Datasheet AD9057 (Analog Devices) - 5

AD9057 ABSOLUTE MAXIMUM RATINGS* PIN CONFIGURATION
VD, VDD . 7 V Analog Inputs . –0.5 V to VD + 0.5 V Digital Inputs . –0.5 V to V
PWRDN 1 20 D0 (LSB)
DD + 0.5 V VREF Input . –0.5 V to V
VREF OUT 2 19 D1
D + 0.5 V Digital Output Current . 20 mA
VREF IN 3 18 D2
Operating Temperature . –55∞C to +125∞C
GND 4 17 D3 AD9057
Storage Temperature . –65∞C to +150∞C
V 5 D TOP VIEW 16 GND
Maximum Junction Temperature . 150∞C
(Not to Scale) BIAS OUT 6 15 VDD
Maximum Case Temperature . 150∞C
AIN 7 14 D4 V 8 D 13 D5
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
GND 9 12 D6
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
ENCODE 10 11 D7 (MSB)
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ORDERING GUIDE PIN FUNCTION DESCRIPTIONS Temperature Pin No. Mnemonic Function Model Range Package Option*
1 PWRDN Power-Down Function Select; AD9057BRS-40 –40∞C to +85∞C RS-20 Logic High for Power-Down AD9057BRS-60 –40∞C to +85∞C RS-20 Mode (Digital Outputs Go to AD9057BRS-80 –40∞C to +85∞C RS-20 High Impedance State). AD9057/PCB 25∞C Evaluation Board 2 VREF OUT Internal Reference Output *RS = Shrink Small Outline Package (SSOP). (2.5 V typ); Bypass with 0.1 mF to Ground.
Table I. Digital Coding (VREF = 2.5 V)
3 VREF IN Reference Input for ADC (2.5 V typ, ± 10%).
Analog Input Voltage Level Digital Output
4, 9, 16 GND Ground (Analog/Digital). 3.0 V Positive Full Scale 1111 1111 5, 8 VD Analog 5 V Power Supply. 2.502 V Midscale +1/2 LSB 1000 0000 6 BIAS OUT Bias Pin for AC Coupling 2.498 V Midscale –1/2 LSB 0111 1111 (1 kW to REF IN). 2.0 V Negative Full Scale 0000 0000 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.
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
WARNING!
the AD9057 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
ESD SENSITIVE DEVICE
recommended to avoid performance degradation or loss of functionality. –4– REV. D Document Outline FEATURES APPLICATIONS PRODUCT DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS Typical Performance Characteristics THEORY OF OPERATION USING THE AD9057 Analog Inputs Voltage Reference Digital Logic (5 V/3 V Systems) Timing Power Dissipation APPLICATIONS Evaluation Board OUTLINE DIMENSIONS Revision History