6

LT1220

f = 5MHz

LT1220 • TPC19

f = 2MHz

LT1220 • TPC20

LT1220 • TPC21

f = 20kHz

f = 5MHz

LT1220 • TPC22

f = 2MHz

LT1220 • TPC23

LT1220 • TPC24

f = 200kHz

The LT1220 may be inserted directly into HA2505/15/25,

HA2541/2/4, AD817, AD847, EL2020, EL2044 and LM6361

applications, provided that the nulling circuitry is removed.

The suggested nulling circuit for the LT1220 is shown in

the following figure.

Layout and Passive Components

The LT1220 amplifier is easy to apply and tolerant of less

than ideal layouts. For maximum performance (for ex-

ample, fast settling time) use a ground plane, short lead

lengths and RF-quality bypass capacitors (0.01

µFto0.1µF).

For high driver current applications use low ESR bypass

capacitors (1

µF to 10µF tantalum). Sockets should be

avoided when maximum frequency performance is re-

quired, although low profile sockets can provide reason-

able performance up to 50MHz. For more details see

Design Note 50. Feedback resistors greater than 5k are not

recommended because a pole is formed with the input

capacitance which can cause peaking or oscillations.

Offset Nulling

LT1220 • AI01

0.1

µF

0.1

µF

5k

3

2

4

7

6

8

1

LT1220

+

–