參數(shù)資料
型號: AD7719BRU
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC
中文描述: 6-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝: MS-153AE, TSSOP-28
文件頁數(shù): 23/40頁
文件大?。?/td> 367K
代理商: AD7719BRU
REV. 0
AD7719
–23–
Table XIII (continued)
AD0CON3
U/
B
Main ADC Unipolar/Bipolar Bit.
Set
by user to enable unipolar coding i.e., Zero differential input will result in 000000 Hex output
and a full-scale differential input will result in FFFFFF Hex output when operated in 24-bit mode.
Cleared
by user to enable bipolar coding, Negative full-scale differential input will result in an
output code of 000000 Hex, Zero differential input will result in an output code of 800000 Hex
and a Positive full-scale differential input will result in an output code of FFFFFF Hex.
Main ADC Range Bits.
Written by the user to select the Main ADC input range as follows.
AD0CON2
AD0CON1
RN2
RN1
AD0CON0
RN0
RN2
0
0
0
0
1
1
1
1
RN1
0
0
1
1
0
0
1
1
RN0
0
1
0
1
0
1
0
1
Selected Main ADC Input Range (V
REF
= 2.5 V)
±
20 mV
±
40 mV
±
80 mV
±
160 mV
±
320 mV
±
640 mV
±
1.28 V
±
2.56 V
Aux ADC Control Registers (AD1CON ): (A3, A2, A1, A0 = 0, 0, 1, 1; Power-On Reset = 01 Hex)
The Aux ADC control Register is an 8-bit register from which data can be read or to which data can be written. This register is used
to configure the Aux ADC for range, channel selection and unipolar or bipolar coding. Table XIV outlines the bit designations for
the Aux ADC control register register. AD1CON7 through AD1CON0 indicate the bit location, AD1CON denoting the bits are in
the Aux ADC Control Register. AD1CON7 denotes the first bit of the data stream. The number in brackets indicates the power-on/
reset default status of that bit.
Table XIV. Aux ADC Control Register (AD1CON) Bit Designations
Bit
Location
Bit
Name
Description
AD1CON7
AD1EN
Aux ADC Enable Bit.
Set
by user to enable the Aux ADC. When set, the aux ADC operates according to the MD bits
in the mode register.
Cleared
by the user to power-down the aux ADC.
Aux ADC Channel Selection Bits.
Written by the user to select the active input channels used by the Aux ADC as follows:
AD1CON6
AD1CON5
AD1CON4
ACH2
ACH1
ACH0
CHCON
0
0
0
0
0
1
1
1
1
1
X
X
X
ACH2
0
0
0
0
1
0
0
0
0
1
1
1
1
ACH1
0
0
1
1
0
0
0
1
1
0
0
1
1
ACH0
0
1
0
1
0
0
1
0
1
0
1
0
1
Positive Input
AIN3
AIN4
AIN5
Temp Sensor
AGND
AIN5
AIN6
AIN5
Temp Sensor
AGND
Not Defined
Not Defined
Not Defined
Negative Input
AGND
AGND
AIN6
(Temp Sensor Routed to the ADC Inputs)
AGND (Internal Short)
AGND
AGND
AIN6
(Temp Sensor Routed to the ADC Inputs)
AGND (Internal Short)
AD1CON7
AD1CON6
AD1CON5
AD1CON4
AD1CON3
AD1CON2
AD1CON1
AD1CON0
AD1EN (0)
ACH2 (0)
ACH1 (0)
ACH0 (0)
U/
B
(0)
0 (0)
0 (0)
ARN (1)
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