AD604 Analog Devices, AD604 Datasheet
AD604
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AD604 Summary of contents
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... V is not used for gain control. In fact when the gain control voltage is <50 mV the amplifier channel is powered down to 1.9 mA. The AD604 is available in a 24-pin plastic SSOP, SOIC and DIP, and is guaranteed for operation over the – +85 C temperature range. ...
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... AD604–SPECIFICATIONS (Each Amplifier Channel + range (preamplifier gain = +14 dB), VOCM = 2 and C2 = 0.1 F (see Figure 35) unless otherwise noted) Parameter INPUT CHARACTERISTICS Preamplifier Input Resistance Input Capacitance Input Bias Current Peak Input Voltage Input Voltage Noise Input Current Noise ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD604 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... PIN DESCRIPTIONS PIN CONFIGURATION –DSX1 1 24 VGN1 +DSX1 2 23 VREF PAO1 3 22 OUT1 4 FBK1 21 GND1 5 PAI1 20 VPOS AD604 COM1 6 19 VNEG TOP VIEW (Not to Scale) COM2 7 18 VNEG 8 PAI2 17 VPOS FBK2 9 16 GND2 10 15 PAO2 OUT2 ...
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... Typical Performance Characteristics (per Channel)–AD604 (Unless otherwise noted G (preamp) = +14 dB CURVES – + –10 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 VGN – Volts Figure 1. Gain vs. VGN 40 37.5 THEORETICAL 35 32.5 ACTUAL 30 27.5 25 22.5 20 1.25 1.5 1.75 2 2.25 2.5 V – Volts REF Figure 4. Gain Scaling vs. V REF 2.0 1.5 1.0 20dB/V VREF = 2.50V ...
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... AD604–Typical Performance Characteristics (per Channel) (Unless otherwise noted G (preamp) = +14 dB VGN = 2.5V 40 VGN = 2.9V 30 VGN = 1. VGN = 0.5V 0 VGN = 0.1V –10 –20 –30 VGN = 0.0V –40 –50 100k 1M 10M 100M FREQUENCY – Hz Figure 10. AC Response 1000 100 10 1 0.1 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 VGN – Volts Figure 13. Input Referred Noise vs. ...
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... VGN – Volts Figure 23 Compression vs. VGN 200 V = 200mV p-p O VGN = 1.5V TRIG'D –200 253ns 1.253µs 100ns / DIV Figure 26. Small Signal Pulse Response –7– AD604 – p VGN = 1.0V DUT 500 50 –30 HD2(10MHz) –40 HD3(10MHz) –50 HD2(1MHz) –60 HD3(1MHz) –70 –80 ...
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... VGN = 2.9V –20 VGN = 2.5V –30 VGN = 2.0V –40 –50 VGN = 0.1V –60 100k 1M 10M 100M FREQUENCY – Hz Figure 30. DSX Common-Mode Rejection vs. Frequency 40 +I (AD604 (PA (DSX – I (AD604) = –I (PA AD604 (+ DSX (+ PRE-AMP ( (VGN = –40 –20 ...
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... VOCM R4 C3 200k EXT. Figure 35. Simplified Block Diagram of a Single Channel of the AD604 1 To understand the active-feedback amplifier topology, refer to the AD830 data sheet. The AD830 is a practical implementation of the idea. REV. 0 Since the two channels are identical, only Channel 1 will be used to describe their operation ...
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... Figure 36 shows how the preamplifier is set to gains of +14, +17.5 and +20 dB. The gain range of a single channel of the AD604 +48 dB when the preamplifier is set to +14 dB (Figure 36a), 3 +51.5 dB for a preamp gain of +17.5 dB (Figure 36b), and for the highest preamp gain of +20 dB (Figure 36c) ...
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... F, then together with the 175 into each side of the differential ladder of the DSX, a –3 dB high pass corner at 9.1 kHz is formed. If the AD604 output needs to be ground referenced, then an- other ac coupling capacitor will be required for level shifting. This capacitor will also eliminate any dc offsets contributed by the DSX. With a nominal load of 500 capacitor, this adds a high pass filter with – ...
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... G2 times g transconductance of G2) has to be equal to the differential input voltage to G1 times g OF AD604 WITH PREAMPLIFIER fore the overall gain function of the AFA is: SET TO 14dB where V 2 ...
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... DSX portion can be used independently. This may be of value when one desires to cas- cade the two DSX stages in the AD604. In this case the first DSX output signal with respect to noise will be large and using the second preamplifier at this point would be a waste of power 0.1µ ...
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... If the maximum signal at Pin OUT2 of the AD604 is limited to be 400 mV (+2 dBm), then the in- put signal level at the AGC threshold rms (–79 dBm). The circuit as shown has about 40 MHz of noise bandwidth; the ...
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... Figure 47. Control Voltage vs. Input Power of Circuit in Figure 46 at –15– AD604 24 1 VGN1 –DSX1 2 VREF 23 +DSX1 3 OUT1 22 PAO1 4 GND1 21 FBK1 5 VPOS 20 PAI1 AD604 VNEG 6 COM1 19 VNEG 18 7 COM2 C6 R2 499 560pF 8 VPOS 17 PAI2 9 FBK2 GND2 PAO2 OUT2 C3 C5 0.1µF ...
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... Figure 49. Output of VGA in Figure 48 for V +5V Medical Ultrasound TGC Driving the AD9050, a 10-Bit, –5V 40 MSPS A/D –5V The AD604 is an ideal candidate for the TGC (Time Gain +5V C6 Control) amplifier that is required in medical ultrasound sys- R2 0.1µF 453 tems to limit the dynamic range of the signal that is presented to VOUT– ...
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... AD9050 VREF D7 17 OUT 18 4 VREF D6 IN COMP A/D OUTPUT REF AINB D3 25 0.1µ AIN ENCODE (LSB +5V 20 +5V 22 CLK 0.1µF 0.1µF 0.1µF HP3577B OUT A R POWER SPLITTER 0.1µF 450 PAI AD604 DUT 49.9 50 ...
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... AD604 Small Outline IC Package (R-24) 0.6141 (15.60) 0.5985 (15.20 PIN 1 0.1043 (2.65) 0.0926 (2.35) 0.0118 (0.30) 0.0500 0.0192 (0.49) SEATING 0.0125 (0.32) (1.27) 0.0138 (0.35) 0.0040 (0.10) PLANE BSC 0.0091 (0.23) 0.078 (1.98) 0.068 (1.73) 0.008 (0.203) 0.002 (0.050) OUTLINE DIMENSIONS Dimensions shown in inches and (mm PIN 1 0.210 (5.33) MAX 0.0291 (0.74 0.200 (5.05) 0.0098 (0.25) ...
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