Datasheet HFA1112 Datasheet (Intersil Corporation)

HFA1112

September 1998 File Number 2992.5

850MHz, Low Distortion Programmable
Gain Buffer Amplifier

The HFA1112 is a closed loop Buffer featuring user
programmable gain and ultra high speed performance.
Manufactured on Intersil’s proprietary complementary
bipolar UHF-1 process, the HFA1112 offers a wide -3dB
bandwidth of 850MHz, very fast slew rate, excellent gain
flatness, low distortion and high output current.

A unique feature of the pinout allows the user to select a
voltage gain of +1, -1, or +2, without the use of any external
components. Gain selection is accomplished via
connections to the inputs, as described in the “Application
Information” section. The result is a more flexible product,
fewerpart types in inventory, and more efficient use of board
space.

Compatibility with existing op amp pinouts provides flexibility
to upgrade low gain amplifiers, while decreasing component
count. Unlike most buffers, the standard pinout provides an
upgrade path should a higher closed loop gain be needed at
a future date.

This amplifier is available with programmable output limiting
as the HFA1113.Forapplications requiring a standard buffer
pinout, please refer to the HFA1110 datasheet. For Military
product, refer to the HFA1112/883 data sheet.

Pinout

HFA1112

(PDIP, SOIC)

TOP VIEW

300

300

-

+

8

NC

V+

7

OUT

6

NC

5

NC

-IN

+IN

1

2

3

V-

4

Features

• User Programmable for Closed-Loop Gains of +1, -1 or +2
without Use of External Resistors

• Wide -3dB Bandwidth. . . . . . . . . . . . . . . . . . . . . .850MHz

• Very Fast Slew Rate. . . . . . . . . . . . . . . . . . . . . . 2400V/µs

• Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . . 11ns

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

• Excellent Gain Accuracy . . . . . . . . . . . . . . . . . . . 0.99V/V

• Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . <10ns

• Standard Operational Amplifier Pinout

Applications

• RF/IF Processors

• Driving Flash A/D Converters

• High-Speed Communications

• Impedance Transformation

• Line Driving

• Video Switching and Routing

• Radar Systems

• Medical Imaging Systems

• Related Literature

- AN9507, Video Cable Drivers Save Board Space

Ordering Information

PART NUMBER

(BRAND)

HFA1112IP -40 to 85 8 Ld PDIP E8.3
HFA1112IB

(H1112I)
HFA11XXEVAL High Speed Op Amp DIP Evaluation Board

TEMP.

RANGE (oC) PACKAGE

-40 to 85 8 Ld SOIC M8.15

PKG.

NO.

Pin Description

PIN

NAME

NC 1, 5, 8 No Connection

-IN 2 Inverting Input
+IN 3 Non-Inverting Input

V- 4 Negative Supply

OUT 6 Output

V+ 7 Positive Supply

NUMBER DESCRIPTION

1

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

http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999

HFA1112

Absolute Maximum Ratings Thermal Information

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

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

Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA

SUPPLY

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 operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

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

Thermal Resistance (Typical, Note 1) θJA (oC/W) θJC (oC/W)

PDIP Package . . . . . . . . . . . . . . . . . . . 98 N/A

SOIC Package . . . . . . . . . . . . . . . . . . . 170 N/A

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

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

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

(SOIC - Lead Tips Only)

Electrical Specifications V

PARAMETER TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS

INPUT CHARACTERISTICS

Output Offset Voltage 25 - 8 25 mV

Output Offset Voltage Drift Full - 10 - µV/oC
PSRR 25 39 45 - dB

Input Noise Voltage (Note 3) 100kHz 25 - 9 - nV/√Hz
Non-Inverting Input Noise Current (Note 3) 100kHz 25 - 37 - pA/√Hz
Non-Inverting Input Bias Current 25 - 25 40 µA

Non-Inverting Input Resistance 25 25 50 - kΩ
Inverting Input Resistance (Note 2) 25 240 300 360 Ω
Input Capacitance 25 - 2 - pF
Input Common Mode Range Full ±2.5 ±2.8 - V

TRANSFER CHARACTERISTICS

Gain AV = +1, VIN = +2V 25 0.980 0.990 1.02 V/V

Gain AV = +2, VIN = +1V 25 1.96 1.98 2.04 V/V

DC Non-Linearity (Note 3) AV = +2, ±2V Full Scale 25 - 0.02 - %

OUTPUT CHARACTERISTICS

Output Voltage (Note 3) AV = -1 25 ±3.0 ±3.3 - V

Output Current (Note 3) RL = 50Ω 25, 85 50 60 - mA

Closed Loop Output Impedance DC, AV = +2 25 - 0.3 - Ω

POWER SUPPLY CHARACTERISTICS

Supply Voltage Range Full ±4.5 - ±5.5 V
Supply Current (Note 3) 25 - 21 26 mA

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

SUPPLY

Full - - 35 mV

Full 35 - - dB

Full - - 65 µA

Full 0.975 - 1.025 V/V

Full 1.95 - 2.05 V/V

Full ±2.5 ±3.0 - V

-40 35 50 - mA

Full - - 33 mA

2

HFA1112

Electrical Specifications V

PARAMETER TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS

AC CHARACTERISTICS

-3dB Bandwidth
(V

= 0.2V

OUT

Slew Rate
(V

= 5V

OUT

Full Power Bandwidth
(V

= 5V

OUT

Gain Flatness
(to 30MHz, Notes 2, 3)

Gain Flatness
(to 50MHz, Notes 2, 3)

Gain Flatness
(to 100MHz, Notes 2, 3)

Linear Phase Deviation
(to 100MHz, Note 3)

2nd Harmonic Distortion
(30MHz, V

3rd Harmonic Distortion
(30MHz, V

2nd Harmonic Distortion
(50MHz, V

3rd Harmonic Distortion
(50MHz, V

2nd Harmonic Distortion
(100MHz, V

3rd Harmonic Distortion
(100MHz, V

P-P

P-P

P-P

OUT

OUT

OUT

OUT

OUT

OUT

, Notes 2, 3)

, Note 2)

, Note 3)

= 2V

P-P

= 2V

P-P

= 2V

P-P

= 2V

P-P

= 2V

P-P

= 2V

P-P

, Notes 2, 3)

, Notes 2, 3)

, Notes 2, 3)

, Notes 2, 3)

, Notes 2, 3)

, Notes 2, 3)

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

SUPPLY

AV = -1 25 450 800 - MHz
AV = [phone] - MHz
AV = [phone] - MHz
AV = -1 25 1500 2400 - V/µs
AV = [phone] - V/µs
AV = [phone] - V/µs
AV = -1 25 - 300 - MHz
AV = +1 25 - 150 - MHz
AV = +2 25 - 220 - MHz
AV = -1 25 - ±0.02 - dB
AV = +1 25 - ±0.1 - dB
AV = +2 25 - ±0.015 ±0.04 dB
AV = -1 25 - ±0.05 - dB
AV = +1 25 - ±0.2 - dB
AV = +2 25 - ±0.036 ±0.08 dB
AV = -1 25 - ±0.10 - dB
AV = +2 25 - ±0.07 ±0.22 dB
AV = -1 25 - ±0.13 - Degrees
AV = +1 25 - ±0.83 - Degrees
AV = +2 25 - ±0.05 - Degrees
AV = -1 25 - -52 - dBc
AV = +1 25 - -57 - dBc
AV = +2 25 - -52 -45 dBc
AV = -1 25 - -71 - dBc
AV = +1 25 - -73 - dBc
AV = +2 25 - -72 -65 dBc
AV = -1 25 - -47 - dBc
AV = +1 25 - -53 - dBc
AV = +2 25 - -47 -40 dBc
AV = -1 25 - -63 - dBc
AV = +1 25 - -68 - dBc
AV = +2 25 - -65 -55 dBc
AV = -1 25 - -41 - dBc
AV = +1 25 - -50 - dBc
AV = +2 25 - -42 -35 dBc
AV = -1 25 - -55 - dBc
AV = +1 25 - -49 - dBc
AV = +2 25 - -62 -45 dBc

3

HFA1112

Electrical Specifications V

PARAMETER TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS

3rd Order Intercept
(AV = +2, Note 3)

1dB Compression
(AV = +2, Note 3)

Reverse Isolation
(S12, Note 3)

TRANSIENT CHARACTERISTICS

Rise Time
(V

= 0.5V Step, Note 2)

OUT

Rise Time
(V

= 2V Step)

OUT

Overshoot
(V

= 0.5V Step, Input tR/tF = 200ps,

OUT

Notes 2, 3, 4)

0.1% Settling Time (Note 3) V

0.05% Settling Time V
Overdrive Recovery Time VIN = 5V
Differential Gain AV = +1, 3.58MHz, RL = 150Ω 25 - 0.03 - %

Differential Phase AV = +1, 3.58MHz, RL = 150Ω 25 - 0.05 - Degrees

NOTES:

2. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation.

3. See Typical Performance Curves for more information.

4. Overshoot decreases as input transition times increase, especially for AV = +1. Please refer to Typical Performance Curves.

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

SUPPLY

100MHz 25 - 28 - dBm
300MHz 25 - 13 - dBm
100MHz 25 - 19 - dBm
300MHz 25 - 12 - dBm
40MHz 25 - -70 - dB
100MHz 25 - -60 - dB
600MHz 25 - -32 - dB

AV = -1 25 - 500 800 ps
AV = +1 25 - 480 750 ps
AV = +2 25 - 700 1000 ps
AV = -1 25 - 0.82 - ns
AV = +1 25 - 1.06 - ns
AV = +2 25 - 1.00 - ns
AV = -1 25 - 12 30 %
AV = +1 25 - 45 65 %
AV = +2 25 - 6 20 %

= 2V to 0V 25 - 11 - ns

OUT

= 2V to 0V 25 - 15 - ns

OUT

P-P

AV = +2, 3.58MHz, RL = 150Ω 25 - 0.02 - %

AV = +2, 3.58MHz, RL = 150Ω 25 - 0.04 - Degrees

25 - 8.5 - ns

Application Information

Closed Loop Gain Selection

The HFA1112 features a novel design which allows the user
to select from three closed loop gains, without any external
components. The result is a more flexibleproduct, fewer part
types in inventory, and more efficient use of board space.

This “buffer” operates in closed loop gains of -1, +1, or +2, and
gain selection is accomplished via connections to the ±inputs.
Applying the input signal to +IN and floating -IN selects a gain
of +1, while grounding -IN selects a gain of +2. A gain of -1 is
obtained by applying the input signal to -IN with +IN grounded.

4

The table below summarizes these connections:

GAIN
(ACL)

-1 GND Input
+1 Input NC (Floating)
+2 Input GND

+INPUT (PIN 3) -INPUT (PIN 2)

CONNECTIONS

HFA1112

PC Board Layout

The frequency response of this amplifier depends greatly on
the amount of care taken in designing the PC board. The

use of low inductance components such as chip
resistors and chip capacitors is strongly recommended,
while a solid ground plane is a must!

Attention should be given to decoupling the power supplies.
A large value (10µF) tantalum in parallel with a small value
(0.1µF) chip capacitor works well in most cases.

Terminated microstrip signal lines are recommended at the
input and output of the device. Capacitance directly on the
output must be minimized, or isolated as discussed in the
next section.

For unity gain applications, care must also be taken to
minimize the capacitance to ground seen by the amplifier’s
inverting input. At higher frequencies this capacitance will
tend to short the -INPUT to GND, resulting in a closed loop
gain which increases with frequency. This will cause
excessive high frequency peaking and potentially other
problems as well.

An example of a good high frequency layout is the
Evaluation Board shown in Figure 2.

overdampedresponse, while pointsbelow or left of the curve
indicate areas of underdamped performance.

R

and CLform a low pass network at the output, thus

S

limiting system bandwidth well below the amplifier
bandwidth of 850MHz. By decreasing R

as CLincreases

S

(as illustrated in the curves), the maximum bandwidth is
obtained without sacrificing stability. Even so, bandwidth
does decrease as you move to the right along the curve.
For example, at A

= +1, RS=50Ω,CL= 30pF, the overall

V

bandwidth is limited to 300MHz, and bandwidth drops to
100MHz at A

50
45
40
35
30

(Ω)

25

S

20

R

15
10

5
0

FIGURE 1. RECOMMENDED SERIES OUTPUT RESISTOR vs

= +1, RS = 5Ω, CL = 340pF.

V

AV = +1

AV = +2

0 40 80 120 160 200 240 280 320 360 400

LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

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

∞ (A

= +1)

V

or 0Ω (A

IN

10µF

R

0.1µF

1

50Ω

= +2)

V

1
2
3
4

-5V

) in series with the output

S

and C

S

V

H

8
7

50Ω

6
5

GND

GND

OUT
V

L

L

10µF0.1µF

+5V

Evaluation Board

The performance of the HFA1112 may be evaluated using
the HFA11XX Evaluation Board, slightly modified as follows:

1. Removethe 500Ω feedback resistor (R
connection open.

1. a. For A
b. For A

= +1 evaluation, remove the 500Ω gain setting

V

resistor (R

), and leave pin 2 floating.

1

= +2, replace the 500Ω gainsetting resistor with

V

a 0Ω resistor to GND.

The layout and modified schematic of the board are shown
in Figure 2.

To order evaluation boards (part number HFA11XXEVAL),
please contact your local sales office.

TOP LAYOUT BOTTOM LAYOUT

V

H

1

+IN

OUT

V+

V

L

V-

GND

), and leave the

2

FIGURE 2. EVALUATION BOARD SCHEMATIC AND LAYOUT

5

HFA1112

Typical Performance Curves

200

AV = +2

150

100

50

0

-50

OUTPUT VOLTAGE (mV)

-100

-150

-200
TIME (5ns/DIV.)

FIGURE 3. SMALL SIGNAL PULSE RESPONSE FIGURE 4. LARGE SIGNAL PULSE RESPONSE

200

AV = +1

150

100

50

V

SUPPLY

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified

2.0
AV = +2

1.5

1.0

0.5

0

-0.5

OUTPUT VOLTAGE (V)

-1.0

-1.5

-2.0
TIME (5ns/DIV.)

2.0
A

= +1

V

1.5

1.0

0.5

0

-50

OUTPUT VOLTAGE (mV)

-100

-150

-200
TIME (5ns/DIV.)

0

-0.5

OUTPUT VOLTAGE (V)

-1.0

-1.5

-2.0
TIME (5ns/DIV.)

FIGURE 5. SMALL SIGNAL PULSE RESPONSE FIGURE 6. LARGE SIGNAL PULSE RESPONSE

200

150

100

50

0

-50

-100

OUTPUT VOLTAGE (mV)

-150

AV = -1

2.0

1.5

1.0

0.5

-0.5

OUTPUT VOLTAGE (V)

-1.0

-1.5

AV = -1

0

-200
TIME (5ns/DIV.)

-2.0
TIME (5ns/DIV.)

FIGURE 7. SMALL SIGNAL PULSE RESPONSE FIGURE 8. LARGE SIGNAL PULSE RESPONSE

6

HFA1112

Typical Performance Curves

6

V

= 200mV

OUT

3
0

-3

-6

-9

NORMALIZED GAIN (dB)

PHASE

0.3 1 10 100 1000

P-P

GAIN

FREQUENCY (MHz)

AV = +1

AV = +2

AV = -1

AV = -1

AV = +2

AV = +1

V

SUPPLY

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)

0

-90

-180

-270

-360

FIGURE 9. FREQUENCY RESPONSE FIGURE10. FREQUENCY RESPONSE FOR VARIOUS LOAD

6

AV = +1, V

3
0

GAIN

-3

GAIN (dB)

-6

-9

PHASE

0.3 1 10 100 1000

= 200mV

OUT

FREQUENCY (MHz)

P-P

RL = 1kΩ

RL = 100Ω

RL = 50Ω

RL = 100Ω

RL = 50Ω

RL = 1kΩ

FIGURE 11. FREQUENCY RESPONSE FOR VARIOUS LOAD

RESISTORS

9
6

3

GAIN (dB)

0

NORMALIZED PHASE (DEGREES)

0.3 1 10 100 1000

6

AV = -1, V

3
0

-3

GAIN (dB)

-6

-9

0

-90

-180

-270
PHASE (DEGREES)

-360

0.3 1 10 100 1000

FIGURE 12. FREQUENCY RESPONSE FOR VARIOUS LOAD

AV = +2, V

GAIN

PHASE

RESISTORS

PHASE

RESISTORS

OUT

OUT

GAIN

= 200mV

= 200mV

P-P

RL = 50Ω

RL = 100Ω

RL = 100Ω

RL = 50Ω

FREQUENCY (MHz)

P-P

FREQUENCY (MHz)

RL = 1kΩ

RL = 1kΩ

RL = 1kΩ

RL = 100Ω

RL = 50Ω

RL = 50Ω

RL = 1kΩ

RL = 100Ω

0

-90

-180

-270
PHASE (DEGREES)

-360

180
90
0

-90

-180

PHASE (DEGREES)

12

AV = +2

9
6

GAIN

3

GAIN (dB)

4.0V

2.5V
1V

4.0V

2.5V

P-P

P-P

P-P

0

PHASE

0.3 1 10 100 1000
FREQUENCY (MHz)

P-P

P-P

1V

P-P

0

-90

-180

-270

-360

FIGURE 13. FREQUENCY RESPONSE FOR VARIOUS OUTPUT

VOLTAGES

7

6
3
0

-3

GAIN (dB)

-6

PHASE (DEGREES)

0.3 1 10 100 1000

FIGURE 14. FREQUENCY RESPONSE FOR VARIOUS OUTPUT

AV = +1

GAIN

PHASE

VOLTAGES

V

= 4V

OUT

V

= 2.5V

OUT

V

OUT

V

= 4V

OUT

V

= 2.5V

OUT

V

OUT

FREQUENCY (MHz)

P-P

= 1V

P-P

= 1V

P-P

P-P

P-P

P-P

0

-90

-180

-270

-360

PHASE (DEGREES)

HFA1112

Typical Performance Curves

6

AV = -1

3

GAIN

0

-3

GAIN (dB)

-6
PHASE

0.3 1 10 100 1000
FREQUENCY (MHz)

V

OUT

V

V

V

OUT

V

OUT

OUT

= 4V

= 2.5V

OUT

= 2.5V

= 4V

V

OUT

P-P

= 1V

P-P

= 1V

P-P

P-P

P-P

V

SUPPLY

P-P

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)

180
90
0

-90

-180

FIGURE 15. FREQUENCY RESPONSE FOR VARIOUS OUTPUT

VOLTAGES

900

850

800

750

700

650

BANDWIDTH (MHz)

600

550

500

-50 -25 0 25 50 75 100 125

AV = +1

AV = -1

AV = +2

TEMPERATURE (

o

C)

NORMALIZED GAIN (dB)

PHASE (DEGREES)

NORMALIZED GAIN (dB)

15

V

= 5V

OUT

12

9
6
3
0

-3

-6

-9

-12

-15

0.3 1 10 100 1000

P-P

AV = -1
AV = +2

AV = +1

FREQUENCY (MHz)

FIGURE 16. FULL POWER BANDWIDTH

0.35

0.30

0.25

0.20

0.15

0.10

0.05
0

-0.05

-0.10

-0.15
1 10 100

FREQUENCY (MHz)

AV = +1

AV = -1

AV = +2

FIGURE 17. -3dB BANDWIDTH vs TEMPERATURE FIGURE 18. GAIN FLATNESS

4
3
2
1
0

-1

-2

-3

DEVIATION (DEGREES)

-4

-5

-6
0 15 30 45 60 75 90 105 120 135

FREQUENCY (MHz)

AV = +1

AV = -1

A

= +2

V

150

AV = +2, V

0.6

0.4

0.2

0.1
0

-0.1

-0.2

-0.4

SETTLING ERROR (%)

-0.6

-2 3 8 13 18 23 28 33 38 43 48

= 2V

OUT

TIME (ns)

FIGURE 19. DEVIATION FROM LINEAR PHASE FIGURE 20. SETTLING RESPONSE

8

HFA1112

Typical Performance Curves

-24

-30

-36

-42

-48

-54

GAIN (dB)

-60

-66

-72

-78

-84

AV = -1

AV = +2

20 40 60 80 100 120 140 160 180 200

0

FREQUENCY (MHz)

V

SUPPLY

AV = +1

AV = +2

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)

AV = -1

PHASE

AV = -1

-24

-30

-36

-42

-48

GAIN (dB)

-54

-60
100 190 280 370 460 550 640 730 820 910 1000

AV = +2

AV = -1

FREQUENCY (MHz)

AV = +1

AV = +2

GAIN

AV = +1

FIGURE 21. LOW FREQUENCY REVERSE ISOLATION (S12) FIGURE 22. HIGH FREQUENCY REVERSE ISOLATION (S12)

20
18
16
14
12
10

8
6
4
2
0

OUTPUT POWER AT 1dB COMPRESSION (dBm)

100 200 300 400 500

AV = +1

AV = -1

AV = +2

FREQUENCY (MHz)

30

20

10

INTERCEPT POINT (dBm)

0

100 200 300 400

2 - TONE

AV = -1

AV = +2

AV = +1

FREQUENCY (MHz)

235
180
90
45
0

PHASE (DEGREES)

FIGURE 23. 1dB GAIN COMPRESSION vs FREQUENCY FIGURE 24. 3rd ORDER INTERMODULATIONINTERCEPTvs

FREQUENCY

-20
AV = +2

-30

-40

-50

-60

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15

100MHz

OUTPUT POWER (dBm)

50MHz

30MHz

FIGURE 25. 2nd HARMONIC DISTORTION vs P

OUT

-20
AV = +2

-30

-40

-50

-60

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15 18

100MHz

50MHz

OUTPUT POWER (dBm)

30MHz

FIGURE 26. 3rd HARMONIC DISTORTION vs P

OUT

9

HFA1112

Typical Performance Curves

-20
AV = +1

-30

-40

-50

-60

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15

100MHz

50MHz

OUTPUT POWER (dBm)

FIGURE 27. 2nd HARMONIC DISTORTION vs P

-20
AV = -1

-30

-40

-50

-60

100MHz

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15

50MHz

OUTPUT POWER (dBm)

30MHz

30MHz

V

SUPPLY

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)

-20
AV = +1

-30

-40

-50

-60

OUT

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15

FIGURE 28. 3rd HARMONIC DISTORTION vs P

-20

AV = -1

-30

-40

-50

-60

-70

DISTORTION (dBc)

-80

-90

-100

-6 -3 0 3 6 9 12 15

100MHz

50MHz

OUTPUT POWER (dBm)

100MHz

OUTPUT POWER (dBm)

30MHz

50MHz

30MHz

OUT

FIGURE 29. 2nd HARMONIC DISTORTION vs P

0.04

0.02

0

PERCENT ERROR (%)

-0.02

-0.04

-3.0

-2.0 -1.0 0 1.0 2.0 3.0
INPUT VOLTAGE (V)

OUT

FIGURE 30. 3rd HARMONIC DISTORTION vs P

60

V

= 0.5V

OUT

50

40

30

OVERSHOOT (%)

20

AV = -1

10

AV = +2

0

100 300 500 700 900 1100 1300

AV = +1

INPUT RISE TIME (ps)

FIGURE 31. INTEGRAL LINEARITY ERROR FIGURE 32. OVERSHOOT vs INPUT RISE TIME

10

OUT

HFA1112

Typical Performance Curves

60

V

= 1V

OUT

50

40

30

20

OVERSHOOT (%)

10

AV = +2

0

100 300 500 700 900 1100 1300

INPUT RISE TIME (ps)

AV = -1

V

SUPPLY

AV = +1

= ±5V, TA = 25oC, RL = 100Ω, Unless Otherwise Specified (Continued)

FIGURE 33. OVERSHOOT vs INPUT RISE TIME FIGURE 34. OVERSHOOT vs INPUT RISE TIME

22
21
20
19
18
17
16
15
14
13
12
11
10

SUPPLY CURRENT (mA)

9
8
7
6
5

59

678 10

TOTAL SUPPLY VOLTAGE (V+ - V-, V)

60

V

= 2V

OUT

50

40

AV = +2

AV = -1

AV = +1

o

C)

30

20

OVERSHOOT (%)

10

0

100 300 500 700 900 1100 1300

INPUT RISE TIME (ps)

25
24
23
22
21
20
19
18

SUPPLY CURRENT (mA)

17
16
15

-50 -25 0 25 50 75 100 125
TEMPERATURE (

FIGURE 35. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 36. SUPPLY CURRENT vs TEMPERATURE

3.6

3.5

3.4

3.3

3.2

3.1

3.0

2.9

OUTPUT VOLTAGE (V)

2.8

2.7

2.6

AV = -1

+V

(RL= 50Ω)

OUT

+V

(RL= 100Ω)

OUT

|-V

| (RL= 100Ω)

OUT

|-V

| (RL= 50Ω)

OUT

-50 -25 0 25 50 75 100 125
TEMPERATURE (

o

C)

50

40

30

20

E

NOISE VOLTAGE (nV/√Hz)

10

0

0.1 1 10 100
FREQUENCY (kHz)

NI

I

NI

FIGURE 37. OUTPUT VOLTAGE vs TEMPERATURE FIGURE 38. INPUT NOISE CHARACTERISTICS

11

130

110

90

70

50

30

NOISE CURRENT (pA/√Hz)

Die Characteristics

HFA1112

DIE DIMENSIONS:

63 mils x 44 mils x 19 mils
1600µm x 1130µm 483µm

METALLIZATION:

Type: Metal 1: AlCu (2%)/TiW
Thickness: Metal 1: 8k

Å ±0.4kÅ

Type: Metal 2: AlCu (2%)
Thickness: Metal 2: 16k

Å ±0.8kÅ

Metallization Mask Layout

PASSIVATION:

Type: Nitride
Thickness: 4k

Å ±0.5kÅ

TRANSISTOR COUNT:

52

SUBSTRATE POTENTIAL (Powered Up):

Floating (Recommend Connection to V-)

HFA1112

NC

+IN

V-

NC

NC

OUT

-IN

NC

V+

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Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with­out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

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