AD7265BSUZ Analog Devices Inc, AD7265BSUZ Datasheet
AD7265BSUZ
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AD7265BSUZ Summary of contents
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FEATURES Dual 12-bit, 3-channel ADC Throughput rate: 1 MSPS Specified for Power consumption MSPS with 3 V supplies MSPS with 5 V supplies Pin-configurable ...
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AD7265 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configurations and ...
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SPECIFICATIONS 2 5. MIN MAX DD reference or external reference = 2.5 V ± 1%, unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE 2 Signal-to-Noise Ratio (SNR) ...
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AD7265 Parameter DC Leakage Current Input Capacitance REFERENCE INPUT/OUTPUT 8 Reference Output Voltage Long-Term Stability 2 Output Voltage Hysteresis Reference Input Voltage Range DC Leakage Current Input Capacitance Output Impedance CAP CAP Reference Temperature Coefficient V ...
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TIMING SPECIFICATIONS 5.25 V, internal/external reference = 2 DRIVE Table 2. Parameter Limit MIN MAX ...
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AD7265 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to AGND DGND DGND DRIVE V to AGND DRIVE AGND to DGND Analog Input Voltage to AGND Digital Input Voltage to ...
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PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS DGND 1 PIN 1 REF SELECT 2 INDICATOR CAP AD7265 AGND 5 TOP VIEW AGND 6 (Not to Scale Figure 2. 32-Lead CP-32-2 ...
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AD7265 Pin No. Mnemonic Description 28 Serial Data Outputs. The data output is supplied to each pin as a serial data stream. The bits are clocked out on OUT OUT the falling edge of the ...
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TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. A –60 INTERNAL REFERENCE –70 –80 EXTERNAL REFERENCE –90 –100 –110 100mV p-p SINE WAVE DECOUPLING SINGLE-ENDED MODE –120 0 200 400 600 800 1000 1200 1400 ...
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AD7265 1.0 V DIFFERENTIAL MODE 0.8 POSITIVE DNL 0.6 0.4 POSITIVE INL 0.2 0 –0.2 NEGATIVE INL –0.4 –0.6 NEGATIVE DNL –0.8 –1.0 0 0.5 1.0 1.5 V (V) REF Figure 10. Linearity Error vs. V 12.0 11.5 11.0 V ...
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TERMINOLOGY Differential Nonlinearity (DNL) Differential nonlinearity is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Integral Nonlinearity (INL) Integral nonlinearity is the maximum deviation from a straight line passing ...
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AD7265 The AD7265 is tested using the CCIF standard where two input frequencies near the top end of the input bandwidth are used. In this case, the second-order terms are usually distanced in frequency from the original sine waves, while ...
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THEORY OF OPERATION CIRCUIT INFORMATION The AD7265 is a fast, micropower, dual, 12-bit, single-supply, ADC that operates from a 2 5.25 V supply. When operated from either supply, the AD7265 ...
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AD7265 IN IN– Figure 18. Equivalent Analog Input Circuit, Conversion Phase—Switches Open, Track Phase—Switches Closed When no amplifier is used to drive the analog ...
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Differential Mode The AD7265 can have a total of six differential analog input pairs. Differential signals have some benefits over single-ended signals, including noise immunity based on the device’s common-mode rejection and improvements in distortion performance. Figure 23 defines the ...
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AD7265 Using an Op Amp Pair An op amp pair can be used to directly couple a differential signal to one of the analog input pairs of the AD7265. The circuit configurations illustrated in Figure 26 and Figure 27 show ...
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ANALOG INPUT SELECTION The analog inputs of the AD7265 can be configured as single- ended or true differential via the SGL/ DIFF logic pin, as shown in Figure 31. If this pin is tied to a logic low, the analog ...
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AD7265 TRANSFER FUNCTIONS The designed code transitions occur at successive integer LSB values (1 LSB, 2 LSB, and so on). In single-ended mode, the LSB size is V /4096 when the range is used, and the ...
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MODES OF OPERATION The mode of operation of the AD7265 is selected by controlling the (logic) state of the CS signal during a conversion. There are three possible modes of operation: normal mode, partial power- down mode, and full power-down ...
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AD7265 To exit this mode of operation and power up the AD7265 again, a dummy conversion is performed. On the falling edge the device begins to power up and continues to power up as long as CS ...
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THE PART BEGINS TO POWER UP SCLK D A OUT D B OUT POWER-UP TIMES As described in detail, the AD7265 has two power-down modes, partial power-down and full power-down. This section deals with the power-up time required ...
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AD7265 SERIAL INTERFACE Figure 41 shows the detailed timing diagram for serial inter- facing to the AD7265. The serial clock provides the conversion clock and controls the transfer of information from the AD7265 during conversion. CS The signal initiates the ...
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MICROPROCESSOR INTERFACING The serial interface on the AD7265 allows the part to be directly connected to a range of many different microprocessors. This section explains how to interface the AD7265 with some of the more common microcontroller and DSP serial ...
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AD7265 AD7265 to ADSP-BF53x The ADSP-BF53x family of DSPs interface directly to the AD7265 without any glue logic required. The availability of secondary receive registers on the serial ports of the Blackfin® DSPs means only one serial port is necessary ...
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AD7265 TO DSP563xx The connection diagram in Figure 46 shows how the AD7265 can be connected to the ESSI (synchronous serial interface) of the DSP563xx family of DSPs from Motorola. There are two on-board ESSIs, and each operates in synchronous ...
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AD7265 APPLICATION HINTS GROUNDING AND LAYOUT The analog and digital supplies to the AD7265 are independent and separately pinned out to minimize coupling between the analog and digital sections of the device. The printed circuit board (PCB) that houses the ...
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... AD7265BCPZ-REEL 1 –40°C to +125°C 1 AD7265BSUZ –40°C to +125°C 1 AD7265BSUZ-REEL7 –40°C to +125°C 1 AD7265BSUZ-REEL –40°C to +125°C 2 EVAL-AD7265CB 3 EVAL-CONTROL BRD2 Pb-free 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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AD7265 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04674-0-11/06(A) T Rev Page ...