AD7705BN datasheet(14/44 Pages) AD

14 / 44 page

AD7705/AD7706

Rev. C | Page 14 of 44

TYPICAL PERFORMANCE CHARACTERISTICS

READING NUMBER

32763

100

32764

32765

32766

32767

32768

32769

32770

32771

200

300

400

500

600

700

800

900

1000

VDD = 5V

VREF = 2.5V

GAIN = +128

50Hz UPDATE RATE

TA = 25°C

RMS NOISE = 600nV

Figure 5. Noise @ Gain = +128 With 50 Hz Update Rate

FREQUENCY (MHz)

0.4

VDD = 3V

TA = 25°C

1.2

1.0

0.8

0.6

0.4

0.2

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

BUFFERED MODE, GAIN = +128

UNBUFFERED MODE, GAIN = +1

UNBUFFERED MODE, GAIN = +128

BUFFERED MODE, GAIN = +1

Figure 6. IDD vs. MCLK IN Frequency @ 3 V

GAIN

1.0

0.8

0.6

0.4

0.2

0.1

0.3

0.5

0.7

0.9

128

BUFFERED MODE

fCLK = 5MHz,

CLKDIV = 1

UNBUFFERED MODE

fCLK = 1MHz,

CLKDIV = 0

VDD = 3V

EXTERNAL MCLK

CLKDIS = 1

TA = 25°C

BUFFERED MODE

fCLK = 2.4576MHz, CLKDIV = 0

UNBUFFERED MODE

fCLK = 5MHz, CLKDIV = 1

UNBUFFERED MODE

fCLK = 2.84MHz, CLKDIV = 0

BUFFERED MODE

fCLK = 1MHz, CLKDIV = 0

Figure 7. IDD vs. Gain and Clock Frequency @ 3 V

CODE

32764

400

32765

32766

32767

32768

32769

32770

300

200

100

Figure 8. Histogram of Data in Figure 5

FREQUENCY (MHz)

0.4

VDD = 5V

TA = +25°C

1.2

1.0

0.8

0.6

0.4

0.2

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

BUFFERED MODE, GAIN = +128

UNBUFFERED MODE, GAIN = +1

UNBUFFERED MODE, GAIN = +128

BUFFERED MODE, GAIN = +1

Figure 9. IDD vs. MCLK IN Frequency @ 5 V

GAIN

VDD = 5V

EXTERNAL MCLK

CLKDIS = 1

TA = 25°C

1.2

0.8

0.6

0.4

0.2

1.0

128

BUFFERED MODE

fCLK = 5MHz,

CLKDIV = 1

BUFFERED MODE

fCLK = 1MHz, CLKDIV = 0

BUFFERED MODE

fCLK = 2.4576MHz, CLKDIV = 0

UNBUFFERED MODE

fCLK = 2.4576MHz, CLKDIV = 0

UNBUFFERED MODE

fCLK = 1MHz,

CLKDIV = 0

UNBUFFERED MODE

fCLK = 5MHz, CLKDIV = 1

Figure 10. IDD vs. Gain and Clock Frequency @ 5 V

AD7705BN Datasheet(PDF) 14 Page - Analog Devices

AD7705BN Datasheet(HTML) 14 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL