7

LT1193

1193fb

TEMPERATURE (

°C)

–50

300

500

700

800

–25

125

LT1193 • TPC20

0

25

50

75

100

900

600

400

+SLEW RATE

– SLEW RATE

SETTLING TIME (ns)

40

–4

–2

2

4

50

100

LT1193 • TPC21

60

70

80

90

0

10mV

10mV

LOAD RESISTANCE (

Ω)

10

–5

–3

1

5

100

1000

LT1193 • TPC19

3

–1

Large-Signal Transient Response

TYPICAL PERFOR A CE CHARACTERISTICS

Output Voltage Swing

vs Load Resistance

Slew Rate vs Temperature

Output Voltage Step

Small-Signal Transient Response

Small-Signal Transient Response

LT1193 • TPC22

LT1193 • TPC23

LT1193 • TPC24

OVERSHOOT = 25%, RISE TIME = 4.7ns

APPLICATIO S I FOR ATIO

The LT1193 is a video difference amplifier which has two

uncommitted high input impedance (+) and (–) inputs.

The amplifier has one set of inputs that can be used for

reference and feedback. Additionally, this set of inputs

give gain adjust and DC control to the differential amplifier.

The voltage gain of the LT1193 is set like a conventional

operational amplifier. Feedback is applied to Pin 8 and it is

optimized for gains of 2 or greater. The amplifier can be

operated single-ended by connecting either the (+) or (–)

inputs to +/REF, Pin 1. The voltage gain is set by the

The primary usefulness of the LT1193 is in converting

high speed differential signals to a single-ended output.

The amplifier has common mode rejection beyond 50MHz

single-ended case, the differential voltage gain is set by the

differential signal for which the output will respond is

approximately

±1.3V.

Power Supply Bypassing

The LT1193 is quite tolerant of power supply bypassing.

In some applications a 0.1

µF ceramic disc capacitor

placed 1/2 inch from the amplifier is all that is required. A

scope photo of the amplifier output with no supply by-

passing is used to demonstrate this bypassing tolerance,