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| 型號： | EVAL-AD7719EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/40頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7719 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 2 |
| 位數(shù)： | 16，24 |
| 采樣率（每秒）： | 105 |
| 數(shù)據(jù)接口： | 串行 |
| 輸入范圍： | 2 Vpp |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 4.85mW @ 105SPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7719 |
| 已供物品： | 板 |
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REV. A
AD7719
–23–
Table XIII. Main ADC Control Register (AD0CON) Bit Designations (continued)
Bit Location
Bit Name
Description
AD0CON2
RN2
Main ADC Range Bits.
AD0CON1
RN1
Written by the user to select the main ADC input range as follows.
AD0CON0
RN0
RN2
RN1
RN0
Selected Main ADC Input Range (VREF = 2.5 V)
00
0
±20 mV
00
1
±40 mV
01
0
±80 mV
01
1
±160 mV
10
0
±320 mV
10
1
±640 mV
11
0
±1.28 V
11
1
±2.56 V
Aux ADC Control Registers (AD1CON):
(A3, A2, A1, A0 = 0, 0, 1, 1; Power-On Reset = 0x00)
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 uni-
polar or bipolar coding. Table XIV outlines the bit designations
for the aux ADC control register. AD1CON7 through AD1CON0
indicate the bit location, with AD1CON denoting that the bits
are in the aux ADC control register. AD1CON7 denotes the
first bit of the data stream. The number in parentheses 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.
AD1CON6
ACH2
Aux ADC Channel Selection Bits.
AD1CON5
ACH1
Written by the user to select the active input channels used by the aux ADC as follows:
AD1CON4
ACH0
CHCON
ACH2
ACH1
ACH0
Positive Input
Negative Input
00
AIN3
AGND
00
01
AIN4
AGND
00
10
AIN5
AIN6
00
11Temp Sensor
(Temp Sensor Routed to the ADC Inputs)
01
00
AGND
AGND (Internal Short)
10
00
AIN5
AGND
10
01
AIN6
AGND
10
AIN5
AIN6
10
11Temp Sensor
(Temp Sensor Routed to the ADC Inputs)
11
00
AGND
AGND (Internal Short)
X1
01Not Defined
X1
10Not Defined
X1
11Not Defined
AD1CON3
U/
B
Aux ADC Unipolar/Bipolar Selection Bit.
Set by user to enable unipolar coding, i.e., zero differential input will result in 0x0000 output.
Cleared by user to enable bipolar coding, zero differential input will result in 0x8000 output.
AD1CON2
0
Must be zero for specified operation.
AD1CON1
0
Must be zero for specified operation.
AD1CON0
ARN
Auxiliary Channel Input Range Bit.
When set by the user, the input range is ±REFIN2. When cleared by the user, the input range is ±REFIN2/2.
NOTES
1. When the temperature sensor is selected, the AD7719 automatically selects its internal reference. The temperature sensor is not factory calibrated. Temp sensor
is suitable for relative temperature measurements. The temperature sensor yields conversion results where a conversion result of 0x8000 equates to typically 0°C.
2. A 1°C change in temperature will normally result in a 256 LSB change in the AD1 data register (ADC conversion result).
7
N
O
C
1
D
A6
N
O
C
1
D
A5
N
O
C
1
D
A4
N
O
C
1
D
A3
N
O
C
1
D
A2
N
O
C
1
D
A1
N
O
C
1
D
A0
N
O
C
1
D
A
)
0
(
N
E
1
D
A)
0
(
2
H
C
A)
0
(
1
H
C
A)
0
(
0
H
C
A/
U B
)
0
()
0
(
0)
0
(
0)
1
(
N
R
A
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