MAXIM MAX5012 User Manual

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_______________General Description

The MAX5012 is a 12-bit, 100Msps digital-to-analog
converter (DAC) designed for digital modulation, direct
digital synthesis, high-resolution imaging, and arbitrary­waveform-generation applications. This device is pin­for-pin compatible with the AD9712 with significantly
improved settling time and glitch-energy performance.

The MAX5012 is an ECL-compatible device. It features
a fast 13ns settling time and low 15pV-s glitch impulse
energy, which results in excellent spurious-free dynamic
range characteristics.

The MAX5012 is available in a 28-pin plastic DIP or
PLCC package in the -40°C to +85°C extended-industrial
temperature range.

________________________Applications

Fast-Frequency-Hopping Spread-Spectrum
Radios

Direct-Sequence Spread-Spectrum Radios
Digital RF/IF Modulation
Microwave and Satellite Modems
Test and Measurement Instrumentation

____________________________Features

♦ 12-Bit, 100Msps DAC
♦ ECL-Compatible Inputs
♦ Low Power: 600mW
♦ 1/2LSB DNL
♦ 40MHz Multiplying Bandwidth
♦ Extended-Industrial Temperature Range
♦ Superior Performance over AD9712:

Improved Settling Time: 13ns
Improved Glitch Energy: 15pV-s
Master/Slave Latches

MAX5012

12-Bit, 100Msps ECL DAC

________________________________________________________________

Maxim Integrated Products

1

_________________________________________________________Functional Diagram

19-1271; Rev 0; 8/97

PART

MAX5012AEPI
MAX5012BEPI -40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

28 Plastic DIP
28 Plastic DIP

______________Ordering Information

Pin Configurations appear at end of data sheet.

MAX5012BEQI -40°C to +85°C 28 PLCC

MAX5012

MAX5012AEQI -40°C to +85°C 28 PLCC

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

dBc

MAX5012

12-Bit, 100Msps ECL DAC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VEE= -5.2V, R

SET

= 7.5kΩ, CONTROL AMP IN = REF OUT, V

OUT

= 0V, TA= T

MIN

- 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 Voltages

Negative Supply Voltage (V

EE

).............................................-7V

A/D Ground Voltage Differential..........................................0.5V

Input Voltages

Digital Input Voltage (D1–D12, Latch Enable)............0V to V

EE

Control Amp Input Voltage Range...............................0V to -4V

Reference Input Voltage Range (V

REF

) ..................-3.7V to V

EE

Output Currents

Internal-Reference Output Current .................................500µA

Control-Amplifier Output Current..................................±2.5mA

Continuous Power Dissipation

Plastic DIP (derate 14.29mW/°C above +70°C) .............1.14W

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

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

Junction Temperature......................................................+150°C

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

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

Full temperature

VI

V

V

I

V

V

IV

IV V

V

-1.2 2.0

V

VI

I

VI

V

TA= +25°C

I

I

TEST

LEVEL

VI 5.0 5.0

dBc

701.23MHz; 10Msps

TA= +25°C

Spurious-Free Dynamic Range

mA20.48TA= +25°C

Full-Scale Output Current
(Note 5)

pV-s15TA= +25°CGlitch Energy (Note 4)

ns1TA= +25°C

Output Propagation Delay (tD)
(Note 3)

ns13TA= +25°CSettling Time (tST) (Note 2)

Msps100TA= +25°CConversion Rate

Dynamic Performance

µA/°C0.01Full temperatureOffset Drift Coefficient

Output Compliance Voltage -1.2 2.0

TA= +25°C

IV kΩ0.8 1.0 1.2TA= +25°CEquivalent Output Resistance

0.5 2.5

0.8 1.0 1.2

LSB

±1.5

Max at full
temperature

Differential Nonlinearity

±0.5 ±0.75

DC Performance

µA

ppm/°C150Full temperatureGain-Error Tempco

% F.S.

8.0Full temperature

±0.75 ±1.0Best fit

LSB

±1.75

Max at full
temperature

Integral Nonlinearity

pF10TA= +25°COutput Capacitance

1.0 5.0TA= +25°C

UNITS

MAX5012A

MIN TYP MAX

CONDITIONSPARAMETER

70

20.48

15

1

13

100

0.01

0.5 2.5

±2.0

±1.0 ±1.25

150

8.0

±1.0 ±1.5

±2.0

10

1.0 5.0

MAX5012B

MIN TYP MAX

Bits12Resolution 12

V

6810MHz span16MHz; 40Msps

68

2MHz span

10.1MHz; 50Msps

685.055MHz; 20Msps

68

68

68

V ns2RL= 50ΩRise/Fall Time 2

Gain Error (Note 1)

Zero-Scale Offset Error

DC PERFORMANCE

DYNAMIC PERFORMANCE

mA

MAX5012

12-Bit, 100Msps ECL DAC

_______________________________________________________________________________________ 3

Note 1: Gain is measured as a ratio of the full-scale current to I

SET

. The ratio is nominally 128.

Note 2: Measured as voltage at mid-scale transition to ±0.024%; R

L

= 50Ω.

Note 3: Measured from the rising edge of Latch Enable to where the output signal has left a 1LSB error band.
Note 4: Glitch is measured as the largest single transient.

Note 5: Calculated using

I = 128 x

Control Amp In

R

FS

SET











IV

IV

VI

IV

V

I

VI

VI

VI

VI

V MHz

V

1

V

V

V

I

TA= +25°C

VI

TEST

LEVEL

V 50 50Internal Reference Voltage Drift

ns0.5 0TA= +25°C

Input Hold Time (tH)

ns3.5Full temperature

ns3 2TA= +25°C

Input Setup Time (tS)

pF3TA= +25°CInput Capacitance

µA10Full temperatureLogic 0 Current

µA20Full temperatureLogic 1 Current

V-1.7 -1.5Full temperatureLogic 0 Voltage

V-1.0 -0.8Full temperatureLogic 1 Voltage

MΩ3TA= +25°CAmplifier Input Impedance

Amplifier Input Bandwidth 1

V-1.15 -1.20 -1.25Internal Reference Voltage

mA

148Full temperature

115 140TA= +25°C

Negative Supply Current (-5.2V)

ppm/°C

MHz40TA= +25°C

Reference Multiplying
Bandwidth

kΩ3TA= +25°CReference Input Impedance

mW600Nominal Power Dissipation

µA/V30 100

±5% of VEE,
external reference,
TA= +25°C

Power-Supply Rejection Ratio

UNITS

MAX5012A

MIN TYP MAX

CONDITIONSPARAMETERS

IV

0.5 0

3.5

3 2

3

10

20

-1.7 -1.5

-1.0 -0.8

3

IV

-1.15 -1.20 -1.25

148

115 140

40

3

600

30 100

MAX5012B

MIN TYP MAX

IV V-5.46 -5.2 -4.94Negative Supply Voltage -5.46 -5.2 -4.94

ns5.0 4.0TA= +25°C

Latch Pulse Width

(t

PWL

, t

PWH

)

ns0.5Full temperature

5.0 4.0

0.5

ELECTRICAL CHARACTERISTICS (continued)

(VEE= -5.2V, R

SET

= 7.5kΩ, CONTROL AMP IN = REF OUT, V

OUT

= 0V, TA= T

MIN

- T

MAX

, unless otherwise noted.)

TEST LEVEL CODES TEST LEVEL TEST PROCEDURE

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 black section in
the data column indicates that the specification is not
tested at the specified condition.

I

II

III
IV

V

VI

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

characterization data.
Parameter is a typical value for information purposes only.
100% production tested at T

A

= +25°C. Parameter is

guaranteed over specified temperature range.

POWER-SUPPLY REQUIREMENTS

VOLTAGE INPUT AND CONTROL

DIGITAL INPUTS

MAX5012

12-Bit, 100Msps ECL DAC

4 _______________________________________________________________________________________

NAME FUNCTION

1–10 D2–D11 Digital Input Bits 2–11

PIN

13 Analog Return Analog Return Ground

12, 21 Digital V

EE

Digital Negative Supply (-5.2V)

11 D12 (LSB) Digital Input Bit 12 (LSB)

______________________________________________________________Pin Description

14 I

OUT

Analog Current Output

15, 25 Analog V

EE

Analog Negative Supply (-5.2V)

16

I

_
OUT

Complementary Analog Current Output

17 Ref In Voltage Reference Input

20 Ref Out Internal Voltage Reference Output. Ref Out is normally connected to Control Amp In.

19 Control Amp In

Internal Control Amplifier Input. Control Amp In is normally connected to Ref Out (if not con­nected to external reference).

18 Control Amp Out Internal Control Amplifier Output. Control Amp Out is normally connected to Ref In.

26 Latch Enable Latch Control Line

24 R

SET

*

Connection for External Resistance Reference. R

SET

is used with the internal amplifier

(nominally 7.5kΩ).

23 N.C. No Connection. Not internally connected.

22 Ref GND Ground Return for Internal Voltage Reference and Amplifier

28 D1 (MSB) Digital Input Bit 1 (MSB)

27 DGND Digital Ground Return

*

Full-Scale Current Out = 128 (Control Amp In/R

SET

)

Figure 1. Timing Diagram

MAX5012

12-Bit, 100Msps ECL DAC

_______________________________________________________________________________________ 5

Figure 2. Typical Interface Circuit

MAX5012

MAX5012

12-Bit, 100Msps ECL DAC

6 _______________________________________________________________________________________

Analog V

EE

R

Set

N/C
Ref GND

Digital V

EE

Ref Out

Control Amp Out

Latch Enable

DGND

D1 (MSB)

Control Amp In

Ref In

Analog V

EE

I

Out

24

23

22

21

20

19

18

17

16

15

28

27

26

25

5

6

7

8

9

10

11

12

13

14

1

2

3

4

Digital V

EE

D6
D7
D8
D9

D10

D11

(LSB) D12

D2
D3
D4
D5

Analog Return

I

Out

PDIP

__________________________________________________________Pin Configurations

25

24

23

22

21

20

19

5

6

7

8

9

10

11

18

17

16

15

14

13

12

26

27

28

1

2

3

4

Analog V

EE

R

Set

N/C
Ref GND

Digital V

EE

Ref Out
Control Amp In

D6

D7
D8

D9

D10

D11

(LSB) D12

Latch Enable

DGND

(MSB) D1

D2

D3

D4

D5

Control Amp Out

Ref In

Analog V

EE

I

Out

Analog Return

Digital V

EE

I

Out

PLCC

TOP VIEW

DIP PLCC

MAX5012

MAX5012

MAX5012

12-Bit, 100Msps ECL DAC

_______________________________________________________________________________________ 7

________________________________________________________Package Information

28L PLCC

A
B

Pin
1

Pin
28

C

D

E

F

G

H

I

TOP

VIEW

Pin
1

BOTTOM

VIEW

INCHES MILLIMETERS

SYMBOL MIN MAX MIN MAX

A 0.450 0.456 11.43 11.58

B 0.485 0.495 12.32 12.57
C 45° 45°
D 0.165 0.175 4.19 4.45

E 0.010 0.25

F 0.022 typ .56 typ 0.00
G 0.18 typ 4.57 typ 0.00
H 0.05 typ 1.27 typ 0.00

I 0.039 0.430 0.99 10.92

MAX5012

12-Bit, 100Msps ECL DAC

___________________________________________Package Information (continued)

28L Plastic DIP

A

B

C

D

E

1

28

J

K

F

G

H

I

INCHES MILLIMETERS

SYMBOL MIN MAX MIN MAX

A 0.200 5.08
B 0.120 0.135 3.05 3.43

C 0.020 0.51
D 0.100 2.54

E 0.067 1.70
F 0.013 0.33

G 0.170 0.180 4.32 4.57
H 0.622 15.80

I 0.555 14.10

J 1.460 37.08
K 0.085 2.16

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8

_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.