AD7277 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD7277 Datasheet PDF : 28 Pages
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AD7276/AD7277/AD7278
Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
VDD 1 AD7276/ 6 CS
AD7277/
GND 2 AD7278 5 SDATA
TOP VIEW
VIN 3 (Not to Scale) 4 SCLK
Figure 8. 6-Lead TSOT Pin Configuration
Table 7. Pin Function Descriptions
Pin No.
6-Lead TSOT 8-Lead MSOP Mnemonic
1
1
VDD
2
7
GND
3
8
VIN
4
6
SCLK
5
2
SDATA
6
3
CS
4, 5
NC
VDD 1
SDATA 2
CS 3
NC 4
AD7276/
AD7277/
AD7278
TOP VIEW
(Not to Scale)
8 VIN
7 GND
6 SCLK
5 NC
NC = NO CONNECT
Figure 9. 8-Lead MSOP Pin Configuration
Description
Power Supply Input. The VDD range for the AD7276/AD7277/AD7278 is 2.35 V to 3.6 V.
Analog Ground. Ground reference point for all circuitry on the
AD7276/AD7277/AD7278. All analog input signals should be referred to this GND
voltage.
Analog Input. Single-ended analog input channel. The input range is 0 V to VDD.
Serial Clock. Logic input. SCLK provides the serial clock for accessing data from the
part. This clock input is also used as the clock source for the conversion process of the
AD7276/AD7277/AD7278.
Data Out. Logic output. The conversion result from the AD7276/AD7277/AD7278 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 AD7276 consists of two leading
zeros followed by 12 bits of conversion data and two trailing zeros, provided MSB first.
The data stream from the AD7277 consists of two leading zeros followed by 10 bits of
conversion data and four trailing zeros, provided MSB first. The data stream from the
AD7278 consists of two leading zeros followed by 8 bits of conversion data and six
trailing zeros, provided MSB first.
Chip Select. Active low logic input. This input provides the dual function of initiating
conversion on the AD7276/AD7277/AD7278 and framing the serial data transfer.
No Connect.
Rev. E | Page 12 of 28
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