AD7634BCPZRL Analog Devices Inc, AD7634BCPZRL Datasheet
AD7634BCPZRL
Specifications of AD7634BCPZRL
Related parts for AD7634BCPZRL
AD7634BCPZRL Summary of contents
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FEATURES Multiple pins/software-programmable input ranges 5 V (10 V p-p), +10 V (20 V p-p), ±5 V (20 V p-p), ±10 V (40 V p-p) Pins or serial SPI®-compatible input ranges/mode selection Throughput 670 kSPS (warp mode) 570 kSPS (normal ...
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AD7634 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. ...
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SPECIFICATIONS AVDD = DVDD = 5 V; OVDD = 2 5.5 V; VCC = 15 V; VEE = − Table 2. Parameter RESOLUTION ANALOG INPUTS Differential Voltage Range ...
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AD7634 Parameter INTERNAL REFERENCE Output Voltage Temperature Drift Line Regulation Long-Term Drift Turn-On Settling Time REFERENCE BUFFER REFBUFIN Input Voltage Range EXTERNAL REFERENCE Voltage Range Current Drain TEMPERATURE PIN Voltage Output Temperature Sensitivity Output Resistance DIGITAL INPUTS Logic Levels V ...
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TIMING SPECIFICATIONS AVDD = DVDD = 5 V; OVDD = 2 5.5 V; VCC = 15 V; VEE = − Table 3. Parameter CONVERSION AND RESET (See Figure 35 and Figure 36) Convert Pulse Width Time ...
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AD7634 Parameter SLAVE SERIAL/SERIAL CONFIGURATION INTERFACE MODES (See Figure 44, Figure 45, and Figure 47) External SDCLK, SCCLK Setup Time External SDCLK Active Edge to SDOUT Delay SDIN/SCIN Setup Time SDIN/SCIN Hold Time External SDCLK/SCCLK Period External SDCLK/SCCLK High External ...
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ABSOLUTE MAXIMUM RATINGS Table 5. Parameter Rating Analog Inputs/Outputs 1 1 IN+ , IN− to AGND VEE − 0 VCC + 0.3 V REF, REFBUFIN, TEMP, AVDD + 0 REFGND to AGND AGND − 0.3 V ...
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AD7634 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS D4/DIVSCLK[0] D5/DIVSCLK[1] NOTES 1. FOR THE LEAD FRAME CHIP SCALE PACKAGE (LFCSP), THE EXPOSED PAD SHOULD BE CONNECTED TO VEE. THIS CONNECTION IS NOT REQUIRED TO MEET THE ELECTRICAL PERFORMANCES. Table 6. Pin Function ...
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Pin No. Mnemonic Type Description 8 D1/A0 DI/O When MODE[1: this pin is Bit 1 of the parallel port data output bus. In all other modes, this input pin controls the form in which data is output ...
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AD7634 1 Pin No. Mnemonic Type Description 22 D11 or DI/O When MODE[1: this output is used as Bit 11 of the parallel port data output bus. SDCLK When MODE[1: Serial Data Clock. ...
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Pin No. Mnemonic Type Description 2 36 BIPOLAR DI Input Range Select. See description for Pin 30. 37 REF AO/I Reference Input/Output. When PDREF/PDBUF = low, the internal reference and buffer are enabled, produc- ing this ...
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AD7634 TYPICAL PERFORMANCE CHARACTERISTICS AVDD = DVDD = 5 V; OVDD = 5 V; VCC = 15 V; VEE = − 2.5 POSITIVE INL = 1.40LSB NEGATIVE INL = –1.10LSB 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 ...
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FREQUENCY (kHz) Figure 11. FFT 20 kHz, Bipolar 5 V Range, Internal Reference 100 98 SNR 96 94 ENOB SINAD ...
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AD7634 –100 –104 –108 ±5V –112 ±10V –116 –120 0V TO 10V –124 –128 –55 –35 – TEMPERATURE (°C) Figure 17. THD vs. Temperature 20 16 ZERO/OFFSET ERROR –4 –8 NEGATIVE FULL-SCALE ERROR ...
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PD = PDBUF = PDREF = HIGH 600 500 400 VEE, –15V VCC, +15V DVDD 300 OVDD AVDD 200 100 0 –55 –35 – TEMPERATURE (°C) Figure 23. Power-Down Operating Currents vs. Temperature 50 45 ...
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AD7634 TERMINOLOGY Least Significant Bit (LSB) The least significant bit, or LSB, is the smallest increment that can be represented by a converter. For a fully differential input ADC with N bits of resolution, the LSB expressed in volts is ...
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THEORY OF OPERATION IN+ MSB 131,072C REF REFGND 131,072C 65,536C MSB IN– OVERVIEW The AD7634 is a very fast, low power, precise, 18-bit ADC using successive approximation capacitive digital-to-analog (CDAC) architecture. The AD7634 can be configured at any time for ...
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AD7634 Warp Mode Setting WARP = high and IMPULSE = low allows the fastest conversion rate 670 kSPS. However, in this mode, the full-specified accuracy is guaranteed only when the time between conversions does not exceed 1 ...
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TYPICAL CONNECTION DIAGRAM Figure 27 shows a typical connection diagram for the AD7634 using the internal reference, serial data interface, and serial configuration port. Different circuitry from that shown in Figure 27 is optional and is discussed in the following ...
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AD7634 ANALOG INPUTS Input Range Selection In parallel mode and serial hardware mode, the input range is selected by using the BIPOLAR (bipolar) and TEN (10 V range) inputs. See Table 6 for pin details; see the Hardware Configuration section ...
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DRIVER AMPLIFIER CHOICE Although the AD7634 is easy to drive, the driver amplifier must meet the following requirements: • For multichannel, multiplexed applications, the driver ampli- fier and the AD7634 analog input circuit must be able to settle for a ...
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AD7634 This circuit can also be made discretely, and thus more flexible, using any of the recommended low noise amplifiers in Table 9. Again, to preserve the SNR of the converter, the resistors, R and R , should be kept ...
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Digital Output Supply The OVDD supplies the digital outputs and allows direct interface with any logic working between 2.3 V and 5.25 V. OVDD should be set to the same level as the system interface. Sufficient decoup- ling is required ...
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AD7634 INTERFACES DIGITAL INTERFACE The AD7634 has a versatile digital interface that can be set up as either a serial or a parallel interface with the host system. The serial interface is multiplexed on the parallel data bus. The AD7634 ...
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Interface (Master or Slave) The 18-bit interface is selected by setting MODE[1: this mode, the data output is straight binary. 16-Bit and 8-Bit Interface (Master or Slave) In the 16-bit (MODE[1: and 8-bit (MODE[1:0] ...
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AD7634 CS, RD CNVST BUSY t 17 SYNC SDCLK t 18 SDOUT Figure 41. Master Serial Data Timing for Reading (Read Previous Conversion During Convert) CS CNVST BUSY ...
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SLAVE SERIAL INTERFACE The pins multiplexed on D[13:6] used for slave serial inter- face are: EXT/ INT , INVSCLK, SDIN, SDOUT, SDCLK, and RDERROR. External Clock (MODE[1: EXT/ INT = High) Setting the EXT/ INT = high allows ...
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AD7634 External Clock Data Read After/During Conversion It is also possible to begin to read data after conversion and continue to read the last bits after a new conversion is initiated. This method allows the full throughput and the use ...
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HARDWARE CONFIGURATION The AD7634 can be configured at any time with the dedicated hardware pins WARP, IMPULSE, BIPOLAR, TEN, D0/OB and PD for parallel mode (MODE[1: serial hardware mode (MODE[1: ...
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AD7634 WARP = BIPOLAR = IMPULSE = TEN = CNVST BUSY t 31 SCCS t 31 SCCLK SCIN X START BIPOLAR t 33 MICROPROCESSOR ...
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APPLICATION INFORMATION LAYOUT GUIDELINES While the AD7634 has very good immunity to noise on the power supplies, exercise care with the grounding layout. To facili- tate the use of ground planes that can be easily separated, design the printed circuit ...
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... MAX 0.85 0.80 SEATING PLANE ORDERING GUIDE 1 Model Notes Temperature Range AD7634BCPZ −40°C to +85°C AD7634BCPZRL −40°C to +85°C AD7634BSTZ −40°C to +85°C AD7634BSTZRL −40°C to +85°C 2 EVAL-AD7634CBZ 3 EVAL-CONTROL BRD3 RoHS Compliant Part. 2 This board can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRD3 for evaluation/demonstration purposes. ...