MAXIM MAX912, MAX913 User Manual

General Description

The MAX913 single and MAX912 dual, high-speed,
low-power comparators have differential inputs and
complementary TTL outputs. Fast propagation delay
(10ns, typ), extremely low supply current, and a wide
common-mode input range that includes the negative
rail make the MAX912/MAX913 ideal for low-power,
high-speed, single +5V (or ±5V) applications such as
V/F converters or switching regulators.

The MAX912/MAX913 outputs remain stable through
the linear region. This feature eliminates output instabili­ty common to high-speed comparators when driven
with a slow-moving input signal.

The MAX912/MAX913 can be powered from a single
+5V supply or a ±5V split supply. The MAX913 is an
improved plug-in replacement for the LT1016. It pro­vides significantly wider input voltage range and equiv­alent speed at a fraction of the power. The MAX912
dual comparator has equal performance to the MAX913
and includes independent latch controls.

Applications

Zero-Crossing Detectors

Ethernet Line Receivers

Switching Regulators

High-Speed Sampling Circuits

High-Speed Triggers

Extended Range V/F Converters

Fast Pulse Width/Height Discriminators

Features

♦ Ultra Fast (10ns)

♦ Single +5V or Dual ±5V Supply Operation

♦ Input Range Extends Below Negative Supply

♦ Low Power: 6mA (+5V) Per Comparator

♦ No Minimum Input Signal Slew-Rate Requirement

♦ No Power-Supply Current Spiking

♦ Stable in the Linear Region

♦ Inputs Can Exceed Either Supply

♦ Low Offset Voltage: 0.8mV

♦ Now Available in a Small µMAX Package

MAX912/MAX913

Single/Dual, Ultra-Fast, Low-Power

Precision TTL Comparators

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

Ordering Information

19-0157; Rev 2; 8/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX912CPE 0°C to +70°C 16 Plastic DIP

MAX912CSE 0°C to +70°C 16 Narrow SO

MAX912EPE -40°C to +85°C 16 Plastic DIP

MAX912ESE -40°C to +85°C 16 Narrow SO

MAX913CPA 0°C to +70°C 8 Plastic DIP

MAX913CSA 0°C to +70°C 8 SO

MAX913EPA -40°C to +85°C 8 Plastic DIP

MAX913ESA -40°C to +85°C 8 SO

MAX913EUA -40°C to +85°C 8 µMAX

TOP VIEW

MAX912

QA

MAX913

1

V+

2

3

IN-

4

DIP/SO/µMAX

87Q

6

5

QIN+

GND

LEV-

1

2

QA

GND

3

4

LEA

N.C.

5

6

V-

7

INA-

INA+

8

DIP/NARROW SO

A

B

QB

16

QB

15

GND

14

LEB

13

N.C.

12

V+

11

10

INB-

9

INB+

MAX912/MAX913

Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

V+ = +5V, V- = -5V, VQ= 1.4V, VLE= 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

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.

Positive Supply Voltage .........................................................+7V

Negative Supply Voltage ........................................................-7V

V+ to V- ................................................................................+13V

Differential Input Voltage .....................................................+15V

Input Voltage (Referred to V-) ................................-0.3V to +14V

Latch Pin Voltage .............................................Equal to Supplies

Continuous Output Current...............................................±20mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW

16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)842mW

16-Pin Narrow SO (derate 8.70mW/°C above +70°C) .696mW
Operating Temperature Ranges:

MAX91_C_ _ ...........................................................0°C to +70°C

MAX91_E_ _.........................................................-40°C to +85°C

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

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

Input Offset Voltage (Note 2) V

Offset Drift TCV

Input Offset Current (Note 2) I

Input Bias Current I

Input Voltage Range V

Common-Mode Rejection Ratio CMRR -5.0V ≤ VCM ≤ +3.5V 80 110 dB

Power-Supply Rejection Ratio PSRR

Small-Signal Voltage Gain A

Output Voltage

Positive Supply Current Per
Comparator (Note 3)

Negative Supply Current Per
Comparator (Note 3)

Latch-Pin High Input Voltage V

Latch-Pin Low Input Voltage V

Latch-Pin Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RS ≤ 100Ω

OS

OS

OS

V

V

I+ C, E temperature ranges 6 10 mA

TA = +25°C 0.3 0.5

TA = T

TA = +25°C25

B

C, E temperature ranges 8

C, E temperature ranges -5.2 +3.5

CM

Single +5V C, E temperature ranges -0.2 +3.5

Positive supply; 4.5V ≤ V+ ≤ 5.5V 60 85

Negative supply; -2V ≥ V- ≥ -7V 80 100

1V ≤ VQ ≤ 2V, TA = +25°C 1500 3500 V/V

V

V+ ≥ 4.5V

OH

I

OL

I- 1 2 mA

IH

IL

IL

SINK

TA = +25°C, I

VLE = 0V -1 -20 µA

MIN TO TMAX

= 4mA 0.3 0.5

SINK

TA = +25°C 0.1 2

= T

T

A

MIN TO TMAX

2 µV/°C

I

= 1mA 2.7 3.4

OUT

= 10mA 2.4 3.0

I

OUT

= 10mA 0.4

2.0 V

3

1

0.8 V

mV

µA

µA

V

dB

V

MAX912/MAX913

Single/Dual, Ultra-Fast, Low-Power

Precision TTL Comparators

_______________________________________________________________________________________ 3

Note 1: All specifications are 100% tested at TA= +25°C, unless otherwise noted. Specification limits over temperature (TA= T

MIN

to T

MAX

) are guaranteed by design.

Note 2: Input Offset Voltage (V

OS

) is defined as the average of the two input offset voltages, measured by forcing first one output,

then the other to 1.4V. Input Offset Current (I

OS

) is defined the same way.

Note 3: Supply currents are measured with V

Q

driven to both VOHand VOL(not 1.4V).

Note 4: Propagation Delay (t

PD

) and Differential Propagation Delay (∆tPD) cannot be measured in automatic handling equipment

with low input overdrive values. Characterization and correlation tests have shown that t

PD

and ∆tPDlimits can be guaran­teed by design. Electrical Characteristic DC tests are performed to guarantee that all internal bias conditions are correct.
For low overdrive conditions, V

OS

is added to overdrive. Differential Propagation Delay is defined as ∆tPD= t

PD+

- t

PD-

.

Note 5: Input latch setup time (t

SU

) is the interval in which the input signal must be stable prior to asserting the latch signal. The hold

time (t

H

) is the interval after the latch is asserted in which the input signal must be stable. These parameters are guaranteed

by design.

Note 6: Latch Propagation Delay (t

LPD

) is the delay time for the output to respond when the latch-enable pin is deasserted (see

Timing Diagram).

ELECTRICAL CHARACTERISTICS (continued)

V+ = +5V, V- = -5V, VQ= 1.4V, VLE= 0V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Propagation Delay (Note 4) t

Differential Propagation Delay
(Note 4)

Channel-to-Channel Propagation
Delay (Note 4)

Latch Setup Time (Note 5) t

Latch Hold Time (Note 5) t

Latch Propagation Delay (Note 6) t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

, t

PD+

PD-

∆t

PD

SU

H

LPD

∆VIN = 100mV,
V

OD

∆VIN = 100mV,
V

OD

∆VIN = 100mV,
V

OD

∆V
V

OD

(MAX912 only)

TA = +25°C1014

= 5mV

= 20mV

= 5mV

= 100mV,

IN

= 5mV

T

= T

A

MIN TO TMAX

TA = +25°C912

T

= T

A

MIN TO TMAX

T

= +25°C

A

T

= +25°C 500 ps

A

MAX913 2 4

MAX912 3 5

20 ns

52 ns

7ns

16

15

ns

ns

MAX912/MAX913

Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators

4 _______________________________________________________________________________________

Typical Operating Characteristics

(V+ = +5V, V- = -5V, VLE= 0V, CL= 15pF, TA= +25°C, unless otherwise noted.)

10

9

8

7

6

5

1 10 100

PROPAGATION DELAY
vs. INPUT OVERDRIVE

MAX912/13 toc01

INPUT OVERDRIVE (mV)

PROPAGATION DELAY (ns)

t

PD+

t

PD-

20

0

1 10 100 1k 10k

PROPAGATION DELAY

vs. SOURCE RESISTANCE

4

MAX912/13 toc02

SOURCE RESISTANCE (Ω)

PROPAGATION DELAY (ns)

8

12

16

14

10

6

2

18

t

PD+

VOD = 10mV

t

PD-

PROPAGATION DELAY

vs. LOAD CAPACITANCE

MAX912/13 toc03

LOAD CAPACITANCE (pF)

PROPAGATION DELAY (ns)

403020

2

4

6

8

10

12

14

0

10 50

t

PD+

t

PD-

VOD = 10mV

PROPAGATION DELAY

vs. TEMPERATURE

MAX912/13 toc04

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

60

40

200-20

6

7

8

9

10

11

5

-40

80

VOD = 5mV

Q OUTPUT
t

PD-

Q OUTPUT
t

PD-

Q OUTPUT
t

PD+

Q OUTPUT
t

PD+

POSITIVE SUPPLY CURRENT

(PER COMPARATOR)

vs. POSITIVE SUPPLY VOLTAGE

MAX912/13 toc05

V+ (V)

I+ (mA)

654

1

2

3

4

5

6

7

8

9

10

0

37

V- = 0 TO 5V

TA = +85°C

TA = -40°C

TA = +25°C

NEGATIVE SUPPLY CURRENT

(PER COMPARATOR)

vs. NEGATIVE SUPPLY VOLTAGE

MAX912/13 toc06

V- (V)

I- (mA)

654321

0.4

0.6

0.8

1.0

1.2

1.4

0.2
07

TA = +85°C

TA = -40°C

TA = +25°C

OFFSET VOLTAGE

vs. TEMPERATURE

MAX912/13 toc07

TEMPERATURE (°C)

OFFSET VOLTAGE (µV)

6040200-20

100

200

300

400

500

600

0

-40 80

INPUT BIAS CURRENT

vs. TEMPERATURE

MAX912/13 toc08

TEMPERATURE (°C)

INPUT BIAS CURRENT (µA)

6040200-20

0.5

1.0

1.5

2.0

2.5

3.0

0

-40 80

VCM = -5.2V

VCM = 0V
V

CM

= 3.5V

OUTPUT VOLTAGE

vs. DIFFERENTIAL INPUT VOLTAGE

MAX912/13 toc09

DIFFERENTIAL INPUT VOLTAGE (mV)

OUTPUT VOLTAGE (V)

21-2 -1 0

1

2

3

4

5

0

-3 3