AD605ARZ Analog Devices Inc, AD605ARZ Datasheet

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FEATURES 2 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 − +34 dB (FBK shorted to OUT) through ...

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AD605 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ...

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SPECIFICATIONS Each channel @ T = 25° unless otherwise noted. Table 1. Parameter Conditions INPUT CHARACTERISTICS Input Resistance Input Capacitance Peak Input Voltage At minimum gain Input Voltage Noise VGN = 2.9 ...

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AD605 Parameter Conditions GAIN CONTROL INTERFACE Gain Scaling Factor V REF V REF Gain Range FBK short to OUT FBK open Input Voltage (VGN) Range 20 dB/V, VREF = 2.5 V Input Bias Current Input Resistance Response Time 48 dB ...

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ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage +V S Pin 12, Pin 13 (with Pin 4, Pin Input Voltage Pin 1 to Pin 3, Pin 6 to Pin 9, Pin 16 Internal Power Dissipation 16-Lead ...

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AD605 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 VGN1 CH1 Gain Control Input and Power-Down Pin. If grounded, device is off; otherwise, positive voltage increases gain. 2 −IN1 CH1 Negative Input. 3 ...

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TYPICAL PERFORMANCE CHARACTERISTICS (PER CHANNEL 2.5 V (20 dB/V scaling MHz, R REF 40 30 –40°C, +25°C, +85° –10 –20 0.1 0.5 0.9 1.3 1.7 VGN (V) Figure 3. Gain vs. VGN ...

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AD605 2.0 1.5 1.0 0.5 0 30dB/V –0 1.67V REF –1.0 –1.5 –2.0 0.2 0.7 1.2 1.7 VGN (V) Figure 9. Gain Error vs. VGN for Two Gain Scale Values ΔG(dB) = G(CH1) ...

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VGN (V) Figure 15. Input Referred Noise vs. VGN 2.00 VGN = 2.9V 1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 –40 –30 –20 – ...

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AD605 – p-p –35 OUT VGN = 1.0V –40 –45 –50 –55 HD2 –60 –65 –70 100k 1M FREQUENCY (Hz) Figure 21. Harmonic Distortion vs. Frequency –35 –40 –45 HD2 –50 (1MHz) HD2 (10MHz) –55 –60 –65 ...

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TRIG'D –200 253ns 100ns/DIV Figure 27. Small Signal Pulse Response 500mV 2.9V 100 0.0V 500mV Figure 28. Power-Up/Power-Down Response 500mV 2.9V 100 0.1V 500mV Figure 29. Gain Response – 200mV p-p ...

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AD605 25 +I (AD605 (VGN = –40 –30 –20 – TEMPERATURE (°C) Figure 33. Supply Current (One Channel) vs. Temperature Rev. ...

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THEORY OF OPERATION The AD605 is a dual-channel, low noise VGA. Figure 35 shows the simplified block diagram of one channel. Each channel consists of a single-supply X-AMP® (hereafter called DSX, differential single-supply X-AMP) comprising the following: • Precision passive ...

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AD605 R –6.908dB R +IN 1.5R MID 1. –IN NOTE 96Ω 1.5R = 144Ω DIFFERENTIAL LADDER (ATTENUATOR) The attenuator before the fixed gain amplifier is realized by a differential, 7-stage, R-1.5R resistive ladder network with an ...

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GAIN CONTROL VOLTAGE –10 –15 –20 Figure 37. Ideal Gain Curves vs. V Usable gain control voltage ranges are 0 2.9 V for the ...

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AD605 APPLICATIONS INFORMATION The basic circuit in Figure 38 shows the connections for one channel of the AD605 with a gain range of − +34.4 dB. The signal is applied at +IN1. The ac coupling capacitors before Pin ...

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Figure 40 shows the gain vs. VGN for the circuit in Figure MHz and the lowest gain range (− +34.4 dB). Note that the gain scaling is 40 dB/V, double the 20 dB ...

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AD605 EVALUATION BOARD The AD605-EVALZ provides a platform for the circuit designer to become familiar with the many operating and performance features of the AD605 variable gain amplifier factory- designed, surface-mount assembly fully tested and ready for ...

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CH1_GN R1 DNI J1 GN1 VGA1_NEG J2 INM1 R4 69.8Ω JP2 VGA1_POS J3 INP1 R3 69.8Ω VGA2_POS J4 INP2 R6 69.8Ω VGA2_NEG J5 INM2 R5 JP3 69.8Ω CH2_GN J6 GN2 R7 DNI NOTES 1. PARTS IN GRAY ARE NOT INSTALLED. ...

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AD605 Figure 45. AD605-EVALZ Assembly Figure 46. AD605-EVALZ Primary Side Copper Figure 47. AD605-EVALZ Secondary Side Copper Figure 48. AD605-EVALZ Internal Ground Plane Figure 49. AD605-EVALZ Internal Power Plane Figure 50. AD605-EVALZ Primary Side Silkscreen Rev Page 20 ...

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OUTLINE DIMENSIONS 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN ...

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... AD605AR-REEL7 −40°C to +85°C AD605ARZ 1 −40°C to +85°C 1 AD605ARZ-RL −40°C to +85°C 1 AD605ARZ-R7 −40°C to +85°C AD605BN −40°C to +85°C AD605BR −40°C to +85°C AD605BR-REEL −40°C to +85°C AD605BR-REEL7 −40°C to +85°C ...

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NOTES Rev Page AD605 ...

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AD605 NOTES ©1996–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00541-0-6/08(F) Rev Page ...