AD7705BR Analog Devices Inc, AD7705BR Datasheet - Page 18

• Manufacturer Part Number: AD7705BR
• Description: A/D Converter (A-D) IC
• Manufacturer: Analog Devices Inc

Specifications of AD7705BR

• Mounting Type: Surface Mount
• No. Of Channels: 2
• Peak Reflow Compatible (260 C): No
• Supply Voltage: 3.3V
• No. Of Bits: 16 Bit
• Leaded Process Compatible: No
• Features: 3V/5V, 1mW, 2?Channel, 16?Bit
• Rohs Status: RoHS non-compliant
• Number Of Bits: 16
• Sampling Rate (per Second): 500
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Number Of Elements: 1
• Resolution: 16Bit
• Architecture: Delta-Sigma
• Sample Rate: 0.5KSPS
• Input Polarity: Unipolar/Bipolar
• Input Type: Voltage
• Differential Input: Yes
• Power Supply Requirement: Single
• Single Supply Voltage (typ): 3/5V
• Single Supply Voltage (min): 2.7V
• Single Supply Voltage (max): 5.25V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Power Dissipation: 1mW
• Integral Nonlinearity Error: ±0.003%FSR
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Package Type: SOIC W
• Input Signal Type: Differential
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: EVAL-AD7705EBZ - BOARD EVALUATION FOR AD7705
• Lead Free Status / Rohs Status: Not Compliant

AD7705/AD7706
Table 16. Operating Mode Options
MD1
0
0
1
1
Table 17. Gain Selection
G2
0
0
0
0
1
1
1
1
MD0
0
1
0
1
Operating Mode
Normal Mode. In this mode, the device performs normal conversions.
Self-Calibration. This activates self-calibration on the channel selected by CH1 and CH0 of the communication register. This
is a one-step calibration sequence. When the sequence is complete, the part returns to normal mode, with both MD1 and
MD0 returning to 0. The DRDY output or bit goes high when calibration is initiated, and returns low when self-calibration is
complete and a new valid word is available in the data register. The zero-scale calibration is performed at the selected gain
on internally shorted (zeroed) inputs, and the full-scale calibration is performed at the selected gain on an internally
generated V
Zero-Scale System Calibration. This activates zero-scale system calibration on the channel selected by CH1 and CH0 of the
communication register. Calibration is performed at the selected gain on the input voltage provided at the analog input
during this calibration sequence. This input voltage should remain stable for the duration of the calibration. The DRDY
output or bit goes high when calibration is initiated, and returns low when zero-scale calibration is complete and a new
valid word is available in the data register. At the end of the calibration, the part returns to normal mode, with both MD1
and MD0 returning to 0.
Full-Scale System Calibration. This activates full-scale system calibration on the selected input channel. Calibration is
performed at the selected gain on the input voltage provided at the analog input during this calibration sequence. This
input voltage should remain stable for the duration of the calibration. The DRDY output or bit goes high when calibration is
initiated, and returns low when full-scale calibration is complete and a new valid word is available in the data register. At the
end of the calibration, the part returns to normal mode, with both MD1 and MD0 returning to 0.
G1
0
0
1
1
0
0
1
1
REF
/selected gain.
G0
0
1
0
1
0
1
0
1
Rev. C | Page 18 of 44
Gain Setting
1
2
4
8
16
32
64
128