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THS4511 Datasheet

  • THS4511

  • 寬帶、低噪聲、低失真、全差動放大器

  • 38頁

  • TI

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THS4511
www.ti.com
SLOS471 鈥?SEPTEMBER 2005
WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER
FEATURES
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Fully Differential Architecture
Common-Mode Input Range Includes
the Negative Rail
Unity Gain Stable
Bandwidth: 1.6 GHz (Gain = 0 dB)
Slew Rate: 4900 V/碌s
0.1% Settling Time: 3.3 ns
HD
2
: 鈥?2 dBc at 70 MHz
HD
3
: 鈥?7 dBc at 70 MHz
OIP
2
: 76 dBm at 70 MHz
OIP
3
: 42 dBm at 70 MHz
Input Voltage Noise: 2 nV/鈭欻z (f > 10 MHz)
Noise Figure: 21.8 dB (50
鈩?/div>
System, G = 6 dB)
Output Common-Mode Control
5-V Power Supply Current: 39.2 mA
Power-Down Capability: 0.65 mA
DESCRIPTION
The THS4511 is a wideband, fully-differential oper-
ational amplifier designed for single-supply 5-V
data-acquisition systems. It has very low noise at 2
nV/鈭欻z, and extremely low harmonic distortion of 鈥?2
dBc HD
2
and 鈥?7 dBc HD
3
at 70 MHz with 2 Vpp,
G = 0 dB, and 200-鈩?load. Slew rate is very high at
4900 V碌s and with settling time of 3.3 ns to 0.1% (2
V step) it is ideal for pulsed applications. It is
designed for minimum gain of 0 dB.
To allow for dc coupling to ADCs, its unique output
common-mode control circuit maintains the output
common-mode voltage within 5-mV offset (typical)
from the set voltage, when set within
鹵0.5
V of
mid-supply. The common-mode set point is set to
mid-supply by internal circuitry, which may be
over-driven from an external source.
The THS4511 is a high-performance amplifier that
has been optimized for use in 5-V single supply data
acquisition systems. The output has been optimized
for best performance with its common-mode voltages
set to mid supply, and the input has been optimized
for performance over a wide range of common-mode
input voltages. High performance at a low
power-supply voltage enables single-supply 5-V
data-acquisition systems while minimizing component
count.
The THS4511 is offered in a Quad 16-pin leadless
QFN package (RGT), and is characterized for oper-
ation over the full industrial temperature range from
鈥?0擄C to 85擄C.
Video Buffer, Single-Ended to Differential
Video Source
R
S
= 75
W
V
Signal
V
IN
175
W
130
W
348
W
V
S+
= 5 V
R
O
-
APPLICATIONS
5-V Data-Acquisition Systems
High Linearity ADC Amplifier
Wireless Communication
Medical Imaging
Test and Measurement
RELATED PRODUCTS
Device
THS4508
THS4509
THS4511
THS4513
Min. Gain
6 dB
6 dB
0 dB
0 dB
Common Mode Range
of Input*
鈥?.3V to 2.3V
0.75V to 4.25V
鈥?.3V to 2.3V
0.75V to 4.25V
*Note: Assumes a 5V single-ended power supply
175
W
75
W
130
W
V
S-
THS4511
R
O
V
OD
+
V
CM
= 2.5 V
348
W
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2005, Texas Instruments Incorporated

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