AD604ARZ Analog Devices Inc, AD604ARZ Datasheet
AD604ARZ
Specifications of AD604ARZ
Available stocks
Related parts for AD604ARZ
AD604ARZ Summary of contents
Page 1
FEATURES Ultralow input noise at maximum gain 0.80 nV/√Hz, 3.0 pA/√Hz 2 independent linear-in-dB channels Absolute gain range per channel programmable (preamplifier gain = 14 dB) through (preamplifier gain = ...
Page 2
AD604 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 ...
Page 3
SPECIFICATIONS Each amplifier channel 25° range (preamplifier gain = 14 dB), VOCM = 2 and C2 = 0.1 μF (see Figure 37), unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Preamplifier Input ...
Page 4
AD604 Parameter ACCURACY Absolute Gain Error Gain Scaling Error Output Offset Voltage Output Offset Variation GAIN CONTROL INTERFACE Gain Scaling Factor Gain Range Input Voltage ...
Page 5
ABSOLUTE MAXIMUM RATINGS Table Parameter Supply Voltage ±V S Pin 17 to Pin 20 (with Pin 16, Pin Input Voltages Pin 1, Pin 2, Pin 11, Pin 12 Pin 4, Pin 9 Pin ...
Page 6
AD604 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 –DSX1 Channel 1 Negative Signal Input to DSX1. 2 +DSX1 Channel 1 Positive Signal Input to DSX1. 3 PAO1 Channel 1 Preamplifier Output. 4 ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, G (preamplifier dB, VREF = 2.5 V (20 dB/V scaling MHz ± –10 0.1 0.5 0.9 1.3 1.7 ...
Page 8
AD604 2.0 1.5 1.0 0.5 0 –0.5 30dB/V VREF = 1.67V –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 Scaling Values –1.0 –0.8 –0.6 ...
Page 9
VGN (V) Figure 15. Input Referred Noise vs. VGN 900 VGN = 2.9V 850 800 750 700 650 600 –40 – TEMPERATURE (°C) Figure 16. Input ...
Page 10
AD604 – p-p O VGN = 1V –45 –50 HD2 –55 HD3 –60 –65 –70 100k 1M FREQUENCY (Hz) Figure 21. Harmonic Distortion vs. Frequency – p-p O –35 –40 –45 –50 –55 HD3 ...
Page 11
Figure 27. Large Signal Pulse Response 200 TRIG'D –200 253ns 100ns/DIV Figure 28. Small Signal Pulse Response 500mV 2.9V 100 500mV Figure 29. Power-Up/Power-Down Response p-p O VGN = ...
Page 12
AD604 1M 100k 10k 1k 100 10k 100k 1M FREQUENCY (Hz) Figure 33. Input Impedance vs. Frequency 27.6 27.4 27.2 27.0 26.8 26.6 26.4 26.2 26.0 25.8 –40 – TEMPERATURE (°C) Figure 34. Input Bias ...
Page 13
THEORY OF OPERATION The AD604 is a dual-channel VGA with an ultralow noise preamplifier. Figure 37 shows the simplified block diagram of one channel. Each identical channel consists of a preamplifier with gain setting resistors (R5, R6, and R7) and ...
Page 14
AD604 PREAMPLIFIER The input capability of the following single-supply DSX (2.5 ± for supply) limits the maximum input voltage of the preamplifier to ±400 mV for the 14 dB gain configuration or ±200 mV for ...
Page 15
The larger portion of the input referred voltage noise comes from the amplifier with 0.63 nV/√Hz. The current noise is independent of gain and depends only on the bias current in the input stage of the preamplifier, which is 3 ...
Page 16
AD604 AC COUPLING The DSX portion of the AD604 is a single-supply circuit and, therefore, its inputs need to be ac-coupled to accommodate ground-based signals. External Capacitors C1 and C2 in Figure 37 level shift the ground referenced preamplifier output ...
Page 17
The AFA offers the following additional features: • The ability to invert the signal by switching the positive and negative inputs to the ladder network • The possibility of using DSX1 input as a second signal input • Fully differential ...
Page 18
AD604 APPLICATIONS INFORMATION The basic circuit in Figure 43 shows the connections for one channel of the AD604. The signal is applied at Pin 5. RGN is normally 0, in which case the preamplifier is set to a gain of ...
Page 19
C1 0.1µF –DSX1 VGN1 1 +DSX1 VREF 2 C2 AD604 0.1µF PAO1 OUT1 3 FBK1 GND1 4 PAI1 VPOS VIN 5 R1 (MAX 49.9Ω 800mV p-p) COM1 VNEG 6 COM2 VNEG 7 8 PAI2 VPOS FBK2 GND2 9 C3 PAO2 ...
Page 20
AD604 The 50 Ω termination resistor, in parallel with the 50 Ω source resistance of the signal generator, forms an effective resistance of 25 Ω as seen by the input of the preamplifier, creating 4.07 μV of rms noise at ...
Page 21
At 1 MHz, the attenuation is about −0.2 dB, increasing to − MHz and − 100 MHz. Signals less than approximately 1 MHz are not significantly affected. Figure 49 shows the control voltage vs. the ...
Page 22
AD604 MEDICAL ULTRASOUND TGC DRIVING THE AD9050, A 10-BIT, 40 MSPS ADC The AD604 is an ideal candidate for the time gain control (TGC) amplifier that is required in medical ultrasound systems to limit the dynamic range of the signal ...
Page 23
C3 0.1µF VGN1 –DSX1 1 24 +DSX1 VREF 0.1µF PAO1 PAO1 OUT1 3 22 NOTE 2 R2 RGN GND1 FBK1 4 21 AD604 PAI1 VPOS IN1 5 20 COM1 VNEG 6 19 COM2 VNEG 7 18 PAI2 ...
Page 24
AD604 EVALUATION BOARD Figure photograph of the AD604 evaluation board assembly. Multiple input connections, testpoints, switch-selectable options, and on-board trims offer convenience when configuring the AD604 in various operating modes. The evaluation board requires only a dual ...
Page 25
PREAMPLIFIER GAIN The default gain of the preamplifier achieved with 0 Ω resistors in the R11and R12 positions. The 14 dB and 20 dB preset gains are accurate because of the close matching of ...
Page 26
AD604 EVALUATION BOARD ARTWORK AND SCHEMATIC Figure 58. Component Side Copper Figure 59. Secondary Side Copper Figure 60. Internal Ground Plane Figure 61. Internal Power Plane Figure 62. Component Side Silkscreen of the AD604 Evaluation Board Rev Page ...
Page 27
V – 10µF 10µF + 10V 10V +5V –5V VGA1 –DSX1 –IN VG1–IN C8 0.1µF SMA R5 66.5Ω GND VGA1 1 +DSX1 +IN VG1+IN –DSX1 C9 0.1µF SMA 2 R6 +DSX1 66.5Ω PAO1 PAO1 3 PAO1 ...
Page 28
AD604 OUTLINE DIMENSIONS 24 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 ...
Page 29
... AD604ANZ −40°C to +85°C AD604AR −40°C to +85°C AD604AR-REEL −40°C to +85°C AD604ARZ −40°C to +85°C AD604ARZ-RL −40°C to +85°C AD604ARS −40°C to +85°C AD604ARS-REEL7 −40°C to +85°C AD604ARSZ −40°C to +85°C AD604ARSZ-RL − ...
Page 30
AD604 NOTES Rev Page ...
Page 31
NOTES Rev Page AD604 ...
Page 32
AD604 NOTES ©1996–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00540-0-12/10(G) Rev Page ...