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 10 of 40
TYPICAL PERFORMANCE CHARACTERISTICS
–120
–100
–80
–60
–40
–20
0
0 10 20 30 40 50 60 70 80 90 100
AMPLITUDE (dB)
INPUT FREQUENCY (kHz)
AV
DD
= 5V
DV
DD
= 5V
V
DRIVE
= 3V
T
A
= 25°C
f
SAMPLE
= 200kSPS
RANGE = 0V TO V
REF
SINGLE-ENDED MODE
SNR = 61.6dB
THD = –84.0dB
SINAD = 61.49dB
SFDR = 79.05dB
10660-004
Figure 4. ADC FFT, 200 kSPS, f
IN
= 10 kHz, Single-Ended Mode
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0 128 256 384 512 640 768 896 1024
INL ERROR (LSB)
ADC CODE
AV
DD
= DV
DD
= 5.25V
V
DRIVE
= 1.8V
CHANNEL 3
INTERNAL REFERENCE
T
A
= 25°C
WCP INL = 0.068LSB
WCN INL = –0.255LSB
10660-006
SINGLE-ENDED MODE, 0V TO 4 × V
REF
RANGE
Figure 5. Typical ADC INL, Single-Ended Mode
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0 128 256 384 512 640 768 896 1024
DNL ERROR (LSB)
ADC CODE
AV
DD
= DV
DD
= 5.25V
V
DRIVE
= 1
.8V
CHANNEL 3
INTERNAL REFERENCE
T
A
= 25°C
WCP DNL = 0.11LSB
WCN DNL
= –0.119LSB
SINGLE-ENDED MODE, 0V TO 4 × V
REF
RANGE
10660-007
Figure 6. Typical ADC DNL, Single-Ended Mode
–120
–100
–80
–60
–40
–20
0
0 10 20 30 40 50 60 70 80 90 100
AMPLITUDE (dB)
INPUT FREQUENCY (kHz)
10660-005
AV
DD
= 5V
DV
DD
= 5.25V
V
DRIVE
= 1.8V
T
A
= 25°C
f
SAMPLE
= 200kSPS
RANGE = 0V TO 2 × V
REF
DIFFERENTIAL MODE
SNR = 61.798dB
THD = –86.602dB
SINAD = 61.784dB
SFDR = 86.142dB
Figure 7. ADC FFT, 200 kSPS, f
IN
= 10 kHz, Differential Mode
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0 128 256 384 512 640 768 896 1024
INL ERROR (LSB)
ADC CODE
DV
DD
= 5.25V
AV
DD
= 4.75V
V
DRIVE
= 3.3V
CHANNEL 0 AND CHANNEL 1
INTERNAL REFERENCE
T
A
= 25°C
WCP INL = 0.091LSB
WCN INL = –0.093LSB
DIFFERENTIAL MODE, 0V TO V
REF
RANGE
10660-008
Figure 8. Typical ADC INL, Differential Mode
0 128 256 384 512 640 768 896 1024
DNL ERROR (LSB)
ADC CODE
10660–009
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
DV
DD
= 5.25V
AV
DD
= 4.75V
V
DRIVE
= 3.3V
CHANNEL 0 AND CHANNEL 1
INTERNAL REFERENCE
T
A
= 25°C
WCP INL = 0.067LSB
WCN INL = –0.08LSB
DIFFERENTIAL MODE, 0V TO V
REF
RANGE
Figure 9. Typical ADC DNL, Differential Mode