KH207 Datasheet PDF - Fairchild Semiconductor
| Part Number | KH207 | |
| Description | Low Distortion Wideband Op Amp | |
| Manufacturers | Fairchild Semiconductor | |
| Logo |  |
|
|
There is a preview and KH207 download ( pdf file ) link at the bottom of this page. Total 7 Pages | ||
Preview 1 page No Preview Available !
KH207
Low Distortion Wideband Op Amp
www.fairchildsemi.com
Features
s -80/-85dBc 2nd/3rd HD at 20MHz
s -3dB bandwidth of 170MHz
s 0.1% settling in 22ns
s Complete overdrive protection
s 2400V/µs slew rate
s 3MΩ input resistance
s Output may be current limited
s Direct replacement for CLC207
Applications
s Fast, precision A/D conversion
s Automatic test equipment
s Input/output amplifiers
s Photodiode, CCD preamps
s High-speed modems, radios
s Line drivers
Bottom View
Internal
Feedback
Case
ground
GND Rf
78
Non-Inverting
Input
V+ 6
2000Ω
Inverting
Input
V- 5
+
-
-VCC
9
Supply
Voltage
-VCC
10
Collector
Supply
6
6 11 Vo
Output
Not
Connected
NC 4
3
12
+VCC
21
Case and
bias ground
GND NC +VCC
Not Connected
Supply
Voltage
Collector
Supply
Pin 8 provides access to a 2000Ω feed-
back resistor which can be connected to
the output or left open if an external feed-
back resistor is desired.
General Description
The KH207 is a wideband, low distortion operational
amplifier designed specifically for applications requiring
both high speed and wide dynamic range. Utilizing
a proprietary current feedback architecture, the
KH207 offers performance far superior to that of
conventional voltage feedback op amps.
The most attractive feature of the KH207 is its
extremely low distortion: -80/-85dBc 2nd/3rd harmonics
at 20MHz (2Vpp, RL = 200Ω). The KH207 also provides
-3dB bandwidth of 170MHz at a gain of +20, settles to
0.1% in 22ns and slews at a rate of 2400V/µs. The
combination of these features positions the KH207 as
the right choice for high speed applications requiring
exceptional signal purity.
High speed, high resolution A/D and D/A converter
systems requiring low distortion operation will find
the KH207 an excellent choice. Wide dynamic range
systems such as radar and communication receivers
will find that the KH207’s low harmonic distortion and
low noise make it an attractive high speed solution.
The addition of the KH207 to the KH205/206 Series
of high speed operational amplifiers broadens the
selection of features available from which to choose.
The KH205 offers low power operation, the KH206
offers higher drive operation, and the KH207 offers
operation with extremely low distortion, all of which
are pin compatible and overdrive protected.
The KH207 is constructed using thin film resistor/bipolar
transistor technology, and is available in the following
versions:
KH207AI
KH207AK
-25°C to +85°C
-55°C to +125°C
KH207AM -55°C to +125°C
KH207HXC -55°C to +125°C
KH207HXA -55°C to +125°C
12-pin TO-8 can
12-pin TO-8 can, features
burn-in & hermetic testing
12-pin TO-8 can,
environmentally
screened and electrically
tested to MIL-STD-883
SMD#: 5962-9097701HXC
SMD#: 5962-9097701HXA
Typical Performance
Gain Setting
Parameter
+7 +20 +50 -1 -20 -50
-3dB bandwidth
220 170 80 220 130 80
rise time
1.7 2.2 4.7 1.7 2.9 4.7
slew rate
2.4 2.4 2.4 2.4 2.4 2.4
settling time (to 0.1%) 22 22 20 21 20 19
Units
MHz
ns
V/ns
ns
REV. 1A February 2001
|
| |
 
KH207
+Vcc
Rc
12Ω
Q1
(MJE170)
Q3
(2N3906)
to pin 12
to pin 10
0.01ΩF
Rx
14.3kΩ
0.01ΩF
Q2
(MJE180)
Rc
12Ω
Q4
(2N3904)
-Vcc
DATA SHEET
Noise Analysis
Approximate noise figure can be determined for the
KH207 using the Equivalent Input Noise plot on page 3
and the equations shown below.
kT = 4.00 x 10-21 Joules at 290°K
Vn is spot noise voltage (V/√Hz)
in is non-inverting spot noise current (A/√Hz)
ii is inverting spot noise current (A/√Hz)
Rs
+
Rn
KH207
-
Rf
Rg
Ro
Figure 4: Active Current Limit Circuit (50mA)
Controlling Bandwidth and Passband Response
In most applications, a feedback resistor value of 2kΩ
will provide optimum performance; nonetheless, some
applications may require a resistor of some other value.
The response versus Rf plot on the previous page shows
how decreasing Rf will increase bandwidth (and frequency
response peaking, which may lead to instability).
Conversely, large values of feedback resistance tend to
roll off the response.
The best settling time performance requires the use of an
external feedback resistor (use of the internal resistor
results in a 0.1% to 0.2% settling tail). The settling
performance may be improved slightly by adding a
capacitance of 0.4pF in parallel with the feedback
resistor (settling time specifications reflect performance
with an external feedback resistor but with no external
capacitance).
Thermal Model
Tcase
100°C/W
Tj(pnp)
Ppnp
100°C/W
Tj(npn)
Pnpn
17.5°C/W
Tj(circuit)
Pcircuit
θca
+
-
Tambient
Pcircuit = [(+VCC) – (-VCC)]2 / 1.77kΩ
Pxxx = [(±VCC) – Vout – (Icol) (Rcol + 6)] (Icol)
(% duty cycle)
(For positive Vo and VCC, this is the power in the npn output stage.)
(For negative Vo and VCC, this is the power in the pnp output stage.)
θca = 65°C/W in still air without a heatsink.
35°C/W in still air without a Thermalloy 2268.
15°C/W in 300ft/min air with a Thermalloy 2268
(Thermalloy 2240 works equally well.)
Icol = Vout/Rload or 3mA, whichever is greater.
(Include feedback R in Rload.)
Rcol is a resistor (33Ω recommended) between the xxx collector and ±VCC.
Tj (pnp) = Ppnp (100 + θca) + (Pcir + Pnpn)θca + Ta, similar for Tj (npn).
Tj (cir) = Pcir (17.5 + θca) + (Ppnp + Pnpn)θca + Ta.
F
=
10 log
1+
R
R
s
n
+
Rs
4 kT
⋅
i
2
n
+
V
2
n
R
2
p
+
R
2
f
i
2
i
R
2
p
A
2
v
where R p
= Rs Rn
Rs +Rn
;
Av
= Rf
Rg
+1
Figure 5: Noise Figure Diagram and Equations
(Noise Figure is for the Network Inside this Box.)
Driving Cables and Capacitive Loads
When driving cables, double termination is used to
prevent reflections. For capacitive load applications, a
small series resistor at the output of the KH207 will
improve stability and settling performance.
Transmission Line Matching
One method for matching the characteristic impedance
(Zo) of a transmission line or cable is to place the
appropriate resistor at the input or output of the amplifier.
Figure 6 shows typical inverting and non-inverting circuit
configurations for matching transmission lines.
R1 Z0
R3
C6
V1 +-
+
R2
KH207
-
R6
Z0
Vo
R7
R4 Z0
Rg Rf
V2 +-
R5
Figure 6: Transmission Line Matching
Non-inverting gain applications:
s Connect Rg directly to ground.
s Make R1, R2, R6, and R7 equal to Zo.
s Use R3 to isolate the amplifier from reactive
loading caused by the transmission line,
or by parasitics.
REV. 1A February 2001
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for KH207 electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ KH207.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| KH200 | The function is Fast Settling/ Wideband Operational Amplifier. Fairchild Semiconductor | |
| KH200 | The function is Wideband Operational Amplifier. Cadeka |  |
| KH205 | The function is Overdrive-Protected Wideband Op Amp. Fairchild Semiconductor | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
KH20
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||