Datasheet AD7656-1, AD7657-1, AD7658-1 (Analog Devices) - 10

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AD7656-1/AD7657-1/AD7658-1 Data Sheet ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted. Stresses above those listed under Absolute Maximum Ratings
Table 5.
may cause permanent damage to the device. This is a stress
Parameter Rating
rating only; functional operation of the device at these or any other conditions above those indicated in the operational VDD to AGND, DGND −0.3 V to +16.5 V section of this specification is not implied. Exposure to absolute VSS to AGND, DGND +0.3 V to −16.5 V maximum rating conditions for extended periods may affect VDD to AVCC VCC − 0.3 V to +16.5 V device reliability. AVCC to AGND, DGND −0.3 V to +7 V DVCC to AVCC −0.3 V to AVCC + 0.3 V
THERMAL RESISTANCE
DVCC to DGND, AGND −0.3 V to +7 V θJA is specified for the worst-case conditions, that is, a device AGND to DGND −0.3 V to +0.3 V soldered in a circuit board for surface-mount packages. These VDRIVE to DGND −0.3 V to DVCC + 0.3 V specifications apply to a 4-layer board. Analog Input Voltage to AGND1 VSS − 0.3 V to VDD + 0.3 V Digital Input Voltage to DGND −0.3 V to VDRIVE + 0.3 V
Table 6. Thermal Resistance
Digital Output Voltage to DGND −0.3 V to VDRIVE + 0.3 V
Package Type θJA θJC Unit
REFIN/REFOUT to AGND −0.3 V to AVCC + 0.3 V 64-Lead LQFP 45 11 °C/W Input Current to Any Pin Except Supplies2 ±10 mA
ESD CAUTION
Operating Temperature Range B Version −40°C to +85°C Y Version −40°C to +125°C Storage Temperature Range −65°C to +150°C Junction Temperature 150°C Pb/Sn Temperature, Soldering Reflow (10 sec to 30 sec) 240(+0)°C Pb-Free Temperature, Soldering Reflow 260(+0)°C ESD 1.5 kV 1 If the analog inputs are driven from alternative VDD and VSS supply circuitry, a 240 Ω series resistor should be placed on the analog inputs and Schottky diodes should be placed in series with the VDD and VSS supplies of the AD7656-1/AD7657-1/AD7658-1. 2 Transient currents of up to 100 mA do not cause SCR latch-up. Rev. D | Page 10 of 32 Document Outline Features Applications Functional Block Diagram General Description Product Highlights Table of Contents Revision History Specifications AD7656-1 AD7657-1 AD7658-1 Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Track-and-Hold Amplifiers Analog Input ADC Transfer Function Internal/External Reference Typical Connection Diagram Driving the Analog Inputs Interface Options Parallel Interface (SER/PAR SEL = 0) Software Selection of ADCs Changing the Analog Input Range (H/S SEL = 0) Changing the Analog Input Range (H/S SEL = 1) Serial Interface (SER/PAR SEL = 1) Serial Read Operation Daisy-Chain Mode (DCEN = 1, SER/ SEL = 1) Standby/Partial Power-Down Modes of Operation (SER/PAR SEL = 0 or 1) Application Hints Layout Power Supply Configuration Outline Dimensions Ordering Guide