Maxim MAX5140IPG Datasheet

________________General Description

The MAX5140 is a monolithic, 8-bit digital-to-analog
converter (DAC) capable of accepting video data at
400Msps. Complete with video controls (sync, blank,
reference white (force high), and bright), the MAX5140
directly drives doubly terminated 50Ω or 75Ω loads to
standard composite video levels. Standard setup level
is 7.5IRE. The MAX5140 includes an internal precision
bandgap reference that can drive two other MAX5140s
in an RGB graphics system.

The MAX5140 is available in a 24-pin PDIP package in
the -20°C to +85°C industrial temperature range.

________________________Applications

Raster Graphics
High-Resolution Color or Monochrome Displays

to 2k x 2k Pixels
Medical Electronics: CAT, PET, and MR Imaging

Displays
CAD/CAE Workstations
Solids Modeling
General-Purpose, High-Speed Digital-to-Analog

Conversion
Digital Synthesizers
Automated Test Equipment
Digital Transmitters/Modulators

____________________________Features

♦ 400Msps Nominal Conversion Rate
♦ RS-343-A Compatible
♦ Complete Video Controls: Sync, Blank, Bright,

and Reference White (force high)

♦ ECL Compatible
♦ Single Power Supply
♦ Registered Data and Video Controls
♦ Differential Current Outputs
♦ Stable On-Chip Bandgap Reference
♦ 50Ω and 75Ω Output Drive
♦ ESD-Protected Data and Control Inputs

MAX5140

8-Bit, Ultra-High-Speed DAC

________________________________________________________________

Maxim Integrated Products

1

Sync, Blank, Bright, Ref - White

D0 - D3

D4 - D7
(MSBs)

4 To 15
Decode

Output

Current

Switches

Out +

Out -

Bandgap

Reference

Video Controls In

Video Data In

Feedthrough

Convert

Ref In

Ref Out

I

Set

Video Data In

4

4

4

4

2

4

Ref

Buffer

Register

Pin Configuration

24
23
22
21
20
19
18
17

1
2
3
4
5
6
7
8

D4
D5
D6
D7D0

D1

D2

D3

TOP VIEW

V

EE

Out+
Out­V

CC

FT

CONV

CONV

V

EE

16
15
14
13

9
10
11
12

I

Set

Ref In
Ref Out
SyncBRT

Blank

FH

V

CC

DIP

MAX5140

Functional Diagram

19-1205; Rev 2; 5/98

PART

MAX5140IPG -20°C to +85°C

TEMP. RANGE PIN-PACKAGE

24 Plastic DIP

Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.

MAX5140

8-Bit, Ultra-High-Speed DAC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= ground, VEE= -5.2V ±0.3V, CC= 0pF, I

SET

= 1.105mA, TA= T

MIN

to T

MAX

, unless otherwise noted.)

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.

Supply Voltage

V

EE

(measured to VCC)..........................................-7.0V to 0.5V

Input Voltages

CONV, Data, and Controls (measured to V

CC

)........VEEto 0.5V

Ref+ (measured to V

CC

) ..........................................VEEto 0.5V

Ref- (measured to V

CC

)............................................VEEto 0.5V

Operating Temperature Ranges

Ambient .............................................................-20°C to +85°C

Junction..........................................................................+175°C

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

Storage Temperature Range.............................-60°C to +150°C

CONDITIONS

V0.4 1.2

Convert Voltage,
Differential

V-0.5 -2.5

Convert Voltage,
Common-Mode Range

V-1.5V

IL

Input Voltage, Logic Low

V-1.0V

IH

Input Voltage, Logic High

LSB0.05 0.5I

OS

Output Offset Current

mA-45I

O-(MAX)

Maximum Current,
Negative Output

mA45I

O+(MAX)

Maximum Current,
Positive Output

pF9C

OUT

Output Capacitance

kΩ20R

OUT

Equivalent Output
Resistance

V-1.2 1.5

Compliance Voltage,
Negative Output

% Full Scale-6.5 6.5Gain Error

ppm/°C100Bandgap Tempco

pF5C

REF

Input Capacitance,
I

SET

, Ref Out

V-1.2 1.5

Compliance Voltage,
Positive Output

UNITSMIN TYP MAXSYMBOLPARAMETER

IV

IV

IV

V

VI

VI

VI

VI

VI

V
V

VI

VI

IV

TEST

LEVEL

µA35 120I

IL

Input Current, Logic Low,
Data and Controls

VI

µA40 120I

IH

Input Current, Logic High,
Data and Controls

VI

µA2 60I

CONV

Input Current, Convert VI

1.0mA < I

SET

< 1.3mA

% Full Scale -0.37 0.37

ILEIntegral Linearity Error VI

1.0mA < I

SET

< 1.3mA

% Full Scale -0.2 0.2

DLEDifferential Linearity Error VI

-0.95 0.95

-0.5 0.5

LSB

LSB

ppm/°C150Gain-Error Tempco V

MAX5140

8-Bit, Ultra-High-Speed DAC

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= ground, VEE= -5.2V ±0.3V, CC= 0pF, I

SET

= 1.105mA, TA= T

MIN

to T

MAX

, unless otherwise noted.)

AC ELECTRICAL CHARACTERISTICS

(RL= 37.5Ω, CL= 5pF, I

SET

= 1.105mA, TA= +25°C, unless otherwise noted.)

CONDITIONS

mA155 220I

EE

Supply Current

V-1.3 -1.2 -1.0V

REF

Reference Voltage
(measured to V

CC

)

pF3C

IN

Input Capacitance, Data
and Controls

µA/V-120 20 120Power-Supply Sensitivity

UNITSMIN TYP MAXSYMBOLPARAMETER

VI

VI

V

VI

TEST

LEVEL

TA= T

MIN

to T

MAX

10% to 90% G.S.

To 0.2% G.S.

TA= T

MIN

to T

MAX

CONDITIONS

Msps385 400Maximum Conversion Rate

ns

3.2 6

t

DST

Data to Output Delay,
Transparent Mode

ps

900

t

R

Rise Time

ns

4

t

SI

Current-Settling Time,
Clocked Mode

ns

2.2 4

t

DSC

Clock to Output Delay,
Clocked Mode

UNITSMIN TYP MAXSYMBOLPARAMETER

IV

III

IV

V

III

TEST

LEVEL

Area = 1/2VT pV-s4Glitch Energy V

MHz1.25-3dBReference Bandwidth V

ns1.3

t

PWH

,

t

PWL

Convert Pulse Width III

ns0.5t

H

Hold Time, Data and
Controls

III

ns1.0t

S

Setup Time, Data and
Controls

III

dB-48Clock Feedthrough III

20% to 80% G.S. V/µs700Slew Rate V

µA-50I

REF

Reference Output Current VI

600

IV

IV

4.5

6

TEST-LEVEL CODES

All electrical characteristics are subject to
the following conditions:

All parameters having min/max specifica­tions are guaranteed. The Test Level column
indicates the specific device testing actually
performed during production and Quality
Assurance inspection. Any blank section in
the data column indicates that the specifica­tion is not tested at the specified condition.

Unless otherwise noted, all tests are pulsed
tests; therefore, T

j

= TC= TA.

TEST LEVEL

I

II

III
IV

V

VI

TEST PROCEDURE

100% production tested at the specified temperature.
100% production tested at T

A

= +25°C, and sample-

tested at the specified temperatures.
QA sample tested at only the specified temperatures.
Parameter is guaranteed (but not tested) by design

and characterization data.
Parameter is a typical value for reference.
100% production tested at T

A

= +25°C. Parameter is

guaranteed over specified temperature range.

RL= 25Ω

RL= 25Ω 3

MAX5140

8-Bit, Ultra-High-Speed DAC

4 _______________________________________________________________________________________

______________________________________________________________Pin Description

Detailed Description

The MAX5140 is an ultra-high-speed video digital-to­analog converter (DAC) capable of up to 400Msps con­version rates. This high speed makes the device
suitable for driving 2048 x 2048 pixel displays at 60Hz
to 90Hz update rates.

In addition, the MAX5140 includes an internal bandgap
reference, which may be used to drive two other
MAX5140s, if desired.

The MAX5140 has ECL logic-level-compatible video
control and data inputs. The complementary analog
output currents produced by the devices are propor­tional to the product of the digital control and data
inputs in conjunction with the analog reference current.
The MAX5140 is segmented so that the input data’s
four MSBs are separated into a parallel thermometer
code. From here, fifteen identical current sinks are driv­en to fabricate sixteen coarse output levels. The
remaining four LSBs drive four binary-weighted current
switches.

MSB currents are then summed with the LSBs that con­tribute one-sixteenth of full-scale to provide the 256 dis­tinct analog output levels.

The video-control inputs drive weighted current sinks,
which are added to the output current to produce com­posite video-output levels. These controls (sync, blank,
reference white (force high), and bright) are required in
video applications.

A feature that similar video DACs do not have is feed­through control. The feedthrough pin (FT) allows regis­tered or unregistered operation of the video control and
data inputs. In registered mode, the composite func­tions are latched to the pixel data to prevent screen­edge distortions (generally found on unregistered video
DACs).

PIN

Data Bits 3, 2, and 1D3, D2, D11, 2, 3

FUNCTIONNAME

Data Bit 0 (LSB)D04

Convert Clock InputCONV6

Negative SupplyV

EE

5, 20

Register Feedthrough ControlFT8

Data Force-High ControlFH10

Positive SupplyV

CC

9, 17

Convert-Clock-Input Complement

CONV

7

Video Bright InputBRT12

Reference OutputRef Out14

Video Sync InputSync13

Reference CurrentI

Set

16

Output Current NegativeOut-18

Reference InputRef In15

Video Blank InputBlank11

Data Bits 6, 5, and 4D6, D5, D422, 23, 24

Data Bit 7 (MSB)D721

Output Current PositiveOut+19