MX7705 datasheet(14/34 Pages) MAXIM

Part #	MX7705

Description	16-Bit, Low-Power, 2-Channel, Sigma-Delta ADC

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Manufacturer	MAXIM [Maxim Integrated Products]

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16-Bit, Low-Power, 2-Channel,

Sigma-Delta ADC

14

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SUPPLY CURRENT vs. fCLKIN (3V)

fCLKIN (MHz)

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

2.6

0.3

0.4

0.5

0.6

0.2

A

A: BUFFERED MODE

CLK = 1,

GAIN = 128

B: BUFFERED MODE

CLK = 1,

GAIN = 1

E: UNBUFFERED MODE

CLK = 0,

GAIN = 1, 128

C: BUFFERED MODE

CLK = 0,

GAIN = 1, 128

D: UNBUFFERED MODE

CLK = 1,

GAIN = 1, 128

B

E

D

C

VDD = 3V

SUPPLY CURRENT vs. fCLKIN (5V)

fCLKIN (MHz)

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

2.6

0.35

0.45

0.55

0.65

0.25

A

A: BUFFERED MODE

CLK = 1,

GAIN = 128

B: BUFFERED MODE

CLK = 1,

GAIN = 1

E: UNBUFFERED MODE

CLK = 0,

GAIN = 1, 128

C: BUFFERED MODE

CLK = 0,

GAIN = 1, 128

D: UNBUFFERED MODE

CLK = 1,

GAIN = 1, 128

B

E

D

C

VDD = 5V

GAIN

64

32

16

8

4

2

1

128

SUPPLY CURRENT vs. GAIN (3V)

0.3

0.4

0.5

0.6

0.2

A

A: BUFFERED MODE

CLK = 1, CLKDIV = 1,

fCLKIN = 2.4576MHz

B: BUFFERED MODE

CLK = 1, CLKDIV = 0,

fCLKIN = 2.4576MHz

E: UNBUFFERED MODE

CLK = 1, CLKDIV = 0,

fCLKIN = 2.4576MHz

F: UNBUFFERED MODE

CLK = 0, CLKDIV = 0,

fCLKIN = 1MHz

C: BUFFERED MODE

CLK = 0, CLKDIV = 0,

fCLKIN = 1MHz

D: UNBUFFERED MODE

CLK = 1, CLKDIV = 1,

fCLKIN = 2.4576MHz

B

E

F

D

C

VDD = 3V

GAIN

64

32

16

8

4

2

1

128

SUPPLY CURRENT vs. GAIN (5V)

VDD = 5V

0.35

0.45

0.55

0.65

0.25

A: BUFFERED MODE

CLK = 1, CLKDIV = 0,

fCLKIN = 2.4576MHz

B: BUFFERED MODE

CLK = 1, CLKDIV = 1,

fCLKIN = 2.4576MHz

E: UNBUFFERED MODE

CLK = 1, CLKDIV = 0,

fCLKIN = 2.4576MHz

F: UNBUFFERED MODE

CLK = 0, CLKDIV = 0,

fCLKIN = 1MHz

C: BUFFERED MODE

CLK = 0, CLKDIV = 0,

fCLKIN = 1MHz

D: UNBUFFERED MODE

CLK = 1, CLKDIV = 1,

fCLKIN = 2.4576MHz

B

E

F

D

C

A

Typical Operating Characteristics (continued)

(VDD = 3V or 5V, VREF+ = 1.225V for VDD = 3V, VREF+ = 2.5V for VDD = 5V, VREF- = GND, TA = +25°C, unless otherwise noted.)

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