http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD605 Datasheet

Dual/ Low Noise/ Single-Supply Variable Gain Amplifier

No Preview Available !

AD605 pdf
www.DataSheet4U.com
a
FEATURES
Two Independent Linear-in-dB Channels
Input Noise at Maximum Gain: 1.8 nV/Hz, 2.7 pA/Hz
Bandwidth: 40 MHz (–3 dB)
Differential Input
Absolute Gain Range Programmable:
–14 dB to +34 dB (FBK Shorted to OUT) Through
0 dB to +48 dB (FBK Open)
Variable Gain Scaling: 20 dB/V Through 40 dB/V
Stable Gain with Temperature and Supply Variations
Single-Ended Unipolar Gain Control
Output Common-Mode Independently Set
Power Shutdown at Lower End of Gain Control
Single 5 V Supply
Low Power: 90 mW/Channel
Drives A/D Converters Directly
APPLICATIONS
Ultrasound and Sonar Time-Gain Control
High Performance AGC Systems
Signal Measurement
Dual, Low Noise, Single-Supply
Variable Gain Amplifier
AD605
FUNCTIONAL BLOCK DIAGRAM
VGN
VREF
GAIN
CONTROL
AND
SCALING
PRECISION PASSIVE
INPUT ATTENUATOR
+IN DIFFERENTIAL
ATTENUATOR
–IN 0 TO –48.4dB
FIXED GAIN
AMPLIFIER
+34.4dB
OUT
FBK
VOCM
AD605
GENERAL DESCRIPTION
The AD605 is a low noise, accurate, dual channel, linear-in-dB
variable gain amplifier, which is optimized for any application
requiring high performance, wide bandwidth variable gain con-
trol. Operating from a single 5 V supply, the AD605 provides
differential inputs and unipolar gain control for ease of use.
Added flexibility is achieved with a user-determined gain range
and an external reference input which provides user-determined
gain scaling (dB/V).
The high performance linear-in-dB response of the AD605 is
achieved with the differential input, single supply, exponential
amplifier (DSX-AMP) architecture. Each of the DSX-AMPs
comprise a variable attenuator of 0 dB to –48.4 dB followed by
a high speed fixed gain amplifier. The attenuator is based on a
7-stage R-1.5R ladder network. The attenuation between tap
points is 6.908 dB, and 48.360 dB for the entire ladder network.
The DSX-AMP architecture results in 1.8 nV/Hz input noise
spectral density and will accept a ± 2.0 V input signal when
VOCM is biased at VP/2.
Each independent channel of the AD605 provides a gain range
of 48 dB which can be optimized for the application. Gain
ranges between –14 dB to +34 dB and 0 dB to +48 dB can be
selected by a single resistor between pins FBK and OUT. The
lower and upper gain ranges are determined by shorting pin
FBK to OUT, or leaving pin FBK unconnected, respectively.
The two channels of the AD605 can be cascaded to provide 96
dB of very accurate gain range in a monolithic package.
The gain control interface provides an input resistance of approxi-
mately 2 Mand scale factors from 20 dB/V to 30 dB/V for a
VREF input voltage of 2.5 V to 1.67 V, respectively. Note that
scale factors up to 40 dB/V are achievable with reduced accu-
racy for scales above 30 dB/V. The gain scales linearly in dB
with control voltages (VGN) of 0.4 V to 2.4 V for the 20 dB/V
scale and 0.20 V to 1.20 V for the 40 dB/V scale. When VGN
is <50 mV the amplifier is powered down to draw 1.9 mA.
Under normal operation, the quiescent supply current of each
amplifier channel is only 18 mA.
The AD605 is available in 16-lead PDIP and SOIC, and is
guaranteed for operation over the –40°C to +85°C tempera-
ture range.
REV. C
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

AD605 Datasheet

Dual/ Low Noise/ Single-Supply Variable Gain Amplifier

No Preview Available !

AD605 pdf
www.DataSheet4U.com
AD605–SPECIFICATIONS (Each channel @ TA = 25؇C, VS = 5 V, RS = 50 , RL = 500 , CL = 5 pF, VREF = 2.5 V
(Scaling = 20 dB/V), –14 dB to +34 dB gain range, unless otherwise noted.)
Model
Parameter
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Peak Input Voltage
Input Voltage Noise
Input Current Noise
Noise Figure
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
–3 dB Bandwidth
Slew Rate
Output Signal Range
Output Impedance
Output Short-Circuit Current
Harmonic Distortion
HD2
HD3
HD2
HD3
Two-Tone Intermodulation
Distortion (IMD)
1 dB Compression Point
Third Order Intercept
Channel-to-Channel Crosstalk
Group Delay Variation
VOCM Input Resistance
ACCURACY
Absolute Gain Error
–14 dB to –11 dB
–11 dB to +29 dB
+29 dB to +34 dB
Gain Scaling Error
Output Offset Voltage
Output Offset Variation
GAIN CONTROL INTERFACE
Gain Scaling Factor
Gain Range
Input Voltage (VGN) Range
Input Bias Current
Input Resistance
Response Time
POWER SUPPLY
Supply Voltage
Power Dissipation
VREF Input Resistance
Quiescent Supply Current
Power Down
Power-Up Response Time
Power-Down Response Time
Conditions
AD605A
Min Typ
Max
At Minimum Gain
VGN = 2.9 V
VGN = 2.9 V
RS = 50 , f = 10 MHz, VGN = 2.9 V
RS = 200 , f = 10 MHz, VGN = 2.9 V
f = 1 MHz, VGN = 2.65 V
175 ± 40
3.0
2.5 ± 2.5
1.8
2.7
8.4
12
–20
Constant with Gain
VGN = 1.5 V, Output = 1 V Step
RL 500
f = 10 MHz
VGN = 1 V, VOUT = 1 V p-p,
f = 1 MHz
f = 1 MHz
f = 10 MHz
f = 10 MHz
RS = 0 , VGN = 2.9 V, VOUT = 1 V p-p
f = 1 MHz
f = 10 MHz
f = 10 MHz, VGN = 2.9 V, Output Referred
f = 10 MHz, VGN = 2.9 V, VOUT = 1 V p-p,
Input Referred
Ch1: VGN = 2.65 V, Inputs Shorted,
Ch2: VGN = 1.5 V (Mid Gain), f = 1 MHz,
VOUT = 1 V p-p
1 MHz < f < 10 MHz, Full Gain Range
40
170
2.5 ± 1.5
2
± 40
–64
–68
–51
–53
–72
–60
+15
–1
–70
± 2.0
45
0.25 V < VGN < 0.40 V
0.40 V < VGN < 2.40 V
2.40 V < VGN < 2.65 V
0.4 V < VGN < 2.4 V
VREF = 2.500 V, VOCM = 2.500 V
VREF = 2.500 V, VOCM = 2.500 V
VREF = 2.5 V, 0.4 V < VGN < 2.4 V
VREF = 1.67 V
FBK Short to OUT
FBK Open
20 dB/V, VREF = 2.5 V
48 dB Gain Change
VPOS
VPOS, VGN < 50 mV
48 dB Gain, VOUT = 2 V p-p
–1.2 +1.0
–1.0 ± 0.3
–3.5 –1.25
± 0.25
–50 ± 30
30
+3.0
+1.0
+1.2
50
95
19 20
21
30
–14 – +34
0 – +48
0.1 – 2.9
–0.4
2
0.2
4.5 5.0
90
10
18
1.9
0.6
0.4
5.5
23
3.0
AD605B
Min Typ
Max Unit
175 ± 40
3.0
2.5 ± 2.5
1.8
2.7
8.4
12
–20
pF
V
nV/Hz
pA/Hz
dB
dB
dB
40
170
2.5 ± 1.5
2
± 40
–64
–68
–51
–53
–72
–60
+15
–1
–70
MHz
V/µs
V
mA
dBc
dBc
dBc
dBc
dBc
dBc
dBm
dBm
dB
± 2.0
45
ns
k
–1.2 +0.75
–1.0 ± 0.2
–3.5 –1.25
± 0.25
–50 ± 30
30
+3.0
+1.0
+1.2
50
50
dB
dB
dB
dB/V
mV
mV
19 20
21
30
–14 – +34
0 – +48
0.1 – 2.9
–0.4
2
0.2
dB/V
dB/V
dB
dB
V
µA
M
µs
4.5 5.0
90
10
18
1.9
0.6
0.4
5.5 V
mW
k
23 mA
3.0 mA
µs
µs
–2– REV. C


Part Number AD605
Description Dual/ Low Noise/ Single-Supply Variable Gain Amplifier
Maker Analog Devices
Total Page 12 Pages
PDF Download
AD605 pdf
Download PDF File
AD605 pdf
View for Mobile



Buy Electronic Components




Related Datasheet

1 AD600 Dual/ Low Noise/ Wideband Variable Gain Amplifiers Analog Devices
Analog Devices
AD600 pdf
2 AD602 Dual/ Low Noise/ Wideband Variable Gain Amplifiers Analog Devices
Analog Devices
AD602 pdf
3 AD6025GP Fan ADDA
ADDA
AD6025GP pdf
4 AD603 Variable Gain Amplifier Analog Devices
Analog Devices
AD603 pdf
5 AD604 Dual/ Ultralow Noise Variable Gain Amplifier Analog Devices
Analog Devices
AD604 pdf
6 AD605 Dual/ Low Noise/ Single-Supply Variable Gain Amplifier Analog Devices
Analog Devices
AD605 pdf
7 AD606 80 dB Demodulating Logarithmic Amplifier Analog Devices
Analog Devices
AD606 pdf
8 AD607 Low Power Mixer/AGC/RSSI 3 V Receiver IF Subsystem Analog Devices
Analog Devices
AD607 pdf
9 AD608 Low Power Mixer/Limiter/RSSI 3 V Receiver IF Subsystem Analog Devices
Analog Devices
AD608 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