Linear Technology LT1809 Datasheet

FEATURES

Final Electrical Specifications

FREQUENCY (Hz)

10k 100k 1M 10M 100M

GAIN (dB)

1809 TA01a

10

0
–10
–20
–30
–40
–50
–60
–70
–80
–90

VS = 3V, 0V
V

IN

= 2.5V

P-P

LT1809

180MHz, 350V/µs

Rail-to-Rail Input and Output

Low Distortion Op Amp

January 2000

U

DESCRIPTIO

■

–3dB Bandwidth: 320MHz, AV = 1

■

Gain-Bandwidth Product: 180MHz, AV ≥ 10

■

Slew Rate: 350V/µs

■

Wide Supply Range: 2.5V to 12.6V

■

Large Output Current: 85mA

■

Low Distortion, 5MHz: –90dBc

■

Input Common Mode Range Includes Both Rails

■

Output Swings Rail-to-Rail

■

Input Offset Voltage, Rail-to-Rail: 2.5mV Max

■

Common Mode Rejection: 89dB Typ

■

Power Supply Rejection: 87dB Typ

■

Open-Loop Gain: 100V/mV Typ

■

Shutdown Pin

■

8-Pin SO-8 Package

■

Operating Temperature Range –40°C to 85°C

U

APPLICATIO S

■

Active Filters

■

Rail-to-Rail Buffer Amplifiers

■

Driving A/D Converters

■

Low Voltage Signal Processing

■

Video Line Driver

The LT®1809 is a low distortion rail-to-rail input and
output op amp with a 350V/µs slew rate. The amplifier has
a –3dB bandwidth of 320MHz at unity-gain, a gain-band­width product of 180MHz (AV ≥ 10) and an 85mA output
current to fit the needs of low voltage, high performance
signal conditioning systems.

The LT1809 has an input range that includes both supply
rails and an output that swings within 20mV of either
supply rail to maximize the signal dynamic range in low
supply applications.

The LT1809 has very low distortion (–90dBc) up to 5MHz
that allows it to be used in high performance data acqui­sition systems.

The LT1809 maintains its performance for supplies from

2.5V to 12.6V and is specified at 3V, 5V and ±5V supplies.
The inputs can be driven beyond the supplies without
damage or phase reversal of the output.

The LT1809 is available in the 8-pin SO package with the
standard op amp pinout. This device can be used as a plug­in replacement for many op amps to improve input/output
range and performance.

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

TYPICAL APPLICATIO

Single 3V Supply, 4MHz, 4th Order Butterworth Filter

V

232Ω

IN

665Ω

220pF

–

+

V

S

2

232Ω

47pF

LT1809

U

Filter Frequency Response

274Ω

22pF

274Ω

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen­tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

562Ω

470pF

–

LT1809

+

V

OUT

1809 TA01

1

LT1809

WW

W

ABSOLUTE AXI U RATI GS

U

UUW

PACKAGE/ORDER I FOR ATIO

(Note 1)

Total Supply Voltage (V+ to V–) ........................... 12.6V

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

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

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

Operating Temperature Range (Note 4) .. –40°C to 85°C
Specified Temperature Range (Note 5)... –40°C to 85°C

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

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

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

TOP VIEW

SHDN

S

1

–IN

2

+IN

3

–

V

4

S8 PACKAGE

8-LEAD PLASTIC SO

T

= 150°C, θJA = 190°C/W

JMAX

8

NC

+

V

7

OUT

6

NC

5

ORDER PART

NUMBER

LT1809CS8
LT1809IS8

S8 PART

MARKING

1809
1809I

Consult factory for Military grade parts.

ELECTRICAL CHARACTERISTICS

TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

∆V
I

B

∆I

B

I

OS

∆I

OS

e

n

i

n

C

IN

A

VOL

CMRR Common Mode Rejection Ratio VS = 5V, V

PSRR Power Supply Rejection Ratio VS = 2.5V to 10V, V

Input Offset Voltage VCM = V

Input Offset Shift VCM = V– to V

OS

Input Bias Current VCM = V

Input Bias Current Shift VCM = V– to V
Input Offset Current VCM = V

Input Offset Current Shift VCM = V– to V
Input Noise Voltage Density f = 10kHz 16 nV/√Hz
Input Noise Current Density f = 10kHz 5 pA/√Hz
Input Capacitance 2pF
Large-Signal Voltage Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k 35 90 V/mV

Input Common Mode Range V

Minimum Supply Voltage (Note 6) 2.3 2.5 V

= open; VCM = V

SHDN

= half supply unless otherwise noted.

OUT

+
–

= V

V

CM

= V

V

CM

V

= V

CM

V

= 5V, VO = 1V to 4V, RL = 100Ω 4.5 10 V/mV

S

= 3V, VO = 0.5V to 2.5V, RL = 1k 22 42 V/mV

V

S

= 3V, V

V

S

+
–

+
–

= V– to V

CM

= V– to V

CM

+

–27.5 –13 µA

+

+

+
+

= 0V 73 87 dB

CM

69 82 dB
64 78 dB

0.6 2.5 mV

0.6 2.5 mV

0.3 1.75 mV

1.8 8 µA

11.8 35.5 µA

0.05 1.2 µA

0.2 4 µA

0.25 5.2 µA

–

+

V

V

2

LT1809

ELECTRICAL CHARACTERISTICS

TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OL

V

OH

I

SC

I

S

GBW Gain-Bandwidth Product Frequency = 2MHz 160 MHz
SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V
THD Total Harmonic Distortion VS = 5V, AV = 1, RL = 1k, VO = 2V
t

S

∆G Differential Gain (NTSC) VS = 5V, AV = 2, RL = 150Ω 0.015 %
∆θ Differential Phase (NTSC) 0.05 %

Output Voltage Swing LOW (Note 7) No Load 6 20 mV

Output Voltage Swing HIGH (Note 7) No Load 17 40 mV

Short-Circuit Current VS = 5V ±50 ±85 mA

Supply Current 12.5 17 mA
Disable Supply Current VS = 5V, V

Settling Time 0.01%, VS = 5V, V

= open; VCM = V

SHDN

= half supply unless otherwise noted.

OUT

I

= 5mA 40 80 mV

SINK

= 25mA 150 300 mV

I

SINK

= 5mA 80 160 mV

I

SOURCE

I

= 25mA 300 500 mV

SOURCE

= 3V ±40 ±70 mA

V

S

= 0V 0.55 0.8 mA

SHDN

= 3V, V

V

S

= 0V 0.31 0.5 mA

SHDN

P-P

, fC = 5MHz –86 dB

P-P

= 2V, AV = 1, RL = 1k 40 ns

STEP

300 V/µs

The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; V
VCM = V

= half supply unless otherwise noted.

OUT

SHDN

= open;

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage VCM = V

VOS TC Input Offset Voltage Drift (Note 8) VCM = V

∆V
I

∆I
I

∆I
A

B

B

OS

OS

VOL

Input Offset Voltage Shift VCM = V

OS

Input Bias Current VCM = V+ – 0.1V ● 210 µA

Input Bias Current Shift VCM = V
Input Offset Current VCM = V+ – 0.1V ● 0.05 1.5 µA

Input Offset Current Shift VCM = V
Large-Signal Voltage Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k ● 25 80 V/mV

CMRR Common Mode Rejection Ratio VS = 5V, VCM = V

Input Common Mode Range ● V

PSRR Power Supply Rejection Ratio VS = 2.5V to 10V, V

+
–

= V

V

CM

+
–

V

= V

CM

–

+

to V

–

V

= V

+ 0.2V ● –30 –14 µA

CM

–

+ 0.2V to V+ – 0.1V ● 12 40 µA

–

= V

V

V
V

V

+ 0.2V ● 0.40 4.5 µA

CM

–

+ 0.2V to V+ – 0.1V ● 0.45 6 µA

= 5V, VO = 1V to 4V, RL = 100Ω ● 3.5 8.5 V/mV

S

= 3V, VO = 0.5V to 2.5V, RL = 1k ● 16 40 V/mV

S

= 3V, VCM = V

S

–

+

to V

–

+

to V

= 0V ● 71 83 dB

CM

● 13 mV

● 13 mV

● 925µV/°C

● 925µV/°C

● 0.5 2 mV

● 67.5 80 dB

● 63.5 75 dB

–

+

V

Minimum Supply Voltage (Note 6) ● 2.3 2.5 V

V

OL

Output Voltage Swing LOW (Note 7) No Load ● 825 mV

I

= 5mA ● 40 80 mV

SINK

= 25mA ● 160 320 mV

I

SINK

V

3