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參數(shù)資料
| 型號： | AD9057BRSZ-RL40 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 8BIT 40MSPS 20-SSOP T/R |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 40M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 260mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
REV. D
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
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ORDERING GUIDE
Temperature
Model
Range
Package Option
*
AD9057BRS-40
–40
∞C to +85∞C RS-20
AD9057BRS-60
–40
∞C to +85∞C RS-20
AD9057BRS-80
–40
∞C to +85∞C RS-20
AD9057/PCB
25
∞CEvaluation Board
*RS = Shrink Small Outline Package (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
mF
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
W 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–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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