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 12 of 40
0
100
200
300
400
500
600
700
800
900
511 512
OCCURRENCES
OUTPUT CODE
510
10660-017
AV
DD
= 5V
DV
DD
= 5V
V
DRIVE
= 2.5V
T
A
= 25°C
Figure 16. Histogram of Codes
–0.5
–0.3
–0.1
0.1
0.3
0.5
0 128 256 384 512 640 768 896 1024
INL ERROR (LSB)
DAC CODE
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
INTERNAL REFERENCE
T
A
= 25°C
10660-019
Figure 17. Typical DAC INL vs. Output Code
–1.0
–0.9
–0.8
–0.7
–0.6
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
–40 –20 0 20 40 60 80 100 120
INL ERROR (LSB)
TEMPERATURE (°C)
INL MAX
INL MIN
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
INTERNAL REFERENCE
10660-021
Figure 18. DAC INL vs. Temperature
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1k 10k 100k 1M
REFERENCE VOLTAGE (V)
LOAD RESISTANCE (Ω)
AV
DD
= 5V
DV
DD
= V
DRIVE
= 3V
f
SAMPLE
= 225kSPS
T
A
= 25°C
ANALOG INPUT RANGE = AV
DD
– 4 × V
REF
10660-018
Figure 19. Reference Voltage vs. Load Resistance
–0.25
–0.15
–0.05
0.05
0.15
0.25
0 128 256 384 512 640 768 896 1024
DNL ERROR (LSB)
DAC CODE
10660-020
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
INTERNAL REFERENCE
T
A
= 25°C
Figure 20. Typical DAC DNL vs. Output Code
–1.0
–0.9
–0.8
–0.7
–0.6
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
–40 –20 0 20 40 60 80 100 120
DNL ERROR (LSB)
TEMPERATURE (°C)
DNL MAX
DNL MIN
10660-022
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
INTERNAL REFERENCE
Figure 21. DAC DNL vs. Temperature