Sample Rate; Measurement Ranges And Accuracy; Hardware Identification System - Microchip Technology ATtiny3217 Xplained Pro Manual

• Reference clock: Reference clock for the XAM.
3.2.3

Sample Rate

The raw sampling rate of the XAM is up to 250 kHz, and with the default averaging configuration (average of 16
samples), the actual output of the XAM is 16.67 ksps.
Info: The XAM output sample rate is not an integer fraction of the raw sampling.
3.2.4

Measurement Ranges and Accuracy

The XAM has four measurement ranges. These are defined by two shunt resistors and two gain stages.
Table 3-2. XAM Measurement Ranges and Accuracy
Measurement
Range
Range 1
Range 2
Range 3
Range 4
The ranges are automatically switched by the XAM to achieve the best measurement results, and the currently active
range is visualized in the
and the XAM switches the range automatically before reaching this limit.
3.3

Hardware Identification System

All Xplained Pro extension boards come with an identification chip (ATSHA204A CryptoAuthentication
uniquely identify the boards that are connected to the Xplained Pro Evaluation Kit. This chip contains information that
identifies the extension with its name and some extra data. When an Xplained Pro extension is connected to an
Xplained Pro Evaluation Kit, the information is read and sent to the Atmel Studio/MPLAB
shows the data fields stored in the ID chip with example content.
Table 3-3. Xplained Pro ID Chip Content
Data Field
Manufacturer
Product name
Product revision
Product serial number
Minimum voltage [mV]
©
2020 Microchip Technology Inc.
Hardware
Low current shunt and high
gain stage
Low current shunt and low
gain stage
High current shunt and high
gain stage
High current shunt and low
gain stage
Data Visualizer front-end tool. The maximum voltage drop over the shunt resistor is 100 mV,
ASCII string
ASCII string
ASCII string
ASCII string
uint16_t
ATtiny3217 Xplained Pro
Resolution Accuracy
20 nA 1 LSB ±1% Accuracy will decrease below 1
150 nA 1 LSB ±1%
10 μA 1 LSB ±1%
100 μA 1 LSB ±1% Accuracy will decrease above 100
Data Type
Microchip'\0'
Segment LCD1 Xplained Pro'\0'
02'\0'
1774020200000010'\0'
3000
User Guide
Xplained Pro
Comments
μA. The typical accuracy for 300
nA is 1 LSB ±10%.
mA. Typical accuracy is 1 LSB
±5% at 400 mA. The maximum
current is 400 mA.
™
chip) to
®
X. The following table
Example Content
DS50002765B-page 9