Datasheet
Table Of Contents
- Features
- Applications
- Functional Block Diagram
- General Description
- Table of Contents
- Revision History
- Specifications
- Absolute Maximum Ratings
- Pin Configuration and Function Descriptions
- Typical Performance Characteristics
- Theory of Operation
- Serial Port Interface (SPI)
- Register Structure
- Register Descriptions
- Vendor ID Register (Address 0x00)
- ADC Data Register (Address 0x01)
- ADC Sequence Register (Address 0x03)
- Configuration Register Bank (Address 0x05)
- Digital Output Driver Subregister (Address 0x01)
- Digital I/O Function Subregister (Address 0x02)
- General Subregister (Address 0x08)
- VIN RANGE0 and VIN RANGE1 Subregisters (Address 0x10 and Address 0x11)
- ADC Sampling Mode Subregister (Address 0x12)
- VIN ALERT0 Routing and VIN ALERT1 Routing Subregisters (Address 0x13 and Address 0x14)
- VIN Filter Subregister (Address 0x15)
- Conversion Delay Control Subregister (Address 0x16)
- Temperature Sensor Subregister (Address 0x20)
- Temperature Sensor Alert Routing Subregister (Address 0x21)
- GPIO2/DAC DISABLE0 and GPIO4/DAC DISABLE1 Subregisters (Address 0x30 and Address 0x31)
- Alert Limits Register Bank (Address 0x06)
- Alert Flags Register Bank (Address 0x07)
- Minimum and Maximum Register Bank (Address 0x08)
- Offset Register Bank (Address 0x09)
- DAC Buffer Enable Register (Address 0x0A)
- GPIO Register (Address 0x0B)
- Conversion Command Register (Address 0x0E)
- ADC Conversion Result Registers, VIN0 to VIN7 (Address 0x10 to Address 0x17)
- TSENSE Conversion Result Register (Address 0x20)
- DAC Channel Registers (Address 0x30 to Address 0x33)
- ADC Conversion Control
- DAC Output Control
- Alerts and Limits
- Outline Dimensions
AD7292 Data Sheet
Rev. 0 | Page 34 of 40
CONVERSION COMMAND REGISTER
(ADDRESS 0x0E)
The conversion command signals the ADC to begin conversions.
See the ADC Conversion Control section for more information.
ADC CONVERSION RESULT REGISTERS, VIN0 TO
VIN7 (ADDRESS 0x10 TO ADDRESS 0x17)
The 16-bit, read-only ADC conversion result registers store the
conversion results of the eight ADC input channels. Bits[D15:D6]
store the 10-bit, straight binary result; Bits[D5:D0] contain the
channel ID and alert information. Table 43 lists the contents
of the two bytes that are read from the ADC conversion result
registers. Channel ID numbers 0 to 7 correspond to the analog
input channels, VIN0 to VIN7.
T
SENSE
CONVERSION RESULT REGISTER
(ADDRESS 0x20)
The 16-bit, read-only T
SENSE
conversion result register stores the
ADC data generated from the internal temperature sensor. The
temperature data is stored in a 14-bit straight binary format. Bit D2
has a weight of 0.03125°C. An output of all 0s is equal to −256°C;
this value is output by the AD7292 until the first measurement is
completed. An output of 10 0000 0000 0000 corresponds to 0°C.
When digital filtering is disabled, Bit D3 and Bit D2 are set to 0,
producing a 12-bit straight binary result with an LSB of 0.125°C.
See the Temperature Sensor section for more information.
DAC CHANNEL REGISTERS (ADDRESS 0x30 TO
ADDRESS 0x33)
Writing to the DAC channel registers sets the DAC output voltage
codes. For more information, see the DAC Output Control section.
Table 43. ADC Conversion Result Register Format
MSB LSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 [D5:D2] D1 D0
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 4-bit channel ID
(0000 to 0111)
T
SENSE
alert flag
ADC
alert flag
Table 44. T
SENSE
Conversion Result Register Format
MSB LSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4
D3
1
D2
1
D1 D0
B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 T
SENSE
alert
flag
ADC
alert
flag
1
When digital filter is enabled (see the Temperature Sensor Subregister (Address 0x20) section).
Table 45. DAC Channel Register Format
MSB LSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 0 0 0 0 Copy
LDAC