EVAL-AD7734EBZ Analog Devices Inc, EVAL-AD7734EBZ Datasheet - Page 19

• Manufacturer Part Number: EVAL-AD7734EBZ
• Description: BOARD EVALUATION FOR AD7734
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7734EBZ

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 15.4k
• Data Interface: Serial
• Inputs Per Adc: 4 Single Ended
• Input Range: ±10 V
• Power (typ) @ Conditions: 85mW @ 5 V
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Utilized Ic / Part: AD7734
• Silicon Manufacturer: Analog Devices
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: AD7734
• Kit Contents: Board
• Development Tool Type: Hardware - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Channel Setup Registers
8 Bits, Read/Write Register, Address 28h–2Bh, Default Value 00h
These registers are used to configure the selected channel, to configure its input voltage range, and to set up the corresponding channel
status register.
Bit
Mnemonic
Default
Bit
7–5
4
3
2
1–0
Table 15.
RNG1
0
0
1
1
Channel Conversion Time Registers
8 Bits, Read/Write Register, Address 30h–33h, Default Value 91h
The conversion time registers enable or disable chopping and configure the digital filter for a particular channel. This register value affects
the conversion time, frequency response, and noise performance of the ADC.
Bit
Mnemonic
Default
Bit
7
6–0
Mnemonic
CHOP
FW
Mnemonic
0
Stat OPT
ENABLE
0
RNG1–RNG0
RNG0
0
1
0
1
±10 V
0 V to +10 V
±5 V
0 V to +5 V
Nominal Input Voltage Range
Bit 7
0
Description
These bits must be 0 for proper operation.
Status Option. When this bit is set to 1, the P0 and P1 bits in the channel status register will reflect the state of
the P0 and P1 pins. When this bit is reset to 0, the RDY bit in the channel status register will reflect the channel
corresponding to the RDY bit in the ADC status register.
Channel Enable. Set this bit to 1 to enable the channel in the continuous conversion mode. A single conversion
will take place regardless of this bit’s value.
This bit must be 0 for proper operation.
This is the channel input voltage range (see Table 15).
Bit 7
CHOP
1
Description
Chopping Enable Bit. Set to 1 to apply chopping mode for a particular channel.
CHOP = 1, single conversion or continuous conversion with one channel enabled.
Conversion Time (µs) = (FW × 128 + 248)/MCLK Frequency (MHz), the FW range is 2 to 127.
CHOP = 1, continuous conversion with two or more channels enabled.
Conversion Time (µs) = (FW × 128 + 249)/MCLK Frequency (MHz), the FW range is 2 to 127.
CHOP = 0, single conversion or continuous conversion with one channel enabled.
Conversion Time (µs) = (FW × 64 + 206)/MCLK Frequency (MHz), the FW range is 3 to 127.
CHOP = 0, continuous conversion with two or more channels enabled.
Conversion Time (µs) = (FW × 64 + 207)/MCLK Frequency (MHz), the FW range is 3 to 127.
0
Bit 6
0
0
Bit 6
Bit 5
0
0
Bit 5
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Stat OPT
Bit 4
0
Bit 4
FW (7-Bit Filter Word)
Bit 3
ENABLE
0
Bit 3
11h
Bit 2
0
0
Bit 2
Bit 1
RNG1
0
Bit 1
AD7734
Bit 0
RNG0
0
Bit 0