ELANT EL2445CS, EL2445CN, EL2245CS, EL2245CN Datasheet

EL2245C, EL2445C

Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp

EL2245C, EL2445C

Features

• 100MHz gain-bandwidth at gain­of-2

• Gain-of-2 stable

• Low supply current (per amplifier)
= 5.2mA at VS = ±15V

• Wide supply range
= ±2V to ±18V dual-supply
= 2.5V to 36V single-supply

• High slew rate = 275V/µs

• Fast settling = 80ns to 0.1% for a
10V step

• Low differential gain = 0.02% at
AV=+2, R

= 150Ω

L

• Low differential phase = 0.07° at
AV = +2, R

= 150Ω

L

• Stable with unlimited capacitive
load

• Wide output voltage swing
=±13.6V with VS = ±15V,
R

= 1000Ω

L

= 3.8V/0.3V with VS = +5V,
R

= 500Ω

L

Applications

• Video amplifier

• Single-supply amplifier

• Active filters/integrators

• High-speed sample-and-hold

• High-speed signal processing

• ADC/DAC buffer

• Pulse/RF amplifier

• Pin diode receiver

• Log amplifier

• Photo multiplier amplifier

• Difference amplifier

General Description

The EL2245C/EL2445C are dual and quad versions of the popular
EL2045C. They are high speed, low power, low cost monolithic oper­ational amplifiers built on Elantec's proprietary complementary
bipolar process. The EL2245C/EL2445C are gain-of-2 stable and fea­ture a 275V/µs slew rate and 100MHz bandwidth at gain-of-2 while
requiring only 5.2mA of supply current per amplifier.

The power supply operating range of the EL2245C/EL2445C is from
±18V down to as little as ±2V. For single-supply operation, the
EL2245C/EL2445C operate from 36V down to as little as 2.5V. The
excellent power supply operating range of the EL2245C/EL2445C
makes them an obvious choice for applications on a single +5V or
+3V supply.

The EL2245C/EL2445C also feature an extremely wide output volt­age swing of ±13.6V with VS = ±15V and R
output voltage swing is a wide ±3.8V with R
R

= 150Ω. Furthermore, for single-supply operation at +5V, output

L

voltage swing is an excellent 0.3V to 3.8V with R

= 1000Ω. At ±5V,

L

= 500Ω and ±3.2V with

L

= 500Ω.

L

At a gain of +2, the EL2245C/EL2445C have a -3dB bandwidth of
100MHz with a phase margin of 50°. They can drive unlimited load
capacitance, and because of their conventional voltage-feedback
topology, the EL2245C/EL2445C allow the use of reactive or non-lin­ear elements in their feedback network. This versatility combined with
low cost and 75mA of output-current drive make the
EL2245C/EL2445C an ideal choice for price-sensitive applications
requiring low power and high speed.

Connection Diagrams

EL2245CN/CS Dual EL2445CN/CS Quad

September 26, 2001

Ordering Information

Part No. Temp. Range Package Outline #

EL2245CN -40°C to +85°C 8-Pin P-DIP MDP0031

EL2245CS -40°C to +85°C 8-Lead SO MDP0027

EL2445CN -40°C to +85°C 14-Pin P-DIP MDP0031

EL2445CS -40°C to +85°C 14-Lead SO MDP0027

Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

© 2001 Elantec Semiconductor, Inc.

EL2245C, EL2445C

Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp

Absolute Maximum Ratings (T

Supply Voltage (VS) ±18V or 36V

Peak Output Current (IOP) Short-Circuit Protected

EL2245C, EL2445C

Output Short-Circuit Duration Infinite

A heat-sink is required to keep junction temperature below
absolute maximum when an output is shorted.

Input Voltage (V

IN)

= 25°C)

A

Differential Input Voltage (dVIN) ±10V

Power Dissipation (PD) See Curves

Operating Temperature Range (TA) 0°C to +75°C

Operating Junction Temperature (TJ) 150°C

Storage Temperature (TST) -65°C to +150°C

±V

S

Important Note:

All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: TJ = TC = TA.

DC Electrical Characteristics

VS = ±15V, R

Parameter Description Condition Temp Min Typ Max Unit

V

OS

TCV

I

B

I

OS

TCI

A

VOL

PSRR Power Supply

CMRR Common-Mode VCM = ±12V, V

CMIR Common-Mode

V

OUT

I

SC

I

S

= 1000Ω, unless otherwise specified

L

Input Offset

Voltage

Average Offset Voltage Drift

OS

VS = ±15V 25°C 0.5 4.0 mV

T

, T

MIN

[1]

MAX

All 10.0 µV/°C

Input Bias VS = ±15V 25°C 2.8 8.2 µA

Current T

MIN

, T

MAX

VS = ±5V 25°C 2.8 µA

Input Offset

Current

Average Offset Current Drift

OS

Open-Loop Gain VS = ±15V,V

VS = ±15V 25°C 50 300 nA

T

, T

MIN

VS = ±5V 25°C 50 nA

[1]

VS = ±5V, V

VS = ±5V, V

= ±10V, R

OUT

= ±2.5V, R

OUT

= ±2.5V, R

OUT

= 1000Ω 25°C 1500 3000 V/V

L

= 500Ω 25°C 2500 V/V

L

= 150Ω 25°C 1750 V/V

L

MAX

All 0.3 nA/°C

T

MIN

, T

MAX

1500 V/V

VS = ±5V to ±15V 25°C 65 80 dB

Rejection Ratio

= 0V 25°C 70 90 dB

OUT

Rejection Ratio T

T

MIN

MIN

, T

MAX

, T

MAX

60 dB

70 dB

VS = ±15V 25°C ±14.0 V

Input Range

VS = ±5V 25°C ±4.2 V

VS = +5V 25°C 4.2/0.1 V

Output Voltage

Swing

Output Short

Circuit Current

Supply Current

(Per Amplifier)

VS = ±15V, R

VS = ±15V, R

VS = ±5V, R

VS = ±5V, R

VS = +5V, R

= 1000Ω 25°C ±13.4 ±13.6 V

L

= 500Ω 25°C ±12.0 ±13.4 V

L

= 500Ω 25°C ±3.4 ±3.8 V

L

= 150Ω 25°C ±3.2 V

L

= 500Ω 25°C 3.6/0.4 3.8/0.3 V

L

T

, T

MIN

MAX

T

, T

MIN

MAX

±13.1 V

3.5/0.5 V

25°C 40 75 mA

T

MIN

, T

MAX

35 mA

VS = ±15V, No Load 25°C 5.2 7 mA

T

MIN

T

MAX

VS = ±5V, No Load 25°C 5.0 mA

6.0 mV

9.2 µA

400 nA

7.6 mA

7.6 mA

2

EL2245C, EL2445C

Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp

DC Electrical Characteristics (Continued)

VS = ±15V, R

Parameter Description Condition Temp Min Typ Max Unit

R

IN

C

IN

R

OUT

PSOR Power-Supply

1. Measured from T

Closed-Loop AC Electrical Characteristics

VS = ±15V, AV = +2, R

Parameter Description Condition Temp Min Typ Max Unit

BW -3dB Bandwidth

GBWP Gain-Bandwidth Product VS = ±15V 25°C 200 MHz

PM Phase Margin R

CS Channel Separation f = 5MHz 25°C 85 dB

SR Slew Rate

FPBW Full-Power Bandwidth

tr, t

OS Overshoot 0.1V Step 25°C 20 %

t

PD

t

s

dG Differential Gain

dP Differential Phase
eN Input Noise Voltage 10kHz 25°C 15.0 nV√Hz
iN Input Noise Current 10kHz 25°C 1.50 pA√Hz

CI STAB Load Capacitance Stability AV = +1 25°C Infinite pF

1. Slew rate is measured on rising edge.

2. For VS = ±15V, V

3. Video Performance measured at VS = ±15V, AV = +2 with 2 times normal video level across R

= 1000Ω, unless otherwise specified

L

Input Resistance Differential 25°C 150 kΩ

Common-Mode 25°C 15 MΩ

Input Capacitance AV = +1@ 10MHz 25°C 1.0 pF

Output Resistance A

Operating Range

to T

MIN

= 1000Ω unless otherwise specified

L

(V

= 0.4VPP)

OUT

f

Rise Time, Fall Time 0.1V Step 25°C 3.0 ns

Propagation Delay 25°C 2.5 ns

Settling to +0.1%

(AV = +1)

Vpeak).

across a back-terminated 75Ω load. For other values of R

OUT

.

MAX

[1]

[2]

[3]

[3]

= 20VPP. For VS = ±5V, V

= +1 25°C 50 mΩ

V

Dual-Supply 25°C ±2.0 ±18.0 V

Single-Supply 25°C 2.5 36.0 V

VS = ±15V, AV = +2 25°C 100 MHz

VS = ±15V, AV = -1 25°C 75 MHz

VS = ±15V, AV = +5 25°C 20 MHz

VS = ±15V, AV = +10 25°C 10 MHz

VS = ±15V, AV = +20 25°C 5 MHz

VS = ±5V, AV = +2 25°C 75 MHz

VS = ±5V 25°C 150 MHz

L

VS = ±15V, R

VS = ±5V, R

VS = ±15V 25°C 3.2 4.4 MHz

VS = ±5V 25°C 12.7 MHz

VS = ±15V, 10V Step 25°C 80 ns

VS = ±5V, 5V Step 25°C 60 ns

NTSC/PAL 25°C 0.02 %

NTSC/PAL 25°C 0.07 °

= 1 kΩ, C

OUT

= 10pF 25°C 50 °

L

= 1000Ω 25°C 200 275 V/µs

L

= 500Ω 25°C 200 V/µs

L

= 5V

. Full-power bandwidth is based on slew rate measurement using: FPBW = SR/(2π *

PP

= 150Ω. This corresponds to standard video levels

, see curves.

L

L

EL2245C, EL2445C

3

EL2245C, EL2445C

Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp

Test Circuit

EL2245C, EL2445C

4

Typical Performance Curves

EL2245C, EL2445C

EL2245C, EL2445C

Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp

Non-Inverting
Frequency Response

Open-Loop Gain and
Phase vs Frequency

CMRR, PSRR and Closed-Loop
Output Resistance vs
Frequency

Inverting Frequency Response Frequency Response for

Output Voltage Swing
vs Frequency

2nd and 3rd Harmonic
Distortion vs Frequency

Various Load Resistances

Equivalent Input Noise

Settling Time vs
Output Voltage Change

Supply Current vs
Supply Voltage

Common-Mode Input Range vs
Supply Voltage

5

Output Voltage Range
vs Supply Voltage