AD7323BRUZ Analog Devices Inc, AD7323BRUZ Datasheet
AD7323BRUZ
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AD7323BRUZ Summary of contents
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FEATURES 12-bit plus sign SAR ADC True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2 +10 V 500 kSPS throughput rate Four analog input channels with channel sequencer Single-ended, true differential, and pseudo ...
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AD7323 TABLE OF CONTENTS Features .............................................................................................. 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Specifications .................................................................. 7 Absolute Maximum Ratings ............................................................ 8 ESD Caution .................................................................................. 8 ...
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SPECIFICATIONS 16 − −16 MHz 500 kSPS SCLK S A MAX Table 2. Parameter 1 Min DYNAMIC PERFORMANCE ...
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AD7323 1 Parameter Min DC ACCURACY Resolution 13 No Missing Codes 12-bit plus sign (13 bits) 11-bit plus sign (12 bits) 2 Integral Nonlinearity 2 Differential Nonlinearity Offset Error 2 4 Offset Error Match , 2 4 ...
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Parameter Min 3 Input Capacitance REFERENCE INPUT/OUTPUT Input Voltage Range 2.5 Input DC Leakage Current Input Capacitance Reference Output Voltage Reference Output Voltage Error at 25°C Reference Output Voltage MIN MAX Reference Temperature Coefficient Reference Output ...
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AD7323 1 Parameter Min Autoshutdown Mode (Static and I CC DRIVE Full Shutdown Mode and I CC DRIVE POWER DISSIPATION Normal Mode (Operational) Full Shutdown Mode 1 Temperature range is ...
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TIMING SPECIFICATIONS 16 − −16 internal/external Timing specifications apply with load, unless otherwise noted. A MAX MIN ...
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AD7323 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted A Table 4. Parameter V to AGND, DGND AGND, DGND AGND, DGND AGND, DGND DRIVE AGND ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 CS Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the AD7323 and frames the serial data transfer. ...
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AD7323 TYPICAL PERFORMANCE CHARACTERISTICS 0 4096 POINT FFT V CC – 25°C A INT/EXT 2.5V REFERENCE –40 ±10V RANGE f = 50kHz IN SNR = 77.30dB –60 SINAD = 76.85dB THD = –86.96dB SFDR ...
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DRIVE ±12V – 25° 500kSPS – +10V SE INTERNAL REFERENCE –65 –70 –75 –80 ±5V SE –85 –90 –95 –100 ...
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AD7323 8k 7600 1201 –3 –2 –1 0 CODE Figure 16. Histogram of Codes, Single-Ended Mode –50 –55 –60 –65 – –75 – ...
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+5V CC DRIVE ±12V – 25°C A INTERNAL REF –60 RANGE = ±10V AND ±2. 500kSPS –65 S SINGLE-ENDED MODE –70 –75 –80 –85 –90 –95 ...
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AD7323 TERMINOLOGY Differential Nonlinearity This is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Integral Nonlinearity This is the maximum deviation from a straight line passing through the endpoints ...
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Channel-to-Channel Isolation Channel-to-channel isolation is a measure of the level of crosstalk between any two channels measured by applying a full-scale, 100 kHz sine wave signal to all unselected input channels and determining the degree to which the ...
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AD7323 THEORY OF OPERATION CIRCUIT INFORMATION The AD7323 is a fast, 4-channel, 12-bit plus sign, bipolar input, serial ADC. The AD7323 can accept bipolar input ranges that include ±10 V, ±5 V, and ±2 can also accept a ...
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Figure 25 shows the differential configuration during the acquisition phase. For the conversion phase, SW3 opens and SW1 and SW2 move to Position B (see Figure 26). The output impedances of the source driving the V must match; otherwise, the ...
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AD7323 – NOTES CAN AND V – CAN ...
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TYPICAL CONNECTION DIAGRAM Figure 32 shows a typical connection diagram for the AD7323. In this configuration, the AGND pin is connected to the analog ground plane of the system, and the DGND pin is connected to the digital ground plane ...
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AD7323 When a conversion takes place, the common mode is rejected, resulting in a noise-free signal of amplitude −2 × (4 × × (4 × corresponding to Digital Code −4096 to REF Digital Code +4095. ...
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RANGE ±2.5V 6 RANGE ±10V 4 RANGE 2 0 –2 ±10V RANGE – +10V –6 RANGE 2.5V REF –8 ±16. ±12V Figure 40. Pseudo Input ...
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AD7323 REGISTERS The AD7323 has three programmable registers: the control register, sequence register, and range register. These registers are write-only registers. ADDRESSING REGISTERS A serial transfer on the AD7323 consists of 16 SCLK cycles. The three MSBs on the DIN ...
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CONTROL REGISTER The control register is used to select the analog input channel, analog input configuration, reference, coding, and power mode. The control register is a write-only, 12-bit register. Data loaded on the DIN line corresponds to the AD7323 configuration ...
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AD7323 Table 11. Power Mode Selection PM1 PM0 Description 1 1 Full shutdown mode. In this mode, all internal circuitry on the AD7323 is powered down. Information in the control register is retained when the AD7323 is in full shutdown ...
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SEQUENCE REGISTER The sequence register on the AD7323 is a 4-bit, write-only register. Each of the four analog input channels has one corresponding bit in the sequence register. To select a channel for inclusion in the sequence, set the corresponding ...
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AD7323 SEQUENCER OPERATION The AD7323 can be configured to automatically cycle through a number of selected channels using the on-chip sequence register with the Seq1 bit and the Seq2 bit in the control register. Figure 44 shows how to program ...
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If a change to the range register is required during a sequence necessary to first stop the sequence by writing to the control register and setting Seq1 to 0 and Seq2 to 0. Next, the write to the ...
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AD7323 REFERENCE The AD7323 can operate with either the internal 2.5 V on-chip reference or an externally applied reference. The internal reference is selected by setting the Ref bit in the control register power-up, the Ref bit ...
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MODES OF OPERATION The AD7323 has several modes of operation that are designed to provide flexible power management options. These options can be chosen to optimize the power dissipation/throughput rate ratio for different application requirements. The mode of operation of ...
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AD7323 AUTOSHUTDOWN MODE (PM1 = 1, PM0 = 0) Once the autoshutdown mode is selected, the AD7323 auto- th matically enters shutdown on the 15 SCLK rising edge. In autoshutdown mode, all internal circuitry is powered down. The AD7323 retains ...
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POWER vs. THROUGHPUT RATE The power consumption of the AD7323 varies with throughput rate. The static power consumed by the AD7323 is very low, and significant power savings can be achieved as the throughput rate is reduced. Figure 49 and ...
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AD7323 SERIAL INTERFACE Figure 51 shows the timing diagram for the serial interface of the AD7323. The serial clock applied to the SCLK pin provides the conversion clock and controls the transfer of information to and from the AD7323 during ...
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MICROPROCESSOR INTERFACING The serial interface on the AD7323 allows the part to be directly connected to a range of different microprocessors. This section explains how to interface the AD7323 with some common microcontroller and DSP serial interface protocols. AD7323 TO ...
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AD7323 APPLICATION HINTS LAYOUT AND GROUNDING The printed circuit board that houses the AD7323 should be designed so that the analog and digital sections are confined to certain areas of the board. This design facilitates the use of ground planes ...
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... ORDERING GUIDE Model 1 Temperature Range AD7323BRUZ –40°C to +85°C AD7323BRUZ-REEL –40°C to +85°C AD7323BRUZ-REEL7 –40°C to +85°C EVAL-AD7323CBZ 2 3 EVAL-CONTROL BRD2Z RoHS Compliant Part. 2 This can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL board for evaluation/demonstration purposes. ...
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AD7323 NOTES ©2006–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05400-0-1/10(A) Rev Page ...