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參數資料
| 型號： | AD7863ARS-3 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Simultaneous Sampling Dual 175 kSPS 14-Bit ADC |
| 中文描述： | 4-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | MO-150AH, SSOP-28 |
| 文件頁數： | 6/18頁 |
| 文件大小： | 207K |
| 代理商： | AD7863ARS-3 |
AD7863
–
6
–
REV. A
PIN FUNCTION DESCRIPTIONS
Pin
Mnemonic
Description
1
–
6
7
8
DB12
–
DB7
DGND
CONVST
Data Bit 12 to Data Bit 7. Three-state TTL outputs.
Digital Ground. Ground reference for digital circuitry.
Convert Start Input. Logic Input. A high to low transition on this input puts both track/holds into their hold
mode and starts conversion on both channels.
Data Bit 6 to Data Bit 0. Three-state TTL outputs.
Analog Ground. Ground reference for Mux, track/hold, reference and DAC circuitry.
Input Number 2 of Channel B. Analog Input voltage ranges of
±
10 V (AD7863-10),
±
2.5 V (AD7863-3)
and 0 V
–
2.5 V (AD7863-2).
Input Number 2 of Channel A. Analog Input voltage ranges of
±
10 V (AD7863-10),
±
2.5 V (AD7863-3)
and 0 V
–
2.5 V (AD7863-2).
Reference Input/Output. This pin is connected to the internal reference through a series resistor and is the
output reference source for the analog-to-digital converter. The nominal reference voltage is 2.5 V and this
appears at the pin.
Multiplexer Select. This input is used in conjunction with
CONVST
to determine on which pair of channels
the conversion is to be performed. If A0 is low when the conversion is initiated then channels V
A1,
V
A2
will
be selected. If A0 is high when the conversion is initiated, channels V
B1,
V
B2
will be selected.
Chip Select Input. Active low logic input. The device is selected when this input is active.
Read Input. Active low logic input. This input is used in conjunction with
CS
low to enable the data out-
puts and read a conversion result from the AD7863.
Busy Output. The busy output is triggered high by the falling edge of
CONVST
and remains high until
conversion is completed.
Analog and Digital Positive Supply Voltage, +5.0 V
±
5%.
Input Number 1 of Channel A. Analog Input voltage ranges of
±
10 V (AD7863-10),
±
2.5 V (AD7863-3)
and 0 V
–
2.5 V (AD7863-2).
Input Number 1 of Channel B. Analog Input voltage ranges of
±
10 V (AD7863-10),
±
2.5 V (AD7863-3)
and 0 V
–
2.5 V (AD7863-2).
Analog Ground. Ground reference for Mux, track/hold, reference and DAC circuitry.
Data Bit 13 (MSB). Three-state TTL output. Output coding is twos complement for the AD7863-10 and
AD7863-3. Output coding is straight (natural) binary for the AD7863-2.
9
–
15
16
17
DB6
–
DB0
AGND
V
B2
18
V
A2
19
V
REF
20
A0
21
22
CS
RD
23
BUSY
24
25
V
DD
V
A1
26
V
B1
27
28
AGND
DB13
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD7863
DB1
DB2
DB3
DB4
DB5
DB6
CONVST
DB12
DB11
DB10
DB9
DGND
DB7
DB8
V
A2
V
REF
A0
CS
DB13
AGND
V
B1
V
A1
V
DD
RD
BUSY
V
B2
AGND
DB0
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| AD7863ARSZ-101 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Simultaneous Sampling Dual 175 kSPS 14-Bit ADC |
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