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參數資料
| 型號： | AD7893AR-5 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | RECTIFIER SCHOTTKY SINGLE 5A 35V 175A-ifsm 0.55V-vf 0.5mA-ir TO220AC 50/TUBE |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數： | 4/12頁 |
| 文件大小： | 340K |
| 代理商： | AD7893AR-5 |
AD7893
REV. E
–4–
PIN FUNCTION DESCRIPTION
Pin
No.
Pin
Mnemonic
Description
1
REF IN
Voltage Reference Input. An external reference source should be connected to this pin to provide the refer-
ence voltage for the AD7893’s conversion process. The REF IN input is buffered on-chip. The nominal ref-
erence voltage for correct operation of the AD7893 is +2.5 V.
2
V
IN
Analog Input Channel. The analog input range is
±
10 V (AD7893-10),
±
2.5 V (AD7893-3), 0 V to +5 V
(AD7893-5) and 0 V to +2.5 V (AD7893-2).
3
AGND
Analog Ground. Ground reference for track/hold, comparator and DAC.
4
SCLK
Serial Clock Input. An external serial clock is applied to this input to obtain serial data from the AD7893. A
new serial data bit is clocked out on the rising edge of this serial clock, and data is valid on the falling edge.
The serial clock input should be taken low at the end of the serial data transmission.
5
SDATA
Serial Data Output. Serial data from the AD7893 is provided at this output. The serial data is clocked out by
the rising edge of SCLK and is valid on the falling edge of SCLK. Sixteen bits of serial data are provided
with four leading zeros followed by the 12 bits of conversion data. On the sixteenth falling edge of SCLK, the
SDATA line is disabled (three-stated). Output data coding is twos complement for the AD7893-10 and
AD7893-3, straight binary for the AD7893-2 and AD7893-5.
6
DGND
Digital Ground. Ground reference for digital circuitry.
7
CONVST
Convert Start. Edge-triggered logic input. On the falling edge of this input, the serial clock counter is reset to
zero. On the rising edge of this input, the track/hold goes into its hold mode and conversion is initiated.
8
V
DD
Positive supply voltage, +5 V
±
5%.
PIN CONFIGURATION
DIP and SOIC
1
2
3
4
8
7
6
5
REF IN
V
IN
AGND
SCLK
DGND
SDATA
V
DD
CONVST
AD7893
TOP VIEW
(NOT TO SCALE)
ORDERING GUIDE
Temperature
Range
Linearity
Error
Package
Options*
Model
SNR
AD7893AN-2
AD7893BN-2
AD7893AR-2
AD7893BR-2
AD7893SQ-2
–40
°
C to +85
°
C
–40
°
C
to +85
°
C
–40
°
C to +85
°
C
–40
°
C
to +85
°
C
–55
°
C to +125
°
C
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
70 dB
72 dB
70 dB
72 dB
70 dB
N-8
N-8
SO-8
SO-8
Q-8
AD7893AN-5
AD7893BN-5
AD7893AR-5
AD7893BR-5
AD7893SQ-5
–40
°
C
to +85
°
C
–40
°
C
to +85
°
C
–40
°
C
to +85
°
C
–40
°
C
to +85
°
C
–55
°
C to +125
°
C
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
70 dB
72 dB
70 dB
72 dB
70 dB
N-8
N-8
SO-8
SO-8
Q-8
AD7893AN-10 –40
°
C to +85
°
C
AD7893BN-10
AD7893AR-10
AD7893BR-10
AD7893SQ-10
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1 LSB
70 dB
72 dB
70 dB
72 dB
70 dB
N-8
N-8
SO-8
SO-8
Q-8
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
–40
°
C
to +85
°
C
AD7893AR-3
70 dB
SO-8
*N = Plastic DIP, Q = Cerdip, SO = SOIC.
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