Datasheet AD7608 (Analog Devices) - 6

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Data Sheet AD7608 Parameter Test Conditions/Comments Min Typ Max Unit
ANALOG INPUT Input Voltage Ranges RANGE = 1 ±10 V RANGE = 0 ±5 V Analog Input Current 10 V; see Figure 28 5.4 µA 5 V; see Figure 28 2.5 µA Input Capacitance 7 5 pF Input Impedance 1 MΩ REFERENCE INPUT/OUTPUT Reference Input Voltage Range 2.475 2.5 2.525 V DC Leakage Current ±1 µA Input Capacitance7 REF SELECT = 1 7.5 pF Reference Output Voltage REFIN/REFOUT 2.49/ V 2.505 Reference Temperature Coefficient ±10 ppm/°C LOGIC INPUTS Input High Voltage (VINH) 0.9 × VDRIVE V Input Low Voltage (VINL) 0.1 × VDRIVE V Input Current (IIN) ±2 µA Input Capacitance (CIN)7 5 pF LOGIC OUTPUTS Output High Voltage (VOH) ISOURCE = 100 µA VDRIVE − 0.2 V Output Low Voltage (VOL) ISINK = 100 µA 0.2 V Floating-State Leakage Current ±1 ±20 µA Floating-State Output Capacitance7 5 pF Output Coding Twos complement CONVERSION RATE Conversion Time All eight channels included; see Table 3 4 µs Track-and-Hold Acquisition Time 1 µs Throughput Rate Per channel, all eight channels included 200 kSPS POWER REQUIREMENTS AVCC 4.75 5.25 V VDRIVE 2.3 5.25 V ITOTAL Digital inputs = 0 V or VDRIVE Normal Mode (Static) 16 22 mA Normal Mode (Operational)8 fSAMPLE = 200 kSPS 20 27 mA Standby Mode 5 8 mA Shutdown Mode 2 11 µA Power Dissipation Normal Mode (Static) 80 115.5 mW Normal Mode (Operational) 8 fSAMPLE = 200 kSPS 100 142 mW Standby Mode 25 42 mW Shutdown Mode 10 58 µW 1 Temperature range for B version is −40°C to +85°C. 2 See the Terminology section. 3 This specification applies when reading during a conversion or after a conversion. If reading during a conversion in parallel mode with VDRIVE = 5 V, SNR typically reduces by 1.5 dB and THD by 3 dB. 4 LSB means least significant bit. With ±5 V input range, 1 LSB = 38.14 µV. With ±10 V input range, 1 LSB = 76.29 µV. 5 These specifications include the full temperature range variation and contribution from the internal reference buffer but do not include the error contribution from the external reference. 6 Bipolar zero code error is calculated with respect to the analog input voltage. 7 Sample tested during initial release to ensure compliance. 8 Operational power/current figure includes contribution when running in oversampling mode. Rev. A | Page 5 of 32 Document Outline Features Applications Companion Products Functional Block Diagram Table of Contents Revision History General Description Specifications Timing Specifications Timing Diagrams Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Analog Input Analog Input Ranges Analog Input Impedance Analog Input Clamp Protection Analog Input Antialiasing Filter Track-and-Hold Amplifiers ADC Transfer Function Internal/External Reference External Reference Mode Internal Reference Mode Typical Connection Diagram Power-Down Modes Conversion Control Simultaneous Sampling on All Analog Input Channels Simultaneously Sampling Two Sets of Channels Digital Interface Parallel Interface (/SER SEL = 0) Serial Interface (/SER SEL = 1) Reading During Conversion Digital Filter Layout Guidelines Outline Dimensions Ordering Guide