ADL5330 Analog Devices, Inc., ADL5330 Datasheet

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ADL5330

Manufacturer Part Number
ADL5330
Description
10 Mhz To 3 Ghz Vga With 60 Db Gain Control Range
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Voltage-controlled amplifier/attenuator
Operating frequency 10 MHz to 3 GHz
Optimized for controlling output power
High linearity: OIP3 31 dBm @ 900 MHz
Output noise floor: −150 dBm/Hz @ 900 MHz
50 Ω input and output impedances
Single-ended or differential operation
Wide gain-control range: −34 dB to +22 dB @ 900 MHz
Linear-in-dB gain control function, 20 mV/dB
Single-supply 4.75 V to 5.25 V
APPLICATIONS
Transmit and receive power control at RF and IF
GENERAL DESCRIPTION
The ADL5330 is a high performance, voltage-controlled
variable gain amplifier/attenuator for use in applications with
frequencies up to 3 GHz. The balanced structure of the signal
path minimizes distortion while it also reduces the risk of
spurious feed-forward at low gains and high frequencies caused
by parasitic coupling. While operation between a balanced
source and load is recommended, a single-sided input is
internally converted to differential form.
The input impedance is 50 Ω from INHI to INLO. The outputs
are usually coupled into a 50 Ω grounded load via a 1:1 balun. A
single supply of 4.75 V to 5.25 V is required.
The 50 Ω input system converts the applied voltage to a pair of
differential currents with high linearity and good common
rejection even when driven by a single-sided source. The signal
currents are then applied to a proprietary voltage-controlled
attenuator providing precise definition of the overall gain under
the control of the linear-in-dB interface. The GAIN pin accepts
a voltage from 0 V at minimum gain to 1.4 V at full gain with a
20 mV/dB scaling factor.
Rev. A
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. Trademarks and
registered trademarks are the property of their respective owners.
The output of the high accuracy wideband attenuator is applied
to a differential transimpedance output stage. The output stage
sets the 50 Ω differential output impedances and drives
Pin OPHI and Pin OPLO. The ADL5330 has a power-down
function. It can be powered down by a Logic LO input on the
ENBL pin. The current consumption in power-down mode is
250 μA.
The ADL5330 is fabricated on an ADI proprietary high
performance, complementary bipolar IC process. The ADL5330
is available in a 24-lead (4 mm × 4 mm), Pb-free LFCSP_VQ
package and is specified for operation from ambient
temperatures of −40°C to +85°C. An evaluation board is also
available.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
RFIN
VREF
COM1
INHI
INLO
COM1
VPS1
GAIN
VPS1
60 dB Gain Control Range
10 MHz to 3 GHz VGA with
FUNCTIONAL BLOCK DIAGRAM
CONTROL
STAGE
INPUT
GAIN
VREF
ENBL VPS2
BIAS
AND
IPBS
GM
© 2005 Analog Devices, Inc. All rights reserved.
OPBS
COM1
VPS2
Figure 1.
COM2
VPS2
STAGE
(TZ)
O/P
COM2
VPS2
COM2
COM2
VPS2
OPLO
VPS2
OPHI
ADL5330
www.analog.com
BALUN
RFOUT

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ADL5330 Summary of contents

Page 1

... The output of the high accuracy wideband attenuator is applied to a differential transimpedance output stage. The output stage sets the 50 Ω differential output impedances and drives Pin OPHI and Pin OPLO. The ADL5330 has a power-down function. It can be powered down by a Logic LO input on the ENBL pin. The current consumption in power-down mode is 250 μ ...

Page 2

... ADL5330 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ...................................................................... 12 Applications..................................................................................... 13 Basic Connections ...................................................................... 13 RF Input/Output Interface ........................................................ 14 REVISION HISTORY 6/05—Rev Rev. A Changes to Figure 1.......................................................................... 1 Changes to Table 1............................................................................ 3 Changes to Table 2............................................................................ 5 Changes to Table 3............................................................................ 6 Changes to Figure 27 ...

Page 3

... V (differential output) GAIN Gain = 0 dB, gain = slope (V − intercept) GAIN V = 1.2 V GAIN V = 1.4 V GAIN V = 1.4 V GAIN 20 MHz carrier offset 1.4 V GAIN V = 1.4 V GAIN 1 V < V < 1.4 V GAIN Rev Page ADL5330 Min Typ Max Unit 0.01 3 GHz 50 Ω 50 Ω −35 dB 0.09 dB 20.7 mV/dB 0. ...

Page 4

... ADL5330 Parameter 2200 MHz Gain Control Span Maximum Gain Minimum Gain Gain Flatness vs. Frequency Gain Control Slope Gain Control Intercept Input Compression Point Input Compression Point Output Third-Order Intercept (OIP3) 1 Output Noise Floor Noise Figure 2 Input Return Loss Output Return Loss ...

Page 5

... V section of this specification is not implied. Exposure to absolute VPS1, VPS2 maximum rating conditions for extended periods may affect 2.5 V device reliability. 1.1 W 60°C/W 150°C −40°C to +85°C −65°C to +150°C 300°C Rev Page ADL5330 ...

Page 6

... OPHI 23 ENBL 24 GAIN VPS1 VPS2 1 18 PIN 1 COM1 COM2 2 INDICATOR 17 INHI OPHI 3 16 ADL5330 OPLO INLO 4 15 TOP VIEW COM1 COM2 5 14 (Not to Scale) VPS1 VPS2 6 13 Figure 2. Pin Configuration Descriptions Positive Supply. Nominally equal Common for Input Stage. Differential Inputs, AC-Coupled. ...

Page 7

... Figure 7. Gain and Gain Law Conformance vs. V over Temperature at 2700 MHz 180 160 140 120 100 V GAIN 100 1,000 FREQUENCY (kHz) Figure 8. Frequency Response of Gain Control Input, Carrier Frequency = 900 MHz ADL5330 –3 –6 –9 –12 1.2 1.4 GAIN –3 –6 – ...

Page 8

... ADL5330 40 OIP3 30 20 INPUT P1dB 10 0 –10 OUTPUT P1dB –20 –30 –40 0 0.2 0.4 0.6 0.8 V (V) GAIN Figure 9. Input Compression Point, Output Compression Point, OIP3, and Noise Floor vs. V GAIN INPUT P1dB 10 0 –10 OUTPUT P1dB –20 –30 –40 0 0.2 0.4 0.6 0.8 V (V) GAIN Figure 10. Input Compression Point, Output Compression Point, OIP3, and Noise Floor vs ...

Page 9

... OIP3 (–40°C) OIP3 (+85°C) OP1dB (+85°C) OP1dB (–40°C) OP1dB (+25°C) 0.2 0.4 0.6 0.8 1.0 1.2 V (V) GAIN OIP3 (+85°C) OIP3 (+25°C) OP1dB (+25°C) OP1dB (–40°C) OP1dB (+85°C) 0.2 0.4 0.6 0.8 1.0 1.2 V (V) GAIN TEMP = +85°C TEMP = –40°C 0.2 0.4 0.6 0.8 1.0 1.2 V (V) GAIN Figure 20. Supply Current vs. V and Temperature GAIN ADL5330 1.4 1.4 1.4 ...

Page 10

... ADL5330 18.5 19 19.5 20 20.5 21 21.5 22 22.5 OP1dB (dBm) Figure 21. OP1dB Distribution at 900 MHz at Maximum Gain 9.5 10 10.5 11 11.5 12 12.5 13 13.5 OP1dB (dBm) Figure 22. OP1dB Distribution at 2200 MHz at Maximum Gain 28.5 29.5 30.5 31.5 32.5 OIP3 (dBm) Figure 23. OIP3 Distribution at 900 MHz at Maximum Gain ...

Page 11

... Figure 30. Output Return Loss with ETC1-1-13 Baluns Rev Page ADL5330 90 60 120 450MHz V = 0.2V GAIN V = 1.2V GAIN 3GHz 1.9GHz 240 300 270 Figure 29. Output Impedance (Differential) 600 1100 ...

Page 12

... The outputs of the ADL5330 require external dc bias to the positive supply voltage. This bias is typically supplied through external inductors. The outputs are best taken differentially to ...

Page 13

... The nominal input and output impedance looking into each individual RF input/output pin is 25 Ω. Consequently, the differential impedance is 50 Ω. To enable the ADL5330, the ENBL pin must be pulled high. Taking ENBL low puts the ADL5330 in sleep mode, reducing current consumption to 250 μA at ambient. The voltage on ENBL must be greater than 1 ...

Page 14

... Figure 33 illustrates differential balance at the input and output using a transformer balun. Input and output baluns are recom- mended for optimal performance. Much of the characterization for the ADL5330 was completed using 1:1 baluns at the input and output for single-ended 50 Ω match. Operation using M/A-COM ETC1-1-13 transmission line transformer baluns is recommended for a broadband interface ...

Page 15

... It offers a large detection range with ±0.5 dB tempera- ture stability. This configuration is similar to Figure 36. The gain of the ADL5330 is controlled by the output pin of the AD8318. This voltage, VOUT, has a range near VPOS. To avoid overdrive recovery issues, the AD8318 output voltage can be scaled down using a resistive divider to interface with the ...

Page 16

... SIGNAL DAC 220pF Figure 37. ADL5330 Operating in an Automatic Gain Control Loop in Combination with the AD8318 Figure 38 shows the transfer function of the output power vs. the VSET voltage over temperature for a 900 MHz sine wave with an input power of −1.5 dBm. Note that the power control of the AD8318 has a negative sense ...

Page 17

... MHz carrier offset. A CH1 2.60V Figure 41. AD8349 and ADL5330 Output Power, ACPR, EVM, and Noise vs. The output of the AD8349 driving the ADL5330 should be limited to the range that provides the optimal EVM and ACPR performance. The power range is found by sweeping the output power of the AD8349 to find the best compromise between EVM and ACPR of the system ...

Page 18

... ADL5330 WCDMA TRANSMIT APPLICATION Figure 43 shows a plot of the output spectrum of the ADL5330 transmitting a single-carrier WCDMA signal (Test Model 1-64 at 2140 MHz). The carrier power output is approximately −9.6 dBm. The gain control voltage is equal to 1.4 V giving a gain of approximately 14.4 dB. At this power level, an adjacent channel power ratio of − ...

Page 19

... MHz, three-carrier CDMA2000 test model signal (forward pilot, sync, paging, and six traffic, as per 3GPP2 C.S0010-B, Table 6.5.2.1) was applied to the ADL5330. A cavity- tuned filter with a 4.6 MHz pass band was used to reduce noise from the signal source being applied to the device. ...

Page 20

... Use the INPUT2 SMA to drive one of the differential input pins. The unused pin should be terminated to ground, as shown in Figure 34. The ADL5330 is enabled by applying a logic high voltage to the ENBL pin by placing a jumper across the SW1 header in the O position. Remove the jumper for disable. This pulls the ENBL pin to ground through the 10 kΩ ...

Page 21

... VPS2 COM2 VPS2 GNLO VPS2 COM1 VPS2 OPBS ENBL IPBS GAIN VREF Figure 49. Evaluation Board Schematic Rev Page ADL5330 ...

Page 22

... C11 and C2 are dc blocks. L3 and L4 provide dc biases for the output. SW1, R1, R13 Enable Interface. The ADL5330 is enabled by applying a logic high voltage to the ENBL pin by placing a jumper across SW1 to the O position. Remove the jumper for disable. To exercise the enable function by applying an external high or low voltage, use the pin labeled O on the SW1 header ...

Page 23

... Figure 50. Component Side Silkscreen Figure 51. Circuit Side Silkscreen Figure 52. Component Side Layout Figure 53. Circuit Side Layout Rev Page ADL5330 ...

Page 24

... ADL5330ACPZ-WP −40°C to +85°C 1 ADL5330ACPZ-REEL7 −40°C to +85°C 1 ADL5330ACPZ-R2 −40°C to +85°C ADL5330-EVAL Pb-free part waffle pack. © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 4.00 BSC SQ ...

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