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| 型號： | AD8260-EVALZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/32頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD8260 |
| 標準包裝： | 1 |
| 每 IC 通道數： | 1 - 單 |
| 放大器類型： | 可變增益 |
| 輸出類型： | 差分 |
| 轉換速率： | 730 V/µs |
| -3db帶寬： | 195MHz |
| 電流 - 輸出 / 通道： | 310mA |
| 工作溫度： | -40°C ~ 105°C |
| 電流供應（主 IC）： | 28.3mA |
| 電壓 - 電源，單路/雙路(±)： | 3.3 V ~ 10 V，±3.3 V ~ 5 V |
| 板類型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | AD8260 |
| 產品目錄頁面： | 775 (CN2011-ZH PDF) |
| 相關產品： | AD8260ACPZ-R7DKR-ND - IC AMP VGA DIFF LN 310MA 32LFCSP AD8260ACPZ-R7CT-ND - IC AMP VGA DIFF LN 310MA 32LFCSP AD8260ACPZ-R7TR-ND - IC AMP VGA DIFF LN 310MA 32LFCSP AD8260ACPZ-WP-ND - IC AMP VGA DIFF LN 310MA 32LFCSP AD8260ACPZ-RL-ND - IC AMP VGA DIFF LN 310MA 32LFCSP |
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High Current Driver Amplifier and
Digital VGA/Preamplifier with 3 dB Steps
AD8260
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
Fax: 781.461.3113
2008–2011 Analog Devices, Inc. All rights reserved.
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
FUNCTIONAL BLOCK DIAGRAM
32
2
3
6
31
30
1.5k
1k
29
28
27
26
25
1k
1.5k
GM
HIGH CURRENT DRIVER
9
24
23
22
21
VMID
4
1
AD8260
VMDO
TXEN
VMDI
VNCM
VPSB
ENBL
VGAP
VGAN
VNGR VPSR GNS3 GNS2 GNS1 GNS0 PRAO VNGR
VOCM INPP INRP INRN INPN TXFB VNEG
VNEG
TXOP
VPOS
VPSR
VMDO
PRAI
FDBK
07192-
001
5
7
8
10
11
12
13
14
16
15
17
18
19
20
BIAS
VGA/PREAMPLIFIER
ATTENUATOR
GM STAGES
LOGIC
×1
+
–
Figure 1. Functional Block Diagram
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
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.
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| AD8264ACPZ | 功能描述:IC AMP VGA DIFF QUAD LN 40LFCSP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
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