参数资料
| 型号： | AD604ANZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/33页 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA DUAL ULN 40MA 24DIP |
| 标准包装： | 15 |
| 系列： | X-AMP® |
| 放大器类型： | 可变增益 |
| 电路数： | 2 |
| 转换速率： | 170 V/µs |
| -3db带宽： | 40MHz |
| 电流 - 输入偏压： | 400nA |
| 电流 - 电源： | 32mA |
| 电流 - 输出 / 通道： | 40mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
| 配用： | AD604-EVALZ-ND - BOARD EVAL FOR AD604 AMP |
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Dual, Ultralow Noise
Variable Gain Amplifier
AD604
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
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
www.analog.com
Fax: 781.461.3113
1996–2010 Analog Devices, Inc. All rights reserved.
FEATURES
Ultralow input noise at maximum gain
0.80 nV/√Hz, 3.0 pA/√Hz
2 independent linear-in-dB channels
Absolute gain range per channel programmable
0 dB to 48 dB (preamplifier gain = 14 dB) through 6 dB to
54 dB (preamplifier gain = 20 dB)
±1.0 dB gain accuracy
Bandwidth: 40 MHz (3 dB)
Input resistance: 300 kΩ
Variable gain scaling: 20 dB/V through 40 dB/V
Stable gain with temperature and supply variations
Single-ended unipolar gain control
Power shutdown at lower end of gain control
Drive ADCs directly
APPLICATIONS
Ultrasound and sonar time-gain controls
High performance AGC systems
Signal measurement
FUNCTIONAL BLOCK DIAGRAM
00
540
-0
01
OUTx
VOCM
PAOx
PAIx
VGNx
VREF
AFA
FBKx
COMx
FIXED GAIN
AMPLIFIER
34.4dB
+DSXx
–DSXx
0dB TO –48.4dB
DIFFERENTIAL
PASSIVE INPUT
ATTENUATOR
R-1.5R
LADDER
NETWORK
GAIN CONTROL
AND SCALING
40
32
8
AD604
Figure 1.
GENERAL DESCRIPTION
The AD604 is an ultralow noise, very accurate, dual-channel,
linear-in-dB variable gain amplifier (VGA) optimized for time-
based variable gain control in ultrasound applications; however,
it supports any application requiring low noise, wide bandwidth,
variable gain control. Each channel of the AD604 provides a
300 kΩ input resistance and unipolar gain control for ease of
use. User-determined gain ranges, gain scaling (dB/V), and dc
level shifting of output further optimize performance.
Each channel of the AD604 uses a high performance
preamplifier that provides an input-referred noise voltage of
0.8 nV/√Hz. The very accurate linear-in-dB response of the
AD604 is achieved with the differential input exponential
amplifier (DSX-AMP) architecture. Each DSX-AMP comprises
a variable attenuator of 0 dB to 48.36 dB followed by a high
speed fixed-gain amplifier. The attenuator is a 7-stage
R-1.5R ladder network. The attenuation between tap points is
6.908 dB and 48.36 dB for the ladder network.
The equation for the linear-in-dB gain response is
G (dB) =
(Gain Scaling (dB/V) × VGN (V)) + (Preamp Gain (dB) – 19 dB)
Preamplifier gains between 5 and 10 (14 dB and 20 dB) provide
overall gain ranges per channel of 0 dB through 48 dB and 6 dB
through 54 dB. The two channels of the AD604 can be cascaded
to provide greater levels of gain range by bypassing the preamplifier
of the second channel. However, in multiple channel systems,
cascading the AD604 with other devices in the AD60x VGA
family that do not include a preamplifier may provide a more
efficient solution. The AD604 provides access to the output of
the preamplifier, allowing for external filtering between the
preamplifier and the differential attenuator stage.
Note that scale factors up to 40 dB/V are achievable with reduced
accuracy for scales above 30 dB/V. The gain scales linearly in
decibels with control voltages of 0.4 V to 2.4 V with the 20 dB/V
scale. Below and above this gain control range, the gain begins
to deviate from the ideal linear-in-dB control law. The gain
control region below 0.1 V is not used for gain control. When
the gain control voltage is <50 mV, the amplifier channel is
powered down to 1.9 mA.
The AD604 is available in 24-lead SSOP, SOIC, and PDIP
packages and is guaranteed for operation over the 40°C to
+85°C temperature range.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD604AR | 功能描述:IC AMP VGA DUAL ULN 40MA 24SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
| AD604AR-REEL | 功能描述:IC AMP VGA DUAL ULN 40MA 24SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
| AD604ARS | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Dual 24-Pin SSOP Tube 制造商:Analog Devices 功能描述:SEMICONDUCTOR ((NW)) |
| AD604ARS-REEL | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Dual 24-Pin SSOP T/R |
| AD604ARS-REEL7 | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Dual 24-Pin SSOP T/R |
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