SPT231AIH [FAIRCHILD]
Operational Amplifier, 1 Func, 4500uV Offset-Max, BIPolar, MBCY12, TO-8;
| 型号： | SPT231AIH |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Operational Amplifier, 1 Func, 4500uV Offset-Max, BIPolar, MBCY12, TO-8 放大器 |
| 文件： | 总4页 (文件大小：332K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST SETTLING, WIDEBAND BUFFER/AMPLIFIER (A = ±1 to ±5)
V
General Description
Features
The SPT231 Buffer/Amplifier is a wideband operational amplifier
designed specifically for high-speed, low-gain applications. The
SPT231 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.)
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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
The SPT231 Buffer/Amplifier is the ideal design alternative to low
precision open-loop buffers and oscillation-prone conventional op
amps. The SPT231 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 resistances or when the effects of
thermal tail are not included; the SPT231 Buffer/Amplifier settles
to 0.05% in 15ns-while driving a 100Ω load.
Applications
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Driving flash A/D converters
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Precision line driving
(a gain of 2 cancels matched-line losses)
DAC current-to-voltage conversion
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Low-power, high-speed applications
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(50mW @ ±5V)
Offsets and drifts, usually a low priority in conventional high-
speed op amp designs, were not ignored in the SPT231; the input
offset voltage is typically 1mV and input offset voltage drift is only
10µV/°C. The SPT231 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 compensation networks
and having to “tweak” them in production. The absence of a gain-
bandwidth tradeoff in the SPT231 allows performance to be
predicted easily; the table below shows how the bandwidth is
affected very little by changing the gain setting.
Bottom View
The SPT231 is constructed using thin film resistor/bipolar transis-
tor technology, and is available in the following versions:
SPT231AIH
-25°C to +85°C 12-pin TO-8 can
SPT231AMH -55°C to +125°C 12-pin TO-8 can, features burn-
in and hermetic testing
Typical Performance
Package Dimensions
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300 FAX: (719) 528-2370 Website: http://www.spt.com E-Mail: sales@spt.com
(A = +2, Vcc = ±15V, RL = 100Ω, R = 250Ω; unless specified)
SPT231 Electrical Characteristics
v
f
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
Absolute Maximum Ratings
SPT231
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10/9/98
(TA = 25°, A = +2, V = ±15V, R = 100Ω; unless specified)
SPT231 Typical Performance Characteristics
v
CC
L
SPT231
3
10/9/98
Signal Processing Technologies, Inc. reserves the right to change products and specifications without notice. Permission is hereby expressly granted to copy this literature
for informational purposes only. Copying this material for any other use is strictly prohibited. WARNING - LIFE SUPPORT APPLICATIONS POLICY - SPT products should
not be used within Life Support Systems without the specific written consent of SPT. A Life Support System is a product or system intended to support or sustain life which,
if it fails, can be reasonably expected to result in significant personal injury or death.
SPT231
4
10/9/98
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