Differential, Low Noise IF Gain a Block with Output Clamping AD6630 FEATURES FUNCTIONAL BLOCK DIAGRAM 24 dB Gain 4 dB Noise Figure AD6630 1 16 NC V CC Easy Match to SAW Filters 2 15 NC CD1 Output Limiter Adjustable +8.5 dBm to +12 dBm IP2 3 + 14 OP 700 MHz Bandwidth + IP1 4 + 13 V EE 10 V Single or Dual 5 V Power Supply IP1 5 12 CMD 300 mW Power Dissipation 6 11 IP2 OP APPLICATIONS CLLO 7 10 CD2 ADC IF Drive Amp CLHI 8 9 V CC Communications Receivers PCS/Cellular Base Stations NC = NO CONNECT GSM, CDMA, TDMA PRODUCT DESCRIPTION GSM to CDMA to AMPS. The clamping circuitry also main- The AD6630 is an IF gain block designed to interface between tains the phase integrity of an overdriven signal. This allows SAW filters and differential input analog-to-digital converters. phase demodulation of single carrier signals with an overrange The AD6630 has a fixed gain of 24 dB and has been optimized signal. for use with the AD6600 and AD6620 in digitizing narrowband While the AD6630 is optimized for use with the AD6600 Dual IF carriers in the 70 MHz to 250 MHz range. Channel, Gain Ranging ADC with RSSI, it can also be used in Taking advantage of the differential nature of SAW filters, the many other IF applications. The AD6630 is designed with an AD6630 has been designed as a differential in/differential out input impedance of 200 W and an output of 400 W . In the typi- gain block. This architecture allows 100 dB of adjacent channel cal application shown below, these values match the real portion blocking using low cost SAW filters. The AD6630 provides of a typical SAW filter. Other devices can be matched using output limiting for ADC and SAW protection with ,10 phase standard matching network techniques. variation in recovery from overdrive situations. The AD6630 is built using Analog Devices high speed comple- Designed for narrow-band cellular/PCS receivers, the high mentary bipolar process. Units are available in a 300 mil SOIC linearity and low noise performance of the AD6630 allows for (16 leads) plastic surface mount package and specified to operate implementation in a wide range of applications ranging from over the industrial temperature range (40 C to +85 C). AD6630 MAIN LOCAL AD6600 AD6620AD6620 DSP OSCILLATOR AD6630 DIVERSITY Figure 1. Reference Design REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or Tel: 781/329-4700 World Wide Web Site: AD6630SPECIFICATIONS NORMAL OPERATING CONDITIONS Parameter (Conditions) Min Typ Max Units SINGLE SUPPLY VOLTAGE 8.5 10.5 V POSITIVE SUPPLY VOLTAGE 4.25 5.0 5.25 V NEGATIVE SUPPLY VOLTAGE 5.25 5.0 4.25 V AMBIENT TEMPERATURE 40 +85 C PACKAGE THERMAL RESISTANCE 80 C/W 1 OPERATING FREQUENCY 70 250 MHz (T = 408C, T = +858C. Output dc levels are nominally at V , where V = V + V = +5 V + (5 V) = 0. MIN MAX M M CC EE DC SPECIFICATIONS Inputs should be AC coupled.) Test Parameter Temp Level Min Typ Max Units SUPPLY CURRENT Full II 30 48 mA OUTPUT DC LEVEL Full II V 150 V +150 mV M M (T = 408C, T = +858C. All AC production tests are performed at 5 MHz. 70 MHz and 250 MHz MIN MAX performance limits are correlated to 5 MHz testing based on characterization data.) AC SPECIFICATIONS Test 1 Parameter Temp Level Min Typ Max Units GAIN (POWER) 70 MHz Full II 23 24 25 dB GAIN (POWER) 250 MHz Full II 22 23 24 dB 3 dB BANDWIDTH +25 C V 700 MHz 2 OUTPUT REFERRED IP3 70 MHz Full V 22 dBm 2 OUTPUT REFERRED IP3 250 MHz Full V 19 dBm 2 OUTPUT REFERRED IP2 70 MHz Full V 45 dBm 2 OUTPUT REFERRED IP2 250 MHz Full V 45 dBm OUTPUT REFERRED 1 dB COMPRESSION POINT 3 70 MHz LOW LEVEL CLAMP Full II 8.5 dBm OUTPUT REFERRED 1 dB COMPRESSION POINT 3 250 MHz LOW LEVEL CLAMP Full II 7.5 dBm OUTPUT REFERRED 1 dB COMPRESSION POINT 4 70 MHz HIGH LEVEL CLAMP Full II 11 dBm OUTPUT REFERRED 1 dB COMPRESSION POINT 4 250 MHz HIGH LEVEL CLAMP Full II 9 dBm OUTPUT SLEW RATE +25 C V 3700 V/m s INPUT IMPEDANCE (REAL) +25 C V 200 W INPUT CAPACITANCE +25 CV 2 pF OUTPUT IMPEDANCE (REAL) +25 C V 400 W OUTPUT CAPACITANCE +25 CV 2 pF NOISE FIGURE +25 CV 4 dB 3, 5 LOW LEVEL CLAMP MAXIMUM OUTPUT 70 MHz Full IV 11 12.5 dBm 4, 5 HIGH LEVEL CLAMP MAXIMUM OUTPUT 70 MHz Full IV 13.8 14.3 dBm 3, 5 LOW LEVEL CLAMP MAXIMUM OUTPUT 250 MHz Full IV 9.25 10.6 dBm 2 REV. 0 OBSOLETE