AD7327 datasheet(31/36 Pages) AD

31 / 36 page

AD7327

Rev. 0 | Page 31 of 36

POWER VS. THROUGHPUT RATE

The power consumption of the AD7327 varies with throughput

rate. The static power consumed by the AD7327 is very low, and

significant power savings can be achieved as the throughput

rate is reduced. Figure 51 and Figure 52 shows the power vs.

throughput rate for the AD7327 at a VCC of 3 V and 5 V,

respectively. Both plots clearly show that the average power

consumed by the AD7327 is greatly reduced as the sample

frequency is reduced. This is true whether a fixed SCLK value is

used or if it is scaled with the sampling frequency. Figure 51 and

Figure 52 show the power consumption when operating in

normal mode for a variable SCLK that scales with the sampling

frequency.

THROUGHPUT RATE (kSPS)

100

200

300

400

500

VARIABLE SCLK

VCC =3V

VDD/VSS = ±12V

TA =25°C

INTERNAL REFERENCE

Figure 51. Power vs. Throughput Rate with 3 V VCC

THROUGHPUT RATE (kSPS)

100

200

300

400

500

VARIABLE SCLK

VCC =5V

VDD/VSS = ±12V

TA =25°C

INTERNAL REFERENCE

Figure 52. Power vs. Throughput Rate with 5 V VCC

AD7327 Datasheet(PDF) 31 Page - Analog Devices