Datasheet AD7680 (Analog Devices) - 9

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AD7680 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS SOT-23 MSOP V 6 CS DD 1 VDD 1 8 CS AD7680 GND AD7680 2 5 SDATA GND 2 7 SDATA TOP VIEW TOP VIEW V 4 SCLK IN 3 (Not to Scale) GND 3 6 NC (Not to Scale)
03643-0-003
VIN 4 5 SCLK
Figure 3. SOT-23 Pin Configuration
NC = NO CONNECT
03643-0-022 Figure 4. MSOP Pin Configuration
Table 6. Pin Function Descriptions Pin No. Pin No. SOT-23 MSOP Mnemonic Function
1 1 VDD Power Supply Input. The VDD range for the AD7680 is from 2.5 V to 5.5 V. 2 2, 3 GND Analog Ground. Ground reference point for all circuitry on the AD7680. All analog input signals should be referred to this GND voltage. 3 4 VIN Analog Input. Single-ended analog input channel. The input range is 0 V to VDD. 4 5 SCLK Serial Clock. Logic input. SCLK provides the serial clock for accessing data from this part. This clock input is also used as the clock source for the AD7680's conversion process. 5 7 SDATA Data Out. Logic output. The conversion result from the AD7680 is provided on this output as a serial data stream. The bits are clocked out on the falling edge of the SCLK input. The data stream from the AD7680 consists of four leading zeros followed by 16 bits of conversion data that are provided MSB first. This will be followed by four trailing zeroes if CS is held low for a total of 24 SCLK cycles. See the sec Serial Interface tion. 6 8 CS Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the AD7680 and framing the serial data transfer. N/A 6 NC No Connect. This pin should be left unconnected. Rev. A | Page 8 of 24 Document Outline SPECIFICATIONS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION ANALOG INPUT ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM Digital Inputs MODES OF OPERATION NORMAL MODE POWER-DOWN MODE POWER VS. THROUGHPUT RATE SERIAL INTERFACE AD7680 TO ADSP-218x APPLICATION HINTS GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE