EVAL-AD7441CBZ Analog Devices Inc, EVAL-AD7441CBZ Datasheet
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EVAL-AD7441CBZ
Specifications of EVAL-AD7441CBZ
EVAL-AD7441CBZ Summary of contents
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FEATURES Fast throughput rate: 1 MSPS Specified for Low power at maximum throughput rate maximum at 1 MSPS with V DD 9.25 mW maximum at 1 MSPS with V Pseudo ...
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... Reference ..................................................................................... 15 Serial Interface ............................................................................ 16 Modes of Operation ....................................................................... 18 Normal Mode.............................................................................. 18 Power-Down Mode.................................................................... 18 Power vs. Throughput Rate....................................................... 20 Microprocessor and DSP Interfacing ...................................... 20 Grounding and Layout Hints.................................................... 22 Evaluating Performance ............................................................ 22 Outline Dimensions ....................................................................... 23 Ordering Guide .......................................................................... 24 2/04—Rev Rev. A Updated Format.....................................................................Universal Changes to General Description ....................................................... 1 Changes to Table 1 Footnotes ............................................................ 4 Changes to Table 2 Footnotes ............................................................ 6 Changes to Table 3 Footnotes ...
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SPECIFICATIONS MHz SCLK versions: −40°C to +85°C. Table 1. AD7451 Parameter DYNAMIC PERFORMANCE 1 Signal-to-Noise Ratio (SNR) Signal-to-(Noise + Distortion) (SINAD) 1 Total Harmonic Distortion (THD) 1 Peak ...
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AD7441/AD7451 Parameter CONVERSION RATE Conversion Time 1 Track-and-Hold Acquisition Time Throughput Rate POWER REQUIREMENTS Normal Mode (Static) Normal Mode (Operational) Full Power-Down Mode Power Dissipation Normal Mode (Operational) Full Power-Down 1 See Terminology section. ...
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MHz SCLK B version: −40°C to +85°C. Table 2. AD7441 Parameter DYNAMIC PERFORMANCE Signal-to-(Noise + Distortion) (SINAD) 1 Total Harmonic Distortion (THD) 1 Peak Harmonic or Spurious Noise ...
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AD7441/AD7451 Parameter CONVERSION RATE Conversion Time 1 Track-and-Hold Acquisition Time Throughput Rate POWER REQUIREMENTS Normal Mode (Static) Normal Mode (Operational) Full Power-Down Mode Power Dissipation Normal Mode (Operational) Full Power-Down 1 See the Terminology ...
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TIMING SPECIFICATIONS MHz SCLK Table 3. Parameter Limit Unit MIN MAX kHz min SCLK 18 MHz max t 16 × ...
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AD7441/AD7451 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND IN GND IN– Digital Input Voltage to GND Digital Output Voltage to GND V to GND REF ...
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PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS REF AD7441/ V SCLK 2 7 AD7451 IN+ V SDATA 3 6 IN– TOP VIEW (Not to Scale) GND Figure 5. 8-Lead MSOP Pin Configuration Table 5. Pin ...
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AD7441/AD7451 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° MSPS MHz SCLK 4.75V 3. 2. 100 FREQUENCY (kHz) ...
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POSITIVE DNL 0.5 0 NEGATIVE DNL –0.5 –1 (V) REF Figure 13. Change in DNL vs. V for V REF POSITIVE DNL ...
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AD7441/AD7451 TERMINOLOGY Signal-to-(Noise + Distortion) Ratio (SINAD) This is the measured ratio of SINAD at the output of the ADC. The signal is the rms amplitude of the fundamental. Noise is the sum of all nonfundamental signals up to half ...
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THEORY OF OPERATION CIRCUIT INFORMATION The AD7441/AD7451 are 10-/12-bit, high speed, low power, single-supply, successive approximation, analog-to-digital con- verters (ADCs) with a pseudo differential analog input. These parts operate with a single 2 5.25 V power supply and ...
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AD7441/AD7451 TYPICAL CONNECTION DIAGRAM Figure 22 shows a typical connection diagram for the device. In this setup, the GND pin is connected to the analog ground plane of the system. The V pin is connected to the AD780, REF a ...
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When no amplifier is used to drive the analog input recommended that the source impedance be limited to low values. The maximum source impedance depends on the amount of total harmonic distortion that can be tolerated. The THD ...
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AD7441/AD7451 SERIAL INTERFACE Figure 2 and Figure 3 show detailed timing diagrams for the serial interface of the AD7451 and the AD7441, respectively. The serial clock provides the conversion clock and also controls the transfer of data from the device ...
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Timing Example 1 Having MHz and a throughput rate of 1 MSPS gives a SCLK cycle time of 1/Throughput = 1/1,000,000 = 1 μs A cycle consists 12.5 (1 ...
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AD7441/AD7451 MODES OF OPERATION The operating mode of the AD7441/AD7451 is selected by controlling the logic state of the CS signal during a conversion. There are two operating modes: normal mode and power-down mode. The point at which CS is ...
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PART BEGINS TO POWER SCLK SDATA INVALID DATA brought high before the 10th falling edge of SCLK, the AD7441/AD7451 again go back into power-down. This avoids accidental power-up due to glitches on the ...
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AD7441/AD7451 POWER VS. THROUGHPUT RATE By using the power-down mode on the device when not con- verting, the average power consumption of the ADC decreases at lower throughput rates. Figure 32 shows how, as the through- put rate is reduced, ...
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The timer registers, for example, are loaded with a value that provides an interrupt at the required sample interval. When an interrupt is received, a value is transmitted with TFS/DT (ADC control word). The TFS is used to control the ...
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... PC via the evaluation board controller. The evaluation board controller can be used in conjunction with the AD7441 and the AD7451 evaluation boards, as well as with many other Analog Devices, Inc. evaluation boards ending with the CB designator, to demonstrate and evaluate the ac and dc performance of the AD7441 and the AD7451 ...
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OUTLINE DIMENSIONS INDICATOR 0.15 MAX 2.90 BSC 1.60 BSC 2.80 BSC PIN 1 0.65 BSC 1.95 1.30 BSC 1.15 0.90 1.45 MAX 0.22 0.08 0.38 SEATING 0.22 PLANE COMPLIANT TO JEDEC STANDARDS ...
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... This can be used as a standalone evaluation board or in conjunction with the evaluation board controller for evaluation/demonstration purposes. 4 The evaluation board controller is a complete unit allowing control and communicate with all Analog Devices evaluation boards ending in the CB designators. To order a complete evaluation kit, you must order the ADC evaluation board (EVAL-AD7451CB or EVAL-AD7441CB), the EVAL-CONTROL BRD2, and transformer. See the AD7451/AD7441 application note that accompanies the evaluation kit for more information. © ...