Linear Technology LT1399HV, LT1399, LT1398 Datasheet

FEATURES

■

300MHz Bandwidth on ±5V (A

■

0.1dB Gain Flatness: 150MHz (AV = 1, 2 and –1)

■

Completely Off in Shutdown, 0µA Supply Current

■

High Slew Rate: 800V/µs

■

Wide Supply Range:

= 1, 2 and –1)

V

±2V(4V) to ±6V(12V) (LT1398/LT1399)
±2V (4V) to ±7.5V (15V) (LT1399HV)

■

80mA Output Current

■

Low Supply Current: 4.6mA/Amplifier

■

Fast Turn-On Time: 30ns

■

Fast Turn-Off Time: 40ns

■

16-Pin Narrow SO/Narrow SSOP Packages

U

APPLICATIO S

LT1398/LT1399/LT1399HV

Low Cost Dual and Triple

300MHz Current Feedback

Amplifiers with Shutdown

U

DESCRIPTIO

The LT®1399 and LT1399HV contain three independent
300MHz current feedback amplifiers, each with a shut­down pin. The LT1399HV is a higher voltage version of the
LT1399. The LT1398 is a two amplifier version of the
LT1399.

The LT1398/LT1399 operate on all supplies from a single
4V to ±6V. The LT1399HV operates on all supplies from 4V
to ±7.5V.

Each amplifier draws 4.6mA when active. When disabled
each amplifier draws zero supply current and its output be­comes high impedance. The amplifiers turn on in only 30ns
and turn off in 40ns, making them ideal in spread spectrum
and portable equipment applications.

■

RGB Cable Drivers

■

LCD Drivers

■

Spread Spectrum Amplifiers

■

MUX Amplifiers

■

Composite Video Cable Drivers

■

Portable Equipment

TYPICAL APPLICATIO

3-Input Video MUX Cable Driver

CHANNEL

A

V

IN A

R

G

200Ω

V

IN B

R

G

200Ω

V

IN C

R

G

200Ω

EN A

+

1/3 LT1399

–

EN B

+

1/3 LT1399

–

EN C

+

1/3 LT1399

–

324Ω

324Ω

324Ω

SELECT

R

F

R

F

R

F

BC

97.6Ω

97.6Ω

97.6Ω

U

1399 TA01

75Ω

75Ω
CABLE

The LT1398/LT1399/LT1399HV are manufactured on Lin­ear Technology’s proprietary complementary bipolar pro­cess. The LT1399/LT1399HV are pin-for-pin upgrades to
the LT1260 optimized for use on ±5V/±7.5V supplies.

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

Square Wave Response

V

OUT

OUTPUT

200mV/DIV

RL = 100Ω

= RG = 324Ω

R

F

f = 10MHz

TIME (10ns/DIV)

1398/99 TA02

1

LT1398/LT1399/LT1399HV

W

O

A

LUTEXI TIS

S

Total Supply Voltage (V+ to V–)

LT1398/LT1399 ................................................ 12.6V

LT1399HV ....................................................... 15.5V

Input Current (Note 2) ....................................... ±10mA

Output Current................................................. ±100mA

Differential Input Voltage (Note 2) ........................... ±5V

PACKAGE

1

–IN A

2

+IN A

3

*GND

4

*GND

5

*GND

6

*GND

7

+IN B

8

–IN B

16-LEAD PLASTIC SO

T

= 150°C, θJA = 100°C/W

JMAX

*Ground pins are not internally connected. For best channel isolation, connect to ground. Consult factory for Industrial and Military grade parts.

A

/

O

RDER I FOR ATIO

TOP VIEW

A

B

S PACKAGE

16
15
14
13
12
11
10

9

WUW

EN A
OUT A

+

V
GND*
GND*

–

V
OUT B
EN B

U

ARB

G

WU

ORDER PART

NUMBER

LT1398CS

(Note 1)

Output Short-Circuit Duration (Note 3)........ Continuous

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

Specified Temperature Range (Note 4).. –40°C to 85°C

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

Junction Temperature (Note 5)............................ 150°C

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

U

TOP VIEW

1

–IN R

2

+IN R

3

*GND

4

–IN G

5

+IN G

6

*GND

7

+IN B

8

–IN B

GN PACKAGE

16-LEAD PLASTIC SSOP

T

= 150°C, θJA = 120°C/W (GN)

JMAX

= 150°C, θJA = 100°C/W (S)

T

JMAX

R

G

B

16
15
14
13
12
11
10

9

S PACKAGE

16-LEAD PLASTIC SO

EN R
OUT R

+

V
EN G
OUT G

–

V
OUT B
EN B

ORDER PART

NUMBER

LT1399CGN
LT1399CS
LT1399HVCS

GN PART MARKING

1399

LECTRICAL C CHARA TERIST

E

(LT1398/LT1399)

ICS

The ● denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C.
For each amplifier: VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

∆VOS/∆T Input Offset Voltage Drift ● 15 µV/°C

+

I

IN

–

I

IN

e

n

+i

n

–i

n

R

IN

C

IN

C

OUT

V

INH

Input Offset Voltage 1.5 10 mV

Noninverting Input Current 10 25 µA

Inverting Input Current 10 50 µA

Input Noise Voltage Density f = 1kHz, RF = 1k, RG = 10Ω, RS = 0Ω 4.5 nV/√Hz
Noninverting Input Noise Current Density f = 1kHz 6 pA/√Hz
Inverting Input Noise Current Density f = 1kHz 25 pA/√Hz
Input Resistance VIN = ±3.5V ● 0.3 1 MΩ
Input Capacitance Amplifier Enabled 2.0 pF

Output Capacitance Amplifier Disabled 8.5 pF
Input Voltage Range, High VS = ±5V ● 3.5 4.0 V

= ±5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)

S

● 12 mV

● 30 µA

● 60 µA

Amplifier Disabled 2.5 pF

V

= 5V, 0V 4.0 V

S

2

LT1398/LT1399/LT1399HV

LECTRICAL C CHARA TERIST

E

(LT1398/LT1399)

ICS

The ● denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C.
For each amplifier: VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

INL

V

OUTH

V

OUTL

V

OUTH

V

OUTL

CMRR Common Mode Rejection Ratio VCM = ±3.5V ● 42 52 dB
–I

CMRR

PSRR Power Supply Rejection Ratio VS = ±2V to ±5V, EN = V
+I

PSRR

–I

PSRR

A

V

R

OL

I

OUT

I

S

I

EN

SR Slew Rate (Note 6) AV = 10, RL = 150Ω 500 800 V/µs
t

ON

t

OFF

tr, t

f

t

PD

os Small-Signal Overshoot RF = RG = 324Ω, RL = 100Ω, V
t

S

dG Differential Gain (Note 8) RF = RG = 324Ω, RL = 150Ω 0.13 %
dP Differential Phase (Note 8) RF = RG = 324Ω, RL = 150Ω 0.10 DEG

Input Voltage Range, Low VS = ±5V ● –3.5 –4.0 V

Maximum Output Voltage Swing, High VS = ±5V, RL = 100k 3.9 4.2 V

Maximum Output Voltage Swing, Low VS = ±5V, RL = 100k –3.9 – 4.2 V

Maximum Output Voltage Swing, High VS = ±5V, RL = 150Ω 3.4 3.6 V

Maximum Output Voltage Swing, Low VS = ±5V, RL = 150Ω –3.4 –3.6 V

Inverting Input Current VCM = ±3.5V 10 16 µA/V
Common Mode Rejection V

Noninverting Input Current VS = ±2V to ±5V, EN = V
Power Supply Rejection

Inverting Input Current VS = ±2V to ±5V, EN = V
Power Supply Rejection

Large-Signal Voltage Gain V
Transimpedance, ∆V
Maximum Output Current RL = 0Ω ● 80 mA
Supply Current per Amplifier V
Disable Supply Current per Amplifier EN Pin Voltage = 4.5V, RL = 150Ω ● 0.1 100 µA
Enable Pin Current 30 110 µA

Turn-On Delay Time (Note 7) RF = RG = 324Ω, RL = 100Ω 30 75 ns
Turn-Off Delay Time (Note 7) RF = RG = 324Ω, RL = 100Ω 40 100 ns
Small-Signal Rise and Fall Time RF = RG = 324Ω, RL = 100Ω, V
Propagation Delay RF = RG = 324Ω, RL = 100Ω, V

Settling Time 0.1%, AV = –1, RF = RG = 309Ω, RL = 150Ω 25 ns

= ±5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)

S

VS = 5V, 0V 1.0 V

V

= ±5V, RL = 100k ● 3.7 V

S

VS = 5V, 0V; RL = 100k 4.2 V

VS = ±5V, RL = 100k ● –3.7 V
V

= 5V, 0V; RL = 100k 0.8 V

S

VS = ±5V, RL = 150Ω ● 3.2 V
V

= 5V, 0V; RL = 150Ω 3.6 V

S

VS = ±5V, RL = 150Ω ● –3.2 V
V

= 5V, 0V; RL = 150Ω 0.6 V

S

= ±3.5V ● 22 µA/V

OUT

/∆I

CM

= ±2V, RL = 150Ω 50 65 dB

–

IN

OUT

V

= ±2V, RL = 150Ω 40 100 kΩ

OUT

= 0V ● 4.6 6.5 mA

OUT

–

–

–

= 1V

OUT

P-P

= 1V

OUT

P-P

= 1V

OUT

P-P

● 56 70 dB

12 µA/V

● 3 µA/V

● 27 µA/V

● 200 µA

1.3 ns

2.5 ns
10 %

3

LT1398/LT1399/LT1399HV

LECTRICAL C CHARA TERIST

E

ICS

(LT1399HV)

The ● denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C.
For each amplifier: VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

∆VOS/∆T Input Offset Voltage Drift ● 15 µV/°C

+

I

IN

–

I

IN

e

n

+i

n

–i

n

R

IN

C

IN

C

OUT

V

INH

V

INL

V

OUTH

V

OUTL

V

OUTH

V

OUTL

CMRR Common Mode Rejection Ratio VCM = ±6V ● 42 52 dB
–I

CMRR

PSRR Power Supply Rejection Ratio VS = ±2V to ±7.5V, EN = V
+I

PSRR

–I

PSRR

A

V

R

OL

I

OUT

I

S

I

EN

Input Offset Voltage 1.5 10 mV

Noninverting Input Current 10 25 µA

Inverting Input Current 10 50 µA

Input Noise Voltage Density f = 1kHz, RF = 1k, RG = 10Ω, RS = 0Ω, VS = ±5V 4.5 nV/√Hz
Noninverting Input Noise Current Density f = 1kHz, VS = ±5V 6 pA/√Hz
Inverting Input Noise Current Density f = 1kHz, VS = ±5V 25 pA/√Hz
Input Resistance VIN = ±6V ● 0.3 1 MΩ
Input Capacitance Amplifier Enabled 2.0 pF

Output Capacitance Amplifier Disabled 8.5 pF
Input Voltage Range, High VS = ±7.5V ● 6 6.5 V

Input Voltage Range, Low VS = ±7.5V ● –6 –6.5 V

Maximum Output Voltage Swing, High VS = ±7.5V, RL = 100k 6.4 6.7 V

Maximum Output Voltage Swing, Low VS = ±7.5V, RL = 100k –6.4 –6.7 V

Maximum Output Voltage Swing, High VS = ±7.5V, RL = 150Ω 5.4 5.8 V

Maximum Output Voltage Swing, Low VS = ±7.5V, RL = 150Ω – 5.4 –5.8 V

Inverting Input Current VCM = ±6V 10 16 µA/V
Common Mode Rejection V

Noninverting Input Current VS = ±2V to ±7.5V, EN = V
Power Supply Rejection

Inverting Input Current VS = ±2V to ±7.5V, EN = V
Power Supply Rejection

Large-Signal Voltage Gain V
Transimpedance, ∆V
Maximum Output Current RL = 0Ω ● 80 mA
Supply Current per Amplifier V
Disable Supply Current per Amplifier EN Pin Voltage = 7V, RL = 150Ω ● 0.1 100 µA
Enable Pin Current 30 110 µA

= ±7.5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)

S

Amplifier Disabled 2.5 pF

= 7.5V, 0V 6.5 V

V

S

VS = 7.5V, 0V 1.0 V

V

= ±7.5V, RL = 100k ● 6.1 V

S

VS = 7.5V, 0V; RL = 100k 6.7 V

VS = ±7.5V, RL = 100k ● –6.1 V
V

= 7.5V, 0V; RL = 100k 0.8 V

S

VS = ±7.5V, RL = 150Ω ● 5.1 V
V

= 7.5V, 0V; RL = 150Ω 5.8 V

S

VS = ±7.5V, RL = 150Ω ● – 5.1 V
V

= 7.5V, 0V; RL = 150Ω 0.6 V

S

= ±6V ● 22 µA/V

OUT

/∆I

CM

= ±4.5V, RL = 150Ω 50 65 dB

–

IN

OUT

V

= ±4.5V, RL = 150Ω 40 100 kΩ

OUT

= 0V ● 4.6 7 mA

OUT

–

–

–

● 12 mV

● 30 µA

● 60 µA

● 56 70 dB

12 µA/V

● 3 µA/V

● 27 µA/V

● 200 µA

4

LT1398/LT1399/LT1399HV

LECTRICAL C CHARA TERIST

E

ICS

(LT1399HV)

The ● denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C.
For each amplifier: VCM = 0V, V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

SR Slew Rate (Note 6) AV = 10, RL = 150Ω, VS = ±5V 500 800 V/µs
t

ON

t

OFF

tr, t

f

t

PD

os Small-Signal Overshoot RF = RG = 324Ω, RL = 100Ω, V

t

S

dG Differential Gain (Note 8) RF = RG = 324Ω, RL = 150Ω, VS = ±5V 0.13 %
dP Differential Phase (Note 8) RF = RG = 324Ω, RL = 150Ω, VS = ±5V 0.10 DEG

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

Note 2: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.

Note 3: A heat sink may be required depending on the power supply
voltage and how many amplifiers have their outputs short circuited.

Note 4: The LT1398/LT1399/LT1399HV are guaranteed to meet specified
performance from 0°C to 70°C and are designed, characterized and
expected to meet these extended temperature limits, but are not tested at
–40°C and 85°C. Guaranteed I grade parts are available, consult factory.

Note 5: TJ is calculated from the ambient temperature TA and the
power dissipation P

LT1398CS, LT1399CS, LT1399HVCS: T
LT1399CGN: T

Turn-On Delay Time (Note 7) RF = RG = 324Ω, RL = 100Ω, VS = ±5V 30 75 ns
Turn-Off Delay Time (Note 7) RF = RG = 324Ω, RL = 100Ω, VS = ±5V 40 100 ns
Small-Signal Rise and Fall Time RF = RG = 324Ω, RL = 100Ω, V

Propagation Delay RF = RG = 324Ω, RL = 100Ω, V

Settling Time 0.1%, AV = –1V, RF = RG = 309Ω, RL = 150Ω,25ns

according to the following formula:

D

= TA + (PD • 120°C/W)

J

= ±7.5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)

S

= 1V

, 1.3 ns

P-P

= 1V

, 2.5 ns

P-P

= 1V

,10%

P-P

= 0.5V. This specification is guaranteed by design

IN

V

= ±5V

S

VS = ±5V

V

= ±5V

S

V

= ±5V

S

= TA + (PD • 100°C/W)

J

OUT

OUT

OUT

Note 6: Slew rate is measured at ±2V on a ±3V output signal.
Note 7: Turn-on delay time (tON) is measured from control input to

appearance of 1V at the output, for V
time (t
the output for V
and characterization.

Note 8: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1°.
Ten identical amplifier stages were cascaded giving an effective
resolution of 0.01% and 0.01°.

) is measured from control input to appearance of 0.5V on

OFF

= 1V. Likewise, turn-off delay

IN

U

W

TYPICAL AC PERFOR A CE

SMALL SIGNAL SMALL SIGNAL SMALL SIGNAL

(V) A

V

S

±5 1 100 365 – 300 150 0.05
±5 2 100 324 324 300 150 0
±5 –1 100 309 309 300 150 0

V

R

(Ω)R

L

F

(Ω)R

(Ω) – 3dB BW (MHz) 0.1dB BW (MHz) PEAKING (dB)

G

5