AMS 5105

Pressure sensor with one analog and two switching outputs

May 2012 - Rev. 2.0

Page 4/8

www.analogmicro.de

Parameter

Minimum

Typical

Maximum

Units

Long term stability

<0.5

%FSO/a

Supply voltage (VS )

4.75

5

5.25

V

Current consumption (switching outputs open)

9)

5

mA

Resolution A/D converter (analog output)

14

bits

Resolution D/A converter

11

bits

Resolution analog output signal

0.05

%FSO

Resolution of adjustment threshold

10)

14

bit

Resolution of adjustment hysteresis

10)

14

bit

Load resistance at analog output RL

2k

Ω

Capacitive load at analog output

50

nF

Ratiometricity error (@VS = 4.75…5.25 V)

500

ppm

Reaction time (10%...90% rise time)

1

2

ms

Load resistance at analog output RL

2k

Ω

Start-up time (after power on)

5

ms

Pressure changes

10

6

Compensated temperature range

-25

85

°C

Weight

3

g

Media compatibility

See "Specification notes"

11) 12)

Table 3: Specifications

SPECIFICATION NOTES

1)

The analog voltage output signal is ratiometric to the supply voltage

2)

See Table 1

3)

The Full Span Output (FSO) is the algebraic difference between the output signal at the specified minimum

pressure and the output signal at the specified maximum pressure (see "Pressure ranges").

4)

The two switching outputs (Switch 1 and Switch 2) are software configurable (with the AMS 5105 starter kit). The

output modes can be set as normally open (NO), normally closed (NC) and to window mode. Thresholds and

hysteresis can be set individually for each switching output. The default factory configuration of the two switching

outputs is NO, with the thresholds set to 10% (Switch1) and 90% (Switch2). Hysteresis is set to 5% for both

switching outputs.

5)

Load resistance > 1 kOhm

6)

0%p refers to the specified minimum pressure and 100%p to the specified maximum pressure (see Table 3)

7)

Accuracy is defined as the maximum deviation of the measurement value from the ideal characteristic curve at

room temperature (RT) in %FSO, including the adjustment error (offset and span), nonlinearity, pressure

hysteresis and repeatability. Nonlinearity is the measured deviation from the best fit straight line (BFSL) across

the entire pressure range. Pressure hysteresis is the maximum deviation of the output value at any pressure

within the specified range when this pressure is cycled to and from the minimum or maximum rated pressure.

Repeatability is the maximum deviation of the output value at any pressure within the specified range after 10

pressure cycles.

8)

The overall error is defined as the maximum deviation of the measurement value from the ideal characteristic

curve in %FSO across the entire temperature range (-25…85°C).

9)

With active switching outputs the current consumption increases by the output currents of the switching outputs

(see "Specifications/Logic switching outputs”).

10) With the AMS 5105 starter kit software an adjustment of 0.1 %p (see note 6) is possible.

11) Media compatibility of pressure port 1 (for a description of port 1, see Figure 3): clean, dry gases, non-corrosive to

silicon, RTV silicone rubber, gold (alkaline or acidic liquids can destroy the sensor).

12) Media compatibility of pressure port 2 (for a description of port 2, see Figure 3): fluids and gases non-corrosive to

silicon, Pyrex, RTV silicone rubber.