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AD9057-80 Просмотр технического описания (PDF) - Analog Devices

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AD9057-80 8-Bit 40 MSPS/60 MSPS/80 MSPS A/D Converter ADI
Analog Devices ADI
AD9057-80 Datasheet PDF : 12 Pages
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AD9057
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 . . . . . . . . . . . . . . . . –55C to +125C
Storage Temperature . . . . . . . . . . . . . . . . . . –65C to +150C
Maximum Junction Temperature . . . . . . . . . . . . . . . . 150C
Maximum Case Temperature . . . . . . . . . . . . . . . . . . . 150C
*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
Model
Temperature
Range
Package Option*
AD9057BRS-40
AD9057BRS-60
AD9057BRS-80
AD9057/PCB
–40C to +85C RS-20
–40C to +85C RS-20
–40C to +85C RS-20
25C
Evaluation Board
*RS = Shrink Small Outline Package (SSOP).
Table I. Digital Coding (VREF = 2.5 V)
Analog Input
3.0 V
2.502 V
2.498 V
2.0 V
Voltage Level
Positive Full Scale
Midscale +1/2 LSB
Midscale –1/2 LSB
Negative Full Scale
Digital Output
1111 1111
1000 0000
0111 1111
0000 0000
PIN CONFIGURATION
PWRDN 1
20 D0 (LSB)
VREF OUT 2
19 D1
VREF IN 3
18 D2
GND 4 AD9057 17 D3
VD 5 TOP VIEW 16 GND
(Not to Scale)
BIAS OUT 6
15 VDD
AIN 7
14 D4
VD 8
GND 9
13 D5
12 D6
ENCODE 10
11 D7 (MSB)
PIN FUNCTION DESCRIPTIONS
Pin No.
1
Mnemonic
PWRDN
2
VREF OUT
3
4, 9, 16
5, 8
6
7
10
VREF IN
GND
VD
BIAS OUT
AIN
ENCODE
11–14, 17–20 D7–D0
15
VDD
Function
Power-Down Function Select;
Logic High for Power-Down
Mode (Digital Outputs Go to
High Impedance State).
Internal Reference Output
(2.5 V typ); Bypass with 0.1 mF
to Ground.
Reference Input for ADC (2.5 V
typ, ± 10%).
Ground (Analog/Digital).
Analog 5 V Power Supply.
Bias Pin for AC Coupling
(1 kW to REF IN).
Analog Input for ADC.
Encode Clock for ADC (ADC
Samples on Rising Edge of
Encode).
Digital Outputs of ADC.
Digital Output Power Supply;
Nominally 3 V to 5 V.
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
–4–
REV. D
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