1

LT1464/LT1465

Dual/Quad Micropower,

1MHz C-Load Picoampere

Bias Current JFET Input Op Amps

–

+

13

4

15

14

2

3

5

1/4 LTC201

1/4 LTC201

16

5

6

1

A

IN

B

7

R1*

1/2 LT1464

+

–

2

3

1

1/2 LT1464

1

2

1

2

5

4

5

4

6

6

8

4

C1

10nF

POLYSTYRENE

TYPICAL DROOP =

= 0.05mV/s

TOTAL SUPPLY CURRENT = 460

µA MAX

* R1 = 600

Ω FOR ±15V SUPPLIES

R1 = 0

Ω FOR ±5V SUPPLIES

0.5pA

10nF

LT1464 • TA01

FUNCTION

MODE

IN A IN B

MODE IN A IN B

Track-and-Hold

Track

0

0

Hold

1

1

Positive Peak Detector Reset

0

0

Store

0

1

Negative Peak Detector Reset

0

0

Store

1

0

LTC201 switch is open for logic "1".

MCT2

MCT2

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

C-Load is a trademark of Linear Technology Corporation.

1464 • TA02

Micropower Low Droop Track-and-Hold/Peak Detector

s

Battery-Powered Systems

s

Photocurrent Amplifiers

s

Low Frequency, Micropower Active Filters

s

Low Droop Track-and-Hold Circuits

s

Input Bias Current:

2pA Max (LT1464A)

20pA Max (LT1464, LT1465)

s

Supply Current per Amplifier: 200

s

Gain Bandwidth Product: 1MHz Typ

s

Slew Rate: 0.9V/

µs Typ

s

Input Common Mode Range Includes Positive Rail

s

Unity-Gain Stable for C-Load

s

Open-Loop Gain: 1 Million Typ

s

Guaranteed Specs with

±5V, ±15V Supplies

s

Guaranteed Matching Specifications

s

Standard Pinout: SO-8, SO-14 Package

The LT

micropower op amps (200

µA max per amp) to offer

picoampere input bias currents (500fA typ) and unity-gain

stability for capacitive loads up to 10nF. The output can

swing a 10k load to within 1.5V of either supply, just like

op amps that require an order of magnitude more supply

current. This unique combination of performance makes

the LT1464/LT1465 ideal over a wide range of input and

output impedances.

In the design and testing of the LT1464/LT1465, particular

emphasis has been placed on optimizing performance in

the low cost SO-8 (dual) and 14-lead SO (quad) package for

±15V and ±5V supplies. The input common mode range

includes the positive rail. Slew rate (0.5V/

µs min) and gain

bandwidth product (650kHz min) are 100% tested. A full

set of matching specifications is also provided.

FEATURES