EL2257C/EL2357C
EL2257C/EL2357C
125 MHz Single Supply, Clamping Op Amps
Features
• Specified for +3V, +5V, or ± 5V
Applications
• Power Down to 0 µA
• Output Voltage Clamp
• Large Input Common Mode Range
0V < V
CM
< V
S
- 1.2V
• Output Swings to Ground Without
Saturating
• -3 dB Bandwidth = 125 MHz
• ± 0.1 dB Bandwidth = 30 MHz
• Low Supply Current = 5 mA
• Slew Rate = 275 V/µs
• Low Offset Voltage = 4 mV max
• Output Current = ±100 mA
• High Open Loop Gain = 80 dB
• Differential Gain = 0.05%
• Differential Phase = 0.05°
General Description
The EL2257C/EL2357C are supply op amps. Prior single supply op
amps have generally been limited to bandwidths and slew rates 1/4
that of the EL2257C/EL2357C. The 125 MHz bandwidth, 275 V/µs
slew rate, and 0.05%/0.05° differential gain/differential phase makes
this part ideal for single or dual supply video speed applications. With
its voltage feedback architecture, this amplifier can accept reactive
feedback networks, allowing them to be used in analog filtering appli-
cations. The inputs can sense signals below the bottom supply rail and
as high as 1.2V below the top rail. Connecting the load resistor to
ground and operating from a single supply, the outputs swing com-
pletely to ground without saturating. The outputs can also drive to
within 1.2V of the top rail. The EL2257C/EL2357C will output
±100 mA and will operate with single supply voltages as low as 2.7V,
making them ideal for portable, low power applications.
The EL2257C/EL2357C have a high speed disable feature. Applying a
low logic level to all ENABLE pins reduces the supply current to 0 µA
within 50 ns. Each amplifier has its own ENABLE pin. This is useful
for both multiplexing and reducing power consumption.
The EL2257C/EL2357C also have an output voltage clamp feature.
This clamp is a fast recovery (<7 ns) output clamp that prevents the
output voltage from going above the preset clamp voltage. This feature
is desirable for A/D applications, as A/D converters can require long
times to recover if overdriven.
The EL2257C/EL2357C are available in plastic DIP and SOIC pack-
ages. Both parts operate over the industrial temperature range of -40°C
to +85°C. For single amplifier applications, see the
EL2150C/EL2157C. For space saving, industry standard pin out dual
and quad applications, see the EL2250C/EL2450C.
Applications
•
•
•
•
•
•
•
Video Amplifier
PCMCIA Applications
A/D Driver
Line Driver
Portable Computers
High Speed Communications
RGB Printer, FAX, Scanner
Applications
• Broadcast Equipment
• Active Filtering
• Multiplexing
Ordering Information
Part No.
EL2257CN
EL2257CS
EL2357CN
EL2357CS
Temp. Range
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Package
14 Pin PDIP
14 Pin SOIC
16 Pin PDIP
16 Pin SOIC
Outline #
MDP0031
MDP0027
MDP0031
MDP0027
Connection Diagrams
January 5, 2000
Top View
Top View
© 1995 Elantec, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
