LT1228

4

ELECTRICAL C

C

HARA TERISTICS

Transconductance Amplifier, Pins 1, 2, 3, 5.

CMRR

Common-Mode Rejection Ratio

60

100

dB

q

60

dB

60

100

dB

q

60

dB

PSRR

Power Supply Rejection Ratio

60

100

dB

q

60

dB

Transconductance

0.75

1.00

1.25

µA/mV

Transconductance Drift

q

–0.33

%/

°C

Maximum Output Current

q

70

100

130

µA

Output Leakage Current

0.3

3

µA

q

10

µA

Maximum Output Voltage Swing

q

±13

±14

V

q

±3

±4V

Output Resistance

q

28

M

Ω

q

28

M

Ω

Output Capacitance (Note 2)

6

pF

Supply Current, Both Amps

q

915

mA

THD

Total Harmonic Distortion

0.2

%

BW

Small-Signal Bandwidth

R1 = 50

80

MHz

Small-Signal Rise Time

R1 = 50

5

ns

Propagation Delay

R1 = 50

5

ns

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

range.

Note 1: A heat sink may be required depending on the power supply

voltage.

Note 2: This is the total capacitance at pin 1. It includes the input

capacitance of the current feedback amplifier and the output capacitance

of the transconductance amplifier.

Note 3: Slew rate is measured at

±5V on a ±10V output signal while

operating on

slew rate is much higher when the input is overdriven, see the applications

section.

Note 4: Rise time is measured from 10% to 90% on a

±500mV output

signal while operating on

guarantee the internal capacitances are correct and it makes automatic

testing practical.

Note 5: AC parameters are 100% tested on the ceramic and plastic DIP

packaged parts (J and N suffix) and are sample tested on every lot of

the SO packaged parts (S suffix).

Note 6: NTSC composite video with an output level of 2V.

Note 7: Back to back 6V Zener diodes are connected between pins 2 and

3 for ESD protection.