MAXIM MAX9201, MAX9202, MAX9203 User Manual

General Description

The MAX9201/MAX9202/MAX9203 high-speed, lowpower, quad/dual/single comparators feature TTL logic outputs with active internal pullups. Fast propagation delay (7ns typ at 5mV overdrive) makes these devices ideal for fast A/D converters and sampling circuits, line receivers, V/F converters, and many other data-discrimination, signal restoration applications.

All comparators can be powered from separate analog and digital power supplies or from a single combined supply voltage. The analog input common-mode range includes the negative rail, allowing ground sensing when powered from a single supply. The MAX9201/ MAX9202/MAX9203 consume only 9mW per comparator when powered from a +5V supply.

The MAX9202/MAX9203 feature output latches with TTL compatible inputs. The comparator output states are held when the latch inputs are driven low. The MAX9201 provides all the same features as the MAX9202/MAX9203 with the exception of the latches.

The MAX9201/MAX9202/MAX9203 are lower power and lower cost upgrades to the MAX901/MAX902/MAX903 offering a 50% power savings and smaller packaging.

________________________Applications

____________________________Features

♦ Fast 7ns Propagation Delay

♦ Low 9mW/Comparator Power Consumption

♦ Separate Analog and Digital Supplies

♦ Flexible Analog Supply: +5V to +10V or ±5V

♦ Input Voltage Range Includes

Negative Supply Rail

♦ TTL-Compatible Outputs

♦ TTL-Compatible Latch Inputs

(MAX9202/MAX9203)

♦ Available in Space-Saving Packages

8-Pin SOT23 (MAX9203) 14-Pin TSSOP (MAX9202) 16-Pin TSSOP (MAX9201)

MAX9201/MAX9202/MAX9203

Low-Cost, 7ns, Low-Power

Voltage Comparators

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

N.C.

OUTB

LATCHBLATCHA

GND

INA+

INA-

MAX9202

INB+

INB-V

N.C.

OUTA

SO/TSSOP

INA- IND-

IND+

OUTD

OUTC

INC+

INC-

MAX9201

SO/TSSOP

INA+

GND

OUTA

OUTB

INB+

INB-

IN-

LATCH

87V

IN+OUT

GND

SOT23

MAX9203

GND

LATCHV

87V

OUTIN+

IN-

MAX9203

Pin Configurations

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX9201EUE -40°C to +85°C 16 TSSOP

MAX9201ESE -40°C to +85°C 16 Narrow SO

MAX9202EUD -40°C to +85°C 14 TSSOP

MAX9202ESD -40°C to +85°C 14 Narrow SO

-40°C to +85°C 8 SOT23-8

MAX9203ESA -40°C to +85°C 8 Narrow SO

Ordering Information

High-Speed A/D Converters

High-Speed V/F Converters

Line Receivers High-Speed Signal

Squaring/Restoration

Threshold Detectors Input Trigger Circuitry High-Speed Data

Sampling PWM Circuits

19-1936; Rev 1; 1/05

MAX9203EKA-T

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power Voltage Comparators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V, VEE= -5V, VDD= +5V, GND = 0, VCM= 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C,

unless otherwise noted.) (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.

Analog Supply Voltage (V

- VEE) .....................................+12V

Digital Supply Voltage (VDD) .................................................+7V

Differential Input Voltage..................(VEE- 0.3V) to (VCC+ 0.3V)

Common Mode Input Voltage ..........(VEE- 0.3V) to (VCC+ 0.3V)

Latch Input Voltage

(MAX9202/MAX9203 only) .....................-0.3V to (VDD+ 0.3V)

Output Short-Circuit Duration

To GND ......................................................................Continuous

To VDD..................................................................................1min

Continuous Power Dissipation (TA= +70°C)

8-Pin SOT23-8 (derate 9.1mW/°C above +70°C) ...727mW/°C

8-Pin SO (derate 5.9mW/°C above +70°C).............471mW/°C

14-Pin TSSOP (derate 9.1mW/°C above +70°C) ....727mW/°C

14-Pin SO (derate 8.3mW/°C above +70°C)...........667mW/°C

16-Pin TSSOP (derate 9.4mW/°C above +70°C) ....755mW/°C

16-Pin SO (derate 8.7mW/°C above +70°C)...........696mW/°C

Operating Temperature Range ...........................-45°C to +85°C

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

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Analog Supply Voltage Range

Referenced to V

Digital Supply Voltage Range V

Referenced to GND

TA = +25°C14

Input Offset Voltage V

VCM = 0, V

OUT

= 1.4V

= -40°C to +85°C 7.5

TA = +25°C

Input Bias Current I

IN+

or I

IN-

TA = -40°C to +85°C 7.0

µA

TA = +25°C50

Input Offset Current I

VCM = 0, V

OUT

= 1.4V

= -40°C to +85°C

Common-Mode Input Voltage Range

Note 2

C C -

2.25

TA = +25°C50

Common-Mode Rejection Ratio

OU T

= 1.4V

= -40°C to +85°C

µV/V

TA = +25°C50

Power-Supply Rejection Ratio

PSRR Note 3

= -40°C to +85°C

µV/V

Output High Voltage V

IN+

- V

IN-

) > 250mV, I

SOURCE

= 1mA 3.0 3.5 V

Output Low Voltage V

IN+

- V

IN-

) < -250mV, I

SINK

= 8mA

0.4 V

Latch Input Threshold Voltage High

Note 4 1.4 2 V

Latch Input Threshold Voltage Low

Note 4 0.8 1.4 V

Latch Input Current High I

VLH = 3.0V, Note 4 0.5 3 µA

Latch Input Current Low I

VLL = 0.3V, Note 4 0.5 3 µA

Input Capacitance C

4pF

Differential Input Impedance R

IND

5MΩ

Common-Mode Input Impedance

5.5 MΩ

MAX9201 4.7 7

MAX9202 2.5 4.0

Positive Analog Supply Current

Note 5

MAX9203 1.3 2

- V

4.75 10.5

4.75 5.25

CMRR

INCM

- 5.1V <

< +2.75V

C M

1.25

- 0.1

0.25

250

450

150

250

150

250

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

_______________________________________________________________________________________ 3

Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design. Note 2: Inferred by CMRR test. Note 3: Tested for +4.75V < V

< +5.25V, and -5.25V < VEE< -4.75V with VDD= +5V, although permissible analog power-supply

range is 4.75V < V

< +10.5V for single supply operation with VEEgrounded.

Note 4: Specification does not apply to MAX9201. Note 5: I

tested for 4.75V < VCC< +10.5V with VEEgrounded. IEEtested for -5.25V < VEE< -4.75V with VCC= +5V. IDDtested for

+4.75V < V

< +5.25V with all comparator outputs low, worst-case condition.

Note 6: Guaranteed by design. Times are for 100mV step inputs (see propagation delay characteristics in Figures 2 and 3) Note 7: Maximum difference in propagation delay between two comparators in the MAX9201/MAX9202.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX9201 3.4 5.0

MAX9202 1.8 3.0

Negative Analog Supply Current

Note 5

MAX9203 1.0 1.6

MAX9201 2 3.0

MAX9202 1 1.5Digital Supply Current I

Note 5

MAX9203 0.5 0.8

MAX9201 33 44

MAX9202 17 24

Power Dissipation P

= V

= +5V,

= 0V

MAX9203 9 13

TIMING CHARACTERISTICS

(VCC= +5V, VEE= -5V, VDD= +5V, GND = 0, VCM= 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at T

= +25°C, unless otherwise noted.) (Notes 1, 6)

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, VEE= -5V, VDD= +5V, GND = 0, VCM= 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TA = +25°C79

Input-to-Output High Response Time

PD+

VOD = 5mV, C

= 15pF,

OUT

= 2mA

= -40°C to +85°C12

TA = +25°C79

Input-to-Output Low Response Time

PD-

VOD = 5mV, C

= 15pF,

OUT

= 2mA

= -40°C to +85°C12

Rise Time t

CL = 15pF, I

OUT

= 2mA

= +25°C 2.0 ns

Fall Time t

CL = 15pF, I

OUT

= 2mA

= +25°C 1.0 ns

TA = +25°C 0.5 1.5

Difference in Response Time Between Outputs

∆t

Note 7

= -40°C to +85°C 2.5

Latch Disable to Output High Delay

Note 4 10 ns

Latch Disable to Output Low Delay

Note 4 10 ns

Minimum Setup Time t

Note 4 2 ns

Minimum Hold Time t

Note 4 1 ns

Minimum Latch Disable Pulse Width

Note 4 8 ns

tPD+(D)

tPD-(D)

tPW(D)

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power Voltage Comparators

4 _______________________________________________________________________________________

-1.5

-0.5

-1.0

0.5

1.0

1.5

-40 10-15 35 60 85

INPUT OFFSET VOLTAGE vs. TEMPERATURE

MAX9201 toc01

TEMPERATURE (°C)

INPUT OFFSET VOLTAGE (mV)

2.8

3.2

3.0

3.6

3.4

3.8

4.0

046281012

OUTPUT HIGH VOLTAGE (VOH)

vs. LOAD CURRENT

MAX9201 toc03

LOAD CURRENT (mA)

OUTPUT HIGH VOLTAGE (V)

TA = -40°C

TA = +85°C

TA = +25°C

100

150

200

250

300

350

400

042681012

OUTPUT LOW VOLTAGE (VOL)

vs. LOAD CURRENT

MAX9201 toc04

LOAD CURRENT (mA)

OUTPUT LOW VOLTAGE (mV)

TA = +85°C

TA = +25°C

TA = -40°C

5.0

6.0

5.5

7.0

6.5

8.0

7.5

8.5

9.5

9.0

10.0

0 1015205 253035 4540 50

RESPONSE TIME vs. INPUT OVERDRIVE

MAX9201 toc06

INPUT OVERDRIVE (mV)

RESPONSE TIME (ns)

PD-

PD+

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

5678910

ICC SUPPLY CURRENT (PER COMPARATOR)

vs. V

SUPPLY VOLTAGE

MAX9201 toc05

VCC SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C

TA = -40°C

VEE = GND

Typical Operating Characteristics

(VCC= +5V, VEE= -5V, VDD= +5V, GND = 0, VCM= 0, LATCH_ = logic high, V

OUT

= 1.4V, TA= +25°C, unless otherwise noted.)

0.4

0.8

0.6

1.2

1.0

1.6

1.4

1.8

-40 10-15 35 60 85

INPUT BIAS CURRENT vs. TEMPERATURE

MAX9201 toc02

TEMPERATURE (°C)

INPUT BIAS CURRENT (µA)

VCM = 0

MAX9201/MAX9202/MAX9203

Low Cost, 7ns, Low-Power

Voltage Comparators

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VCC= +5V, VEE= -5V, VDD= +5V, GND = 0, VCM= 0, LATCH_ = logic high, V

OUT

= 1.4V, TA= +25°C, unless otherwise noted.)

Pin Description

6.0

7.0

6.5

8.5

8.0

7.5

9.5

9.0

10.0

0304010 20 50 60 70 80 90

RESPONSE TIME vs. LOAD CAPACITANCE

(5mV OVERDRIVE, R

LOAD

= 2.4kΩ)

MAX9201 toc08

LOAD CAPACITANCE (pF)

RESPONSE TIME (ns)

PD-

PD+

6.5

7.0

6.8

7.5

7.3

7.8

8.0

-40-30-20-100 1020304050607080 90

RESPONSE TIME vs. TEMPERATURE

(5mV OVERDRIVE)

MAX9201 toc07

TEMPERATURE (°C)

RESPONSE TIME (ns)

PD-

PD+

NAME

FUNCTION

1, 8, 9,

IN_-

Negative Input (Channels A, B, C, D)

2, 7, 10,

IN_+

Positive Input (Channels A, B, C, D)

3 GND Ground

4, 5, 12,

OUT_ Output (Channels A, B, C, D)

Negative Analog Supply and Substrate

11 V

Positive Digital Supply

14 V

Positive Analog Supply

MAX9201 MAX9202

PIN NAME FUNCTION

1, 8 IN_- Negative Input (Channels A, B)

2, 9 IN_+ Positive Input (Channels A, B)

3 GND Ground

4, 11 LATCH_ Latch Input (Channels A, B)

5, 12 OUT_ Output (Channels A, B)

6, 13 N.C. No Connection

Negative Analog Supply and Substrate

Positive Digital Supply

Positive Analog Supply

10 V

14 V

Applications Information

Circuit Layout

Because of the large gain-bandwidth transfer function of the MAX9201/MAX9202/MAX9203 special precautions must be taken to realize their full high-speed capability. A printed circuit board with a good, lowinductance ground plane is mandatory. All decoupling capacitors (the small 100nF ceramic type is a good choice) should be mounted as close as possible to the power-supply pins. Separate decoupling capacitors for analog VCCand for digital VDDare also recommended. Close attention should be paid to the bandwidth of the

decoupling and terminating components. Short lead lengths on the inputs and outputs are essential to avoid unwanted parasitic feedback around the comparators. Solder the device directly to the printed circuit board instead of using a socket.

Input Slew-Rate Requirements

As with all high-speed comparators, the high gain-bandwidth product of the MAX9201/MAX9202/ MAX9203 can create oscillation problems when the input traverses the linear region. For clean output switching without oscillation or steps in the output waveform, the input must meet minimum slew-rate requirements (0.5V/s typ). Oscillation is largely a function of board layout and of coupled source impedance and stray input capacitance. Both poor layout and large source impedance will cause the part to oscillate and increase the minimum slew-rate requirement. In some applications, it may be helpful to apply some positive feedback between the output and positive input. This pushes the output through the transition region clearly, but applies a hysteresis in threshold seen at the input terminals.

TTL Output and Latch Inputs

The comparator TTL output stages are optimized for driving low-power Schottky TTL with a fan-out of four.

When the latch is connected to a logic high level, the comparator is transparent and immediately responds to changes at the input terminals. When the latch is connected to a TTL low level, the comparator output latches (in the same state) the instant that the latch command is applied, and will not respond to subsequent changes at the input. No latch is provided on the MAX9201.

6 _______________________________________________________________________________________

MAX9201/9202/9203

Low Cost, 7ns, Low-Power Voltage Comparators

FUNCTION

18VCCPositive Analog Supply

2 7 IN+ Positive Input

3 6 IN- Negative Input

45V

Negative Analog Supply and Substrate

Latch Input

6 3 GND Ground

7 2 OUT Output

81VDDPositive Digital Supply

Pin Description (continued)

GND

OUT

+10V

+5V

Typical Power-Supply Alternatives

Figure 1a. Separate Analog Supply, Common Ground

Figure 1b. Single +5V Supply, Common Ground

Figure 1c. Split ±5V Supply, Separate Ground

MAX9203

NAME

SO SOT

LATCH

+5V

OUT

GND

+5V

-5V

+5V

OUT

GND

_______________________________________________________________________________________ 7

MAX9201/9202/9203

Low Cost, 7ns, Low-Power

Voltage Comparators

Power Supplies

The MAX9201/MAX9202/MAX9203 can be powered from separate analog and digital supplies or from a single +5V supply. The analog supply can range from +5V to +10V with V

grounded for single-supply operation (Figures 1a and 1b) or from a split ±5V supply (Figure 1c). The V

digital supply always requires +5V.

In high-speed, mixed-signal applications where a common ground is shared, a noisy digital environment can adversely affect the analog input signal. When set up with separate supplies, the MAX9201/MAX9202/MAX9203 isolate analog and digital signals by providing a separate analog ground (V

) and digital ground (GND).

Definition of Terms

Input Offset Voltage: Voltage applied be-

tween the two input terminals to obtain TTL logic threshold (+1.4V) at the output.

Input Voltage Pulse Amplitude: Usually set

to 100mV for comparator specifications.

Input Voltage Overdrive: Usually set to 5mV

and in opposite polarity to VINfor comparator specifications.

pd+

Input to Output High Delay: The propagation

delay measured from the time the input signal crosses the input offset voltage to the TTL logic threshold (+1.4V) of an output low to high transition.

pd-

Input to Output Low Delay: The propagation

delay measured from the time the input signal crosses the input offset voltage to the TTL logic threshold (+1.4V) of an output high to low transition.

pd+

(D) Latch Disable to Output High Delay: The

propagation delay measured from the latch signal crossing the TTL logic threshold (+1.4V) in a low to high transition to the point of the output crossing TTL threshold (+1.4V) in a low to high transition.

tpd- (D) Latch Disable to Output Low Delay: The

propagation delay measured from the latch signal crossing the TTL threshold (+1.4V) in a low to high transition to the point of the output crossing TTL threshold (+1.4V) in a high to low transition.

Minimum Setup Time: The minimum time,

before the negative transition of the latch signal, that an input signal change must be present in order to be acquired and held at the outputs.

Minimum Hold Time: The minimum time,

after the negative transition of the latch signal, that an input signal must remain unchanged in order to be acquired and held at the output.

(D) Minimum Latch Disable Pulse Width: The

minimum time that the latch signal must remain high in order to acquire and hold an input signal change.

Figure 2. MAX9201/MAX9202/MAX9203 Diagram Figure 3. t

PD+

Response Time to 5mV Overdrive

LATCH

ENABLE

INPUT

pd+

(D)

tpw (D)

sth

LATCH

COMPARE

LATCH

COMPARE

COMPARATOR

OUTPUT

1.4V

INPUT

OUTPUT

5ns/div

+ 5mV

50mV/div

1V/div

MAX9201/9202/9203

Low Cost, 7ns, Low-Power Voltage Comparators

Figure 4. t

PD-

Response Time to 5mV Overdrive Figure 5. Response-Time Setup

5ns/div

OUTPUT

INPUT

+ 5mV

50mV/div

1V/div

Figure 6. Response to 50MHz Sine Wave

Figure 7. Response to 100MHz Sine Wave

5ns/div

OUTPUT

INPUT

2V/div

10mV/div

Chip Information

MAX9201 TRANSISTOR COUNT: 348

MAX9202 TRANSISTOR COUNT: 176

MAX9203 TRANSISTOR COUNT: 116

PROCESS: Bipolar

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

INPUT TO 10X SCOPE PROBE (10MΩ 14pF)

PRECISION

STEP

GENERATOR

OFFSET

ADJUST

OUTPUT

= +5V VDD = +5V

10kΩ

D.U.T.

100nF

= -5V

1kΩ

10kΩ

100nF

2.43kΩ

OUTPUT TO 10X

SCOPE PROBE

(10MΩ 14pF)

100nF

2V/div

INPUT

5ns/div

10mV/div

MAXIM MAX9201, MAX9202, MAX9203 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual