EVAL-AD7934-6CB AD [Analog Devices], EVAL-AD7934-6CB Datasheet
EVAL-AD7934-6CB
Related parts for EVAL-AD7934-6CB
EVAL-AD7934-6CB Summary of contents
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FEATURES Throughput rate: 625 kSPS Specified for Power consumption 3.6 mW max at 625 kSPS with 3 V supplies 7.5 mW max at 625 kSPS with 5 V supplies 4 analog input ...
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... ADC Transfer Function............................................................. 15 Typical Connection Diagram ................................................... 16 Analog Input Structure.............................................................. 16 Analog Input Configurations ................................................... 17 Analog Input Selection .............................................................. 19 Reference Section ....................................................................... 20 Parallel Interface......................................................................... 21 Power Modes of Operation ....................................................... 24 Power vs. Throughput Rate....................................................... 25 Microprocessor Interfacing....................................................... 25 Application Hints ........................................................................... 27 Grounding and Layout .............................................................. 27 Evaluating the AD7934-6 Performance .................................. 27 Outline Dimensions ....................................................................... 28 Ordering Guide .......................................................................... 28 Rev Page ...
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SPECIFICATIONS 2 5.25 V, internal/external V DD DRIVE unless otherwise noted. A MIN MAX Table 2. Parameter DYNAMIC PERFORMANCE 2 Signal-to-Noise + Distortion (SINAD) 2 Signal-to-Noise Ratio ...
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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 f ...
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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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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Description Pin No. Mnemonic Description 1 V Power Supply Input. The AGND with a 0.1 µF capacitor and a 10 µF tantalum capacitor Word/Byte Input. ...
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AD7934-6 Pin No. Mnemonic Description 21 RD Read Input. Active low logic input used in conjunction with CS to access the conversion result. The conversion result is placed on the data bus following the falling edge of RD read while ...
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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, a point 1 LSB below the first code transition, ...
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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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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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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 of the bits are ...
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AD7934-6 SEQUENCER OPERATION The configuration of the SEQ0 and SEQ1 bits in the control register allow the user to use the sequencer function. Table 10 outlines the two sequencer modes of operation. Table 10. Sequence Selection Modes SEQ0 SEQ1 Sequence ...
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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 ( Ω SOURCE Figure 20. THD vs. Source Impedance in Single-Ended Mode – 50kHz IN –65 –70 –75 –80 ...
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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 p-p ...
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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 used ...
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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 Pins DB0 to DB11. ...
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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 MSx control line is actually three memory select ...
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... PC via the evaluation board controller. The evaluation board controller can be used in conjunction with the AD7934-6 evaluation board, as well as with many other ADI evaluation boards ending in the CB designator, to demonstrate/evaluate the ac and dc performance of the AD7934-6. ...
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... AD7934BRUZ-6 −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. 3 This can be used as a standalone evaluation board or in conjunction with the Evaluation Board Controller for evaluation/demonstration purposes. ...