AD7457 Analog Devices, AD7457 Datasheet - Page 15

• Manufacturer Part Number: AD7457
• Description: Pseudo Differential Input, 100 kSPS, 12-Bit ADC in 8-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7457

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOT

Table 5. SPORT0 Configuration
Bit
ISCLK
SLEN
RFSR
TFSR
IRFS
ITFS
RFSW
TFSW
INVRFS
INVTFS
Setting
1
1111
0
Don’t care
0
Don’t care
1
Don’t care
0
Don’t care
Comment/Description
Serial clock is generated internally
16 bits of conversion data
Receive frame sync required every word
Not used
RFS is set to be an input and is
generated externally.
Not used
Alternate receive framing
Not used
RFS is active high
Not used
Rev. A | Page 15 of 20
SPORT0 is configured by setting the bits in its control register,
as listed in Table 5.
The flag to generate the CS signal is generated by SPORT1. It is
connected to both the ADC and the RFS input of SPORT0 to
provide the frame sync signal for the DSP.
AD7457