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1 | Kernel driver ads7828 | ||
2 | ===================== | ||
3 | |||
4 | Supported chips: | ||
5 | * Texas Instruments/Burr-Brown ADS7828 | ||
6 | Prefix: 'ads7828' | ||
7 | Addresses scanned: I2C 0x48, 0x49, 0x4a, 0x4b | ||
8 | Datasheet: Publicly available at the Texas Instruments website : | ||
9 | http://focus.ti.com/lit/ds/symlink/ads7828.pdf | ||
10 | |||
11 | Authors: | ||
12 | Steve Hardy <steve@linuxrealtime.co.uk> | ||
13 | |||
14 | Module Parameters | ||
15 | ----------------- | ||
16 | |||
17 | * se_input: bool (default Y) | ||
18 | Single ended operation - set to N for differential mode | ||
19 | * int_vref: bool (default Y) | ||
20 | Operate with the internal 2.5V reference - set to N for external reference | ||
21 | * vref_mv: int (default 2500) | ||
22 | If using an external reference, set this to the reference voltage in mV | ||
23 | |||
24 | Description | ||
25 | ----------- | ||
26 | |||
27 | This driver implements support for the Texas Instruments ADS7828. | ||
28 | |||
29 | This device is a 12-bit 8-channel A-D converter. | ||
30 | |||
31 | It can operate in single ended mode (8 +ve inputs) or in differential mode, | ||
32 | where 4 differential pairs can be measured. | ||
33 | |||
34 | The chip also has the facility to use an external voltage reference. This | ||
35 | may be required if your hardware supplies the ADS7828 from a 5V supply, see | ||
36 | the datasheet for more details. | ||