Fairchild Semiconductor KH300 Datasheet
Features
■
-3dB bandwidth of 85MHz
■
3000V/µsec slew rate
■
4ns rise and fall time
■
100mA output current
■
Low distortion, linear phase
Applications
■
Digital communications
■
Baseband and video communications
■
Instrument input/output amplifiers
■
Fast A to D, D to A conversion
■
Graphic CRT video drive amp
■
Coaxial cable line driver
General Description
The KH300 operational amplifier is a current feedback amplifier that provides a DC-85MHz -3dB bandwidth that is virtually independent of gain setting.
Rise and fall times of 4ns and drive capability of
22Vppand 100mA add to the KH300’s impressive
specifications.
Using the KH300 is as easy as adding power supplies
and a gain-setting resistor. Unlike conventional op
amp designs in which optimum gain-bandwidth
product occurs at a high gain, minimum settling time
at a gain of -1, maximum slew rate at a gain of +1,
et cetera, the KH300 offers consistent performance
at gain settings from 1 to 40 inverting or non-inverting.
As a result, designing with the KH300 is greatly
simplified. And since no external compensation is
necessary, “tweeks” on the production line have been
eliminated, making the KH300 an efficient
component for use in production situations.
Flat gain and phase response from DC to 45MHz and
superior rise and fall times make the KH300 an ideal
amplifier for a broad range of pulse, analog, and
digital applications. A 45MHz full power bandwidth
(20V
pp
into 100Ω) and 3000V/µsec slew rate eliminate
the need for power buffers in many applications
such as driving “flash” A to D converters or linedriving. For applications requiring lower power
consumption, the KH300 can operate on supplies as
low as ±5V. Fast overload recovery (20ns) helps
prevent loss of data in communications applications
and flat phase response reduces distortion, even when
data must be sent over extended lengths of line.
The KH300A is packaged in a side-brazed 24-pin
ceramic DIP and is specified at 25°C.
KH300
Wideband, High-Speed Operational Amplifier
www.fairchildsemi.com
REV. 1A February 2001
KH300 Equivalent Circuit Diagram
Pin 11 provides access to a 1500Ω feedback
resistor which can be connected to the output or left open if an external feedback
resistor is desired. All undesignated pins are
internally unconnected.
16
+V
CC
6
V+
V-
+
12
V
o
8
-
1500
24
13
GND
-V
CC
R
11
f
2 REV. 1A February 2001
DATA SHEET KH300
magnitude of gain {|V
out/Vin
|]
4* 20 40
PARAMETERS CONDITIONS TYP MIN
2
TYP MAX
2
TYP UNITS
Frequency Domain Response
-3dB bandwidth Vo< 4V
pp
105 75 85 70 MHz
Vo= 20V
pp
45 45 45 MHz
gain flatness 100KHz to 20MHz ±0.25 ±0.08 ±0.3 ±0.25 dB
20MHz to 45MHz ±0.5 ±0.25 ±0.6 ±1 dB
phase shift 1 1.6 2 deg/MHz
deviation from linear phase DC to 45MHz 2 3 5 deg
reverse isolation 60 70 70 dB
distortion refer to graphs
Time Domain Response
rise and fall time 5V output step 3 4 5 ns
20V output step 7 7 7 ns
settling time to 0.8% 10V output step 20 20 25 ns
overshoot (input rise time ≤ 1ns) 5V output step 5 5 5 %
slew rate 3 3 3 V/
µs
overload recovery (200% od) < 50ns pulse width 20 20 20 ns
General Information CONDITIONS MIN
2
TYP MAX
2
UNITS
input offset voltage (drift) 10(25) 32 mV(µV/°C)
input bias current (drift) non-inverting 10(20) 30
µV(nA/°C)
inverting 30(50) 100
µV(nA/°C)
equivalent input noise
1
integrated 0.1 to 100MHz, 22 56 µV
(R
s
= 50Ω, gain = 20)
second/third harmonic distortion 20MHz, +10dBm 48 38 -dBc
input impedance non-inverting 100K/3
Ω/pF
power supply rejection ratio input referred 45 60 dB
common mode rejection ratio input referred 64 dB
output drive voltage,current 10, 100 V, mA
supply current 24 33 mA
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
NOTES:
1) For Noise Figure, refer to Distortion and Noise section in text.
2) 100% tested at +25°C, A
V
= +20, RL= 100Ω, and VCC= ±15V.
* Refer to
Low Gain Operation section.
Absolute Maximum Ratings
supply voltage (±VCC) 16V (±5V min)
output current (I
o
) 100mA
input voltage (V
imax
) (|VCC| - 2.5)/A
V
common mode input voltage ±1/2 |VCC|
power dissipation refer to graph
junction temperature (T
J
) 150°C
storage temperature -55°C to +150°C
still air thermal resistance (
θca) +25°C/W
KH300 Electrical Characteristics
(25°C, VCC= ±15V, RL= 100Ω; unless noted)
KH300 DATA SHEET
REV. 1A February 2001 3
KH300 Performance Characteristics
(25°C, VCC= ±15V, RL= 100Ω; unless noted)
Non-Inverting Gain
Av = 4
Av = 20
Relative Gain (1dB/div)
0102030405060708090
Freguency (MHz)
Broadband Inverting & Non-Inverting Gain
Inverting
Relative Gain (10dB/div)
Av = 40
Av = 20
Non-inverting
Inverting Gain
Av = 20
Relative Gain (1dB/div)
100
0102030405060708090
Freguency (MHz)
Inverting & Non-Inverting Phase
0
°
-90
-180
°
°
Non-inverting
Av = 40
Inverting
Av = 4
Av = 20
100
-180
-270
-360
°
°
°
0 100 200 300 400 500 600 700 800 900
Freguency (MHz)
2nd & 3rd Harmonic Distortion Intercept
90
80
(I2)
2nd harmonic intercept
exceeds 90dBm below 10
70
60
50
Intercept Point (+dBm)
40
30
(I3)
3rd harmonic intercept
exceeds 64dBm below 10
4
10
5
10
6
10
Av = 20
5
Hz
5
Hz
10
Freguency (Hz)
Non-Inverting Small Signal Pulse Resp.
Av = 20
1GHz
0102030405060708090
100
Freguency (MHz)
2-Tone 3rd Order Intermod. Intercept
50
45
40
35
30
Intercept Point (+dBm)
7
8
10
25
0204060
Av = 20
80
100
Freguency (MHz)
Inverting Small Signal Pulse Response
Av = -20
Output Voltage (1V/div)
Time (5ns/div)
Output Voltage (1V/div)
Time (5ns/div)
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