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AD9057 데이터시트(PDF) 4 Page - Analog Devices

부품명 AD9057
상세설명  8-Bit 40 MSPS/50 MSPS/80 MSPS Converter
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홈페이지  http://www.analog.com
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AD9057 데이터시트(HTML) 4 Page - Analog Devices

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REV. C
AD9057
–4–
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD9057 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
ABSOLUTE MAXIMUM RATINGS
VD, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . –0.5 V to VD + 0.5 V
Digital Inputs . . . . . . . . . . . . . . . . . . . –0.5 V to VDD + 0.5 V
VREF Input . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VD + 0.5 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating Temperature . . . . . . . . . . . . . . . . –55
°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65
°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . 150
°C
Maximum Case Temperature . . . . . . . . . . . . . . . . . . . 150
°C
ORDERING GUIDE
Temperature
Model
Range
Package Option
*
AD9057BRS–40, –60, –80
–40
°C to +85°C RS-20
AD9057/PCB
25
°C
Evaluation Board
*RS = Shrink Small Outline (SSOP).
Table I. Digital Coding (VREF = 2.5 V)
Analog Input
Voltage Level
Digital Output
3.0 V
Positive Full Scale
1111 1111
2.502 V
Midscale +1/2 LSB
1000 0000
2.498 V
Midscale –1/2 LSB
0111 1111
2.0 V
Negative Full Scale
0000 0000
PIN FUNCTION DESCRIPTIONS
Pin No.
Mnemonic
Function
1
PWRDN
Power-Down Function Select;
Logic HIGH for Power-Down
Mode (Digital Outputs Go to
High Impedance State).
2
VREF OUT
Internal Reference Output
(2.5 V typ); Bypass with 0.1
µF
to Ground.
3
VREF IN
Reference Input for ADC (2.5 V
typ,
±10%)
4, 9, 16
GND
Ground (Analog/Digital)
5, 8
VD
Analog 5 V Power Supply
6
BIAS OUT
Bias Pin for AC Coupling
(1 k
Ω to REF IN)
7
AIN
Analog Input for ADC
10
ENCODE
Encode Clock for ADC (ADC
Samples on Rising Edge of
ENCODE)
11–14, 17–20
D7–D4, D3–D0
Digital Outputs of ADC
15
VDD
Digital Output Power Supply;
Nominally 3 V to 5
V.
PIN CONFIGURATION
14
13
12
11
17
16
15
20
19
18
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
PWRDN
D3
D2
D1
D0 (LSB)
VREF OUT
VREF IN
GND
AD9057
D4
VDD
GND
VD
BIAS OUT
AIN
VD
GND
ENCODE
D7 (MSB)
D6
D5


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