datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD8260 Datasheet

High Current Driver Amplifier and Digital VGA/Preamplifier

No Preview Available !

AD8260 pdf
Data Sheet
High Current Driver Amplifier and
Digital VGA/Preamplifier with 3 dB Steps
AD8260
FEATURES
High current driver
Differential input—direct drive from DAC
Preset gain: 1.5×
−3 dB bandwidth: 195 MHz
Large output drive: >±300 mA
VGA/preamplifier
Low noise
Voltage noise: 2.4 nV/√Hz
Current noise: 5 pA/√Hz
−3 dB bandwidth: 230 MHz
Gain range: 30 dB in 3 dB steps
−6 dB to +24 dB (for preamplifier gain of 6 dB)
Single-ended preamplifier input and differential VGA
output
Supplies: 3.3 V to 10 V (with VMID enabled)
±3.3 V to ±5 V (with VMID disabled)
Power: 93 mW with 3.3 V supplies
Power-down for VGA, driver amplifier, and system
APPLICATIONS
Digital AGC systems
Tx/Rx signal processing
Power line transceivers
GENERAL DESCRIPTION
The AD8260 includes a high current driver, usable as a
transmitter, and a low noise digitally programmable variable
gain amplifier (DGA), useable as a receiver.
The receiver section consists of a single-ended input preampli-
fier, and linear-in-dB, differential-output DGA. The receiver has
a small signal –3 dB bandwidth of 230 MHz; the driver small
signal bandwidth is 195 MHz. The driver delivers ±300 mA,
well suited for driving low impedance loads, even when
connected to a 3.3 V supply.
The AD8260 DGA is ideal for trim applications and has a gain
span of 30 dB, in 3 dB steps. Excellent bandwidth uniformity is
maintained across the entire frequency range. The low output-
referred noise of the DGA is advantageous in driving high
speed ADCs. The differential output facilitates the interface to
modern low voltage high speed ADCs.
Single-supply and dual-supply operation makes the part versatile
and enables gain control of negative-going pulses, such as those
generated by photodiodes or photo-multiplier tubes, as well as
processing band-pass signals on a single supply. For maximum
FUNCTIONAL BLOCK DIAGRAM
VOCM INPP INRP INRN INPN TXFB VNEG VNEG
32 31 30 29 28 27 26 25
1.5k1k
1k1.5k
VMDO 1
TXEN 2
VMDI 3
VNCM 4
VPSB 5
ENBL 6
VGAP 7
VGAN 8
VMID
+–
GM
×1
HIGH CURRENT DRIVER
AD8260
BIAS
VGA/PREAMPLIFIER
ATTENUATOR
GM STAGES
LOGIC
24 TXOP
23 TXOP
22 VPOS
21 VPOS
20 VPSR
19 VMDO
18 PRAI
17 FDBK
9 10 11 12 13 14 15 16
VNGR VPSR GNS3 GNS2 GNS1 GNS0 PRAO VNGR
Figure 1. Functional Block Diagram
dynamic range, it is essential that the part be ac-coupled when
operating on a single supply.
The AD8260 preamplifier (PrA) is configured with external
resistors for gains greater than 6 dB and can be inverting or
noninverting. The DGA is characterized with a noninverting
preamplifier gain of 2×. The attenuator has a range of 30 dB and
the output amplifier has a gain of 8× (18.06 dB). The lowest
noninverting gain range is −6 dB to +24 dB and shifts up with
increased preamplifier gain. The gain is controlled via a parallel
port (Pin GNS0 to Pin GNS3) with 10 gain steps of 3 dB per
code. The preamplifier and DGA are disabled for any code that
is not assigned a gain step.
The AD8260 can operate with single or dual supplies from 3.3 V
to ±5 V. An internal buffer normally provides a split supply
reference for single-supply operation; an external reference can
also be used when the VMID buffer is shut down.
The operating temperature range is −40°C to +105°C. The
AD8260 is available in a 5 mm × 5 mm, 32-lead LFCSP.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2008–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD8260 Datasheet

High Current Driver Amplifier and Digital VGA/Preamplifier

No Preview Available !

AD8260 pdf
AD8260* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Evaluation Kits
• AD8260 Evaluation Board
Documentation
Data Sheet
• AD8260: High Current Driver Amplifier and Digital VGA/
Preamplifier with 3 dB Steps Data Sheet
Design Resources
• AD8260 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD8260 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
Technical Support
Submit a technical question or find your regional support
number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.


Part Number AD8260
Description High Current Driver Amplifier and Digital VGA/Preamplifier
Maker Analog Devices
Total Page 30 Pages
PDF Download
AD8260 pdf
AD8260 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 AD826 Low-Power Dual Operational Amplifier Analog Devices
Analog Devices
AD826 pdf
2 AD8260 High Current Driver Amplifier and Digital VGA/Preamplifier Analog Devices
Analog Devices
AD8260 pdf
3 AD8264 DC Coupled VGA And Differential Output Amplifier Analog Devices
Analog Devices
AD8264 pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy