kh231 Fairchild Semiconductor, kh231 Datasheet

no-image

kh231

Manufacturer Part Number
kh231
Description
Fast Settling, Wideband Buffer/amplifier Av = 1 To 5
Manufacturer
Fairchild Semiconductor
Datasheet
KH231
Fast Settling, Wideband Buffer/Amplifier (A v = ±1 to ±5)
Features
s
s
s
s
s
s
Applications
s
s
s
s
Pins 2 and 8 are used to adjust the supply current or to adjust the off-
set voltage (see text). These pins are normally left unconnected.
Typical Performance
Parameter
-3dB bandwidth
rise time (2V)
slew rate
settling time (to 0.1%)
165MHz closed-loop – -3dB bandwidth
15ns settling to 0.05%
1mV input offset voltage, 10µV/°C drift
100mA output current
Excellent AC and DC linearity
Direct replacement for CLC231
Driving flash A/D converters
Precision line driving
(a gain of 2 cancels matched-line losses)
DAC current-to-voltage conversion
Low-power, high-speed applications (50mW @ ±5V)
Non-Inverting
Connected
Small Signal Pulse Response
Inverting
Input
Input
Not
ground
ground
Case
Case
NC
V+
V-
Bottom View
6
5
4
180 165 130 165 150 115
1.8 2.0 2.5 2.0 2.2 2.9
2.5 3.0 3.0 3.0 3.0 3.0
12
Time (5ns/div)
1
GND
GND
7
3
A
A
I
I
CC
CC
+
v
-
v
12
Adjust
Adjust
= -2
2
= 2
Adjust
Adjust
8
2
Gain Setting
+V
-V
12
9
1
CC
5
4
4
CC
+V
-V
10
11
12
CC
Supply
Voltage
CC
Supply
Voltage
12
-1
V
o
Collector
Supply
Collector
Supply
Output
12
-2
15
-5
Units
MHz
V/ns
ns
ns
General Description
The KH231 Buffer/Amplifier is a wideband operational
amplifier designed specifically for high-speed, low-
gain applications. The KH231 is based on a current
feedback op amp topology-a unique design that both
eliminates the gain-bandwidth tradeoff and permits
unprecedented high-speed performance. (See table below.)
The KH231 Buffer/Amplifier is the ideal design alter-
native to low precision open-loop buffers and oscillation-
prone conventional op amps. The KH231 offers precise
gains from ±1.000 to ±-5.000 and linearity that is a
true 0.1%-even for demanding 50Ω loads. Open-loop
buffers, on the other hand, offer a nominal gain of
0.95 ±0.03 and a linearity of only 3% for typical loads.
A buffer’s settling time may look impressive but it is
usually specified at unrealistically large load resis-
tances or when the effects of thermal tail are not
included; the KH231 Buffer/Amplifier settles to 0.05%
in 15ns-while driving a 100Ω load.
Offsets and drifts, usually a low priority in conven-
tional high-speed op amp designs, were not ignored
in the KH231; the input offset voltage is typically 1mV
and input offset voltage drift is only 10µV/°C. The
KH231 is stable and oscillation-free across the entire
gain range and since it’s internally compensated, the
user is saved the trouble of designing external com-
pensation networks and having to “tweak” them in
production. The absence of a gain-bandwidth trade-
off in the KH231 allows performance to be predicted
easily; the table below shows how the bandwidth is
affected very little by changing the gain setting.
The KH231 is constructed using thin film resistor/bipolar
transistor technology, and is available in the following
versions:
The KH231 is constructed using thin film resistor/bipolar
transistor technology, and available in these versions:
KH231AI
KH231AK
KH231AM
KH231HXC
KH231HXA
-25°C to +85°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
-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#: 5962-8959401HXC
SMD#: 5962-8959401HXA
www.fairchildsemi.com
REV. 1A February 2001

Related parts for kh231

kh231 Summary of contents

Page 1

... Offsets and drifts, usually a low priority in conven- tional high-speed op amp designs, were not ignored in the KH231; the input offset voltage is typically 1mV and input offset voltage drift is only 10µV/°C. The KH231 is stable and oscillation-free across the entire gain range and since it’ ...

Page 2

... DATA SHEET KH231 Electrical Characteristics PARAMETERS Ambient Temperature Ambient Temperature FREQUENCY DOMAIN RESPONSE -3dB bandwidth (note 2) ¦ large-signal bandwidth gain flatness (note 2) peaking ¦ peaking ¦ rolloff ¦ group delay linear phase deviation reverse isolation non-inverting inverting TIME DOMAIN RESPONSE rise and fall time settling time to 0 ...

Page 3

... KH231 KH231 Typical Performance Characteristics Non-Inverting Frequency Response Gain Phase 100 Frequency (MHz) Bandwidth vs 1.2 1.0 Pins 1 and 2 Shorted Pins 8 and 9 shorted 0.8 0.6 0 ±V (V) CC 2nd and 3rd Harmonic Distortion Intercept ...

Page 4

... The KH231 Buffer/Amplifier is based on the current feed- back op amp topology, a design that uses current feed- back instead of the usual voltage feedback. The use of the KH231 is basically the same as that of the conventional op amp (see Figures 1 and 2). Since the device is designed specifically for low gain applications, the best performance is obtained when the circuit is used at gains between ± ...

Page 5

... T case forced air convection. ° θ C/W ca Low The KH231 is designed to operate on supplies as low as j(circuit) + ±5V. In order to improve full bandwidth at reduced sup- circuit - ply voltages, the supply current (I T ambient The plot of Bandwidth vs. V ing pins 1 and 2 and pins 8 and 9; this will increase both bandwidth and supply current. Care should be taken to = 16mA at ± ...

Page 6

... DATA SHEET KH231 Package Dimensions φ SYMBOL A φb φD φ α DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICES TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...

Related keywords