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AD604

Rev. E | Page 9 of 32

1000

0.1

VGN = 2.9V

VGN (V)

100

E (n

)

0.1

0.5

0.9

1.3

1.7

2.1

2.5

2.9

Figure 15. Input Referred Noise vs. VGN

900

850

800

750

700

650

600

TEMPERATURE (°C)

(

)

VGN = 2.9V

–40

–20

FREQUENCY (Hz)

740

Figure 16. Input Referred Noise vs. Temperature

770

745

760

765

750

755

VGN = 2.9V

100k

10M

ISE (

)

Figure 17. Input Referred Noise vs. Frequency

SOURCE

(

Ω

)

100

(

)

SOURCE

ALONE

(

10k

100

15
14
13
12

9
8
7

Figure 18. Input Referred Noise vs. R

SOURCE

VGN = 2.9V

SOURCE

(

Ω

)

(

Figure 19. Noise Figure vs. R

SOURCE

VGN (V)

= 240

Ω

0.4

0.8

1.2

1.6

2.0

2.4

2.8

Figure 20. Noise Figure vs. VGN

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Содержание AD604

Страница 1: ...annel of the AD604 provides a 300 k input resistance and unipolar gain control for ease of use User determined gain ranges gain scaling dB V and dc level shifting of output further optimize performanc...

Страница 2: ...8 Rev D to Rev E Changes to Figure 1 1 Changes to Figure 37 13 Changes to Figure 41 15 Changes to Evaluation Board Model Name 24 Changes to Ordering Guide 29 1 08 Rev C to Rev D Changes to AC Coupling...

Страница 3: ...Voltage Noise VGN 2 9 V 1 8 nV Hz Input Current Noise VGN 2 9 V 2 7 pA Hz Noise Figure RS 50 f 10 MHz VGN 2 9 V 8 4 dB RS 200 f 10 MHz VGN 2 9 V 12 dB Common Mode Rejection Ratio f 1 MHz VGN 2 65 V 2...

Страница 4: ...Gain Range Preamplifier gain 14 dB 0 to 48 dB Preamplifier gain 20 dB 6 to 54 dB Input Voltage VGN Range 20 dB V VREF 2 5 V 0 1 to 2 9 V Input Bias Current 0 4 A Input Resistance 2 M Response Time 48...

Страница 5: ...N 35 C W AD604AR 38 C W AD604ARS 34 C W 1 Pin 1 Pin 2 Pin 11 to Pin 14 Pin 23 and Pin 24 are part of a single supply circuit The part is likely to suffer damage if any of these pins are accidentally c...

Страница 6: ...is connected to positive supply Preamplifier 2 shuts down 8 PAI2 Channel 2 Preamplifier Positive Input 9 FBK2 Channel 2 Preamplifier Feedback Pin 10 PAO2 Channel 2 Preamplifier Output 11 DSX2 Channel...

Страница 7: ...4dB TO 34dB G PREAMP 14dB 0dB TO 48dB 00540 004 Figure 4 Gain vs VGN for Different Preamplifier Gains VGN V 10 50 20 40 30 10 0 GAIN dB 0 1 0 5 0 9 1 3 1 7 2 1 2 5 2 9 ACTUAL ACTUAL 20dB V VREF 2 5V 3...

Страница 8: ...LTA GAIN dB PERCENTAGE 25 20 15 10 5 0 1 0 0 8 0 6 0 4 0 2 0 1 0 3 0 5 0 7 0 9 N 50 VGN1 2 50V VGN2 2 50V G dB G CH1 G CH2 00540 011 Figure 11 Gain Match VGN1 VGN2 2 50 V VGN 2 9V VGN 2 5V VGN 1 5V VG...

Страница 9: ...e vs Temperature 770 745 760 765 750 755 VGN 2 9V 100k 1M 10M NOISE pV Hz 7 00540 01 Figure 17 Input Referred Noise vs Frequency RSOURCE 1 10 100 1k NOISE nV Hz RSOURCE ALONE 00540 018 NOISE FIGURE dB...

Страница 10: ...60 50 500 DUT RS RSOURCE 0 50 100 150 200 250 VO 1V p p VGN 1V HD3 10MHz HD2 1MHz HD3 1MHz HD2 10MHz 3 00540 02 FREQUENCY MHz 90 120 Figure 23 Harmonic Distortion vs RSOURCE VO 1V p p VGN 1V 30 80 100...

Страница 11: ...500mV Figure 29 Power Up Power Down Response 10 0 100 90 100ns 500mV 500mV 2 9V 0 1V VGN V 00540 030 FREQUENCY Hz CROSSTALK dB 30 10 20 40 50 60 0 70 Figure 30 Gain Response 100k 1M 10M 100M VGN2 0 1V...

Страница 12: ...90 00540 034 SUPPLY CURRENT mA 40 20 0 35 30 25 15 10 5 INPUT BIAS CURRENT A Figure 34 Input Bias Current vs Temperature PREAMP IS AD604 IS DSX IS IS VGN 0 IS AD604 IS PA IS DSX IS AD604 IS PA TEMPER...

Страница 13: ...reamp gain is set to 14 dB and VREF is set to 2 50 V to establish a gain scaling of 20 dB V the gain equation simplifies to G dB 20 dB V VGN V 5 dB The desired gain can then be achieved by setting the...

Страница 14: ...d is independent of gain To achieve optimum specifications power and ground manage ment are critical to the AD604 Large dynamic currents result because of the low resistances needed for the desired no...

Страница 15: ...ended but 350 when driven differentially This is easily explained by thinking of the ladder network as two 175 resistors connected back to back with the middle node MID being biased by the VOCM buffe...

Страница 16: ...dB higher 1 dB if the preamplifier gain is set to 20 dB or 14 dB lower 19 dB if the preamplifier is not used at all Outside the central linear range the gain starts to deviate from the ideal control l...

Страница 17: ...ns it is best to connect a decoupling capacitor to VOCM in which case the common mode voltage of the DSX is half the supply voltage which allows for maximum signal swing Nevertheless the common mode v...

Страница 18: ...gital converter AD9050 VREF requires a voltage of 1 25 V to 2 5 V with between 40 dB V and 20 dB V gain scaling respectively Voltage VGN controls the gain its nominal operating range is from 0 25 V to...

Страница 19: ...pass filter with a 3 dB corner frequency of about 9 1 kHz VOCM is decoupled to ground by a 0 1 F capacitor while VREF can be externally provided in this application the gain scale is set to 20 dB V by...

Страница 20: ...s set by R8 and C11 integrates the error signal presented by the low pass filter and changes VG until the error signal is equal to VSET For example if the signal presented to the detector is V1 A cos...

Страница 21: ...rs they clip around 2 2 V due to having to drive an effective load of about 30 If a different input common mode voltage needs to be accommodated ac coupling as in Figure 48 is recommended The differen...

Страница 22: ...stortion low noise amplifier The op amp output is ac coupled into the self biasing input of an AD9050 ADC that is capable of outputting 10 bits at a 40 MSPS sampling rate 20 27 28 26 22 14 13 10 15 16...

Страница 23: ...ONAL R3 RGN C6 0 1 F C3 0 1 F C1 0 1 F R2 RGN C4 0 1 F C2 5pF R1 500 C5 0 1 F C12 0 1 F C11 0 1 F C10 0 1 F C9 0 1 F C8 5pF R4 500 0 1 F C7 0 1 F NOTES 1 PAO1 AND PAO2 ARE USED TO MEASURE PREAMPS 2 RG...

Страница 24: ...mper in the top position of JP6 For direct drive of the Channel 2 VGA insert a jumper in JP14 and verify that there are no jumpers in JP12 and JP13 Refer to the schematic shown in Figure 61 for circui...

Страница 25: ...other output impedances DC OPERATING CONDITIONS Table 4 lists the trimmers and their functions provided for convenient dc level adjustments of gain reference voltage and output common mode voltage Ta...

Страница 26: ...057 2 EVALUATION BOARD ARTWORK AND SCHEMATIC 00540 059 Figure 59 Internal Ground Plane 0054 0054 Figure 57 Component Side Copper 00540 058 Figure 58 Secondary Side Copper 0 060 Figure 60 Internal Pow...

Страница 27: ...Reference Designator Manufacturer Part Number 1 Test loop Red 5 V Components Corp TP 104 01 02 1 Test loop Blue 5 V Components Corp TP 104 01 06 5 Test loop Black GND GND1 GND2 GND3 GND4 Components Co...

Страница 28: ...8 26 0 310 7 87 0 300 7 62 0 015 0 38 GAUGE PLANE 0 195 4 95 0 130 3 30 0 115 2 92 Figure 62 24 Lead Plastic Dual In Line Package PDIP Narrow Body N 24 1 Dimensions shown in inches and millimeters 15...

Страница 29: ...ard Small Outline Package SOIC_W RW 24 AD604AR REEL 40 C to 85 C 24 Lead Standard Small Outline Package SOIC_W RW 24 AD604ARZ1 40 C to 85 C 24 Lead Standard Small Outline Package SOIC_W RW 24 AD604ARZ...

Страница 30: ...AD604 Rev E Page 30 of 32 NOTES www BDTIC com ADI...

Страница 31: ...AD604 Rev E Page 31 of 32 NOTES www BDTIC com ADI...

Страница 32: ...AD604 Rev E Page 32 of 32 NOTES 1996 2008 Analog Devices Inc All rights reserved Trademarks and registered trademarks are the property of their respective owners D00540 0 10 08 E www BDTIC com ADI...

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