THS4511 Datasheet, PDF (1/35 Pages) Texas Instruments – WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER

THS4511
www.ti.com
SLOS471E – SEPTEMBER 2005 – REVISED NOVEMBER 2009
WIDEBAND, LOW-NOISE, LOW-DISTORTION,
FULLY-DIFFERENTIAL AMPLIFIER
Check for Samples: THS4511
FEATURES
1
•2 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/µs
• 1% Settling Time: 3.3 ns
• HD₂: –72 dBc at 70 MHz
• HD₃: –87 dBc at 70 MHz
• OIP₂: 76 dBm at 70 MHz
• OIP₃: 42 dBm at 70 MHz
• Input Voltage Noise: 2 nV/√Hz (f > 10 MHz)
• Noise Figure: 21.8 dB (50-Ω System, G = 6 dB)
• Output Common-Mode Control
• 5-V Power-Supply Current: 39.2 mA
• Power-Down Capability: 0.65 mA
APPLICATIONS
• 5-V Data-Acquisition Systems
• High Linearity ADC Amplifiers
• Wireless Communication
• Medical Imaging
• Test and Measurement
RELATED PRODUCTS
DEVICE
THS4508
THS4509
THS4511
THS4513
COMMON-MODE RANGE OF
MIN. GAIN INPUT⁽¹⁾
6 dB –0.3 V to 2.3 V
6 dB 0.75 V to 4.25 V
0 dB –0.3 V to 2.3 V
0 dB 0.75 V to 4.25 V
1. Assumes a 5-V single-ended power supply.
DESCRIPTION
The THS4511 is a wideband, fully-differential
operational amplifier designed for single-supply 5-V
data-acquisition systems. It has very low noise at
2 nV/√Hz, and extremely low harmonic distortion of
–72 dBc HD₂ and –87 dBc HD₃ at 70 MHz with 2 V_PP,
G = 0 dB, and 200-Ω load. Slew rate is very high at
4900 Vµs and with settling time of 3.3 ns to 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 analog-to-digital
converters (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 ±0.5 V of midsupply. The
common-mode set point is set to midsupply 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 midsupply, 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
operation over the full industrial temperature range
from –40°C to +85°C.
Video Buffer, Single-Ended to Differential
Video Source
R_S = 75 W V_IN
175 W
V_Signal
130 W
75 W
175 W
130 W
348 W
V_S+ = 5 V
THS4511
V_S-
V_CM = 2.5 V
R_O
-
R_O ^VOD
+
348 W
1
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.
PowerPAD is a trademark of Texas Instruments Incorporated.
2
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 © 2005–2009, Texas Instruments Incorporated