intersil HFA1150 DATA SHEET

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Data Sheet June 2004

HFA1150

FN4836.1

700MHz, SOT-23, Low Distortion Current Feedback Operational Amplifier

The HFA1150 is a high-speed, wideband, fast settling op amp built with Intersil's proprietary complementary bipolar UHF-1 process. The current feedback architecture delivers superb bandwidth even at very high gains (>300MHz at A

= 10), and the low distortion and excellent video

parameters make this amplifier ideal for communication and professional video applications.

Though specified for ±5V operation, the HFA1150 operates with single supply voltages as low as 4.5V, and requires only

3.4mA of I

in 5V applications (see Application Information

section, and Application Note AN9891). For a lower power amplifier in a SOT-23 package, please

refer to the HFA1155 data sheet.

Part # Information

TEMP.

PART NUMBER

(BRAND)

HFA1150IB (H1150I)

HFA1150IB96 (H1150I)

HFA1150IH96 (1150)

HFA11XXEVAL DIP Evaluation Board for High-Speed Op

OPAMPSOT23EVAL SOT-23 Evaluation Board for High-Speed Op

RANGE

(

C) PACKAGE PKG. NO.

-40 to 85 8 Ld SOIC M8.15

-40 to 85 8 Ld SOIC Tape and Reel

-40 to 85 5 Ld SOT-23 Tape and Reel

Amps

M8.15

P5.064

Features

• Low Distortion (5MHz, HD2) . . . . . . . . . . . . . . . . . -67dBc

• a-3dB Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . 700MHz

• High Slew Rate. . . . . . . . . . . . . . . . . . . . . . . . . . 2700V/µs

• Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . . 20ns

• Excellent Gain Flatness . . . . . . . . . . ±0.05dB to 100MHz

• High Output Current. . . . . . . . . . . . . . . . . . . . . . . . . 60mA

• Fast Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . <5ns

• Operates with 5V Single Supply (See AN9891)

Applications

• Video Switching and Routing

• Pulse and Video Amplifiers

• RF/IF Signal Processing

• Flash A/D Driver

• Medical Imaging Systems

• Related Literature

- AN9420, Current Feedback Theory

- AN9891, Single 5V Supply Operat io n

Pinouts

-IN

+IN

V-

HFA1150

TOP VIEW

1 2 3 4

(SOIC)

V+

OUT

1-888-INTERSIL or 321-724-7143

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

HFA1150

(SOT23)

TOP VIEW

OUT

1 2

V-

+IN

V+

-IN

HFA1150

Absolute Maximum Ratings T

Voltage Between V+ and V-. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V

Output Current (50% Duty Cycle) . . . . . . . . . . . . . . . . . . . . . . 60mA

ESD Rating

Human Body Model (Per MIL-STD-883 Method 3015.7). . . 600V

Operating Conditions

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

= 25oC Thermal Information

Thermal Resistance (Typical, Note 1) θ

SUPPLY

SOIC Package . . . . . . . . . . . . . . . . . . . 175

SOT-23 Package . . . . . . . . . . . . . . . . . 225

Moisture Sensitivity (see Technical Brief TB363)

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1

SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1

Maximum Junction Temperature (Plastic Package). . . . . . . . .150

Maximum Storage Temperature Range. . . . . . . . . . -65

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300

(Lead Tips Only)

(oC/W)

C to 150oC

NOTE:

is measured with the component mounted on an evaluation PC board in free air.

1. θ

Electrical Specifications V

PARAMETER

= ±5V, AV = 1, RF = 510Ω, RL = 100Ω, Unless Otherwise Specified

SUPPLY

TEST

CONDITIONS

(NOTE 2)

TEST

LEVEL

TEMP.

HFA1150IB (SOIC) HFA1150IH (SOT-23)

(

UNITSMIN TYP MAX MIN TYP MAX

INPUT CHARACTERISTICS

Input Offset Voltage (Note 3) A 25 - 2 6 - 2 6 mV

AFull--10--10mV

Input Offset Voltage Drift C Full - 10 - - 10 - µV/

CMRR ∆VCM = ±2V A 25 40 46 - 40 46 - dB

AFull38--38--dB

PSRR ∆VS = ±1.25V A 25 45 50 - 45 50 - dB

AFull42--42--dB

Non-Inverting Input Bias Current (Note 3)

Drift C Full - 40 - - 40 - nA/oC

BIAS

CMS ∆VCM = ±2V A 25 - 20 40 - 20 40 µA/V

BIAS

+IN = 0V A 25 - 25 40 - 25 40 µA

AFull--65--65µA

AFull--50--50µA/V

Inverting Input Bias Current (Note 3) -IN = 0V A 25 - 12 50 - 12 50 µA

AFull--60--60µA

Drift C Full - 40 - - 40 - nA/oC

-I

BIAS

CMS ∆VCM = ±2V A 25 - 1 7 - 1 7 µA/V

-I

BIAS

AFull--10--10µA/V

PSS ∆VS = ±1.25V A 25 - 6 15 - 6 15 µA/V

-I

BIAS

AFull--27--27µA/V Non-Inverting Input Resistance A 25 25 50 - 25 50 - kΩ Inverting Input Resistance C 25 - 25 - - 25 - Ω Input Capacitance (Either Input) B 25 - 2 - - 2 - pF Input Common Mode Range C Full ±2.5 ±3.0 - ±2.5 ±3.0 - V Input Noise Voltage (Note 3) 100kHz B 25 - 4.7 - - 4.7 - nV/√Hz +Input Noise Current (Note 3) 100kHz B 25 - 20 - - 20 - pA/√Hz

-Input Noise Current (Note 3) 100kHz B 25 - 40 - - 40 - pA/√Hz

TRANSFER CHARACTERISTICS

Open Loop Transimpedance Gain (Note 3) B 25 - 450 - - 450 - kΩ Minimum Stable Gain A Full 1 - - 1 - - V/V

HFA1150

Electrical Specifications V

PARAMETER

= ±5V, AV = 1, RF = 510Ω, RL = 100Ω, Unless Otherwise Specified (Continued)

SUPPLY

HFA1150IB (SOIC) HFA1150IH (SOT-23)

(

TEST

CONDITIONS

(NOTE 2)

TEST

LEVEL

TEMP.

UNITSMIN TYP MAX MIN TYP MAX

AC CHARACTERISTICS AV = +2, (Note 4) Unless Otherwise Specified

-3dB Bandwidth (V

= 0.2V

OUT

P-P

-3dB Bandwidth (V Gain Flatness

= 0.2V

OUT

P-P

, Note 3)

= 2V

OUT

, Note 3)

P-P

= -1 B 25 - 650 - - 540 - MHz

= +1 B 25 - 600 - - 500 - MHz

= +2 B 25 - 700 - - 540 - MHz

= +2 B 25 - 375 - - 350 - MHz

To 25MHz B 25 - ±0.03 - - ±0.05 - dB To 50MHz B 25 - ±0.04 - - ±0.08 - dB To 100MHz B 25 - ±0.05 - - ±0.1 - dB

= +1 B 25 - 100 - - 90 - MHz

Full Power Bandwidth

= 5V

OUT

OUTPUT CHARACTERISTICS A

P-P

, Note 3)

= +2, (Note 4) Unless Otherwise Specified

Output Voltage A

= +2 B 25 - 175 - - 160 - MHz

= -1 A 25 ±3.0 ±3.3 - ±3.0 ±3.3 - V

AFull±2.5 ±3.0 - ±2.5 ±3.0 - V Output Current R

= 50Ω, AV = -1 A 25, 85 ±50 ±60 - ±50 ±60 - mA

A-40±35 ±50 - ±35 ±50 - mA DC Closed Loop Output Impedance (Note 3) B 25 - 0.07 - - 0.07 - Ω 2nd Harmonic Distortion (Note 3) 5MHz, V

30MHz, V

3rd Harmonic Distortion (Note 3) 5MHz, V

30MHz, V TRANSIENT CHARACTERISTICS A Rise and Fall Times V Overshoot V Slew Rate (V

OUT

Settling Time (V

= 5V

OUT

P-P

= 2V to 0V, Note 3) To 0.1% B 25 - 20 - - 30 - ns

= +2, (Note 4) Unless Otherwise Specified

= 0.5V

OUT

= 0.5V

OUT

= -1 B 25 - 2700 - - 2500 - V/µs

= +1 B 25 - 750 - - 700 - V/µs

= +2 B 25 - 1300 - - 1200 - V/µs

OUT

= 2V

P-P P-P

P-P

B25--67---67-dBc B25--53---53-dBc B 25 - <-100 - - <-100 - dBc B25--76---76-dBc

B25-0.6--0.7-ns B 25 - 12 - - 12 - %

To 0.05% B 25 - 33 - - 37 - ns

To 0.01% B 25 - 55 - - 60 - ns Overdrive Recovery Time V VIDEO CHARACTERISTICS A

= +2, (Note 4) Unless Otherwise Specified

Differential Gain NTSC, R

Differential Phase NTSC, R

= ±2V B 25 - 5 - - 5 - ns

= 150Ω B 25 - 0.02 - - 0.02 - %

NTSC, R

= 75Ω B 25 - 0.04 - - 0.04 - %

= 150Ω B 25 - 0.03 - - 0.03 - Degrees

= 75Ω B 25 - 0.06 - - 0.06 - Degrees

POWER SUPPLY CHARACTERISTICS

Power Supply Range Note 5 B Full ±2.25 - ±5.5 ±2.25 - ±5.5 V Power Supply Current (Note 3) A Full - 12 16 - 12 16 mA

NOTES:

2. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only.

3. See Typical Performance Curves for more information.

4. The feedback resistor value depends on closed loop gain and package type. See the “Optimum Feedback Resistor” table in the Application Information section for values used for characterization.

5. The minimum supply voltage entry is a typical value.

HFA1150

Application Information

Relevant Application Notes

The following Application Notes pertain to the HFA1150:

• AN9787 - An Intuitive Approach to Understanding Current Feedback Amplifiers

• AN9420 - Current Feedback Amplifier Theory and Applications

• AN9663-Converting from Voltage Feedback to Current Feedback Amplifiers

• AN9891-Operating the HFA1150 from 5V Single Supply

These publications may be obtained from Intersil’s web site (http://www.intersil.com) or via our AnswerFAX system.

Performanc e Differences Between Packages

The HF A1150 is a high frequency current feedback amplifier . As such, it is sensitive to parasitic capacitances which influence the amplifier’s operation. The different parasitic capacitances of the SOIC and SOT-23 packages yield performance differences (notably bandwidth and bandwidth related parameters) between the two devices - see Electrical Specification tables for details.

Because of these performance differences, designers should evaluate and breadboard with the same package style to be used in production.

Note that some “Typical P erf ormance Curves” have separate graphs for each package type. Graphs not labeled with a specific package type are applicable to both packages.

Optimum Feedback Resistor

The enclosed frequency response graphs detail the performance of the HFA1150 in various gains. Although the bandwidth dependency on A voltage feedback amplifier, there is an appreciable decrease in bandwidth at higher gains. This decrease can be minimized by taking advantage of the current feedback amplifier’s unique relationship between bandwidth and R All current feedback amplifiers require a feedback resistor, even for unity gain applications, and the R with the internal compensation capacitor, sets the dominant pole of the frequency response. Thus, the amplifier’s bandwidth is inversely proportional to R optimized for a R +2. Decreasing R

= 576Ω/499Ω (SOIC/SOT-23), at a gain of

decreases stability , resulting in excessiv e

peaking and overshoot (Note: Capacitive feedback causes the same problems due to the feedback impedance decrease at higher frequencies). At higher gains the amplifier is more stable, so R off of stability for bandwidth. The table below lists recommended R

values for v arious gains, and the expected

bandwidth.

isn’t as severe as that of a

, in conjunction

. The HFA1150 is

can be decreased in a trade-

OPTIMUM FEEDBACK RESISTOR

RF (Ω)

-1 422/464 650/540

+1 383, (+R

+2 576/499 700/540 +5 348/422 480/400

+10 178/348 380/300

SOIC/SOT-23

= 226)/

549, (+R

= 100)

BANDWIDTH (MHz)

SOIC/SOT-23

600/500

5V Single Supply Operation

This amplifier operates at single supply voltages down to

4.5V. The dramatic supply current reduction at this operating condition (refer also to Figure 25) makes this op amp an even better choice for low power 5V systems. Refer to Application Note AN9891 for further information.

Driving Capacitive Loads

Capacitive loads, such as an A/D input, or an improperly terminated transmission line will degrade the amplifier’s phase margin resulting in frequency response peaking and possible oscillations. In most cases, the oscillation can be avoided by placing a resistor (R prior to the capacitance.

Figure 1 details starting points for the selection of this resistor. The points on the curve indicate the R combinations for the optimum bandwidth, stability, and settling time, but experimental fine tuning is recommended. Picking a point above or to the right of the curve yields an overdamped response, while points below or left of the curve indicate areas of underdamped performance.

and CL form a low pass network at the output, thus

limiting system bandwidth well below the amplifier bandwidth of 700MHz/540MHz (SOIC/SOT-23, A R

as CL increases (as illustrated by the curves), the

maximum bandwidth is obtained without sacrificing stability. In spite of this, bandwidth still decreases as the load capacitance increases. For example, at A C

= 22pF, the SOIC bandwidth is 410MHz, but the

bandwidth drops to 110MHz at A C

= 390pF.

) in series with the output

and CL

= +2). By decreasing

= +2, RS = 20Ω,

=+2, RS = 5Ω,

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