Linear LT1713CMS8, LT1713IMS8, LT1714CGN, LT1714IGN Schematic [ru]

LT1713/LT1714

Single/Dual, 7ns, Low Power,

3V/5V/±5V Rail-to-Rail Comparators

U

FEATURES

■

Ultrafast: 7ns at 20mV Overdrive

8.5ns at 5mV Overdrive

■

Rail-to-Rail Inputs

■

Rail-to-Rail Complementary Outputs
(TTL/CMOS Compatible)

■

Specified at 2.7V, 5V and ±5V Supplies

■

Low Power (Per Comparator): 5mA

■

Output Latch

■

Inputs Can Exceed Supplies Without Phase Reversal

■

LT1713: 8-Lead MSOP Package

■

LT1714: 16-Lead Narrow SSOP Package

U

APPLICATIO S

■

High Speed Automatic Test Equipment

■

Current Sense for Switching Regulators

■

Crystal Oscillator Circuits

■

High Speed Sampling Circuits

■

High Speed A/D Converters

■

Pulse Width Modulators

■

Window Comparators

■

Extended Range V/F Converters

■

Fast Pulse Height/Width Discriminators

■

Line Receivers

■

High Speed Triggers UltraFast is a trademark of Linear Technology Corporation.

DESCRIPTIO

The LT®1713/LT1714 are UltraFastTM 7ns, single/dual
comparators featuring rail-to-rail inputs, rail-to-rail
complementary outputs and an output latch. Optimized
for 3V and 5V power supplies, they operate over a single
supply voltage range from 2.4V to 12V or from ±2.4V to
±6V dual supplies.

The LT1713/LT1714 are designed for ease of use in a
variety of systems. In addition to wide supply voltage
flexibility, rail-to-rail input common mode range extends
100mV beyond both supply rails and the outputs are
protected against phase reversal for inputs extending
further beyond the rails. Also, the rail-to-rail inputs may be
taken to opposite rails with no significant increase in input
current. The rail-to-rail matched complementary outputs
interface directly to TTL or CMOS logic and can sink 10mA
to within 0.5V of GND or source 10mA to within 0.7V of V+.

The LT1713/LT1714 have internal TTL/CMOS compatible
latches for retaining data at the outputs. Each latch holds
data as long as its latch pin is held high. Latch pin
hysteresis provides protection against slow moving or
noisy latch signals. The LT1713 is available in the 8-lead
MSOP package. The LT1714 is available in the 16-lead
narrow SSOP package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

A 4× NTSC Subcarrier Voltage-Tunable Crystal Oscillator

1M

1M

100pF

LT1713

MV-209

VARACTOR

DIODE

1M

15pFY1** 100pF

2k

* 1% FILM RESISTOR
** NORTHERN ENGINEERING LABS C-2350N-14.31818MHz

390Ω

5V

2k

+

–

200pF

U

1N4148

1M*

0.047µF
C SELECT
(CHOOSE FOR CORRECT
PLL LOOP RESPONSE)

5V

47k*

LT1004-2.5

3.9k*

1k*

FREQUENCY
OUTPUT

171314 TA01

V

IN

0V TO 5V

LT1713/LT1714 Propagation Delay

vs Input Overdrive

9.0

8.5

8.0

7.5

7.0

6.5

6.0

PROPAGATION DELAY (ns)

5.5

5.0
0

+

t

PD

–

t

PD

10 20 40

INPUT OVERDRIVE (mV)

TA = 25°C

+

= 5V

V

–

V

= 0V

= 100mV

V

STEP

50

30

60

171314 TA02

1

LT1713/LT1714

GN PACKAGE

16-LEAD PLASTIC SSOP

1
2
3
4
5
6
7
8

TOP VIEW

16
15
14
13
12
11
10

9

–IN A
+IN A

V

–

V

+

V

+

V

–

+IN B
–IN B

GND
Q A
Q A
Q B
Q B
GND

LATCH
ENABLE B

LATCH
ENABLE A

WWWU

ABSOLUTE AXI U RATI GS

(Note 1)

Supply Voltage

V+ to V–............................................................ 12.6V

V+ to GND ........................................................ 12.6V

V– to GND .............................................– 10V to 0.3V

Differential Input Voltage ................................... ±12.6V

Latch Pin Voltage...................................................... 7V

Input and Latch Current..................................... ±10mA

UU

W

PACKAGE/ORDER I FOR ATIO

ORDER PART

NUMBER

TOP VIEW

+

V

1
2

+IN

3

–IN

–

4

V

MS8 PACKAGE

8-LEAD PLASTIC MSOP

T

= 150°C, θJA = 250°C/W

JMAX

8

Q OUT

7

Q OUT

6

GND

5

LATCH
ENABLE

LT1713CMS8
LT1713IMS8

MS8 PART MARKING

LTRD
LTUK

Output Current (Continuous) ..............................±20mA

Operating Temperature Range ................ – 40°C to 85°C

Specified Temperature Range (Note 2)... –40°C to 85°C

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

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

ORDER PART

NUMBER

LT1714CGN
LT1714IGN

GN PART MARKING

1714
1714I

T

= 150°C, θJA = 120°C/W

JMAX

Consult factory for parts specified with wider operating temperature ranges.

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V+ = 2.7V or V+ = 5V, V– = 0V, VCM = V+/2, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

+

V
V

OS

∆VOS/∆T Input Offset Voltage Drift ● 5 µV/°C
I

OS

I

B

V

CM

CMRR Common Mode Rejection Ratio V+ = 5V, 0V ≤ VCM ≤ 5V 60 70 dB

2

Positive Supply Voltage Range ● 2.4 7 V
Input Offset Voltage (Note 4) RS = 50Ω, VCM = V+/2 0.5 4 mV

Input Offset Current 0.1 1 µA

Input Bias Current (Note 5) –7 –1.5 2 µA

Input Voltage Range (Note 9) ● –0.1 V+ + 0.1 V

= 0.8V, C

LATCH

RS = 50Ω, VCM = V+/2 (Note 11) ● 5mV

= 50Ω, VCM = 0V 0.7 mV

R

S

= 50Ω, VCM = V

R

S

+

= 5V, 0V ≤ VCM ≤ 5V ● 58 dB

V

+

= 2.7V, 0V ≤ VCM ≤ 2.7V 57 70 dB

V
V+ = 2.7V, 0V ≤ VCM ≤ 2.7V ● 55 dB

LOAD

= 10pF, V

+

OVERDRIVE

= 20mV, unless otherwise specified.

1mV

● 2 µA

● –15 5 µA

LT1713/LT1714

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V+ = 2.7V or V+ = 5V, V– = 0V, VCM = V+/2, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

PSRR+Positive Power Supply Rejection Ratio 2.4V ≤ V+ ≤ 7V, VCM = 0V 65 80 dB

PSRR–Negative Power Supply Rejection Ratio –7V ≤ V– ≤ 0V, V+ = 5V, VCM = 5V 65 80 dB

A

V

V

OH

V

OL

+

I

–

I

V

IH

V

IL

I

IL

t

PD

∆t

PD

t

r

t

f

t

LPD

t

SU

t

H

t

DPW

f

MAX

t

JITTER

Small-Signal Voltage Gain (Note 10) 1.5 3 V/mV
Output Voltage Swing HIGH I

Output Voltage Swing LOW I

Positive Supply Current (Per Comparator) V+ = 5V, V

Negative Supply Current (Per Comparator) V+ = 5V, V

Latch Pin High Input Voltage ● 2.4 V
Latch Pin Low Input Voltage ● 0.8 V
Latch Pin Current V
Propagation Delay (Note 6) ∆VIN = 100mV, V

Differential Propagation Delay (Note 6) ∆VIN = 100mV, V
Output Rise Time 10% to 90% 4 ns
Output Fall Time 90% to 10% 4 ns
Latch Propagation Delay (Note 7) 8ns
Latch Setup Time (Note 7) 1.5 ns
Latch Hold Time (Note 7) 0ns
Minimum Latch Disable Pulse Width (Note 7) 8 ns
Maximum Toggle Frequency VIN = 100mV
Output Timing Jitter VIN = 630mV

LATCH

= 0.8V, C

I

I

∆V
∆V

LOAD

= 1mA, V+ = 5V, V

OUT

= 10mA, V+ = 5V, V

OUT

= –1mA, V

OUT

= –10mA, V

OUT

= V

LATCH

= 100mV, V

IN

= 100mV, V

IN

= 10pF, V

OVERDRIVE

OVERDRIVE

OVERDRIVE

OVERDRIVE

+

OVERDRIVE
OVERDRIVE
OVERDRIVE

OVERDRIVE

Sine Wave 65 MHz

P-P

(0dBm) Sine Wave, f = 30MHz 15 ps

P-P

OVERDRIVE

OVERDRIVE

OVERDRIVE

= 50mV ● 0.20 0.4 V

= 50mV ● 0.35 0.5 V

= 1V 5 6.5 mA

= 1V 3 4.0 mA

= 20mV 8.0 11.0 ns
= 20mV ● 12.5 ns
= 5mV 9.0 ns

= 20mV 0.5 3 ns

= 20mV, unless otherwise specified.

● 60 dB

● 60 dB

= 50mV ● V+ – 0.5 V+ – 0.2 V

= 50mV ● V+ – 0.7 V+ – 0.4 V

● 8.0 mA

● 4.5 mA

● 10 µA

RMS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V+ = 5V, V– = –5V, VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

+

V

–

V
V

OS

∆VOS/∆T Input Offset Voltage Drift ● 5 µV/°C
I

OS

I

B

Positive Supply Voltage Range ● 2.4 7 V
Negative Supply Voltage Range (Note 3) ● –7 0 V
Input Offset Voltage (Note 4) RS = 50Ω, VCM = 0V 0.5 3 mV

Input Offset Current 0.1 1 µA

Input Bias Current (Note 5) –7 –1.5 2 µA

LATCH

= 0.8V, C

= 10pF, V

LOAD

R

S

R

S

R

S

OVERDRIVE

= 50Ω, VCM = 0V ● 4mV
= 50Ω, VCM = –5V 0.7 mV
= 50Ω, VCM = 5V 1 mV

= 20mV, unless otherwise specified.

● 2 µA

● –15 5 µA

3

LT1713/LT1714

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V+ = 5V, V– = –5V, VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

CM

CMRR Common Mode Rejection Ratio –5V ≤ VCM ≤ 5V 62 70 dB

PSRR+Positive Power Supply Rejection Ratio 2.4V ≤ V+ ≤ 7V, VCM = –5V 68 80 dB

PSRR–Negative Power Supply Rejection Ratio –7V ≤ V– ≤ 0V, VCM = 5V 65 80 dB

A

V

V

OH

V

OL

+

I

–

I

V

IH

V

IL

I

IL

t

PD

∆t

PD

t

r

t

f

t

LPD

t

SU

t

H

t

DPW

f

MAX

t

JITTER

Input Voltage Range ● –5.1 5.1 V

Small-Signal Voltage Gain (Note 10) 1V ≤ V
Output Voltage Swing HIGH (Note 8) I

Output Voltage Swing LOW (Note 8) I

Positive Supply Current (Per Comparator) V

Negative Supply Current (Per Comparator) V

Latch Pin High Input Voltage ● 2.4 V
Latch Pin Low Input Voltage ● 0.8 V
Latch Pin Current V
Propagation Delay (Note 6) ∆VIN = 100mV, V

Differential Propagation Delay (Note 6) ∆VIN = 100mV, V
Output Rise Time 10% to 90% 4 ns
Output Fall Time 90% to 10% 4 ns
Latch Propagation Delay (Note 7) 8ns
Latch Setup Time (Note 7) 1.5 ns
Latch Hold Time (Note 7) 0ns
Minimum Latch Disable Pulse Width (Note 7) 8 ns
Maximum Toggle Frequency VIN = 100mV
Output Timing Jitter VIN = 630mV

LATCH

= 0.8V, C

LOAD

= 10pF, V

OUT

= 1mA, V

OUT

I

= 10mA, V

OUT

= –1mA, V

OUT

I

= –10mA, V

OUT

OVERDRIVE

OVERDRIVE

= V

LATCH

∆V

= 100mV, V

IN

∆V

= 100mV, V

IN

OVERDRIVE

= 20mV, unless otherwise specified.

● 60 dB

● 65 dB

● 60 dB

≤ 4V, RL = ∞ 1.5 3 V/mV

OVERDRIVE

= 50mV ● 4.5 4.8 V

OVERDRIVE

OVERDRIVE

= 50mV ● 4.3 4.6 V

= 50mV ● 0.20 0.4 V

OVERDRIVE

= 50mV ● 0.35 0.5 V

= 1V 5.5 7.5 mA

● 9.0 mA

= 1V 3.5 4.5 mA

● 5.0 mA

+

OVERDRIVE
OVERDRIVE
OVERDRIVE

OVERDRIVE

Sine Wave 65 MHz

P-P

(0dBm) Sine Wave, f = 30MHz 15 ps

P-P

= 20mV 7 10 ns
= 20mV ● 12 ns
= 5mV 8.5 ns

= 20mV 0.5 3 ns

● 10 µA

RMS

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: The LT1713C/LT1714C are guaranteed to meet specified
performance from 0°C to 70°C. They are designed, characterized and
expected to meet specified performance from –40°C to 85°C but are not
tested or QA sampled at these temperatures. The LT1713I/LT1714I are
guaranteed to meet specified performance from –40°C to 85°C.

Note 3: The negative supply should not be greater than the ground pin
voltages and the maximum voltage across the positive and negative
supplies should not be greater than 12V.

Note 4: Input offset voltage (V

) is defined as the average of the two

OS

voltages measured by forcing first one output, then the other to V+/2.
Note 5: Input bias current (I

) is defined as the average of the two input

B

currents.

4

Note 6: Propagation delay (t
the actual VOS. Differential propagation delay is defined as:
∆tPD = t

PD

+

–

– t

. Load capacitance is 10pF. Due to test system

PD

) is measured with the overdrive added to

PD

requirements, the LT1713/LT1714 propagation delay is specified with a
1kΩ load to ground for ±5V supplies, or to mid-supply for 2.7V or 5V
single supplies.

Note 7: Latch propagation delay (t

) is the delay time for the output to

LPD

respond when the latch pin is deasserted. Latch setup time (tSU) is the
interval in which the input signal must remain stable prior to asserting the
latch signal. Latch hold time (tH) is the interval after the latch is asserted in
which the input signal must remain stable. Latch disable pulse width
(t

) is the width of the negative pulse on the latch enable pin that

DPW

latches in new data on the data inputs.

ELECTRICAL CHARACTERISTICS

LT1713/LT1714

Note 8: Output voltage swings are characterized and tested at V+ = 5V and
V– = 0V. They are designed and expected to meet these same
specifications at V– = –5V.

Note 9: The input voltage range is tested under the more demanding
conditions of V

+

= 5V and V– = –5V. The LT1713/LT1714 are designed

Note 10: The LT1713/LT1714 voltage gain is tested at V+ = 5V and
V– = –5V only. Voltage gain at single supply V+ = 5V and V+ = 2.7V is
guaranteed by design and correlation.

Note 11: Input offset voltage over temperature at V
by design and characterization.

and expected to meet these specifications at V– = 0V.

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Input Offset Voltage
vs Temperature

2.5
V+ = 5V

–

2.0

V

= 0V

= 2.5V

V

CM

1.5

1.0

0.5

0
–0.5
–1.0
–1.5

INPUT OFFSET VOLTAGE (mV)

–2.0
–2.5

–50

0

–25

TEMPERATURE (°C)

25

50

75

100

171314 G01

125

Propagation Delay
vs Load Capacitance

14

12

10

8

6

TA = 25°C

+

= 5V

V

4

–

V

PROPAGATION DELAY (ns)

= 0V

= 2.5V

V

CM

2

= 20mV

V

OD

= 100mV

V

STEP

0

0 60 100

20

LOAD CAPACITANCE (pF)

t

PD

t

40

+

–

PD

80 120

171314 G02

Propagation Delay
vs Temperature

16

V+ = 5V

–

V

= 0V

14

= 2.5V

V

CM

= 20mV

V

OD

12

10

PROPAGATION DELAY (ns)

= 100mV

V

STEP

= 10pF

C

LOAD

8

6

4

2

0

–25 25 75 125

–50

050

TEMPERATURE (°C)

+

= 2.7V is guaranteed

+

t

PD

–

t

PD

100

171314 G03

Propagation Delay
vs Input Common Mode Voltage

10.0

9.5

9.0

8.5

8.0

7.5

7.0

PROPAGATION DELAY (ns)

6.5

6.0

0.5 1.5 3.5

–0.5

INPUT COMMON MODE (V)

+

t

PD

–

t

PD

2.5

TA = 25°C

+

V

= 5V

–

= 0V

V
V

= 20mV

OD

V

= 100mV

STEP

= 10pF

C

LOAD

4.5

171314 G04

5.5

Propagation Delay
vs Positive Supply Voltage

10.0
TA = 25°C

–

V

= 0V

9.5
= 2.5V

V

CM

V

= 20mV

OD

9.0

V

= 100mV

STEP

= 10pF

C

LOAD

8.5

8.0

7.5

7.0

PROPAGATION DELAY (ns)

6.5

6.0
24 8

0

POSITIVE SUPPLY VOLTAGE (V)

6

+

t

PD

–

t

PD

10 12 14

171314 G05

Positive Supply Current
vs Positive Supply Voltage

7.0
TA = 25°C

= 100mV

∆V

IN

6.5

I

= 0

OUT

V– = –5V

6.0

5.5

5.0

4.5

4.0

2

POSITIVE SUPPLY CURRENT (PER COMPARATOR) (mA)

4

POSITIVE SUPPLY VOLTAGE (V)

V– = 0V

6810

171314 G06

12

5

LT1713/LT1714

LOADING SINK CURRENT (mA)

0.01

0

OUTPUT VOLTAGE (V)

0.1

0.3

0.4

0.5

1.0

0.7

1

171314 G12

0.2

0.8

0.9

0.6

0.1

10

TA = 25°C
V

+

= 5V

V

–

= 0V

∆V

IN

= 100mV

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Positive Supply Current
vs Switching Frequency

40

TA = 25°C

+

= 5V

V

35

–

V

= 0V

= 10pF

C

LOAD

30

25

20

15

10

5

0

0

POSITIVE SUPPLY CURRENT (PER COMPARATOR) (mA)

10

SWITCHING FREQUENCY (MHz)

20

30

40

171314 G07

Input Bias Current
vs Temperature

0

V+ = 5V

–

V

= 0V

= 2.5V

V

CM

–1

–2

–3

INPUT BIAS CURRENT (µA)

–4

–25 25 75 125

–50

050

TEMPERATURE (°C)

100

171314 G10

Negative Supply Current
vs Negative Supply Voltage

4.0
TA = 25°C

3.8

∆V

= 100mV

IN

= 0

I

OUT

3.6

3.4

3.2

3.0

2.8

2.6

2.4

2.2

2.0

0

NEGATIVE SUPPLY CURRENT (PER COMPARATOR) (mA)

–2

–1

NEGATIVE SUPPLY VOLTAGE (V)

V+ = 5V

V+ = 2.7V

–4

–3

–5

–6

171314 G08

–7

Output High Voltage
vs Source Current

5.0

4.9

4.8

4.7

(V)

4.6

4.5

4.4

4.3

OUTPUT VOLTAGE

TA = 25°C

4.2

+

V

= 5V

–

V

= 0V

4.1
= 100mV

∆V

IN

4.0

0.01

0.1

LOADING SOURCE CURRENT (mA)

1

10

171314 G11

Input Bias Current
vs Input Common Mode Voltage

3

TA = 25°C

+

= 5V

V

2

–

= 0V

V

1

= 0mV

∆V

IN

0

–1

–2

–3

–4

INPUT BIAS CURRENT (µA)

–5

–6

–1

1026

INPUT COMMON MODE VOLTAGE (V)

345

Output Low Voltage
vs Sink Current

171314 G09

200
180

)

160

RMS

140

120

100

80
60
40

OUTPUT TIMING JITTER (ps

20

6

Output Timing Jitter
vs Switching Frequency

TA = 25°C
V
V
V
V
(0dBm) SINE WAVE

0

0

20

40

FREQUENCY (MHz)

+

= 5V

–

= 0V

= 2.5V

CM

= 630mV

IN

Output Rising Edge, 5V Supply

V

IN

P-P

V

OUT

171314 G14 171314 G15

60

80

171314 G13

Output Falling Edge, 5V Supply

V

IN

V

OUT