AD7729AR datasheet(3/16 Pages) AD

部件名	AD7729AR

功能描述	Dual Sigma-Delta ADC with Auxiliary DAC

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制造商	AD [Analog Devices]

网页	http://www.analog.com

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–3–

REV. 0

AD7729

Parameter

AD7729A

Units

Test Conditions/Comments

LOGIC INPUTS

VINH, Input High Voltage

VDD – 0.8

V min

VINL, Input Low Voltage

0.8

V max

IIH, Input Current

10

µA max

CIN, Input Capacitance

10

pF max

LOGIC OUTPUTS

VOH, Output High Voltage

VDD – 0.4

V min

|IOUT| < 100 µA

VOL, Output Low Voltage

0.4

V max

|IOUT| < 100 µA

IOZL, Low Level Output Three-State Leakage Current

10

µA max

IOZH, High Level Output Three-State Leakage Current

10

µA max

POWER SUPPLIES

AVDD1, AVDD2

2.7/3.3

V min/max

DVDD1, DVDD2

2.7/3.3

V min/max

IDD

See Table I

NOTES

1Operating Temperature Range: –40

°C to +105°C. Therefore, T

MIN = – 40°C and TMAX = +105°C.

2During power-down, the AUXDAC has an output resistance of 30 k

Ω approximately to AGND.

Specifications subject to change without notice.

Table I. Current Summary (AVDD1 = AVDD2 = DVDD1 = DVDD2 = +3.3 V, RxPOWER1 = 0, RxPOWER0 = 1)

Internal

External

Analog

Digital

Interface Total

Current Current

Current

MCLK

Conditions

(typ)

(max)

BSE

ASE

ON

Comments

ADCs On Only

4.2

3.4

4

13.5

1

0

YES

REFOUT Enabled, BSCLK = MCLK

AUXDAC On Only

2

0.86

0.1

3.4

0

1

YES

REFOUT Disabled, ASCLK = MCLK/48

REFCAP On Only

0.7

0.0001

0.002

1.1

0

NO

REFOUT Disabled

REFCAP and

REFOUT On Only

1

0.0001

0.002

1.7

0

NO

REFOUT Enabled

All Sections Off

0.0001

0.04

0.015

0.1

0

YES

MCLK Active Levels Equal to 0 V and DVDD

All Sections Off

0.0001

0.005

0.05

0

NO

Digital Inputs Static and Equal to 0 V or

DVDD

The above values are in mA.

RL

10k

CL

50pF

Figure 1. AUXDAC Load Equivalent Circuit

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