AD7923BRUZ Analog Devices Inc, AD7923BRUZ Datasheet
AD7923BRUZ
Specifications of AD7923BRUZ
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AD7923BRUZ Summary of contents
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FEATURES Fast throughput rate: 200 kSPS Specified for Low power 3.6 mW max at 200 kSPS with 3 V supply 7.5 mW max at 200 kSPS with 5 V supply 4 (single-ended) ...
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AD7923 TABLE OF CONTENTS Specifications ..................................................................................... 3 Timing Specifications ....................................................................... 5 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin Configuration and Function Description .............................. 7 Typical Performance Characteristics ............................................. 8 Terminology .................................................................................... 10 Control Register Descriptions ...................................................... 12 ...
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SPECIFICATIONS 2 5.25 V, REF = 2 DRIVE IN Table 1. Parameter DYNAMIC PERFORMANCE Signal-to-(Noise + Distortion) (SINAD) 2 Signal-to-Noise (SNR) 2 Total Harmonic Distortion (THD) Peak Harmonic or Spurious Noise ...
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AD7923 Parameter LOGIC OUTPUTS Output High Voltage Output Low Voltage Floating-State Leakage Current Floating-State Output Capacitance 3 Output Coding CONVERSION RATE Conversion Time Track-and-Hold Acquisition Time Throughput Rate POWER REQUIREMENTS DRIVE 4 I ...
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TIMING SPECIFICATIONS ≤ REF DD DRIVE DD Table 2. Limit at T MIN Parameter SCLK 20 ...
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AD7923 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter AV to AGND AGND DRIVE Analog Input Voltage to AGND Digital Input Voltage to AGND Digital Output Voltage to AGND REF to AGND ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTION Table 4. Pin Function Descriptions Pin No. Mnemonic Function 1 SCLK Serial Clock. Logic Input. SCLK provides the serial clock for accessing data for the part. This clock input is also used as the clock ...
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AD7923 TYPICAL PERFORMANCE CHARACTERISTICS –10 –30 –50 –70 –90 –110 FREQUENCY (kHz) Figure 4. Dynamic Performance at 200 kSPS 200kSPS SAMPLE T = 25°C A RANGE = 0V ...
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DRIVE TEMP = 25 ° C 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 512 1024 1536 2048 2560 3072 CODE Figure 10. Typical DNL 3584 4096 Rev ...
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AD7923 TERMINOLOGY Integral Nonlinearity 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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Signal-to-(Noise + Distortion) (SINAD) Ratio 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 the sampling ...
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AD7923 CONTROL REGISTER DESCRIPTIONS The control register on the AD7923 is a 12-bit, write-only register. Data is loaded from the DIN pin of the AD7923 on the falling edge of SCLK. The data is transferred on the DIN line at ...
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Table 8. Power Mode Selection PM1 PM0 Mode 1 1 Normal operation. In this mode, the AD7923 remains in full power mode, regardless of the status of any of the logic inputs. This mode allows the fastest possible throughput rate ...
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AD7923 THEORY OF OPERATION CIRCUIT INFORMATION The AD7923 is a high speed, 4-channel, 12-bit single-supply ADC. The part can be operated from a 2 5.25 V supply. When operated from either supply, ...
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ADC TRANSFER FUNCTION The output coding of the AD7923 is either straight binary or twos complement, depending on the status of the LSB in the control register. The designed code transitions occur at succes- sive LSB values (for example, 1 ...
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AD7923 TYPICAL CONNECTION DIAGRAM Figure 19 shows a typical connection diagram for the AD7923. In this setup the AGND pin is connected to the analog ground plane of the system. In Figure 19, REF IN decoupled 2.5 V supply from ...
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If 2 applied to the REF pin, the analog input range can IN be either 2 depending on the setting of the range bit in the control register. ...
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AD7923 Only a portion of the cycle time is taken up by the conversion time and the dummy transfer for wakeup. In this mode, the power con-sumption of the part is greatly reduced because the part enters shutdown at the ...
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PART IS IN UNKNOWN MODE AFTER POWER- SCLK DOUT INVALID DATA DIN DIN LINE HIGH FOR FIRST DUMMY CONVERSION Figure 23. Placing the AD7923 into Normal Mode after Supplies are First Applied CS SCLK DOUT DIN Figure 24. ...
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AD7923 For example, if the AD7923 is operated in a continuous samp- ling mode, with a throughput rate of 200 kSPS and an SCLK of 20 MHz ( V), and the device is placed in auto shut- DD ...
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SCLK t 3 ZERO ADD1 DOUT THREE- 2 IDENTIFICATION STATE BITS ZERO t 9 WRITE SEQ1 DONTC DIN CS SCLK DOUT DIN MICROPROCESSOR INTERFACING The serial interface on the AD7923 allows the part to be ...
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AD7923 The connection diagram is shown in Figure 30. The ADSP-218x has the TFS and RFS of the SPORT tied together, with TFS set as an output and RFS set as an input. The DSP operates in alternate framing mode ...
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APPLICATION HINTS GROUNDING AND LAYOUT The AD7923 has very good immunity to noise on the power supplies as can be seen by the PSRR vs. supply ripple frequency plot, Figure 6. However, care should still be taken in grounding and ...
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... AD7923BRU-REEL −40°C to +125°C AD7923BRU-REEL7 −40°C to +125°C 2 AD7923BRUZ −40°C to +125°C 2 AD7923BRUZ-REEL −40°C to +125°C 2 AD7923BRUZ-REEL7 −40°C to +125° EVAL-AD7923CBZ 4 EVAL-CONTROL BRD2 1 Linearity error refers to integral linearity error RoHS Compliant Part. 3 This can be used as a standalone evaluation board or in conjunction with the evaluation controller board for evaluation/demonstration purposes. ...