© 2016 Integrated Device Technology, Inc

10

November 14, 2016

ZSC31015 Datasheet

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Overall Accuracy

– Digital

(only IC, without sensor bridge)

-25°C to 85°C

0.1%

%FSO

-50°C to 150°C

0.25%

Overall Accuracy

– Analog

3), 4)

(only IC, without sensor bridge)

-25°C to 85°C

0.25%

%FSO

-40°C to 125°C

0.35%

-50°C to 150°C

0.5%

1)

Note: This is

 4 LSBs for the 14-bit A-to-D conversion. This results in absolute accuracy to 12-bits on the A-to-D result. Non-linearity is typically better at

temperatures less than 125°C.

2)

recommended for this configuration.

3)

Not included is the quantization noise of the DAC. The 12-bit DAC has a quantization noise of

 ½ LSB = 0.61mV (@ 5V VDD) = 0.0125%.

4)

Analog output range 2.5% to 95%

1.4.

Analog Inputs versus Output Resolution

The ZSC31015 has a fully differential chopper-stabilized pre-amplifier with four programmable gain settings. The

output of the pre-amplifier feeds into a 14-bit charge-balanced ADC. Span, offset, temperature, and non-linearity

correction are performed in the digital domain. Then the resulting corrected bridge value can be output in analog

form through a 12-bit DAC or as a 16-bit serial digital packet. The resolution of the output depends on the input

span (bridge sensitivity) and the analog gain setting programmed. Digital gains can vary from [0,32). Analog gains

available are 6, 24, 48, and 96.

Note: At higher analog gain settings, there will be higher output resolution, but the ability of the ZSC31015 to

handle large offsets decreases. This is expected because the offset is also amplified by the analog gain and can

therefore saturate the ADC input.

The following tables outline the guaranteed minimum resolution for a given bridge sensitivity range.

Table 1.1

ADC Resolution Characteristics for an Analog Gain of 6

Analog Gain 6

Input Span [mV/V]

Allowed Offset

(+/- % of Span)

1

Minimum Guaranteed

Resolution [Bits]

Min

Typ

Max

57.8

80.0

105.8

38%

12.4

50.6

70.0

92.6

53%

12.2

43.4

60.0

79.4

73%

12.0

36.1

50.0

66.1

101%

11.7

28.9

40.0

52.9

142%

11.4

21.7

30.0

39.7

212%

11.4

1)

In addition to Tco, Tcg.