Datasheet AD8335 (Analog Devices) - 3

Data Sheet AD8335 SPECIFICATIONS
VS = 5 V, TA = 25°C, RL = 500 Ω, f = 5 MHz, CL = 10 pF, low gain range (−10 dB to +38 dB), RFB = 249 Ω (PrA RIN = 50 Ω) and signal voltage specified differential, per channel performance, dBm (50 Ω), unless otherwise noted.
Table 1. Parameter Test Conditions/Comments Min Typ Max Unit
PrA CHARACTERISTICS Gain Single-ended input to differential output 18 dB Single-ended input to single-ended output 12 dB Input Voltage Range PrA output limited to 5 V p-p differential 625 mV p-p Input Resistance RFB = 249 Ω 50 Ω RFB = 374 Ω 75 Ω RFB = 499 Ω 100 Ω RFB = ∞, low frequency value into PIPx 14.7 kΩ Input Capacitance PIPx (Pin 2, Pin 15, Pin 18, Pin 63) 1.5 pF −3 dB Small Signal Bandwidth With RFB = 249 Ω 110 MHz Input Voltage Noise RS = 0 Ω, RFB = ∞ 1.15 nV/√Hz Input Current Noise 2.4 pA/√Hz Noise Figure Active Termination Match RS = RIN = 50 Ω, RFB = 249 Ω 7 dB Unterminated RS = 50 Ω, RFB = ∞ 4.4 dB PrA + VGA CHARACTERISTICS −3 dB Small Signal Bandwidth Unterminated: RS = 50 Ω, RFB = ∞ 70 MHz Matched: RS = RIN = 50 Ω 85 MHz Slew Rate Low gain, VGN = 3 V, VOUT = 2 V p-p 250 V/μs High gain, VGN = 3 V, VOUT = 2 V p-p 350 V/μs Input Voltage Noise VGNx pins = 3 V, RS = 0 Ω, RFB = ∞ 1.3 nV/√Hz Noise Figure VGNx pins = 3 V, f = 1 MHz to 10 MHz Active Termination Match RS = RIN = 50 Ω 7 dB RS = RIN = 100 Ω 4.5 dB Unterminated RS = 50 Ω, RFB = ∞ 5.0 dB RS = 500 Ω, RFB = ∞ 1.3 dB Output Referred Noise Low gain; VGN < 2 V 33 nV/√Hz High gain; VGN < 2 V 80 nV/√Hz Peak Output Voltage Differential, RL ≥ 500 Ω 5 V p-p Output Resistance f < 1 MHz, VOHx, VOLx pins 1.2 Ω Common-Mode Level Set to midsupply for PrA and VGA VS/2 V Output Offset Voltage Differential Between VOHx pins and VOLx pins, full gain range −25 +5 +35 mV Common-Mode Between VOHx pins and VCMx pins, and between −20 +0 +20 mV VOLx pins and VCMx pins Harmonic Distortion VOUT = 1 V p-p, low gain, VGN = 2 V HD2 f = 1 MHz −69 dBc HD3 f = 1 MHz −57 dBc HD2 f = 10 MHz −57 dBc HD3 f = 10 MHz −55 dBc Harmonic Distortion VOUT = 1 V p-p, high gain, VGN = 2 V HD2 f = 1 MHz −58 dBc HD3 f = 1 MHz −70 dBc HD2 f = 10 MHz −55 dBc HD3 f = 10 MHz −55 dBc Output 1 dB Compression (OP1dB) VGN = 3 V 18 dBm VGN = 3 V 8 dBV peak Rev. B | Page 3 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS THEORY OF OPERATION ENABLE SUMMARY PREAMP Noise VGA Optimizing the System Dynamic Range Attenuator Gain Control Output Stage VGA Noise APPLICATIONS INFORMATION ULTRASOUND BASIC CONNECTIONS PREAMP CONNECTIONS INPUT OVERDRIVE Input Overload Protection LOGIC INPUTS COMMON-MODE PINS DRIVING ADCs EVALUATION BOARD BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE