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100 MHz to 2.7 GHz RF Gain Block AD8354
FEATURES Fixed Gain of 20 dB Operational Frequency of 100 MHz to 2.7 GHz Linear Output Power-Up to 4 dBm Input/Output Internally Matched to 50 Temperature and Power Supply Stable Noise Figure 4.2 dB Power Supply 3 V or 5 V APPLICATIONS VCO Buffers General Tx/Rx Amplification Power Amplifier Predriver Low Power Antenna Driver FUNCTIONAL BLOCK DIAGRAM
BIAS AND VREF VPOS
INPT
VOUT
COM1
AD8354
COM2
GENERAL DESCRIPTION
The AD8354 is a broadband, fixed-gain linear amplifier that operates at frequencies from 100 MHz up to 2.7 GHz. It is intended for use in a wide variety of wireless devices including cellular, broadband, CATV, and LMDS/MMDS applications. By taking advantage of Analog Devices' high performance complementary Si bipolar process, these gain blocks provide excellent stability over process, temperature, and power supply. This amplifier is single-ended and internally matched to 50 with a return loss of greater than 10 dB over the full operating frequency range. The AD8354 provides linear output power of nearly 4.3 dBm with 20 dB of gain at 900 MHz when biased at 3 V and an external RF choke is connected between the power supply and the output pin. The dc supply current is 24 mA. At 900 MHz, the output third order intercept (OIP3) is greater than 18 dBm; at 2.7 GHz, the OIP3 is 14 dBm.
The noise figure is 4.2 dB at 900 MHz. The reverse isolation (S12) is -33 dB at 900 MHz. The AD8354 can also operate with a 5 V power supply, in which case no external inductor is required. Under these conditions, the AD8354 delivers 4.8 dBm with 20 dB of gain at 900 MHz. The dc supply current is 26 mA. At 900 MHz, the OIP3 is greater than 19 dBm, and at 2.7 GHz, the OIP3 is 15 dBm. The noise figure is 4.4 dB at 900 MHz. The reverse isolation (S12) is -33 dB. The AD8354 is fabricated on Analog Devices' proprietary, high performance 25 GHz Si complementary bipolar IC process. The AD8354 is available in a chip scale package that utilizes an exposed paddle for excellent thermal impedance and low impedance electrical connection to ground. It operates over a -40C to +85C temperature range. An evaluation board is available.
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. 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 companies.
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 (c) 2003 Analog Devices, Inc. All rights reserved.
(V = V, T = 25 C, 100 AD8354-SPECIFICATIONS unless3otherwise noted.) nH external inductor between VOUT and VPOS, Z = 50
S A O
,
Parameter OVERALL FUNCTION Frequency Range Gain
Conditions
Min 0.1
Typ
Max 2.7
Unit GHz dB dB dB dB dB dB dB/V dB/V dB/V dB dB dB dB dB dB dBm dBm dBm dB dB dB dB dB dB dBm dBm dBm dBm dB dB dB
Delta Gain
Gain Supply Sensitivity
Reverse Isolation (S12)
f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz, -40C TA +85C f = 1.9 GHz, -40C TA +85C f = 2.7 GHz, -40C TA +85C VPOS 10%, f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin RFIN f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin VOUT f = 900 MHz, 1 dB compression f = 1.9 GHz f = 2.7 GHz f = 900 MHz, -40C TA +85C f = 1.9 GHz, -40C TA +85C f = 2.7 GHz, -40C TA +85C f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz, f = 1.9 GHz, f = 2.7 GHz, f = 900 MHz, f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin VPOS 2.7 16 -40C TA +85C f = 1 MHz, PIN = -28 dBm f = 1 MHz, PIN = -28 dBm f = 1 MHz, PIN = -28 dBm f = 1 MHz, PIN = -28 dBm
19.5 18.6 17.1 -0.97 -1.05 -1.33 0.54 0.37 0.2 -33.5 -38 -32.9 24.4 23 12.7 4.6 3.7 2.7 0.7 0.7 0.8 23.6 16.5 14.6 19 16 14.2 29.7 4.2 4.8 5.4 3 23 6.2 33 3.3 31
RF INPUT INTERFACE Input Return Loss
RF OUTPUT INTERFACE Output Compression Point
Delta Compression Point
Output Return Loss
DISTORTION/NOISE Output Third Order Intercept
Output Second Order Intercept Noise Figure
POWER INTERFACE Supply Voltage Total Supply Current Supply Voltage Sensitivity Temperature Sensitivity
Specifications subject to change without notice.
V mA mA/V A/C
-2-
REV. A
AD8354
SPECIFICATIONS
Parameter OVERALL FUNCTION Frequency Range Gain
(VS = 5 V, TA = 25 C, no external inductor between VOUT and VPOS, ZO = 50
Conditions Min 0.1 f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz, -40C TA +85C f = 1.9 GHz, -40C TA +85C f = 2.7 GHz, -40C TA +85C VPOS 10%, f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin RFIN f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin VOUT f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz, -40C TA +85C f = 1.9 GHz, -40C TA +85C f = 2.7 GHz, -40C TA +85C f = 900 MHz f = 1.9 GHz f = 2.7 GHz f = 900 MHz, f = 1.9 GHz, f = 2.7 GHz, f = 900 MHz, f = 900 MHz f = 1.9 GHz f = 2.7 GHz Pin VPOS TA = 27C -40C TA +85C 4.5 17 5 25 4 28 f = 50 MHz, PIN = -30 dBm f = 50 MHz, PIN = -30 dBm f = 50 MHz, PIN = -30 dBm f = 1 MHz, PIN = -28 dBm 19.5 18.7 17.3 -0.93 -0.99 -1.21 0.32 0.21 0.08 -33.5 -37.6 -32.9 24.4 23.9 13.5 4.8 4.6 3.6 0.37 -0.14 -0.05 23.7 22.5 17.6 19.3 17.3 15.3 28.7 4.4 5 5.6 Typ
, unless otherwise noted.)
Max 2.7 Unit GHz dB dB dB dB dB dB dB/V dB/V dB/V dB dB dB dB dB dB dBm dBm dBm dB dB dB dB dB dB dBm dBm dBm dBm dB dB dB 5.5 34 V mA mA/V A/C
Delta Gain
Gain Supply Sensitivity
Reverse Isolation (S12)
RF INPUT INTERFACE Input Return Loss
RF OUTPUT INTERFACE Output 1 dB Compression
Delta Compression Point
Output Return Loss
DISTORTION/NOISE Output Third Order Intercept
Output Second Order Intercept Noise Figure
POWER INTERFACE Supply Voltage Total Supply Current Supply Voltage Sensitivity Temperature Sensitivity
Specifications subject to change without notice.
REV. A
-3-
AD8354
ABSOLUTE MAXIMUM RATINGS* PIN CONFIGURATION
Supply Voltage VPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Input Power (re: 50 ) . . . . . . . . . . . . . . . . . . . . . . . . 10 dBm Equivalent Voltage . . . . . . . . . . . . . . . . . . . . . . 700 mV rms Internal Power Dissipation Paddle Not Soldered . . . . . . . . . . . . . . . . . . . . . . . . 325 mW Paddle Soldered . . . . . . . . . . . . . . . . . . . . . . . . . . . 812 mW JA (Paddle Not Soldered) . . . . . . . . . . . . . . . . . . . . . 200C/W JA (Paddle Soldered) . . . . . . . . . . . . . . . . . . . . . . . . . . 80C/W Maximum Junction Temperature . . . . . . . . . . . . . . . . . 150C Operating Temperature Range . . . . . . . . . . . -40C to +85C Storage Temperature Range . . . . . . . . . . . . -65C to +150C Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 240C
*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
COM1 1 NC 2 INPT
3
8
COM1 VOUT VPOS COM2
AD8354
TOP VIEW (Not to Scale)
7 6 5
COM2 4
NC = NO CONNECT
PIN FUNCTION DESCRIPTIONS
Pin No. 1, 8 2 3 4, 5 6 7
Mnemonic COM1 NC INPT COM2 VPOS VOUT
Description Device Common. Connect to low impedance ground. No Connection. RF Input Connection. Must be ac-coupled. Device Common. Connect to low impedance ground. Positive Supply Voltage. RF Output Connection. Must be ac-coupled.
ORDERING GUIDE
Model AD8354ACP-R2 AD8354ACP-REEL7 AD8354-EVAL Temperature Range -40C to +85C -40C to +85C Package Description 8-Lead LFCSP 8-Lead LFCSP Evaluation Board Package Option CP-8 CP-8 Branding JCA JCA
CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8354 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
-4-
REV. A
Typical Performance Characteristics-AD8354
90 120 60 120 90 60
150
30
150
30
180
0
180
0
210
330
210
330
240 270
300
240 270
300
TPC 1. S11 vs. Frequency, VS = 3 V, TA = 25 C, 100 MHz f 3.0 GHz
TPC 4. S22 vs. Frequency, VS = 3 V, TA = 25 C, 100 MHz f 3.0 GHz
25 GAIN AT 3.3V 20
25
20
GAIN AT -40 C
GAIN AT 2.7V
GAIN (dB)
GAIN (dB)
15
GAIN AT 3.0V
15 GAIN AT +25 C GAIN AT +85 C 10
10
5
5
0 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000
0
0
500
1000
1500
2000
2500
3000
FREQUENCY (MHz)
TPC 2. Gain vs. Frequency, VS = 2.7 V, 3.0 V, and 3.3 V, TA = 25 C
TPC 5. Gain vs. Frequency, VS = 3 V, TA = -40 C, +25 C, and +85 C
0 -5
REVERSE ISOLATION (dB)
0 -5 REVERSE ISOLATION (dB) -10 -15 -20 -25 S12 AT -40 C -30 S12 AT +25 C -35
-10 -15 -20 -25 -30 -35 S12 AT 2.7V -40 0 500 1000 1500 2000 S12 AT 3.0V 2500 3000 FREQUENCY (MHz) S12 AT 3.3V
S12 AT +85 C -40 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000
TPC 3. Reverse Isolation vs. Frequency, VS = 2.7 V, 3 V, and 3.3 V, TA = 25 C
TPC 6. Reverse Isolation vs. Frequency, VS = 3 V, TA = -40 C, +25 C, and +85 C
REV. A
-5-
AD8354
7 6 P1 dB AT 3.3V 5
4
P1 dB (dBm)
P1 dB (dBm)
6 P1 dB AT +85 C 5
4 3 2 1 0 -1 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) P1 dB AT 3.0V P1 dB AT 2.7V
P1 dB AT +25 C 3 P1 dB AT -40 C
2
1
0 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000
TPC 7. P1 dB vs. Frequency, VS = 2.7 V, 3 V, and 3.3 V, TA = 27 C
TPC 10. P1 dB vs. Frequency, VS = 3 V, TA = -40 C, +27 C, and +85 C
50 45 40 35
PERCENTAGE
50 45 40 35
PERCENTAGE
30 25 20 15 10 5 0 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 OUTPUT 1dB COMPRESSION POINT (dBm)
30 25 20 15 10 5 0 14.4 14.6 14.8 15.0 15.2 15.4 OIP3 (dBm) 15.6 15.8 16.0
TPC 8. Distribution of P1 dB, VS = 3 V, TA = 25 C, f = 2.2 GHz
TPC 11. Distribution of OIP3, VS = 3 V, TA = 25 C, f = 2.2 GHz
22 OIP3 AT 3.3V 20
22
20
18
18 OIP3 (dBm) OIP3 AT +25 C 16 OIP3 AT +85 C 14
OIP3 AT 2.7V
OIP3 (dBm)
16 OIP3 AT 3.0V 14
12
12 OIP3 AT -40 C
10
0
500
1000
1500
2000
2500
3000
10
0
500
FREQUENCY (MHz)
1000 1500 2000 FREQUENCY (MHz)
2500
3000
TPC 9. OIP3 vs. Frequency, VS = 2.7 V, 3 V, and 3.3 V, TA = 25 C
TPC 12. OIP3 vs. Frequency, VS = 3 V, TA = -40 C, +25 C, and +85 C
-6-
REV. A
AD8354
6.0 5.8
6.0 6.5
5.6
NOISE FIGURE (dB)
NOISE FIGURE (dB)
5.4 5.2 5.0 4.8 NF AT 3.3V 4.6 4.4 NF AT 3.0V
5.5 5.0 NF AT +85 C NF AT +25 C 4.0 NF AT -40 C 3.5
4.5
4.2 NF AT 2.7V 4.0
3.0
0
500
1000
1500
2000
2500
3000
0
500
FREQUENCY (MHz)
1000 1500 2000 FREQUENCY (MHz)
2500
3000
TPC 13. Noise Figure vs. Frequency, VS = 2.7 V, 3 V, and 3.3 V, TA = 25 C
TPC 16. Noise Figure vs. Frequency, VS = 3 V, TA = -40 C, +25 C, and +85 C
40 35
30 IS AT 3.3V 25
SUPPLY CURRENT (mA)
30
PERCENTAGE
20 IS AT 3.0V 15
25 20 15 10 5 0 4.70 4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 NOISE FIGURE (dB)
IS AT 2.7V
10
5
0 -60
-40
-20
0 20 40 TEMPERATURE ( C)
60
80
100
TPC 14. Distribution of Noise Figure, VS = 3 V, TA = 25 C, f = 2.2 GHz
TPC 17. Supply Current vs. Temperature, VS = 2.7 V, 3 V, and 3.3 V
90 120 60 120
90 60
150
30
150
30
180
0
180
0
210
330
210
330
240 270
300
240 270
300
TPC 15. S11 vs. Frequency, VS = 5 V, TA = 25 C, 100 MHz f 3 GHz
TPC 18. S22 vs. Frequency, VS = 5 V, TA = 25 C, 100 MHz f 3 GHz
REV. A
-7-
AD8354
25 GAIN AT 5.5V 20
25 GAIN AT -40 C 20
GAIN (dB)
GAIN (dB)
15
GAIN AT 5.0V
GAIN AT 4.5V
15 GAIN AT +25 C 10 GAIN AT +85 C
10
5
5
0 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz)
0 0 500 2000 1000 1500 FREQUENCY (MHz) 2500 3000
TPC 19. Gain vs. Frequency, VS = 4.5 V, 5.0 V, and 5.5 V, TA = 25 C
TPC 22. Gain vs. Frequency, VS = 5 V, TA = -40 C, +25 C, and +85 C
0 -5
0 -5
REVERSE ISOLATION (dB)
REVERSE ISOLATION (dB)
-10 -15 -20 -25 -30 -35 -40 0 500 1500 2000 1000 FREQUENCY (MHz) 2500 3000 S12 AT 4.5V
-10 -15 -20 -25 -30 -35 -40 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000 S12 AT -40 C S12 AT +85 C S12 AT +25 C
S12 AT 5.0V
S12 AT 5.5V
TPC 20. Reverse Isolation vs. Frequency, VS = 4.5 V, 5 V, and 5.5 V, TA = 25 C
TPC 23. Reverse Isolation vs. Frequency, VS = 5 V, TA = -40 C, +25 C, and +85 C
7 6
6 P1 dB AT +85 C
P1 dB AT 5.5V
5 P1 dB AT -40 C P1 dB AT +25 C 3
5
4
P1 dB (dBm)
4 P1 dB AT 5.0V P1 dB AT 4.5V 2 1 0 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000
3
P1 dB (dBm)
2
1
0 0 500 1000 1500 2000 FREQUENCY (MHz) 2500 3000
TPC 21. P1 dB vs. Frequency, VS = 4.5 V, 5 V, and 5.5 V, TA = 25 C
TPC 24. P1 dB vs. Frequency, VS = 5 V, TA = -40 C, +25 C, and +85 C
-8-
REV. A
AD8354
50 45 30 40 35
PERCENTAGE
35
25
PERCENTAGE
OIP3 AT 5.5V
30 25 20 15 10
20 15
10
5 5 0 3.95 4.00 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 4.45 4.50 OUTPUT 1 dB COMPRESSION POINT (dBm) 0 16.0 16.1 16.2 16.3 16.4 16.5 16.6 16.7 16.8 16.9 17.0 17.1 17.2 OIP3 (dBm)
TPC 25. Distribution of P1 dB, VS = 5 V, TA = 25 C, f = 2.2 GHz
TPC 28. Distribution of OIP3, VS = 5 V, TA = 25 C, f = 2.2 GHz
22
22 OIP3 AT -40 C 20
20
18
18
OIP3 (dBm)
OIP3 AT +85 C OIP3 AT +25 C
OIP3 (dBm)
16 OIP3 AT 5.0V OIP3 AT 4.5V 14
16
14
12
12
10 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz)
10 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz)
TPC 26. OIP3 vs. Frequency, VS = 4.5 V, 5 V, and 5.5 V, TA = 25 C
TPC 29. OIP3 vs. Frequency, VS = 5 V, TA = -40 C, +25 C, and +85 C
7.0
7.5 7.0
6.5
6.5
NOISE FIGURE (dB)
NOISE FIGURE (dB)
6.0
6.0 5.5 5.0 NF AT +85 C 4.5 4.0 NF AT +25 C NF AT -40 C
5.5 NF AT 5.5V 5.0
4.5 NF AT 4.5V NF AT 5.0V 4.0
3.0 3.5
0
500
1000
1500
2000
2500
3000
0
500
1000
1500
2000
2500
3000
FREQUENCY (MHz)
FREQUENCY (MHz)
TPC 27. Noise Figure vs. Frequency, VS = 4.5 V, 5 V, and 5.5 V, TA = 25 C
TPC 30. Noise Figure vs. Frequency, VS = 5 V, TA = -40 C, +25 C, and +85 C
REV. A
-9-
AD8354
40 35
10 19 15 20
30
PERCENTAGE
POUT (dBm)
20 15 10
0
17
-5
16
-10
15
5 0 4.5
-15 14 -30 -25 -20 -15 PIN (dBm) -10 -5 0
4.6
4.7
4.8
4.9 5.0 5.1 5.2 NOISE FIGURE (dB)
5.3
5.4
5.5
5.6
TPC 31. Distribution of Noise Figure, VS = 5 V, TA = 25 C, f = 2.2 GHz
TPC 33. Output Power and Gain vs. Input Power, VS = 3 V, TA = 25 C, f = 900 MHz
35
15
20
30
SUPPLY CURRENT (mA)
IS AT 5.5V
10
19
25 5
POUT (dBm)
18
GAIN (dB)
20 IS AT 5.0V 15 10
IS AT 4.5V
0
17
-5
16
5
-10
15
0 -60
-40
-20
0
20
40
60
80
100
-15 -30
-25
-20
-15 PIN (dBm)
-10
-5
0
14
TEMPERATURE ( C)
TPC 32. Supply Current vs. Temperature, VS = 4.5 V, 5 V, and 5.5 V
TPC 34. Output Power and Gain vs. Input Power, VS = 5 V, TA = 25 C, f = 900 MHz
-10-
REV. A
GAIN (dB)
25
5
18
AD8354
THEORY OF OPERATION APPLICATIONS
The AD8354 is a two-stage feedback amplifier employing both shunt-series and shunt-shunt feedback. The first stage is degenerated and resistively loaded, and provides approximately 10 dB of gain. The second stage is a PNP-NPN Darlington output stage, which provides another 10 dB of gain. Series-shunt feedback from the emitter of the output transistor sets the input impedance to 50 over a broad frequency range. Shunt-shunt feedback from the amplifier output to the input of the Darlington stage helps to set the output impedance to 50 . The amplifier can be operated from a 3 V supply by adding a choke inductor from the amplifier output to VPOS. Without this choke inductor, operation from a 5 V supply is also possible.
BASIC CONNECTIONS
The AD8354 RF gain block may be used as a general-purpose fixed-gain amplifier in a wide variety of applications, such as a driver for a transmitter power amplifier (Figure 1). Its excellent reverse isolation also makes this amplifier suitable for use as a local oscillator buffer amplifier that would drive the local oscillator port of an up or down converter mixer (Figure 2).
AD8354
HIGH POWER AMPLIFIER
Figure 1. AD8354 as a Driver Amplifier
MIXER
The AD8354 RF gain block is a fixed-gain amplifier with singleended input and output ports whose impedances are nominally equal to 50 over the frequency range 100 MHz to 2.7 GHz. Consequently, it can be directly inserted into a 50 system with no impedance matching circuitry required. The input and output impedances are sufficiently stable versus variations in temperature and supply voltage that no impedance matching compensation is required. A complete set of scattering parameters is available at the Analog Devices website (www.analog.com). The input pin (INPT) is connected directly to the base of the first amplifier stage, which is internally biased to approximately 1 V, so a dc-blocking capacitor should be connected between the source that drives the AD8354 and the input pin, INPT. It is critical to supply very low inductance ground connections to the ground pins (Pins 1, 4, 5, and 8) as well as to the backside exposed paddle. This will ensure stable operation. The AD8354 is designed to operate over a wide supply voltage range from 2.7 V to 5.5 V. The output of the part, VOUT, is taken directly from the collector of the output amplifier stage. This node is internally biased to approximately 3.2 V when the supply voltage is 5 V. Consequently, a dc-blocking capacitor should be connected between the output pin, VOUT, and the load that it drives. The value of this capacitor is not critical, but it should be 100 pF or larger. When the supply voltage is 3 V, it is recommended that an external RF choke be connected between the supply voltage and the output pin, VOUT. This will increase the dc voltage applied to the collector of the output amplifier stage, which will improve performance of the AD8354 to be very similar to the performance produced when 5 V is used for the supply voltage. The inductance of the RF choke should be approximately 100 nH. Care should be taken to ensure that the lowest series self-resonant frequency of this choke is well above the maximum frequency of operation for the AD8354. The supply voltage input, VPOS, should be bypassed using a large value capacitance (approximately 0.47 F or larger) and a smaller, high frequency bypass capacitor (approximately 100 pF) physically located close to the VPOS pin. The recommended connections and components are shown in the schematic of the AD8354 evaluation board (Figure 3).
AD8354
LOCAL OSCILLATOR
Figure 2. AD8354 as a LO Driver Amplifier
AD8354
1 COM1 COM1 8 C2 1000pF L1 3 INPT VPOS 6 C3 100pF 4 COM2 COM2 5 C4 0.47 F VP OUTPUT
2 NC INPUT C1 1000pF
VOUT 7
NC = NO CONNECT
Figure 3. Evaluation Board Schematic
EVALUATION BOARD
Figure 3 shows the schematic of the AD8354 evaluation board. Note that L1 is shown as an optional component, which is used to obtain maximum gain only when VP = 3 V. The board is powered by a single supply in the 2.7 V to 5.5 V range. The power supply is decoupled by 0.47 F and 100 pF capacitors.
Table I. Evaluation Board Configuration Options
Component Function C1, C2 C3 C4 L1 AC Coupling Capacitors. High Frequency Bypass Capacitor. Low Frequency Bypass Capacitor. Optional RF Choke. Used to increase current through output stage when VP = 3 V. Not recommended for use when VP = 5 V.
Default Value 1000 pF, 0603 100 pF, 0603 0.47 F, 0603
100 nH, 0603
REV. A
-11-
AD8354
Figure 4. Silkscreen Top
Figure 5. Component Side
-12-
REV. A
AD8354
OUTLINE DIMENSIONS 8-Lead Lead Frame Chip Scale Package [LFCSP] 2mm x 3 mm Body (CP-8)
Dimensions shown in millimeters
3.25 3.00 2.75 1.95 1.75 1.55 2.25 2.00 1.75 0.60 0.45 0.30
5
1.89 1.74 1.59
8
0.55 0.40 0.30
BOTTOM VIEW
4
1
0.15 0.10 0.05 0.25 0.20 0.15
PIN 1 INDICATOR
2.95 2.75 2.55 12 0
0.50 BSC
1.00 0.90 0.80
0.80 MAX 0.65 NOM 0.05 0.02 0.00 0.20 REF
SEATING PLANE
0.30 0.23 0.18
NOTES 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS. 2. PADDLE IS COPPER PLATED WITH LEAD FINISH.
REV. A
-13-
AD8354 Revision History
Location 6/02--Data Sheet changed from REV. 0 to REV. A. Page
Change to ORDERING GIUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Replaced TPC 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
-14-
REV. A
-15-
-16-
C02722-0-6/03(A)
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