Rainbow Electronics MAX909 User Manual

MAX907/MAX908/MAX909

Dual/Quad/Single, High-Speed, Ultra-Low-Power,

Single-Supply TTL Comparators

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

19-0129; Rev. 4; 9/01

General Description

The MAX907/MAX908/MAX909 are dual/quad/single,
high-speed, ultra-low-power voltage comparators
designed for use in systems powered from a single
+5V supply; the MAX909 also accepts dual ±5V sup­plies. Their 40ns propagation delay (with 5mV input
overdrive) is achieved with a power consumption of
only 3.5mW per comparator. The wide input common­mode range extends from 200mV below ground (below
the negative supply rail for the MAX909) to within 1.5V
of the positive supply rail.

Because they are micropower, high-speed compara­tors that operate from a single +5V supply and include
built-in hysteresis, these devices replace a variety of
older comparators in a wide range of applications.

MAX907/MAX908/MAX909 outputs are TTL-compati­ble, requiring no external pullup circuitry. All inputs and
outputs can be continuously shorted to either supply
rail without damage. These easy-to-use comparators
incorporate internal hysteresis to ensure clean output
switching even when the devices are driven by a slow­moving input signal.

The MAX909 features complementary outputs and an
output latch. A separate supply pin for extending the
analog input range down to -5V is also provided.

The dual MAX907 and single MAX909 are available in
8-pin DIP and SO packages, and the quad MAX908 is
available in 14-pin DIP and SO packages. These com­parators are ideal for single +5V-supply applications
that require the combination of high speed, precision,
and ultra-low power dissipation.

Applications

Battery-Powered Systems

High-Speed A/D Converters

High-Speed V/F Converters

Line Receivers

Threshold Detectors/Discriminators

High-Speed Sampling Circuits

Zero-Crossing Detectors

Features

♦ 40ns Propagation Delay

♦ 700µA (3.5mW) Supply Current per Comparator

♦ Single 4.5V to 5.5V Supply Operation

(or ±5V, MAX909 only)

♦ Wide Input Range Includes Ground

(or -5V, MAX909 only)

♦ Low, 500µV Offset Voltage

♦ Internal Hysteresis Provides Clean Switching

♦ TTL-Compatible Outputs

(Complementary on MAX909)

♦ Input and Output Short-Circuit Protection

♦ Internal Latch (MAX909 only)

Ordering Information

PART

TEMP. RANGE PIN-PACKAGE

MAX907CPA

0°C to +70°C 8 Plastic DIP

MAX907CSA 0°C to +70°C 8 SO

MAX907EPA 8 Plastic DIP

MAX907ESA

-40°C to +85°C

-40°C to +85°C

8SO

Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.

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.

TOP VIEW

OUTA

INA-

INA+

GND

OUTA

INA-

INA+

INB+

INB-

OUTB

1

2

3

4

MAX907

DIP/SO

1

2

3

4

V+

MAX908

5

6

7

DIP/SO

14

13

12

11

10

8

V+

OUTB

7

INB-

6

5

INB+

OUTD

IND-

IND+

GND

INC+

INC-

9

8

OUTC

MAX907/MAX908/MAX909

Dual/Quad/Single, High-Speed, Ultra-Low-Power,

Single-Supply TTL Comparators

2 _______________________________________________________________________________________

Positive Supply Voltage (V+ to GND) ........................+6V

Negative Supply Voltage (V- to GND, MAX909 only) .........-7V

Differential Input Voltage

MAX907/MAX908 ..........................-0.3V to (V+ + 0.3V)

MAX909 ..............................(V- - 0.3V) to (V+ + 0.3V)

Common-Mode Input Voltage

MAX907/MAX908 ..........................-0.3V to (V+ + 0.3V)

MAX909 ..............................(V- - 0.3V) to (V+ + 0.3V)

Latch Input Voltage (MAX909 only) .........-0.3V to (V+ + 0.3V)

Input/Output Short-Circuit Duration to V+ or GND .. . Continuous

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

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) . .. 800mW

14-Pin SO (derate 8.33mW/°C above +70°C) ..........667mW

Operating Temperature Ranges:

MAX90_C_ _ ......................................0°C to +70°C

MAX90_E_ _ ...................................-40°C to +85°C

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

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

ELECTRICAL CHARACTERISTICS

(V+ = 5V, TA= +25°C; MAX909 only: V- = 0, V

LATCH

= 0; 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.

ABSOLUTE MAXIMUM RATINGS

PARAMETER CONDITIONS MIN TYP MAX UNITS

Positive Trip Point

V

TRIP+

(Note 1) 24 mV

Negative Trip Point

V

TRIP-

(Note 1) -2 -4 mV

Input Offset Voltage

V

OS

(Note 2) 0.5 2.0 mV

Input Bias Current

I

B

VCM= 0, VIN= V

OS

100 300 nA

Input Offset Current

I

OS

VCM= 0, VIN= V

OS

25 50 nA

Input Voltage Range

V

CMR

-0.2 V+ - 1.5
V

-5.2 V+ - 1.5

Common-Mode Rejection Ratio CMRR (Notes 4, 5) 50 100 µV/V

Power-Supply Rejection Ratio PSRR (Notes 4, 6) 50 100 µV/V

Output High Voltage

V

OH

I

SOURCE

= 100µA

3.0 3.5

VOutput Low Voltage

V

OL

I

SINK

= 3.2mA

0.3 0.4

I

SINK

= 8mA

0.4

Positive Supply Current per
Comparator

I+ (Note 7)

0.7 1.0
mA

1.2 1.8

Negative Supply Current I- MAX909 only: V- = -5V 60 100 µA

Power Dissipation per
Comparator

PD (Note 8)

3.5 5.5

mW

610

Output Rise Time

t

r

12 ns

Output Fall Time

t

f

6 ns

SYMBOL

MAX907/MAX908/MAX90 9

MAX907/MAX908

MAX909

MAX909

(Notes 3, 4)

MAX907/MAX908

V

OUT

= 0.4V to 2.4V, CL= 10pF

V

OUT

= 2.4V to 0.4V, CL= 10pF

V

MAX909 only: V- = -5V

MAX907/MAX908/MAX909

Dual/Quad/Single, High-Speed, Ultra-Low-Power,

Single-Supply TTL Comparators

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 5V, TA= +25°C; MAX909 only: V- = 0, V

LATCH

= 0; unless otherwise noted.)

PARAMETER

SYMBOL CONDITIONS MIN TYP MAX UNITS

Propagation Delay

t

PD+,tPD-

40 50 ns

Differential Propagation Delay

∆t

PD

1 ns

Propagation Delay Skew

tPDskew

2 ns

Latch Input Voltage High

V

IH

(Note 12) 2.0 V

Latch Input Voltage Low

V

IL

(Note 12) 0.8 V

Latch Input Current

IIH, I

IL

(Note 12) 20 µA

Latch Setup Time

t

s

(Note 12) 2 ns

Latch Hold Time

t

h

(Note 12) 2 ns

VIN= 100mV, VOD= 5mV,
(Note 9)

VIN= 100mV, VOD= 5mV,
(Note 10)

MAX909 only: VIN= 100mV,
V

OD

= 5mV, (Note 11)

ELECTRICAL CHARACTERISTICS

(V+ = 5V, TA= T

MIN

to T

MAX

; MAX909 only: V- = 0, V

LATCH

= 0; unless otherwise noted.)

Positive Trip Point V

Negative Trip Point V

Input Offset Voltage V

Input Bias Current I

Input Offset Current I

Input Voltage Range V

Common-Mode Rejection Ratio CMRR (Notes 4, 5) 75 200 µV/V

Power-Supply Rejection Ratio PSRR (Notes 4, 6) 75 200 µV/V

Output High Voltage V

Output Low Voltage V

Positive Supply Current per
Comparator

Negative Supply Current I- MAX909 only; V- = -5V 100 200 µV

Power Dissipation per
Comparator

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TRIP+

TRIP-

OS

B

OS

CMR

OH

OL

I+ (Note 7)

PD (Note 8)

(Note 1) 2 5 mV

(Note 1) -2 -5 mV

(Note 2) 1 3 mV

V

= 0, V

CM

V

= 0, V

CM

C/E temp.
ranges
(Notes 3, 4)

I

SOURCE

I

SINK

= 100µA 2.8 3.5 V

= 3.2mA

IN

IN

= V

OS

= V

OS

MAX907/MAX908/MAX909 -0.2 V+ - 1.5

MAX909 only, V- = -5V -5.2 V+ - 1.5

T

= T

A

MAX

T

= 0°C 0.425

MIN

T

= -40°C 0.450

MIN

200 500 nA

50 100 nA

MAX907/MAX908 0.8 1.2

MAX909 1.2 2.0

MAX907/MAX908 4 7

MAX909 6 11

V

0.4

V

mA

mW