIMING CHARACTERISTICS

(VDD= +5V, VSS= -5V, REF_ = 4.096V, AGND_ = GND = 0V, TA= T

CONDITIONS

–C—S–

Pulse Width Low

–W—R–

Pulse Width Low

–L—D—––

Pulse Width Low

–C—L—R–

Pulse Width Low

–C—S–

Low to–W—R– Low

–C—S–

High to–W—R– High
Data Valid to –W—R–Setup
Data Valid to –W—R–Hold
Address Valid to –W—R–Setup
Address Valid to –W—R–Hold

t

1

t

2

t

3

t

4

t

5

t

6

t

7

t

8

t

9

t

10

MIN

to T

, unless otherwise noted.)

MAX

50
50
50

100

0
0

50

0

10

0

UNITSMIN TYP MAXSYMBOLPARAMETER

ns
ns
ns
ns
ns
ns
ns
ns
ns
ns

_______________________________________________________________________________________ 3

Octal, 13-Bit Voltage-Output
DAC with Parallel Interface

__________________________________________Typical Operating Characteristics

(VDD= 5V, VSS= -5V, REF_ = 4.096V, AGND_ = GND = 0V, TA= +25°C, unless otherwise noted.)

RELATIVE ACCURACY

0.5

0.4

MAX547

0.3

0.2

0.1
0

-0.1

-0.2

RELATIVE ACCURACY (LSB)

-0.3

-0.4

-0.5

vs. DIGITAL INPUT CODE

0

2048

1024

DIGITAL INPUT CODE (DECIMAL)

TOTAL HARMONIC DISTORTION

+ NOISE AT DAC OUTPUT

0.100

0.090

0.080

0.070

0.060

0.050

0.040

THD + NOISE (%)

0.030

0.020

0.010

vs. REFERENCE FREQUENCY

REF– = 2V
INPUT CODE = ALL 1s

0

1 10 100 1000

3072

4096

p-p

FREQUENCY (kHz)

5120

6144

7168

3

MAX547-Fg TOC-5

2

1

0

RELATIVE ACCURACY (LSB)

-1

-2

8191

MAX547-Fg TOC-4

01234

0.100

0.090

0.080

0.070

0.060

0.050

0.040

THD + NOISE (%)

0.030

0.020

0.010
0

1 10 100 1000

RELATIVE ACCURACY vs.

REFERENCE VOLTAGE

REFERENCE VOLTAGE (V)

TOTAL HARMONIC DISTORTION

+ NOISE AT DAC OUTPUT

vs. REFERENCE FREQUENCY

REF– = 4V

p-p

INPUT CODE = ALL 1s

FREQUENCY (kHz)

20
15

MAX547-Fg TOC-11

10

SUPPLY CURRENT (mA)

-10

-15

5

-20

1000

MAX547-Fg TOC-3

100

SETTLING TIME (µs)

SUPPLY CURRENT

vs. TEMPERATURE

I

DD

5
0

-5

-60 -40 -20 0 20 40 60 80 100 120 140

I

SS

TEMPERATURE (°C)

SETTLING TIME

vs. LOAD CAPACITANCE

10

1

0.01 0.1 1 10 100
LOAD CAPACITANCE (nF)

MAX547-Fg TOC-2

MAX547-Fg TOC-9

REFERENCE INPUT SMALL-SIGNAL

FREQUENCY RESPONSE

6
0

SINE WAVE AT REF

-6

2V ±100mV
CODE ALL 1s

-12

-18

-24

RELATIVE OUTPUT (dB)

-30

-36

0.1 1 10 100 1000 10,000

–

FREQUENCY (kHz)

MAX547-Fg TOC-1

REFERENCE INPUT LARGE-SIGNAL

2
0

-2

-6

-10

-14

RELATIVE OUTPUT (dB)

-18

-22

FREQUENCY RESPONSE

SINE WAVE AT REF_
2V ±2V
CODE ALL 1s

0.1 1 10 100 1000 10,000
FREQUENCY (kHz)



0

-10

MAX547-Fg TOC-6

-20

-30

-40

-50

-60

RELATIVE OUTPUT (dB)

-70

-80

-90

0.1 1 10 100 1000

REFERENCE FEEDTHROUGH

SINE WAVE AT REF_
2V ±2V


FREQUENCY (kHz)

4 _______________________________________________________________________________________

MAX547-Fg TOC-7



Octal, 13-Bit Voltage-Output

DAC with Parallel Interface

____________________________Typical Operating Characteristics (continued)

(VDD= 5V, VSS= -5V, REF_ = 4.096V, AGND_ = GND = 0V, TA= +25°C, unless otherwise noted.)

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

0

-10

VDD = VSS = 5V ±200mV
NO LOAD

-20

-30

-40

PSRR (dB)

-50

-60

-70

-80

0.01 0.1 1 10 100 1000
FREQUENCY (kHz)

V

SS

V

POSITIVE SETTLING TIME TO FULL-SCALE STEP

(ALL BITS OFF TO ALL BITS ON)

2.0

MAX547-Fg TOC-10

DD

1.5

1.0

0.5
0

ERROR (LSB)

-0.5

-1.0

-1.5

-2.0
110

NEGATIVE SETTLING TIME TO FULL-SCALE STEP

DIGITAL
INPUTS
(5V/div)



FULL-SCALE ERROR

vs. LOAD RESISTANCE

NEGATIVE
FULL-SCALE

REF_ = 4.096V

POSITIVE
FULL-SCALE

100

LOAD RESISTANCE (kΩ)

(ALL BITS ON TO ALL BITS OFF)

1000

MAX547-Fg TOC-8

DIGITAL
INPUTS
(5V/div)



MAX547

REF– = 4.096V, C

(ALL BITS OFF, ON, OFF)

REF– = 4.096V, C

_______________________________________________________________________________________

2µs/div

= 100pF, RL = 5kΩ

L

DYNAMIC RESPONSE

2µs/div

= 100pF, RL = 5kΩ

L

OUTPUT
(1mV/div)

DIGITAL
INPUTS
(5V/div)



OUTPUT
(2V/div)

REF– = 4.096V, C

2µs/div

= 100pF, RL = 5kΩ

L

DIGITAL FEEDTHROUGH

(GLITCH IMPULSE)

+5V

0V

10mV

0V

-10mV

200ns/div

TOP: DIGITAL TRANSITION ON ALL DATA BITS
BOTTOM: DAC OUTPUT WITH WR HIGH 10mV/div

OUTPUT
(1mV/div)



5