EVAL-AD7612CBZ Analog Devices Inc, EVAL-AD7612CBZ Datasheet
EVAL-AD7612CBZ
Specifications of EVAL-AD7612CBZ
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EVAL-AD7612CBZ Summary of contents
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FEATURES Multiple pins/software programmable input ranges ±5 V, ±10 V Pins or serial SPI®-compatible input ranges/mode selection Throughput 750 kSPS (warp mode) 600 kSPS (normal mode) 500 kSPS (impulse mode) INL: ±0.75 LSB typical, ±1.5 LSB ...
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... Driver Amplifier Choice ........................................................... 21 Voltage Reference Input/Output .............................................. 21 Power Supplies ............................................................................ 22 Conversion Control ................................................................... 23 Interfaces.......................................................................................... 24 Digital Interface.......................................................................... 24 Parallel Interface......................................................................... 24 Serial Interface ............................................................................ 25 Master Serial Interface............................................................... 25 Slave Serial Interface .................................................................. 27 Hardware Configuration ........................................................... 29 Software Configuration ............................................................. 29 Microprocessor Interfacing....................................................... 30 Application Information................................................................ 31 Layout Guidelines....................................................................... 31 Evaluating Performance ............................................................ 31 Outline Dimensions ....................................................................... 32 Ordering Guide .......................................................................... 32 Rev Page ...
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SPECIFICATIONS AVDD = DVDD = 5 V; OVDD = 2 5.5 V; VCC = 15 V; VEE = − Table 2. Parameter RESOLUTION ANALOG INPUT Voltage Range Analog Input CMRR Input Current Input Impedance ...
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AD7612 Parameter REFERENCE BUFFER REFBUFIN Input Voltage Range EXTERNAL REFERENCE Voltage Range Current Drain TEMPERATURE PIN Voltage Output Temperature Sensitivity Output Resistance DIGITAL INPUTS Logic Levels DIGITAL OUTPUTS Data Format 6 Pipeline ...
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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 33 and Figure 34) Convert Pulse Width Time ...
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AD7612 Parameter SLAVE SERIAL/SERIAL CONFIGURATION INTERFACE MODES Figure 43, and Figure 45) 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 SDCLK/SCCLK Low 1 ...
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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 AGND − 0.3 V REFGND to AGND ...
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AD7612 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS D2/DIVSCLK[0] D3/DIVSCLK[1] Table 6. Pin Function Descriptions Pin No. Mnemonic Type 1 Description AGND P Analog Power Ground Pins. Ground reference point for all analog I/O. All analog I/O should be ...
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Pin No. Mnemonic Type Description DI/O In parallel mode, this output is used as Bit 4 of the parallel port data output bus. EXT/INT Serial Data Clock Source Select. In serial mode, this input is used ...
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AD7612 1 Pin No. Mnemonic Type Description 24 D11 parallel mode, this output is used as Bit 11 of the parallel port data output bus. RDERROR Serial Data Read Error. In serial slave mode (SER/PAR = high, ...
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Pin No. Mnemonic Type Description 43 IN+ AI Analog Input. Referenced to IN−. 45 TEMP AO Temperature Sensor Analog Output. 46 REFBUFIN AI Reference Buffer Input. When using an external reference with the internal reference buffer (PDBUF = low, ...
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AD7612 TYPICAL PERFORMANCE CHARACTERISTICS AVDD = DVDD = 5 V; OVDD = 5 V; VCC = 15 V; VEE = − 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 0 16384 32768 CODE Figure 5. Integral Nonlinearity vs. Code ...
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FREQUENCY (kHz) Figure 11. FFT 20 kHz 96 SNR 94 SINAD 92 90 ENOB FREQUENCY (kHz) Figure 12. SNR, SINAD, ...
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AD7612 –96 –98 –100 –102 –104 –106 –108 –110 –112 –114 –116 –118 –120 –55 –35 – TEMPERATURE (°C) Figure 17. THD vs. Temperature POSITIVE FULL SCALE ERROR 2 ZERO 1 ERROR 0 NEGATIVE ...
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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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AD7612 TERMINOLOGY Least Significant Bit (LSB) The least significant bit, or LSB, is the smallest increment that can be represented by a converter. For an analog-to-digital con- verter with N bits of resolution, the LSB expressed in volts is V ...
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THEORY OF OPERATION IN+ REF REFGND 32,768C IN– OVERVIEW The AD7612 is a very fast, low power, precise, 16-bit analog-to- digital converter (ADC) using successive approximation capacitive digital-to-analog (CDAC) architecture. The AD7612 can be configured at any time for one ...
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AD7612 MODES OF OPERATION The AD7612 features three modes of operation: warp, normal, and impulse. Each of these modes is more suitable to specific applications. The mode is configured with the input pins, WARP and IMPULSE, or via the configuration ...
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TYPICAL CONNECTION DIAGRAM Figure 27 shows a typical connection diagram for the AD7612 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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AD7612 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 Volt range) inputs. See Table 6 for pin details and the Hardware Configuration section ...
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DRIVER AMPLIFIER CHOICE Although the AD7612 is easy to drive, the driver amplifier must meet the following requirements: • For multichannel, multiplexed applications, the driver amplifier and the AD7612 analog input circuit must be able to settle for a full-scale ...
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AD7612 Internal Reference (REF = 5 V) (PDREF = Low, PDBUF = Low) To use the internal reference, the PDREF and PDBUF inputs must be low. This enables the on-chip band gap reference, buffer, and TEMP sensor resulting in a ...
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Power Sequencing The AD7612 is independent of power supply sequencing and is very insensitive to power supply variations on AVDD over a wide frequency range as shown in Figure 31. 80 EXT REF 75 INT REF ...
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AD7612 INTERFACES DIGITAL INTERFACE The AD7612 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 AD7612 ...
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Interface (Master or Slave) The BYTESWAP pin allows a glueless interface to an 8-bit bus. As shown in Figure 38, when BYTESWAP is low, the LSB byte is output on D[7:0] and the MSB is output on D[15:8]. When ...
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AD7612 CS CNVST BUSY t 29 SYNC t 14 SDCLK t 15 SDOUT t 16 CS, RD CNVST BUSY t 17 SYNC SDCLK t 18 SDOUT Figure 40. ...
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SLAVE SERIAL INTERFACE The pins multiplexed on D[11:4] used for slave serial interface are: EXT/ INT , INVSCLK, SDIN, SDOUT, SDCLK and RDERROR. External Clock (SER/ PAR = High, EXT/ INT = High) Setting the EXT/ INT = high allows ...
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AD7612 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 has been initiated. This method allows the full throughput and the ...
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HARDWARE CONFIGURATION The AD7612 can be configured at any time with the dedicated hardware pins WARP, IMPULSE, BIPOLAR, TEN, OB and PD for parallel mode (SER/ PAR = low) or serial hardware mode (SER/ PAR = high, HW/ ...
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AD7612 WARP = BIP = TEN = IMPULSE = CNVST BUSY t 31 SCCS t 31 SCCLK SCIN X START BIPOLAR t 33 MICROPROCESSOR ...
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... To minimize parasitic inductances, place the decoupling capacitor close to the ADC and connect it with short, thick traces. EVALUATING PERFORMANCE A recommended layout for the AD7612 is outlined in the EVAL- AD7612CB evaluation board documentation. The evaluation board package includes a fully assembled and tested evaluation board, documentation, and software for controlling the board from a PC via the EVAL-CONTROL BRD3 ...
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... This board can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRD3 for evaluation/demonstration purposes. 3 This board allows control and communicate with all Analog Devices. evaluation boards ending with the CB designators. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...