Rainbow Electronics MAX500 User Manual

19-1016; Rev 2; 2/96

CMOS, Quad, Serial-Interface

8-Bit DAC

_______________General Description

The MAX500 is a quad, 8-bit, voltage-output digital-to­analog converter (DAC) with a cascadable serial inter­face. The IC includes four output buffer amplifiers and
input logic for an easy-to-use, two- or three-wire serial
interface. In a system with several MAX500s, only one
serial data line is required to load all the DACs by cas­cading them. The MAX500 contains double-buffered
logic and a 10-bit shift register that allows all four DACs
to be updated simultaneously using one control signal.
There are three reference inputs so the range of two of
the DACs can be independently set while the other two
DACs track each other.

The MAX500 achieves 8-bit performance over the full
operating temperature range without external trimming.

________________________Applications

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

________________Functional Diagram

V

C

REF

V

A/B

V

DAC A

REF

D

V

A

OUT

REF

SRO

AGND

DGND V

INPUT
REG A

V

LDAC

DD

SS

DAC

REG A

____________________________Features

♦ Buffered Voltage Outputs
♦ Double-Buffered Digital Inputs
♦ Microprocessor and TTL/CMOS Compatible
♦ Requires No External Adjustments
♦ Two- or Three-Wire Cascadable Serial Interface
♦ 16-Pin DIP/SO Package and 20-Pin LCC
♦ Operates from Single or Dual Supplies

______________Ordering Information

PART

MAX500ACPE
MAX500BCPE

MAX500ACWE
MAX500BCWE
MAX500BC/D 0°C to +70°C Dice*
MAX500AEPE -40°C to +85°C 16 Plastic DIP
MAX500BEPE -40°C to +85°C 16 Plastic DIP
MAX500AEWE
MAX500BEWE
MAX500AEJE -40°C to +85°C 16 CERDIP
MAX500BEJE -40°C to +85°C 16 CERDIP
MAX500AMJE
MAX500BMJE
MAX500AMLP
MAX500BMLP

*Contact factory for dice specifications.

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C
0°C to +70°C

16 Plastic DIP
16 Plastic DIP
16 Wide SO

0°C to +70°C 16 Wide SO

-40°C to +85°C 16 Wide SO

-40°C to +85°C 16 Wide SO

-55°C to +125°C 16 CERDIP

-55°C to +125°C 16 CERDIP

-55°C to +125°C 20 LCC

-55°C to +125°C 20 LCC

ERROR (LSB)

±1
±2
±1
±2
±2
±1
±2
±1
±2
±1
±2
±1
±2
±1
±2

_________________Pin Configurations

MAX500

V

10/11-

SHIFT

REGISTER

CONTROL

LOGIC

LOAD

BIT

SCL

SDA

B

INPUT
REG B

DATA BUS

INPUT
REG C

INPUT
REG D

DAC

REG B

DAC

REG C

DAC

REG D

DAC B

DAC C

DAC D

OUT

V

C

OUT

V

D

OUT

MAX500

________________________________________________________________

TOP VIEW

B

V

V

OUT

V

OUT

REF

AGND
DGND

LDAC

V
A/B

SDA

1

A

2

SS

3

MAX500

4
5
6
7
8

16
15
14
13
12
11
10

V
V
V
VREFC
V
SRO
SCL

LOAD

9

DIP/SO

Pin Configurations continued on last page.

Maxim Integrated Products

OUTC

OUT
DD

REF

D

D

1

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

CMOS, Quad, Serial-Interface
8-Bit DAC

ABSOLUTE MAXIMUM RATINGS

Power Requirements

to AGND...........................................................-0.3V, +17V

V

DD

to DGND ..........................................................-0.3V, +17V

V

DD

to DGND..................................................-7V, (VDD+ 0.3V)

V

SS

to VSS...............................................................-0.3V, +24V

V

DD

Digital Input Voltage to DGND ....................-0.3V, (V

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

V

REF

MAX500

to AGND (Note 1)...............................-0.3V, (VDD+ 0.3V)

V

OUT

Power Dissipation (T

Plastic DIP (derate 10.53mW/°C above +70°C)............842mW

= +70°C)

A

DD

+ 0.3V)

Wide SO (derate 9.52mW/°C above +70°C)................762mW

CERDIP (derate 10.00mW/°C above +70°C)...............800mW

LCC (derate 9.09mW/°C above +70°C).......................727mW

Operating Temperature Ranges

MAX500_C_ _ ....................................................0°C to + 70°C

MAX500_E_ _...................................................-40°C to +85°C

MAX500_M_ _................................................-55°C to +125°C

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

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

Note 1: The outputs may be shorted to AGND, provided that the power dissipation of the package is not exceeded.

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.

Typical short-circuit current to AGND is 25mA

ELECTRICAL CHARACTERISTICS—Dual Supplies

(VDD= +11.4V to +16.5V, VSS= -5V ±10%, AGND = DGND = 0V, V

STATIC PERFORMANCE

Total Unadjusted Error

Relative Accuracy

Full-Scale Error

Zero-Code Error

REFERENCE INPUT

Reference Input Resistance

AC Feedthrough TA= +25°C (Notes 2, 3) -70 dB

DIGITAL INPUTS

Digital Input High Voltage V
Digital Input Low Voltage V
Digital Output High Voltage V
Digital Output Low Voltage V

Digital Input Capacitance TA= +25°C (Note 2) 8 pF

VDD= 15V ±5%,
V

= 10V

REF

MAX500A
MAX500B
Guaranteed monotonic
MAX500A
MAX500B
V

= 10V

REF

TA= +25°C

TA= T

V

REF

V

REF

TA= +25°C, code dependent (Note 2)
T

A

IH
IL

I

OH
OL

OUT

I

OUT

(Note 4)Digital Input Leakage Current

to T

MIN

MAX

C, V

D

REF

A/B

= +25°C (Notes 2, 3)

= -1mA, SRO only VDD- 1 V
= 1mA, SRO only 0.4 V

= +2V to (VDD- 4V), TA= T

REF

CONDITIONS

MAX500A
MAX500B

MAX500A
MAX500B
MAX500A
MAX500B

Excluding LOAD
LOAD = 0V

to T

MIN

11

5.5

2.4 5.5

, unless otherwise noted.)

MAX

UNITSMIN TYP MAXSYMBOLPARAMETER

±1
±2

±1/2

±1

±1/2

±1

ppm/°C±5Full-Scale Tempco
±15
±20
±20
±30

- 4Reference Input Range

DD

0.8 V

±1
30

Bits8Resolution

LSB

LSB
LSB±1Differential Nonlinearity
LSB

mV

µV/°C±30Zero-Code Tempco

V2V
kΩ
pF100Reference Input Capacitance

dB-60Channel-to-Channel Isolation

V

µA

2 _______________________________________________________________________________________

CMOS, Quad, Serial-Interface

8-Bit DAC

ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)

(VDD= +11.4V to +16.5V, VSS= -5V ±10%, AGND = DGND = 0V, V

DYNAMIC PERFORMANCE

TA = +25°C (Note 2)

Settling Time

OUT

To ±1/2LSB, V
2kΩ in parallel with 100pF load (Note 2)

REF

(Note 5)
(Note 5)
V

= 10V

OUT

Positive Supply Voltage

POWER SUPPLIES

Positive Supply Voltage

Positive Supply Current

Negative Supply Current

I

DD

I

For specified performance

DD

For specified performance V11.4 16.5V

DD

Outputs unloaded

Outputs unloaded

SS

SWITCHING CHARACTERISTICS (TA= +25°C, Note 6)
3-Wire Mode

SDA Valid to SCL Setup
SDA Valid to SCL Setup
SDA Valid to SCL Hold
SCL High Time
SCL Low Time

S1
S1

H

1
2

(Note 7) µs50SCL Rise Time
(Note 7) µs50SCL Fall Time

LOAD Pulse Width
LOAD Delay from SCL
LDAC Pulse Width

SRO Output Delay t

2-Wire Mode

SCL High Time t
SDA Valid to SCL Hold t
SCL High Time t
SCL Low Time t

LDW

LDS

t

LDAC

D1

H

C

= 50pF 150 ns

LOAD

1

1
2

SCL Rise Time (Note 7) 50 µs
SCL Fall Time (Note 7) 50 µs
LDAC Pulse Width
SCL Valid to SDA Setup t
SDA Valid to SCL Setup t
SDA Valid to Rising SCL t
SRO Output Delay t

t

LDAC

S1
S2
S3
D1

Start condition 150 ns
Stop condition 100 ns

C

= 50pF 150 ns

LOAD

= +2V to (VDD- 4V), TA= T

REF

CONDITIONS

= 10V, VDD= +15V,

TA= +25°C
TA= T

MIN

TA= +25°C
TA= T

MIN

to T

to T

MAX

MAX

to T

MIN

, unless otherwise noted.)

MAX

38Voltage Output Slew Rate

10
12

-9

-10

150 ns

350 ns

0 ns
350 ns
350 ns

150 ns

125 ns

MAX500

UNITSMIN TYP MAXSYMBOLPARAMETER

V/µs

µs2.5 4.5V

nV-s50Digital Feedthrough
nV-s50Digital Crosstalk

kΩ2Output Load Resistance

V11.4 16.5V

mA

mA

ns150t
ns150t
ns0t
ns350t
ns350t

ns150t
ns150t

_______________________________________________________________________________________ 3

CMOS, Quad, Serial-Interface





8-Bit DAC

ELECTRICAL CHARACTERISTICS—Single Supply

(VDD= +15V ±5%, VSS= AGND = DGND = 0V, V

STATIC PERFORMANCE

Total Unadjusted Error

MAX500

Relative Accuracy

Full-Scale Error

Zero-Code Error

REFERENCE INPUT—All specifications are the same as for dual supplies.
DIGITAL INPUTS—All specifications are the same as for dual supplies.
DYNAMIC PERFORMANCE—All specifications are the same as for dual supplies.
POWER SUPPLIES

Positive Supply Voltage
Positive Supply Current

SWITCHING CHARACTERISTICS—All specifications are the same as for dual supplies.

Note 2: Guaranteed by design. Not production tested.
Note 3: T

= +25°C, V

A

= 10kHz, 10V peak-to-peak sine wave.

REF

Note 4: LOAD has a weak internal pull-up resistor to V
Note 5: DAC switched from all 1s to all 0s, and all 0s to all 1s code.
Note 6: Sample tested at +25°C to ensure compliance.
Note 7: Slow rise and fall times are allowed on the digital inputs to facilitate the use of opto-couplers. Only timing for SCL is given

because the other digital inputs should be stable when SCL transitions.

I

DD

DD

= 10V, TA= T

REF

MIN

to T

CONDITIONS

VDD= 15V ±5%,
V

= 10V

REF

Guaranteed monotonic

V

= 10V ppm/°C±5Full-Scale Tempco

REF

TA= +25°C

TA= T

MIN

to T

MAX

For specified performance
Outputs unloaded

.

DD

, unless otherwise noted.)

MAX

MAX500A
MAX500B
MAX500A
MAX500B

MAX500A
MAX500B

MAX500A
MAX500B
MAX500A
MAX500B

TA= +25°C
TA= T

MIN

to T

MAX

±1
±2

±1/2

±1

±1/2

±1

±15
±20
±20
±30

10
12

UNITSMIN TYP MAXSYMBOLPARAMETER

Bits8Resolution

LSB

LSB
LSB±1Differential Nonlinearity
LSB

mV

µV/°C±30Zero-Code Tempco

V14.25 15.75V

mA

__________________________________________Typical Operating Characteristics

RELATIVE ACCURACY vs. REFERENCE VOLTAGE

1.0

0.5



-0.5

RELATIVE ACCURACY (LSB)

-1.0
0

2

TA = +25°C, VSS = -5V

VDD = 15V

VDD = 12V

406 8 10 12 14

(V)

V

REF

MAX500-04

DIFFERENTIAL NONLINEARITY vs. REFERENCE VOLTAGE

1.0

0.5



0

-0.5

DIFFERENTIAL NONLINEARITY (LSB)

-1.0

TA = +25°C, VSS = -5V

20





VDD = 12V

VDD = 15V

6 8 10 12 14

4

V

(V)

REF

MAX500-05

4 _______________________________________________________________________________________