Datasheet AD7678 (Analog Devices) - 8

link to page 18 link to page 8 link to page 8 link to page 8 link to page 8 link to page 8
AD7678 ABSOLUTE MAXIMUM RATINGS Table 5. AD7678 Absolute Maximum Ratings1 Parameter Rating 1.6mA IOL
Analog Inputs IN+2, IN–2, REF, REFBUFIN, REFGND AVDD + 0.3 V to to AGND AGND – 0.3 V
TO OUTPUT 1.4V PIN
Ground Voltage Differences
CL 60pF1
AGND, DGND, OGND ±0.3 V Supply Voltages
500

A IOH
AVDD, DVDD, OVDD –0.3 V to +7 V
1 IN SERIAL INTERFACE MODES,THE SYNC, SCLK, AND
AVDD to DVDD, AVDD to OVDD ±7 V
SDOUT TIMINGS ARE DEFINED WITH A MAXIMUM LOAD C
DVDD to OVDD –0.3 V to +7 V
L OF 10pF; OTHERWISE,THE LOAD IS 60pF MAXIMUM.
03084–0–002 Digital Inputs –0.3 V to DVDD + 0.3 V Figure 2. Load Circuit for Digital Interface Timing, Internal Power Dissipation3 700 mW SDOUT, SYNC, SCLK Outputs, CL = 10 pF Internal Power Dissipation4 2.5 W Junction Temperature 150°C Storage Temperature Range –65°C to +150°C
2V
Lead Temperature Range
0.8V tDELAY t
(Soldering 10 sec) 300°C
DELAY 2V 2V 0.8V 0.8V
03084–0–003 1Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional Figure 3. Voltage Reference Levels for Timing operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied.
ESD CAUTION
Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2See Analog Inputs section. 3Specification is for device in free air: 48-Lead LQFP: θJA = 91°C/W, θJC = 30°C/W. 4 Specification is for device in free air: 48-Lead LFCSP: θJA = 26°C/W. Rev. A | Page 7 of 28 Document Outline Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Definition of Specifications Integral Nonlinearity Error (INL) Differential Nonlinearity Error (DNL) Gain Error Zero Error Spurious-Free Dynamic Range (SFDR) Effective Number of Bits (ENOB) Total Harmonic Distortion (THD) Dynamic Range Signal-to-Noise Ratio (SNR) Signal-to-(Noise + Distortion) Ratio (S/[N+D]) Aperture Delay Transient Response Typical Performance Characteristics Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Power Supply Power Dissipation versus Throughput Conversion Control Digital Interface Parallel Interface Serial Interface Master Serial Interface Internal Clock Slave Serial Interface External Clock External Discontinuous Clock Data Read after Conversion External Clock Data Read during Conversion Microprocessor Interfacing SPI Interface (ADSP-219x) Application Hints Layout Evaluating the AD7678’s Performance Outline Dimensions Ordering Guide