19-2998; Rev 1; 12/03 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller Features ♦ Complete RF Detector/Controller This logarithmic amplifier provides much wider measurement range and superior accuracy compared to controllers based on diode detectors, while achieving excellent temperature stability over the full -40°C to +85°C operating range. ♦ Available in 8-Pin µMAX Package ♦ 0.1GHz to 2.5GHz Frequency Range ♦ Exceptional Accuracy Over Temperature ♦ High Dynamic Range ♦ 2.7V to 5.25V Supply Voltage Range* ♦ Scaling Stable Over Supply and Temperature Variations ♦ Controller Mode with Error Output ♦ Shutdown Mode with Typically 1µA of Supply Current *See Power-Supply Connections section. Applications Ordering Information AGC Measurement and Control PART RF Transmitter Power Measurement MAX2015EUA-T TEMP RANGE PIN-PACKAGE -40°C to +85°C 8 µMAX RSSI Measurements Cellular Base Station, WLAN, Microwave Link, Radar, and other Military Applications Functional Diagram VCC 1, 4 POWER DETECTORS INHI Σ 2 50Ω INLO PWDN Σ 7dB Σ 7dB 8 7 7dB 3 OUT SET 20kΩ 5 OFFSET AND COMMONMODE AMP 20kΩ MAX2015 6 GND Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX2015 General Description The MAX2015 complete multistage logarithmic amplifier is designed to accurately convert radio-frequency (RF) signal power in the 0.1GHz to 2.5GHz frequency range to an equivalent DC voltage. The outstanding dynamic range and precision over temperature of this log amplifier make it particularly useful for a variety of base station and other wireless applications, including automatic gain control (AGC), transmitter power measurements, and received signal strength indication (RSSI) for terminal devices. The MAX2015 can also be operated in a controller mode where it measures, compares, and controls the output power of a variable-gain amplifier as part of a fully integrated AGC loop. MAX2015 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller ABSOLUTE MAXIMUM RATINGS VCC (Pins, 1, 4) to GND.......................................-0.3V to +5.25V SET, PWDN to GND....................................-0.3V to (VCC + 0.3V) Input Power Differential INHI, INLO................................+23dBm Input Power Single Ended (INHI or INLO grounded).....+19dBm Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (MAX2015 Typical Application Circuit (Figure 1), VS = +3.3V, fRF = 100MHz to 2500MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage Supply Current VS ICC R4 = 75Ω ±1%, PWDN must be connected to GND 4.75 5.25 R4 = 0Ω 2.7 3.6 V TA = +25°C, VS = 5.25V, R4 = 75Ω 17.3 TA = +25°C 17.3 0.05 mA/°C 1 µA 0.5 to 1.8 V 40 kΩ 4 mA Supply Current Variation with Temp ICC TA = -40°C to +85°C Shutdown Current ICC VPWDN = VCC mA 20.5 CONTROLLER REFERENCE (SET) SET Input Voltage Range SET Input Impedance DETECTOR OUTPUT (OUT) Source Current Sink Current 450 µA Minimum Output Voltage VOUT(MIN) 0.5 V Maximum Output Voltage VOUT(MAX) 1.8 V 2 _______________________________________________________________________________________ 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller (MAX2015 Typical Application Circuit (Figure 1), VS = +3.3V, fRF = 100MHz to 2500MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL RF Input Frequency Range fRF Return Loss S11 Large-Signal Response Time CONDITIONS PIN = no signal to 0dBm, ±0.5dB settling accuracy MIN TYP MAX UNITS 0.1 to 2.5 GHz -15 dB 150 ns -65 to +5 dBm 70 dB RSSI MODE—0.1GHz RF Input Power Range (Note 2) ±3dB Dynamic Range TA = -40°C to +85°C (Note 3) Range Center -30 dBm Temp Sensitivity when TA > +25°C TA = +25°C to +85°C, PIN = -25dBm +0.0083 dB/°C Temp Sensitivity when TA < +25°C TA = -40°C to +25°C, PIN = -25dBm -0.0154 dB/°C Slope (Note 4) 19 mV/dB Typical Slope Variation TA = -40°C to +85°C -4 µV/°C Intercept (Note 5) -100 dBm Typical Intercept Variation TA = -40°C to +85°C 0.03 dBm/°C -65 to +5 dBm 70 dB RSSI MODE—0.9GHz RF Input Power Range (Note 2) ±3dB Dynamic Range TA = -40°C to +85°C (Note 3) Range Center -30 dBm Temp Sensitivity when TA > +25°C TA = +25°C to +85°C, PIN = -25dBm ±0.0083 dB/°C Temp Sensitivity when TA < +25°C TA = -40°C to +25°C, PIN = -25dBm -0.0154 dB/°C 18.1 mV/dB -4 µV/°C Slope (Note 4) Typical Slope Variation TA = -40°C to +85°C Intercept (Note 5) -97 dBm Typical Intercept Variation TA = -40°C to +85°C 0.02 dBm/°C -55 to +5 dBm RSSI MODE—1.9GHz RF Input Power Range (Note 2) ±3dB Dynamic Range TA = -40°C to +85°C (Note 3) Range Center 60 dB -25 dBm Temp Sensitivity when TA > +25°C TA = +25°C to +85°C, PIN = -25dBm ±0.0033 dB/°C Temp Sensitivity when TA < +25°C TA = -40°C to +25°C, PIN = -25dBm -0.0138 dB/°C 18 mV/dB -4.8 µV/°C Slope (Note 4) Typical Slope Variation TA = -40°C to +85°C _______________________________________________________________________________________ 3 MAX2015 AC ELECTRICAL CHARACTERISTICS MAX2015 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller AC ELECTRICAL CHARACTERISTICS (continued) (MAX2015 Typical Application Circuit (Figure 1), VS = +3.3V, fRF = 100MHz to 2500MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Intercept (Note 5) -83 dBm Typical Intercept Variation TA = -40°C to +85°C 0.03 dBm/°C -45 to -5 dBm RSSI MODE—2.5GHz RF Input Power Range (Note 2) ±3dB Dynamic Range TA = -40°C to +85°C (Note 3) Range Center 40 dB -25 dBm Temp Sensitivity when TA > +25°C TA = +25°C to +85°C, PIN = -25dBm -0.0083 dB/°C Temp Sensitivity when TA < +25°C TA = -40°C to +25°C, PIN = -25dBm -0.0083 dB/°C Slope (Note 4) 16.8 mV/dB Typical Slope Variation TA = -40°C to +85°C -8 µV/°C Intercept (Note 5) -81 dBm Typical Intercept Variation TA = -40°C to +85°C 0.03 dBm/°C Note 1: The MAX2015 is 100% production tested at TA = +25°C and is guaranteed by design for TA = -40°C to +85°C, as specified. Note 2: Typical minimum and maximum range of the detector at the stated frequency. Note 3: Dynamic range refers to the range over which the error remains within the stated bounds. The error is calculated at -40°C and +85°C, relative to the curve at +25°C. Note 4: The slope is the variation of the output voltage per change in input power. It is calculated by fitting a root-mean-square (RMS) straight line to the data indicated by RF input power range. Note 5: The intercept is an extrapolated value that corresponds to the output power for which the output voltage is zero. It is calculated by fitting an RMS straight line to the data. 4 _______________________________________________________________________________________ 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller fIN = 0.1GHz 1.8 2 3 MAX2015 toc02 3 MAX2015 toc01 2.0 fIN = 0.1GHz NORMALIZED TO DATA AT +25°C fIN = 0.1GHz, TA = +85°C NORMALIZED TO DATA AT +25°C 2 1.6 TA = +85°C 1.2 TA = +85°C 1.0 0 VCC = 3.6V 1 ERROR (dB) 1 1.4 ERROR (dB) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE ERROR vs. INPUT POWER OUTPUT VOLTAGE ERROR vs. INPUT POWER MAX2015 toc03 OUTPUT VOLTAGE vs. INPUT POWER TA = +25°C 0 VCC = 2.7V VCC = 3.0V VCC = 3.3V -1 -1 0.8 TA = -40°C TA = +25°C 0.6 -2 -2 TA = -40°C 0.4 -50 -40 -30 -20 -10 0 10 -70 0 1.8 -40 -30 -20 -10 -50 -40 -30 -20 -10 0 ERROR (dB) 1.2 TA = +85°C 1.0 0 -1 TA = +25°C TA = -40°C -3 -70 10 TA = -40°C -2 -60 -50 -40 -30 -20 -10 0 10 -70 -60 -50 -40 -30 -20 -10 INPUT POWER (dBm) INPUT POWER (dBm) OUTPUT VOLTAGE ERROR vs. INPUT POWER OUTPUT VOLTAGE ERROR vs. INPUT POWER OUTPUT VOLTAGE vs. INPUT POWER VCC = 3.6V VCC = 2.7V 1 ERROR (dB) 1 VCC = 3.0V -1 VCC = 2.7V 0 VCC = 3.0V -1 VCC = 3.3V -2 VCC = 3.3V -2 -3 -40 -30 -20 INPUT POWER (dBm) -10 0 10 fIN = 1.9GHz 1.8 1.6 1.4 1.2 1.0 TA = +85°C 0.8 VCC = 3.6V TA = +25°C TA = -40°C 0.6 0.4 -3 -50 2.0 OUTPUT VOLTAGE (V) 2 fIN = 0.9GHz, TA = -40°C NORMALIZED TO DATA AT +25°C -70 -60 -50 -40 -30 MAX2015 toc09 3 MAX2015 toc07 fIN = 0.9GHz, TA = +85°C NORMALIZED TO DATA AT +25°C 10 TA = +25°C INPUT POWER (dBm) 3 0 TA = +85°C 1 1.4 0.4 -3 10 fIN = 0.9GHz NORMALIZED TO DATA AT +25°C 2 0.8 VCC = 3.6V 0 1.6 0.6 -60 -50 MAX2015 toc06 fIN = 0.9GHz -2 -70 -60 3 MAX2015 toc05 MAX2015 toc04 2.0 OUTPUT VOLTAGE (V) ERROR (dB) -10 OUTPUT VOLTAGE ERROR vs. INPUT POWER VCC = 3.3V 0 -20 OUTPUT VOLTAGE vs. INPUT POWER VCC = 3.0V -60 -30 OUTPUT VOLTAGE ERROR vs. INPUT POWER VCC = 2.7V -70 -40 INPUT POWER (dBm) -1 ERROR (dB) -50 INPUT POWER (dBm) 1 2 -60 INPUT POWER (dBm) fIN = 0.1GHz, TA = -40°C NORMALIZED TO DATA AT +25°C 0 -70 MAX2015 toc08 -60 3 2 -3 -3 -70 -20 INPUT POWER (dBm) -10 0 10 -60 -50 -40 -30 -20 -10 0 10 INPUT POWER (dBm) _______________________________________________________________________________________ 5 MAX2015 Typical Operating Characteristics (MAX2015 Typical Application Circuit (Figure 1), VS = VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, VPWDN = 0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (MAX2015 Typical Application Circuit (Figure 1), VS = VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, VPWDN = 0V, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE ERROR vs. INPUT POWER 1 ERROR (dB) TA = +25°C -1 VCC = 3.3V VCC = 2.7V TA = -40°C 1 -1 VCC = 3.0V -2 -3 -40 -30 -20 -10 0 10 -3 -60 -50 -30 -20 -10 10 0 -60 -50 -40 0 OUTPUT VOLTAGE vs. INPUT POWER OUTPUT VOLTAGE ERROR vs. INPUT POWER OUTPUT VOLTAGE ERROR vs. INPUT POWER MAX2015 toc13 3 fIN = 2.5GHz NORMALIZED TO DATA AT +25°C 2 ERROR (dB) 1 1.0 TA = +85°C 3 2 fIN = 2.5GHz, TA = +85°C NORMALIZED TO DATA AT +25°C TA = +25°C 0 VCC = 3.3V 0 VCC = 3.6V VCC = 2.7V -1 TA = -40°C 0.6 -2 TA = +25°C TA = -40°C -30 -20 -10 0 -3 -50 INPUT POWER (dBm) -40 -30 -20 0 -10 -40 VCC = 2.7V VCC = 3.0V 0 VCC = 3.3V VCC = 3.6V -2 -3 2.5 RF INPUT VOLTAGE, OUTPUT VOLTAGE (V) MAX2015 toc16 fIN = 2.5GHz, TA = -40°C NORMALIZED TO DATA AT +25°C 1 -30 fIN = 100MHz 2.0 VOUT 1.5 1.0 RFIN (AC-COUPLED) 0.5 0 -0.5 -1.0 -50 -40 -30 -20 INPUT POWER (dBm) -10 -20 -10 INPUT POWER (dBm) RF PULSE RESPONSE 3 -1 -50 INPUT POWER (dBm) OUTPUT VOLTAGE ERROR vs. INPUT POWER 2 VCC = 3.0V -2 -3 -40 10 1 TA = +85°C -1 ERROR (dB) -10 INPUT POWER (dBm) 1.2 6 -20 INPUT POWER (dBm) fIN = 2.5GHz 0.4 -50 -30 INPUT POWER (dBm) 1.4 0.8 -40 ERROR (dB) -50 MAX2015 toc14 -60 VCC = 3.6V VCC = 3.3V -2 -3 VCC = 3.0V 0 MAX2015 toc15 -2 fIN = 1.9GHz, TA = -40°C NORMALIZED TO DATA AT +25°C VCC = 2.7V VCC = 3.6V 0 -1 2 0 TIME (50ns/div) _______________________________________________________________________________________ MAX2015 toc17 0 fIN = 1.9GHz, TA = +85°C NORMALIZED TO DATA AT +25°C ERROR (dB) TA = +85°C 1 ERROR (dB) 2 3 MAX2015 toc11 fIN = 1.9GHz NORMALIZED TO DATA AT +25°C 2 3 MAX2015 toc10 3 OUTPUT VOLTAGE ERROR vs. INPUT POWER MAX2015 toc12 OUTPUT VOLTAGE ERROR vs. INPUT POWER OUTPUT VOLTAGE (V) MAX2015 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller 0 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller S11 MAGNITUDE S11 MAGNITUDE -17.5 -20.0 TA = -40°C -12.5 MAGNITUDE (dB) VCC = 2.7V, 3.0V -15.0 MAX2015 toc19 -12.5 MAGNITUDE (dB) -10.0 MAX2015 toc18 -10.0 -15.0 -17.5 TA = +85°C -20.0 TA = +25°C VCC = 3.3V, 3.6V -22.5 -22.5 -25.0 -25.0 0 0.5 1.0 1.5 2.0 2.5 3.0 0 FREQUENCY (GHz) 0.5 1.0 1.5 2.0 2.5 3.0 FREQUENCY (GHz) Pin Description PIN NAME 1, 4 VCC 2, 3 DESCRIPTION Supply Voltage. Bypass with capacitors as specified in the application drawing. Place capacitors as close to the pin as possible (see Power-Supply Connections section). INHI, INLO Differential RF Inputs Power-Down Input. Drive PWDN with a logic high to power down the IC. PWDN must be connected to GND for VS between 4.75V and 5.25V with R4 = 75Ω 5 PWDN 6 GND Ground. Connect to the printed circuit (PC) board ground plane. 7 SET Set-Point Input. To operate in detector mode, connect SET to OUT. To operate in controller mode, connect a precision voltage source to control the power level of a power amplifier. 8 OUT Detector Output. In detector mode, this output provides a voltage proportional to the log of the input power. In controller mode, this output is connected to a power-control input on a power amplifier (PA). _______________________________________________________________________________________ 7 MAX2015 Typical Operating Characteristics (continued) (MAX2015 Typical Application Circuit (Figure 1), VS = VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL = 10kΩ, VPWDN = 0V, TA = +25°C, unless otherwise noted.) MAX2015 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller Detailed Description The MAX2015 is a successive detection logarithmic amplifier designed for use in RF power measurement and AGC applications with a 0.1GHz to 2.5GHz frequency range from a single 2.7V to 3.6V power supply. It is pin compatible with other leading logarithmic amplifiers. The MAX2015 provides for improved performance with a high 75dB dynamic range at 100MHz, and exceptional accuracy over the extended temperature range and supply voltage range. RF Input The MAX2015 differential RF input (INHI, INLO) allows for broadband signals between 100MHz and 2.5GHz. For single-ended signals, AC-couple INLO to ground. The RF inputs are internally biased and need to be ACcoupled using 680pF capacitors as shown in Figure 1 and Figure 2. An internal 50Ω resistor between INHI and INLO provides a good 50MHz to 3.0GHz match. SET Input Applications Information Detector (RSSI) Mode In detector mode, the MAX2015 acts like an RSSI, which provides an output voltage proportional to the input power. This is accomplished by providing a feedback path from OUT to SET (R1 = 0Ω; see Figure 1). By connecting SET directly to OUT, the op amp gain is set to 2V/V due to two internal 20kΩ feedback resistors. This provides a detector slope of approximately 18mV/dB with a 0.5V to 1.8V output range. VS R4 1 C6 VCC C5 DETECTORS C1 RFIN The SET input is used for loop control when in controller mode or to set the slope of the output signal (mV/dB) when in detector mode. The internal input structure of SET is two series 20kΩ resistors connected to ground. The center node of the resistors is fed to the negative input of the internal output op amp. 2 INHI OUT 8 20kΩ OUT SET 7 R1 C2 3 4 C4 20kΩ INLO VCC GND MAX2015 PWDN 6 5 C3 Power-Supply Connections The MAX2015 requires power-supply bypass capacitors connected close to each VCC pin. At each VCC pin, connect a 0.1µF capacitor (C4, C6) and a 100pF capacitor (C3, C5) with the 100pF capacitor being closest to the pin. For power-supply voltages (VS) between 2.7V and 3.6V, set R4 = 0Ω (see Typical Apllications Circuits). For power-supply voltages (VS) between 4.75V and 5.25V, set R4 = 75Ω ±1% (100ppm/°C max) and PWDN must be connected to GND. Power-Down Mode The MAX2015 can be powered down by driving PWDN with logic high (logic high = V CC ). In power-down mode, the supply current is reduced to a typical value of 1µA. For normal operation, drive PWDN with a logic low. It is recommended when using power-down that an RF signal not be applied before the power-down signal is low. 8 Figure 1. Detector-Mode (RSSI) Typical Application Circuit Table 1. Suggested Components of Typical Applications Circuits DESIGNATION VALUE C1, C2 680pF 0603 ceramic capacitors TYPE C3, C5 100pF 0603 ceramic capacitors C4, C6 0.1µF R1* 0Ω 0603 resistor R4** 0Ω 0603 resistor 0603 ceramic capacitors *RSSI mode only. **VS = 2.7V to 3.6V. _______________________________________________________________________________________ 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller MAX2015 Controller Mode The MAX2015 can also be used as a detector/controller within an AGC loop. Figure 3 depicts one scenario where the MAX2015 is employed as the controller for a variable-gain PA. As shown in the figure, the MAX2015 monitors the output of the PA through a directional coupler. An internal integrator (Figure 2) compares the detected signal with a reference voltage determined by VSET. The integrator, acting like a comparator, increases or decreases the voltage at OUT, according to how closely the detected signal level matches the VSET reference. The MAX2015 adjusts the power of the PA to a level determined by the voltage applied to SET. With R1 = 0Ω, the controller mode slope is approximately 19mV/dB (RF = 100MHz). POWER AMPLIFIER TRANSMITTER COUPLER GAIN-CONTROL INPUT LOGARITHMIC DETECTOR OUT IN SET SET-POINT DAC 20kΩ Layout Considerations As with any RF circuit, the layout of the MAX2015 circuit affects the device’s performance. Use an abundant number of ground vias to minimize RF coupling. Place the input capacitors (C1, C2) and the bypass capacitors (C3–C6) as close to the IC as possible. Connect the bypass capacitors to the ground plane with multiple vias. 20kΩ MAX2015 Figure 3. System Diagram for Automatic Gain-Control Loop Pin Configuration VS TOP VIEW R4 1 C6 VCC C5 DETECTORS C1 RFIN C2 2 3 INHI INLO OUT 8 20kΩ SET 7 VOUT VSET VCC 1 8 INHI 2 7 SET INLO 3 6 GND VCC 4 5 PWDN MAX2015 OUT µMAX 20kΩ GND 6 Chip Information 4 C4 VCC MAX2015 PWDN 5 C3 TRANSISTOR COUNT: 3157 PROCESS: BiCMOS Figure 2. Controller-Mode Typical Application Circuit _______________________________________________________________________________________ 9 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 4X S 8 8 INCHES DIM A A1 A2 b E ÿ 0.50±0.1 H c D e E H 0.6±0.1 L 1 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6∞ 0∞ 0.0207 BSC 8LUMAXD.EPS MAX2015 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 5.03 4.78 0.41 0.66 0∞ 6∞ 0.5250 BSC TOP VIEW A1 A2 A α c e b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.