Datasheet AD7760 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | 2.5 MSPS, 24-Bit, 100 dB Sigma-Delta ADC with On-Chip Buffer |
| Páginas / Página | 37 / 6 — Parameter. Test Conditions/Comments. Specification. Unit |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 866 Kb |
| Idioma del documento | Inglés |
Parameter. Test Conditions/Comments. Specification. Unit
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AD7760
Parameter Test Conditions/Comments Specification Unit
ANALOG INPUT Differential Input Voltage VIN(+) – VIN(−), VREF = 2.5 V ±2 V p-p VIN(+) – VIN(−), VREF = 4.096 V ±3.25 V p-p Input Capacitance At internal buffer inputs 5 pF typ At modulator inputs 55 pF typ REFERENCE INPUT/OUTPUT VREF Input Voltage VDD3 = 3.3 V ± 5% +2.5 V max VDD3 = 5 V ± 5% +4.096 V max VREF Input DC Leakage Current ±6 µA max VREF Input Capacitance 5 pF max POWER DISSIPATION Total Power Dissipation Normal mode 958 mW max Low power mode 661 mW max Standby Mode Clock stopped 6.35 mW max POWER REQUIREMENTS AVDD1 (Modulator Supply) ±5% +2.5 V AVDD2 (General Supply) ±5% +5 V AVDD3 (Differential Amplifier Supply) +3.15/+5.25 V min/max AVDD4 (Reference Buffer Supply) +3.15/+5.25 V min/max DVDD ±5% +2.5 V VDRIVE +1.65/+2.7 V min/max Normal Mode AIDD1 (Modulator) 49/51 mA typ/max AIDD2 (General)3 40/42 mA typ/max AIDD4 (Reference Buffer) AVDD4 = 5 V 34/36 mA typ/max Low Power Mode AIDD1 (Modulator) 26/28 mA typ/max AIDD2 (General)3 20/23 mA typ/max AIDD4 (Reference Buffer) AVDD4 = 5 V 9/10 mA typ/max AIDD3 (Differential Amplifier) AVDD3 = 5 V, both modes 41/44 mA typ/max DIDD Both modes 63/70 mA typ/max DIGITAL I/O MCLK Input Amplitude4 5 V typ Input Capacitance 7.3 pF typ Input Leakage Current ±5 μA max Three-State Leakage Current (D15:D0) ±5 μA max VINH 0.7 × VDRIVE V min VINL 0.3 × VDRIVE V max V 5 OH 1.5 V min V 6 OH 2.4 V typ V 4 OL 0.1 V max 1 See the Terminology section. 2 SNR specifications in decibels are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 3 Current scales with ICLK frequency. See the Typical Performance Characteristics section. 4 Although the AD7760 can function with an MCLK amplitude of less than 5 V, this is the recommended amplitude to achieve the performance as stated. 5 Tested using the minimum VDRIVE voltage of 1.65 V with a 400 µA load current. 6 Tested using VDRIVE = 2.5 V with a 400 μA load current. Rev. A | Page 5 of 36
Parameter Test Conditions/Comments Specification Unit
ANALOG INPUT Differential Input Voltage VIN(+) – VIN(−), VREF = 2.5 V ±2 V p-p VIN(+) – VIN(−), VREF = 4.096 V ±3.25 V p-p Input Capacitance At internal buffer inputs 5 pF typ At modulator inputs 55 pF typ REFERENCE INPUT/OUTPUT VREF Input Voltage VDD3 = 3.3 V ± 5% +2.5 V max VDD3 = 5 V ± 5% +4.096 V max VREF Input DC Leakage Current ±6 µA max VREF Input Capacitance 5 pF max POWER DISSIPATION Total Power Dissipation Normal mode 958 mW max Low power mode 661 mW max Standby Mode Clock stopped 6.35 mW max POWER REQUIREMENTS AVDD1 (Modulator Supply) ±5% +2.5 V AVDD2 (General Supply) ±5% +5 V AVDD3 (Differential Amplifier Supply) +3.15/+5.25 V min/max AVDD4 (Reference Buffer Supply) +3.15/+5.25 V min/max DVDD ±5% +2.5 V VDRIVE +1.65/+2.7 V min/max Normal Mode AIDD1 (Modulator) 49/51 mA typ/max AIDD2 (General)3 40/42 mA typ/max AIDD4 (Reference Buffer) AVDD4 = 5 V 34/36 mA typ/max Low Power Mode AIDD1 (Modulator) 26/28 mA typ/max AIDD2 (General)3 20/23 mA typ/max AIDD4 (Reference Buffer) AVDD4 = 5 V 9/10 mA typ/max AIDD3 (Differential Amplifier) AVDD3 = 5 V, both modes 41/44 mA typ/max DIDD Both modes 63/70 mA typ/max DIGITAL I/O MCLK Input Amplitude4 5 V typ Input Capacitance 7.3 pF typ Input Leakage Current ±5 μA max Three-State Leakage Current (D15:D0) ±5 μA max VINH 0.7 × VDRIVE V min VINL 0.3 × VDRIVE V max V 5 OH 1.5 V min V 6 OH 2.4 V typ V 4 OL 0.1 V max 1 See the Terminology section. 2 SNR specifications in decibels are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 3 Current scales with ICLK frequency. See the Typical Performance Characteristics section. 4 Although the AD7760 can function with an MCLK amplitude of less than 5 V, this is the recommended amplitude to achieve the performance as stated. 5 Tested using the minimum VDRIVE voltage of 1.65 V with a 400 µA load current. 6 Tested using VDRIVE = 2.5 V with a 400 μA load current. Rev. A | Page 5 of 36