AD7739BRU Analog Devices Inc, AD7739BRU Datasheet - Page 14

• Manufacturer Part Number: AD7739BRU
• Description: IC ADC 24BIT 8-CH 24-TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7739BRU

• Rohs Status: RoHS non-compliant
• Number Of Bits: 24
• Sampling Rate (per Second): 15.1k
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 100mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP (0.173", 4.40mm Width)
• For Use With: EVAL-AD7739EBZ - BOARD EVAL FOR AD7739

AD7739
REGISTER DESCRIPTIONS
Table 11. Register Summary
Register
Communications
I/O Port
Revision
Test
ADC Status
Checksum
ADC Zero-Scale Calibration
ADC Full-Scale Calibration
Channel Data
Channel Zero-Scale Cal.
Channel Full-Scale Cal.
Channel Status
Channel Setup
Channel Conversion Time
Mode
1
2
Table 12. Operational Mode Summary
MD2
0
0
0
0
1
1
1
1
The three LSBs of the register address, i.e., Bit 2, Bit 1, and Bit 0 in the communications register, specify the channel number of the register being accessed.
The AD7739 has only one mode register, although the mode register can be accessed in one of eight address locations. The address used to write the mode register
specifies the ADC channel on which the mode will be applied. Only address 0x38 must be used for reading from the mode register.
2
MD1
0
0
1
1
0
0
1
1
1
1
1
MD0
0
1
0
1
0
1
0
1
1
1
Mode
Idle
Continuous Conversion
Single Conversion
Power-Down (Standby)
ADC Zero-Scale Self-Calibration
ADC Full-Scale Self-Calibration (for 2.5 V)
Channel Zero-Scale System Calibration
Channel Full-Scale System Calibration
1
0x10–0x17 R/W
0x20–0x27
0x30–0x37 R/W
0x08–0x0F
0x18–0x1F R/W
0x28–0x2F R/W
0x38–0x3F R/W
(hex)
Addr
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
R/W
R/W
R/W
R/W
R/W
Dir
W
R
R
R
R
BUFOFF
P0 Pin
CHOP
RDY7
Bit 7
MD2
CH2
P0
0
0
0
1
0
x
Channel Number
Rev. 0 | Page 14 of 32
Chip Revision Code
P1 Pin
COM1
RDY6
Bit 6
MD1
R/W
CH1
P1
0
0
0
x
24-Bit Channel Zero-Scale Calibration Registers
24-Bit Channel Full-Scale Calibration Registers
24-Bit ADC Zero-Scale Calibration Register
P0 DIR
COM0
RDY5
Bit 5
MD0
Table 13. Input Range Summary
RNG2
1
1
0
0
0
0
CH0
1
0
0
0
x
24-Bit Manufacturing Test Register
24-Bit ADC Full-Scale Register
16-Bit Checksum Register
16-/24-Bit Data Registers
Stat OPT
CLKDIS
P1 DIR
RNG1
0
0
0
0
1
1
RDY4
Bit 4
0/P0
Default Value
1
0
0
0
0
x
0x80 0000
0x80 0000
0x80 0000
0x20 0000
FW (7-Bit Filter Word)
0x8000
6-Bit Register Address
RDY/P1
ENABLE
0
1
0
1
0
1
RNG0
RDYFN
DUMP
RDY3
0x11
Bit 3
0
1
0
0
0
0
±2.5 V
+2.5 V
±1.25 V
+1.25 V
±0.625 V
+0.625 V
Nominal Input Voltage Range
REDPWR
Cont RD
Chip Generic Code
NOREF
RNG2
RDY2
Bit 2
0
0
0
0
0
0
24/16 BIT
RNG1
RDY1
Bit 1
SIGN
0
0
0
0
0
0
0
CLAMP
RNG0
SYNC
RDY0
Bit 0
OVR
0
1
0
0
0
0