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AD7761 Datasheet(PDF) 64 Page - Analog Devices

Part # AD7761
Description  8-Channel, 16-Bit, Simultaneous Sampling ADC with Power Scaling, 110.8 kHz BW
PDF  69 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7761 Datasheet(HTML) 64 Page - Analog Devices

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AD7761
Data Sheet
Rev. 0 | Page 64 of 69
ANALOG INPUT PRECHARGE BUFFER ENABLE REGISTER CHANNEL 0 TO CHANNEL 3
Address: 0x11, Reset: 0xFF, Name: Precharge Buffer 1
This register turns on or off the precharge buffers on the analog inputs. When writing to these registers, the user must write the inverse of
the required bit settings. For example, to clear Bit 7 of this register, the user must write 0x01 to the register. This clears Bit 7 and sets all
other bits. If the user reads the register again after writing 0x01, the data read is 0xFE, as required.
Table 48. Bit Descriptions for Precharge Buffer 1
Bits
Bit Name
Settings
Description
Reset
7
CH3_PREBUF_NEG_EN
0
Off
0x1
1
On
6
CH3_PREBUF_POS_EN
0
Off
0x1
1
On
5
CH2_PREBUF_NEG_EN
0
Off
0x1
1
On
4
CH2_PREBUF_POS_EN
0
Off
0x1
1
On
3
CH1_PREBUF_NEG_EN
0
Off
0x1
1
On
2
CH1_PREBUF_POS_EN
0
Off
0x1
1
On
1
CH0_PREBUF_NEG_EN
0
Off
0x1
1
On
0
CH0_PREBUF_POS_EN
0
Off
0x1
1
On
ANALOG INPUT PRECHARGE BUFFER ENABLE REGISTER CHANNEL 4 TO CHANNEL 7
Address: 0x12, Reset: 0xFF, Name: Precharge Buffer 2
This register turns on or off the precharge buffers on the analog inputs. When writing to these registers, the user must write the inverse of
the required bit settings. For example, to clear Bit 7 of this register, the user must write 0x01 to the register. This clears Bit 7 and sets all
other bits. If the user reads the register again after writing 0x01, the data read is 0xFE, as required.
Table 49. Bit Descriptions for Precharge Buffer 2
Bits
Bit Name
Settings
Description
Reset
7
CH7_PREBUF_NEG_EN
0
Off
0x1
1
On
6
CH7_PREBUF_POS_EN
0
Off
0x1
1
On
5
CH6_PREBUF_NEG_EN
0
Off
0x1
1
On
4
CH6_PREBUF_POS_EN
0
Off
0x1
1
On
3
CH5_PREBUF_NEG_EN
0
Off
0x1
1
On
2
CH5_PREBUF_POS_EN
0
Off
0x1
1
On
1
CH4_PREBUF_NEG_EN
0
Off
0x1
1
On
0
CH4_PREBUF_POS_EN
0
Off
0x1
1
On



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