ad7934bru-6reel7 Analog Devices, Inc., ad7934bru-6reel7 Datasheet
ad7934bru-6reel7
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ad7934bru-6reel7 Summary of contents
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... No. of Bits No. of Channels AD7938/AD7939 12/10 8 AD7933/AD7934 10/12 4 AD7938 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2005–2007 Analog Devices, Inc. All rights reserved. AD7934-6 AD7934-6 CLKIN CONVST AND BUSY V DRIVE DGND Speed 1.5 MSPS 1.5 MSPS 625 kSPS www.analog.com ...
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AD7934-6 TABLE OF CONTENTS Features .............................................................................................. 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and ...
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SPECIFICATIONS 2 5.25 V, internal/external V DD DRIVE unless otherwise noted. A MIN MAX X Table 2. Parameter DYNAMIC PERFORMANCE 2 Signal-to-Noise + Distortion (SINAD) 2 Signal-to-Noise ...
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AD7934-6 Parameter REFERENCE INPUT/OUTPUT 5 V Input Voltage REF 4 DC Leakage Current V Output Voltage REFOUT V Temperature Coefficient REFOUT V Noise REF V Output Impedance REF V Input Capacitance REF LOGIC INPUTS Input High Voltage, V INH Input ...
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TIMING SPECIFICATIONS 2 5.25 V, internal/external V DD DRIVE unless otherwise noted. A MIN MAX Table 3. 1 Parameter Limit Unit MIN MAX 2 ...
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AD7934-6 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to AGND/DGND AGND/DGND DRIVE Analog Input Voltage to AGND Digital Input Voltage to DGND DRIVE DD Digital Output Voltage ...
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AD7934-6 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 V Power Supply Input. The AGND with a 0.1 μF capacitor and a 10 μF tantalum capacitor. 2 W/B Word/Byte Input. ...
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AD7934-6 Pin No. Mnemonic Description 22 CS Chip Select. Active low logic input used in conjunction with RD and WR to read conversion data or write data to the control register. 23 AGND Analog Ground. This is the ground reference ...
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TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. A –60 100mV p-p SINE WAVE ON V AND/ DECOUPLING DIFFERENTIAL/SINGLE-ENDED MODE –70 INT REF –80 –90 EXT REF –100 –110 –120 10 210 410 SUPPLY RIPPLE FREQUENCY ...
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AD7934-6 4 SINGLE-ENDED MODE POSITIVE DNL 0 NEGATIVE DNL –1 0.25 0.50 0.75 1.00 1.25 1.50 V (V) REF Figure 9. DNL vs. V for V REF DIFFERENTIAL MODE 10 SINGLE-ENDED MODE 9 V ...
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TERMINOLOGY Integral Nonlinearity (INL) This is the maximum deviation from a straight line passing through the endpoints of the ADC transfer function. The endpoints of the transfer function are zero scale, 1 LSB below the first code transition, and full ...
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AD7934-6 Track-and-Hold Acquisition Time The track-and-hold amplifier returns to track mode at the end of conversion. The track-and-hold acquisition time is the time required for the output of the track-and-hold amplifier to reach its final value, within ±½ LSB, after ...
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CONTROL REGISTER The control register on the AD7934 12-bit, write-only register. Data is written to this register using the CS and WR pins. The control register is shown in Table 6 and the functions Table 6. Control Register ...
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AD7934-6 SEQUENCER OPERATION The configuration of the SEQ0 and SEQ1 bits in the control register allows the user to use the sequencer function. Table 10 outlines the two sequencer modes of operation. Writing to the Control Register to Program the ...
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CIRCUIT INFORMATION The AD7934 fast, 4-channel, 12-bit, single-supply, successive approximation analog-to-digital converter. The part operates from a 2 5.25 V power supply and features throughput rates up to 625 kSPS. The AD7934-6 provides the user with ...
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AD7934-6 1 LSB = 2 × V /4096 REF 011...111 011...110 000...001 000...000 111...111 100...010 100...001 100...000 – LSB V REF REF Figure 17. Ideal Transfer Characteristic with Twos Complement Output Coding and TYPICAL CONNECTION ...
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F = 50kHz IN –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 10 100 R (Ω) SOURCE Figure 20. THD vs. Source Impedance in Single-Ended Mode – 50kHz IN –65 –70 –75 –80 –85 V ...
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AD7934-6 V REF p-p V REF p-p COMMON-MODE VOLTAGE *ADDITIONAL PINS OMITTED FOR CLARITY. Figure 24. Differential Input Definition The amplitude of the differential signal is the difference between the signals applied to the V and V pins in each ...
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V p-p REF V+ 440Ω GND 27Ω V– 220Ω 220Ω 220Ω V+ 27Ω A V– + 10kΩ 20kΩ Figure 27. Dual Op Amp Circuit to Convert a Single-Ended Bipolar Signal into a Differential Unipolar Signal 220Ω V ...
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AD7934-6 The ADC then returns to Channel 0 and starts the sequence again. The WR input must be kept high to ensure that the control register is not accidentally overwritten and the sequence inter- rupted. This pattern continues until the ...
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PARALLEL INTERFACE The AD7934-6 has a flexible, high speed, parallel interface. This interface is 12 bits wide and is capable of operating in either word (W/ B tied high) or byte (W/ B tied low) mode. The CONVST signal is ...
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AD7934-6 Reading Data from the AD7934-6 With the W/ B pin tied logic high, the AD7934-6 interface operates in word mode. In this case, a single read operation from the device accesses the conversion data-word on Pin DB0 to Pin ...
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Writing Data to the AD7934-6 With W/ B tied logic high, a single write operation transfers the full data-word on DB0 to DB11 to the control register on the AD7934-6. The DB8/HBEN pin assumes its DB8 function. Data written to ...
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AD7934-6 POWER MODES OF OPERATION The AD7934-6 has four different power modes of operation. These modes are designed to provide flexible power manage- ment options. Different options can be chosen to optimize the power dissipation/throughput rate ratio for differing applications. ...
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POWER vs. THROUGHPUT RATE A considerable advantage of powering the ADC down after a conversion is that the part’s power consumption is significantly reduced at lower throughput rates. When using the different power modes, the AD7934-6 is only powered up ...
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AD7934-6 AD7934-6 to ADSP-21065L Interface Figure 42 shows a typical interface between the AD7934-6 and the ADSP-21065L SHARC processor. This interface is an example of one of three DMA handshake modes. The MS control line is actually three memory select ...
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APPLICATION HINTS GROUNDING AND LAYOUT The printed circuit board that houses the AD7934-6 should be designed so that the analog and digital sections are separated and confined to certain areas of the board. This facilitates the use of ground planes ...
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... AD7934-6 OUTLINE DIMENSIONS PIN 1 0.15 0.05 COPLANARITY ORDERING GUIDE Model Temperature Range AD7934BRU-6 −40°C to +85°C AD7934BRU-6REEL7 −40°C to +85°C AD7934BRUZ-6 2 −40°C to +85°C 2 AD7934BRUZ-6REEL7 −40°C to +85°C 3 EVAL-AD7934-6CB 4 EVAL-CONTROL-BRD2 1 Linearity error here refers to integral linearity error Pb-free part. ...