Datasheet AD7791 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 24-Bit, Single-Channel, Ultra Low Power, Sigma Delta A/D Converter |
| 页数 / 页 | 21 / 5 — AD7791. Data Sheet. SPECIFICATIONS (continued)1. Parameter. AD7791B. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 532 Kb |
| 文件语言 | 英语 |
AD7791. Data Sheet. SPECIFICATIONS (continued)1. Parameter. AD7791B. Unit. Test Conditions/Comments
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AD7791 Data Sheet SPECIFICATIONS (continued)1 Parameter AD7791B Unit Test Conditions/Comments
REFERENCE INPUT (continued) Normal Mode Rejection2 @ 50 Hz, 60 Hz 65 dB min 73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 1004 @ 50 Hz 80 dB min 90 dB typ, 50 ± 1 Hz, FS[2:0] = 1014 @ 60 Hz 80 dB min 90 dB typ, 60 ± 1 Hz, FS[2:0] = 0114 Common Mode Rejection AIN = 1 V @ DC 100 dB typ FS[2:0] = 1004 @ 50 Hz, 60 Hz 110 dB typ 50 ± 1 Hz (FS[2:0] = 1014), 60 ± 1 Hz (FS[2:0] = 0114) LOGIC INPUTS All Inputs Except SCLK2 VINL, Input Low Voltage 0.8 V max VDD = 5 V 0.4 V max VDD = 3 V VINH, Input High Voltage 2.0 V min VDD = 3 V or 5 V SCLK Only (Schmitt-Triggered Input)2 VT(+) 1.4/2 V min/V max VDD = 5 V VT(–) 0.8/1.4 V min/V max VDD = 5 V VT(+) – VT(–) 0.3/0.85 V min/V max VDD = 5 V VT(+) 0.9/2 V min/V max VDD = 3 V VT(–) 0.4/1.1 V min/V max VDD = 3 V VT(+) - VT(–) 0.3/0.85 V min/V max VDD = 3 V Input Currents ±1 µA max VIN = VDD or GND Input Capacitance 10 pF typ All Digital Inputs LOGIC OUTPUTS VOH, Output High Voltage2 VDD – 0.6 V min VDD = 3 V, ISOURCE = 100 µA VOL, Output Low Voltage2 0.4 V max VDD = 3 V, ISINK = 100 µA VOH, Output High Voltage2 4 V min VDD = 5 V, ISOURCE = 200 µA VOL, Output Low Voltage2 0.4 V max VDD = 5 V, ISINK = 1.6 mA Floating-State Leakage Current ±1 µA max Floating-State Output Capacitance 10 pF typ Data Output Coding Offset Binary POWER REQUIREMENTS5 Power Supply Voltage VDD – GND 2.5/5.25 V min/max Power Supply Currents IDD Current6 75 µA max 65 µA typ, VDD = 3.6 V, Unbuffered Mode 145 µA max 130 µA typ, VDD = 3.6 V, Buffered Mode 80 µA max 73 µA typ, VDD = 5.25 V, Unbuffered Mode 160 µA max 145 µA typ, VDD = 5.25 V, Buffered Mode IDD (Power-Down Mode) 1 µA max 5 Digital inputs equal to VDD or GND. 6 The current consumption can be further reduced by using the ADC in one of the low power modes (see Table 14). Rev. A | Page 4 of 20 Document Outline AD7791—Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics On-chip Registers Communications Register (RS1, RS0 = 0, 0) Status Register (RS1, RS0 = 0, 0; Power-on/Reset = 0x8C) Mode Register (RS1, RS0 = 0, 1; Power-on/Reset = 0x02) Filter Register (RS1, RS0 = 1, 0; Power-on/Reset = 0x04) Data Register (RS1, RS0 = 1, 1; Power-on/Reset = 0x000000) ADC Circuit Information Overview Noise Performance Reduced Current Modes Digital Interface Single Conversion Mode Continuous Conversion Mode Continuous Read Mode Circuit Description Analog Input Channel Bipolar/Unipolar Configuration Data Output Coding Reference Input VDD Monitor Grounding and Layout Outline Dimensions Ordering Guide
AD7791 Data Sheet SPECIFICATIONS (continued)1 Parameter AD7791B Unit Test Conditions/Comments
REFERENCE INPUT (continued) Normal Mode Rejection2 @ 50 Hz, 60 Hz 65 dB min 73 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[2:0] = 1004 @ 50 Hz 80 dB min 90 dB typ, 50 ± 1 Hz, FS[2:0] = 1014 @ 60 Hz 80 dB min 90 dB typ, 60 ± 1 Hz, FS[2:0] = 0114 Common Mode Rejection AIN = 1 V @ DC 100 dB typ FS[2:0] = 1004 @ 50 Hz, 60 Hz 110 dB typ 50 ± 1 Hz (FS[2:0] = 1014), 60 ± 1 Hz (FS[2:0] = 0114) LOGIC INPUTS All Inputs Except SCLK2 VINL, Input Low Voltage 0.8 V max VDD = 5 V 0.4 V max VDD = 3 V VINH, Input High Voltage 2.0 V min VDD = 3 V or 5 V SCLK Only (Schmitt-Triggered Input)2 VT(+) 1.4/2 V min/V max VDD = 5 V VT(–) 0.8/1.4 V min/V max VDD = 5 V VT(+) – VT(–) 0.3/0.85 V min/V max VDD = 5 V VT(+) 0.9/2 V min/V max VDD = 3 V VT(–) 0.4/1.1 V min/V max VDD = 3 V VT(+) - VT(–) 0.3/0.85 V min/V max VDD = 3 V Input Currents ±1 µA max VIN = VDD or GND Input Capacitance 10 pF typ All Digital Inputs LOGIC OUTPUTS VOH, Output High Voltage2 VDD – 0.6 V min VDD = 3 V, ISOURCE = 100 µA VOL, Output Low Voltage2 0.4 V max VDD = 3 V, ISINK = 100 µA VOH, Output High Voltage2 4 V min VDD = 5 V, ISOURCE = 200 µA VOL, Output Low Voltage2 0.4 V max VDD = 5 V, ISINK = 1.6 mA Floating-State Leakage Current ±1 µA max Floating-State Output Capacitance 10 pF typ Data Output Coding Offset Binary POWER REQUIREMENTS5 Power Supply Voltage VDD – GND 2.5/5.25 V min/max Power Supply Currents IDD Current6 75 µA max 65 µA typ, VDD = 3.6 V, Unbuffered Mode 145 µA max 130 µA typ, VDD = 3.6 V, Buffered Mode 80 µA max 73 µA typ, VDD = 5.25 V, Unbuffered Mode 160 µA max 145 µA typ, VDD = 5.25 V, Buffered Mode IDD (Power-Down Mode) 1 µA max 5 Digital inputs equal to VDD or GND. 6 The current consumption can be further reduced by using the ADC in one of the low power modes (see Table 14). Rev. A | Page 4 of 20 Document Outline AD7791—Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics On-chip Registers Communications Register (RS1, RS0 = 0, 0) Status Register (RS1, RS0 = 0, 0; Power-on/Reset = 0x8C) Mode Register (RS1, RS0 = 0, 1; Power-on/Reset = 0x02) Filter Register (RS1, RS0 = 1, 0; Power-on/Reset = 0x04) Data Register (RS1, RS0 = 1, 1; Power-on/Reset = 0x000000) ADC Circuit Information Overview Noise Performance Reduced Current Modes Digital Interface Single Conversion Mode Continuous Conversion Mode Continuous Read Mode Circuit Description Analog Input Channel Bipolar/Unipolar Configuration Data Output Coding Reference Input VDD Monitor Grounding and Layout Outline Dimensions Ordering Guide