Memory

All data sheets are subject to change without notice

09.12.02 REV 1

903

High Speed Comparator

EATURES:

• High-speed, low-power voltage comparator

•

RAD-PAK® radiation-hardened against

natural space radiation

• Total dose hardness: 100 krad (Si) typical;

dependent upon orbit

• 8ns typ propagation delay

• 18mW power consumption (typ at +5V)

• Separate analog and digital supplies

• Flexible analog supply: +5V to +10V or ±5V

• Input range includes negative supply rail

• TTL compatible outputs

• TTL compatible latch inputs

DESCRIPTION:

Maxwell Technologies’ 903 high-speed, low-

power voltage comparator features differential

analog inputs and TTL logic outputs with

active internal pull-ups. The 903 can be pow-

ered from separate analog and digital power

supplies or from a single combined supple

voltage. The analog input common-mode

range includes the negative rail, allowing

ground sensing when powered from a single

supply. When powered from +5V, the 903 con-

sumes 18mW. The 903 is equipped with a TTL

compatible latch input. The comparator output

is latched when the latch input is driven low.

Capable of surviving space environments, the

903 is ideal for satellite, spacecraft, and space

probe missions. Maxwell Technologies’ pat-

ented

RAD-PAK® packaging technology incor-

porates radiation shielding in the microcircuit

package. It eliminates box shielding while pro-

viding lifetime in orbit or space mission. In

GEO orbit, RAD-PAK® provides greater than

100 krad(Si) radiation dose rate. This product

is available with screening up to Class S.

IN+

IN-

LATCH

OU T

GND

Memory

09.12.02 REV 1

All data sheets are subject to change without notice

rights reserved.

High-Speed Comparator

903

TABLE 1. PINOUT DESCRIPTION

PIN NAME FUNCTION

Positive Analog Supply

2 IN+ Positive input

3 IN- Negative input

Negative analog supply and substrate

5 LATCH Latch input

6 GND Ground terminal

7 OUT Output

Positive digital supply

TABLE 2. ABSOLUTE MAXIMUM RATINGS

PARAMETER MIN MAX UNITS

Analog Supply Voltage (V

to V

)--+12V

Digital Supply Voltage (V

to GND) -- +7 V

Differential Input Voltage V

- 0.2 V

+ 0.2 V

Common-mode Input Voltage V

- 0.2 V

+ 0.2 V

Latch Input Voltage -0.2 V

+ 0.2 V

Output Short-circuit Duration to GND

Output Short-circuit Duration to V

Indefinite

-- 1 min.

Operating Temperature Ranges -55 +125 °C

Junction Temperature (Tj) -65 +160 °C

Storage Temperature Range -65 +150 °C

TABLE 3. AC ELECTRICAL CHARACTERISTICS

= +5V, V

= -5V, LATCH = LOGIC HIGH, T

= T

MIN

TO T

MAX

, UNLESS OTHERWISE SPECIFIED)

ARAMETER SYMBOL

TEST

ONDITIONS

SUBGROUPS MIN TYP MAX UNITS

Input-to-output High Response Time tpd+ VOD = 5mV,

CL = 15pF,

IO = 2mA

9, 10, 11 -- 10 15 ns

Input-to-output Low Response Time tpd- VOD = 5mV,

CL = 15pF,

IO = 2mA

9, 10, 11 -- 10 15 ns

Memory

09.12.02 REV 1

All data sheets are subject to change without notice

rights reserved.

High-Speed Comparator

903

Latch Disable to

Output High Delay

tpd+

9, 10, 11 10 ns

Latch Disable to

Output Low Delay

tpd-

9, 10, 11 12 ns

Minimum Setup Time ts

9, 10, 11 2 ns

Minimum Hold Time th

9, 10, 11 1 ns

Minimum Latch

Disable Pulse Width

tpw

9, 10, 11 10 ns

1. Guaranteed by design.

2. Owing to the difficult and critical nature of switching measurements involving the latch, these parameters cannot

be tested in a production environment. Typical specifications listed are taken from measurements using a high-

speed test fixture.

TABLE 4. DC ELECTRICAL CHARACTERISTICS

= +5V, V

= -5V, LATCH = LOGIC HIGH, T

= T

MIN

TO T

MAX

UNLESS OTHERWISE SPECIFIED)

PARAMETER

SYMBO

TEST CONDITIONS

SUBGROUP

MIN TYP MAX UNITS

Input Offset Voltage V

= 0V,

= 1.4V

1, 2, 3 -- 2 6 mV

Input Bias Current I

IN+

or I

IN-

1, 2, 3 -- 6 15 µA

Input Offset Current I

= 0V,

= 1.4V

1, 2, 3 -- 200 800 nA

Input Voltage Range V

1, 2, 3 V

0.1

-- V

2.25

Common-mode Rejection Ratio CMRR -5V < V

+2.75,

= 1.4V,

1, 2, 3 -- 120 500 µV/V

Power-supply Rejection Ratio PSRR

1, 2, 3 -- 150 500 µV/V

Output High Voltage V

> 250mV,

SRC

= 1mA

1, 2, 3 2.4 3.5 -- V

Output Low Voltage V

> 250mV,

SINK

= 8mA

1, 2, 3 -- 0.3 0.4 V

Latch Input Voltage High V

1, 2, 3 -- 1.4 2.0 V

Latch Input Voltage Low V

1, 2, 3 0.8 1.4 -- V

Latch Input Current High I

= 3.0V 1, 2, 3 -- 1 20 µA

Latch Input Current Low I

= 0.3V 1, 2, 3 -- 1 20 µA

TABLE 3. AC ELECTRICAL CHARACTERISTICS

= +5V, V

= -5V, LATCH = LOGIC HIGH, T

= T

MIN

TO T

MAX

, UNLESS OTHERWISE SPECIFIED)

ARAMETER SYMBOL

TEST

ONDITIONS

SUBGROUPS MIN TYP MAX UNITS

Part #	903
Description	Power Supply Module 4PinPlastic
Category	POWER SUPPLY
Availability	In Stock
Qty	1

903

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