LTC6409CUDB#TRPBF Datasheet LTC6409CUDB#TRMPBF, LTC6409IUDB#TRMPBF, LTC6409CUDB#TRPBF | P4-P6

LTC6409

4

6409fa

elecTrical characTerisTics

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

SR Slew Rate Differential Output, V

OUTDIFF

= 4V

P-P

+OUT Rising (–OUT Falling)

+OUT Falling (–OUT Rising)

3300

1720

1580

V/µs

GBW Gain-Bandwidth Product R

I

= 25Ω, R

F

= 10kΩ, f

TEST

= 100MHz

l

9.5

8

10 GHz

GHz

f

–3dB

–3dB Frequency R

I

= R

F

= 150Ω, R

LOAD

= 400Ω, C

F

= 1.3pF 2 GHz

f

0.1dB

Frequency for 0.1dB Flatness R

I

= R

F

= 150Ω, R

LOAD

= 400Ω , C

F

= 1.3pF 600 MHz

FPBW Full Power Bandwidth V

OUTDIFF

= 2V

P-P

550 MHz

HD2

HD3

25MHz Distortion Differential Input, V

OUTDIFF

= 2V

P-P

,

R

I

= R

F

= 150Ω, R

LOAD

= 400Ω

2nd Harmonic

3rd Harmonic

–104

–106

dBc

100MHz Distortion Differential Input, V

OUTDIFF

= 2V

P-P

,

R

I

= R

F

= 150Ω, R

LOAD

= 400Ω

2nd Harmonic

3rd Harmonic

–93

–88

dBc

HD2

HD3

25MHz Distortion Single-Ended Input, V

OUTDIFF

= 2V

P-P

,

R

I

= R

F

= 150Ω, R

LOAD

= 400Ω

2nd Harmonic

3rd Harmonic

–101

–103

dBc

100MHz Distortion Single-Ended Input, V

OUTDIFF

= 2V

P-P

,

R

I

= R

F

= 150Ω, R

LOAD

= 400Ω

2nd Harmonic

3rd Harmonic

–88

–93

dBc

IMD3 3rd Order IMD at 25MHz

f1 = 24.9MHz, f2 = 25.1MHz

V

OUTDIFF

= 2V

P-P

Envelope, R

I

= R

F

= 150Ω,

R

LOAD

= 400Ω

–110 dBc

3rd Order IMD at 100MHz

f1 = 99.9MHz, f2 = 100.1MHz

V

OUTDIFF

= 2V

P-P

Envelope, R

I

= R

F

= 150Ω,

R

LOAD

= 400Ω

–98 dBc

3rd Order IMD at 140MHz

f1 = 139.9MHz, f2 = 140.1MHz

V

OUTDIFF

= 2V

P-P

Envelope, R

I

= R

F

= 150Ω,

R

LOAD

= 400Ω

–88 dBc

OIP3 Equivalent OIP3 at 25MHz (Note 12)

Equivalent OIP3 at 100MHz (Note 12)

Equivalent OIP3 at 140MHz (Note 12)

59

53

48

dBm

t

S

Settling Time V

OUTDIFF

= 2V

P-P

Step, R

I

= R

F

= 150Ω,

R

LOAD

= 400Ω

1% Settling

1.9

ns

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. V

+

= 5V, V

–

= 0V, V

CM

= V

OCM

= V

ICM

= 1.25V, V

SHDN

= open. V

S

is

defined as (V

+

– V

–

). V

OUTCM

is defined as (V

+OUT

+ V

–OUT

)/2. V

ICM

is defined as (V

+IN

+ V

–IN

)/2. V

OUTDIFF

is defined as (V

+OUT

– V

–OUT

).

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Input pins (+IN, –IN, V

OCM

, and SHDN) are protected by steering

diodes to either supply. If the inputs should exceed either supply voltage,

the input current should be limited to less than 10mA. In addition, the

inputs +IN, –IN are protected by a pair of back-to-back diodes. If the

differential input voltage exceeds 1.4V, the input current should be limited

to less than 10mA.

Note 3: A heat sink may be required to keep the junction temperature

below the absolute maximum rating when the output is shorted

indefinitely.

Note 4: The LTC6409C/LTC6409I are guaranteed functional over the

temperature range of –40°C to 85°C. The LTC6409H is guaranteed

functional over the temperature range of –40°C to 125°C.

Note 5: The LTC6409C is guaranteed to meet specified performance from

0°C to 70°C. The LTC6409C is designed, characterized and expected to

meet specified performance from –40°C to 85°C, but is not tested or

QA sampled at these temperatures. The LTC6409I is guaranteed to meet

specified performance from –40°C to 85°C. The LTC6409H is guaranteed

to meet specified performance from –40°C to 125°C.

Note 6: Input bias current is defined as the average of the input currents

flowing into the inputs (–IN and +IN). Input offset current is defined as the

difference between the input currents (I

OS

= I

B

+

– I

B

–

).

LTC6409

5

6409fa

Typical perForMance characTerisTics

Supply Current vs Supply Voltage Supply Current vs SHDN Voltage

Shutdown Supply Current vs

Supply Voltage

Differential Input Offset Voltage

vs Temperature

Differential Input Offset Voltage

vs Input Common Mode Voltage

Common Mode Offset Voltage

vs Temperature

elecTrical characTerisTics

Note 7: Input common mode range is tested by testing at both V

ICM

= 1.25V

and at the Electrical Characteristics table limits to verify that the differential

offset (V

OSDIFF

) and the common mode offset (V

OSCM

) have not deviated by

more than ±1mV and ±2mV respectively from the V

ICM

= 1.25V case.

The voltage range for the output common mode range is tested by

applying a voltage on the V

OCM

pin and testing at both V

OCM

= 1.25V and

at the Electrical Characteristics table limits to verify that the common

mode offset (V

OSCM

) has not deviated by more than ±6mV from the

V

OCM

= 1.25V case.

Note 8: Input CMRR is defined as the ratio of the change in the input

common mode voltage at the pins +IN or –IN to the change in differential

input referred offset voltage. Output CMRR is defined as the ratio of

the change in the voltage at the V

OCM

pin to the change in differential

input referred offset voltage. This specification is strongly dependent on

feedback ratio matching between the two outputs and their respective

inputs and it is difficult to measure actual amplifier performance (See

Effects of Resistor Pair Mismatch in the Applications Information section

of this data sheet). For a better indicator of actual amplifier performance

independent of feedback component matching, refer to the PSRR

specification.

Note 9: Differential power supply rejection (PSRR) is defined as the ratio

of the change in supply voltage to the change in differential input referred

offset voltage. Common mode power supply rejection (PSRRCM) is

defined as the ratio of the change in supply voltage to the change in the

output common mode offset voltage.

Note 10: Supply voltage range is guaranteed by power supply rejection

ratio test.

Note 11: Extended operation with the output shorted may cause the

junction temperature to exceed the 150°C limit.

Note 12: Refer to Relationship Between Different Linearity Metrics in the

Applications Information section of this data sheet for information on how

to calculate an equivalent OIP3 from IMD3 measurements.

TEMPERATURE (°C)

6409 G01

DIFFERENTIAL V

OS

(mV)

V

S

= 5V

V

OCM

= V

ICM

= 1.25V

R

I

= R

F

= 150Ω

FIVE REPRESENTATIVE UNITS

–50 50 125100–25 0 25 75

1.5

1.0

0.5

0

–0.5

INPUT COMMON MODE VOLTAGE (V)

6409 G02

DIFFERENTIAL V

OS

(mV)

V

S

= 5V

V

OCM

= 1.25V

R

I

= R

F

= 150Ω

0.1% FEEDBACK NETWORK RESISTORS

REPRESENTATIVE UNIT

0 2 430.5 1 1.5 2.5 3.5

2.0

1.5

1.0

0.5

–0.5

0

–1.0

T

A

= 85°C

T

A

= 70°C

T

A

= 25°C

T

A

= 0°C

T

A

= –40°C

SUPPLY VOLTAGE (V)

6409 G04

TOTAL SUPPLY CURRENT (mA)

V

SHDN

= OPEN

0 2 5.53.530.5 1 1.5 2.5 4 54.5

60

20

15

25

30

35

40

45

50

55

10

5

0

T

A

= 125°C

T

A

= 85°C

T

A

= 70°C

T

A

= 25°C

T

A

= 0°C

T

A

= –40°C

SHDN VOLTAGE (V)

6409 G05

V

S

= 5V

TOTAL SUPPLY CURRENT (mA)

0 2 53.530.5 1 1.5 2.5 4 4.5

60

20

15

25

30

35

40

45

50

55

10

5

0

T

A

= 125°C

T

A

= 85°C

T

A

= 70°C

T

A

= 25°C

T

A

= 0°C

T

A

= –40°C

SUPPLY VOLTAGE (V)

6409 G06

SHUTDOWN SUPPLY CURRENT (µA)

V

SHDN

= V

–

0 2 5.53.530.5 1 1.5 2.5 4 54.5

140

120

100

80

60

20

40

0

T

A

= 125°C

T

A

= 85°C

T

A

= 70°C

T

A

= 25°C

T

A

= 0°C

T

A

= –40°C

TEMPERATURE (°C)

6409 G03

COMMON MODE OFFSET VOLTAGE (mV)

V

S

= 5V

V

OCM

= V

ICM

= 1.25V

R

I

= R

F

= 150Ω

FIVE REPRESENTATIVE UNITS

2.5

2.0

1.5

1.0

0.5

0

–0.5

–50 50 125100–25 0 25 75

LTC6409

6

6409fa

Typical perForMance characTerisTics

Large Signal Step Response

Overdriven Output Transient

Response

CMRR vs Frequency Differential PSRR vs Frequency Small Signal Step Response

Differential Output Voltage Noise

vs Frequency

Differential Output Impedance

vs Frequency

FREQUENCY (Hz)

VOLTAGE NOISE DENSITY (nV/√Hz)

1k 1G1M1

6409 G07

V

S

= 5V

R

I

= R

F

= 150Ω

INCLUDES R

I

/R

F

NOISE

1000

100

10

1

20ns/DIV

6409 G14

VOLTAGE (V)

4.0

0.5

3.5

2.5

1.5

3.0

2.0

1.0

0

+OUT

–OUT

V

S

= 5V

V

OCM

= 1.25V

R

LOAD

= 200Ω TO

GROUND PER

OUTPUT

FREQUENCY (MHz)

6409 G09

OUTPUT IMPEDANCE (Ω)

V

S

= 5V

R

I

= R

F

= 150Ω

1000

100

10

1

0.01

0.1

1 10010 1000 10000

FREQUENCY (MHz)

6409 G10

CMRR (dB)

V

S

= 5V

V

OCM

= 1.25V

R

I

= R

F

= 150Ω, C

F

= 1.3pF

0.1% FEEDBACK NETWORK

RESISTORS

100

90

80

70

60

50

1 10010 1000 10000

FREQUENCY (MHz)

6409 G11

PSRR (dB)

V

S

= 5V

90

80

70

60

50

10

30

20

40

2ns/DIV

6409 G12

20mV/DIV

+OUT

–OUT

V

S

= 5V

V

OCM

= V

ICM

= 1.25V

R

LOAD

= 400Ω

R

I

= R

F

= 150Ω, C

F

= 1.3pF

C

L

= 0pF

V

IN

= 200mV

P-P

, DIFFERENTIAL

0.2V/DIV

2ns/DIV

6409 G13

+OUT

–OUT

V

S

= 5V

R

LOAD

= 400Ω

V

IN

= 2V

P-P

, DIFFERENTIAL

Input Noise Density vs Frequency

FREQUENCY (Hz)

INPUT VOLTAGE NOISE DENSITY (nV/√Hz)

INPUT CURRENT NOISE DENSITY (pA/√Hz)

1k 1G1M1

6409 G18

i

n

e

n

V

S

= 5V

1000

100

10

1

1000

100

10

1

LTC6409CUDB#TRPBF

LTC6409CUDB#TRPBF

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