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THS4508 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce THS4508
Description  WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

THS4508 Fiches technique(HTML) 1 Page - Texas Instruments

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FEATURES
APPLICATIONS
DESCRIPTION
THS4508
VIN
R = 75
S
W
VSignal
VS-
VCM
RO
RO
VOUT-
VOUT+
V
= 5 V
S+
175 W
175 W
75 W
130 W
130 W
348 W
348 W
THS4508
SLAS459A – SEPTEMBER 2005 – REVISED FEBRUARY 2006
WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER
To allow for dc coupling to ADCs, its unique output
common-mode control circuit maintains the output
Fully Differential Architecture
common-mode voltage within 5-mV offset (typical)
Common-Mode Input Range Includes the
from the set voltage, when set within 0.5 V of
Negative Rail
mid-supply. The common-mode set point is set to
mid-supply by internal circuitry,
which
may
be
Minimum Gain of 2 V/V (6 dB)
over-driven from an external source.
Bandwidth: 2 GHz
The THS4508 is a high-performance amplifier that
Slew Rate: 6400 V/µs
has been optimized for use in high performance, 5-V
0.1% Settling Time: 2 ns
single supply data acquisition systems. The output
HD2: –72 dBc at 100 MHz
has been optimized for best performance with its
common-mode voltages set to mid supply, and the
HD3: –79 dBc at 100 MHz
input has been optimized for best performance with
OIP2: 78 dBm at 70 MHz
its
common-mode
voltage
set
to
0.7
V.
High
OIP3: 42 dBm at 70 MHz
performance at a low power-supply voltage makes for
high-performance single-supply 5-V data-acquisition
Input Voltage Noise: 2.3 nV/
√Hz (f > 10 MHz)
systems with a minimum parts count. The combined
Noise Figure: 19.2 dB (G = 10 dB)
performance of the THS4508 in a gain of 10-dB
Output Common-Mode Control
driving the ADS5500 ADC, sampling at 125 MSPS, is
5-V Power Supply Current: 39.2 mA
82-dBc SFDR, and 68.3-dBc SNR with a –1-dBFS
signal at 70 MHz.
Power-Down Capability: 0.65 mA
The THS4508 is offered in a Quad 16-pin leadless
QFN package (RGT), and is characterized for
operation over the full industrial temperature range
5-V Data-Acquisition Systems
from –40°C to 85°C.
High Linearity ADC Amplifier
Wireless Communication
Medical Imaging
Test and Measurement
The
THS4508
is
a
wideband,
fully-differential
operational amplifier designed for single-supply 5-V
data-acquisition systems. It has very low noise at 2.3
nV/
√Hz, and extremely low harmonic distortion of –72
dBc HD2 and –79 dBc HD3 at 100 MHz with 2 VPP,
G = 10 dB, and 1-k
Ω load. Slew rate is very high at
Figure 1. Video Buffer
6400 Vµs and with settling time of 2 ns to 0.1% (2 V
step) it is ideal for pulsed applications. It is designed
for minimum gain of 6 dB, but is optimized for gain of
10 dB.
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.
Copyright © 2005–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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