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AD7607 Fiches technique(PDF) 11 Page - Analog Devices |
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AD7607 Fiches technique(HTML) 11 Page - Analog Devices |
11 / 32 page Data Sheet AD7607 Rev. B | Page 11 of 32 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS AD7607 TOP VIEW (Not to Scale) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 PIN 1 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 AGND AVCC 1 3 4 FRSTDATA 7 6 5 OS 2 2 8 9 10 12 13 14 15 16 11 DB0 BUSY CONVST B CONVST A RANGE RESET RD/SCLK CS PAR/SER/BYTE SEL OS 1 OS 0 STBY DECOUPLING CAP PIN DATA OUTPUT POWER SUPPLY ANALOG INPUT GROUND PIN DIGITAL OUTPUT DIGITAL INPUT REFERENCE INPUT/OUTPUT DB15/BYTE SEL REFIN/REFOUT 48 46 45 42 43 44 47 41 40 39 37 36 35 34 33 38 AGND AVCC REFGND REFCAPA AGND AGND AGND REFCAPB REFGND REGCAP REGCAP AVCC AVCC REF SELECT Figure 8. Pin Configuration Table 6. Pin Function Descriptions Pin No. Type1 Mnemonic Description 1, 37, 38, 48 P AVCC Analog Supply Voltage, 4.75 V to 5.25 V. This supply voltage is applied to the internal front-end amplifiers and to the ADC core. These supply pins should be decoupled to AGND. 2, 26, 35, 40, 41, 47 P AGND Analog Ground. These pins are the ground reference points for all analog circuitry on the AD7607. All analog input signals and external reference signals should be referred to these pins. All six of these AGND pins should connect to the AGND plane of a system. 5, 4, 3 DI OS[2:0] Oversampling Mode Pins. Logic inputs. These inputs are used to select the oversampling ratio. OS 2 is the MSB control bit, and OS 0 is the LSB control bit. See the Digital Filter section for more details about the oversampling mode of operation and Table 9 for oversampling bit decoding. 6 DI PAR/SER/ BYTE SEL Parallel/Serial/Byte Interface Selection Input. Logic input. If this pin is tied to a logic low, the parallel interface is selected. If this pin is tied to a logic high, the serial interface is selected. Parallel byte interface mode is selected when this pin is logic high and DB15/BYTE SEL is logic high (see Table 8). In serial mode, the RD/SCLK pin functions as the serial clock input. The DB7/DOUTA pin and the DB8/DOUTB pin function as serial data outputs. When the serial interface is selected, the DB[15:9] and DB[6:0] pins should be tied to ground. In byte mode, DB15, in conjunction with PAR/SER/BYTE SEL, is used to select the parallel byte mode of operation (see Table 8). DB14 is used as the HBEN pin. DB[7:0] transfer the 16-bit conversion results in two RD operations, with DB0 as the LSB of the data transfers. 7 DI STBY Standby Mode Input. This pin is used to place the AD7607 into one of two power-down modes: standby mode or shutdown mode. The power-down mode entered depends on the state of the RANGE pin, as shown in Table 7. When in standby mode, all circuitry, except the on-chip reference, regulators, and regulator buffers, is powered down. When in shutdown mode, all circuitry is powered down. 8 DI RANGE Analog Input Range Selection. Logic input. The polarity on this pin determines the input range of the analog input channels. If this pin is tied to a logic high, the analog input range is ±10 V for all channels. If this pin is tied to a logic low, the analog input range is ±5 V for all channels. A logic change on this pin has an immediate effect on the analog input range. Changing this pin during a conversion is not recommended. See the Analog Input section for more information. |
Numéro de pièce similaire - AD7607 |
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Description similaire - AD7607 |
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