AD7156_17 datasheet(5/29 Pages) AD

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AD7156

Rev. 0 | Page 4 of 28

Parameter

Min

Typ

Max

Unit1

Test Conditions/Comments

POWER REQUIREMENTS

VDD-to-GND Voltage

1.8

3.6

V

IDD Current4, 8

65

75

μA

VDD ≤ 2.7 V, see Figure 20

70

85

μA

VDD = 3.6 V, see Figure 20

IDD Current Power-Down Mode4, 8

2

10

μA

VDD ≤ 2.7 V, see Figure 21

2

17

μA

VDD = 3.6 V, see Figure 21

1 Capacitance units: 1 pF = 1 × 10−12 F; 1 fF = 10−15 F.

2 The CAPDAC can be used to shift (offset) the input range. The total capacitance of the sensor can therefore be up to the sum of the CAPDAC value and the conversion

input range. With the auto-DAC feature, the CAPDAC is adjusted automatically when the CDC input value is lower than 25% or higher than 75% of the CDC nominal

input range.

3 The maximum capacitance of the sensor connected between the EXCx and CINx pins is equal to the sum of the minimum guaranteed value of the CAPDAC and the

minimum guaranteed input range.

4 The maximum specification is not production tested but is supported by characterization data at initial product release.

5 The resolution of the converter is not limited by the output data format or output data LSB (least significant bit) size, but by the converter and system noise level. The

noise-free resolution is defined as level of peak-to-peak noise coming from the converter itself, with no connection to the CIN and EXC pins.

6 These specifications are understood separately. Any combination of the capacitance to ground and serial resistance may result in additional errors, for example gain

error, gain drift, offset error, offset drift, and power supply rejection.

7 Specification is not production tested but is guaranteed by design.

8 Digital inputs equal to VDD or GND.

Số phần tương tự - AD7156_17

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