Datasheet AD7729 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 3 V, Dual Sigma-Delta ADC with Auxiliary DAC |
| Pages / Page | 17 / 4 — AD7729. Parameter. AD7729A. Units. Test Conditions/Comments. 50pF. 10k |
| File Format / Size | PDF / 175 Kb |
| Document Language | English |
AD7729. Parameter. AD7729A. Units. Test Conditions/Comments. 50pF. 10k
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Text Version of Document
AD7729 Parameter AD7729A Units Test Conditions/Comments
LOGIC INPUTS VINH, Input High Voltage VDD – 0.8 V min VINL, Input Low Voltage 0.8 V max IIH, Input Current 10 µA max CIN, Input Capacitance 10 pF max LOGIC OUTPUTS VOH, Output High Voltage VDD – 0.4 V min |IOUT| < 100 µA VOL, Output Low Voltage 0.4 V max |IOUT| < 100 µA IOZL, Low Level Output Three-State Leakage Current 10 µA max IOZH, High Level Output Three-State Leakage Current 10 µA max POWER SUPPLIES AVDD1, AVDD2 2.7/3.3 V min/max DVDD1, DVDD2 2.7/3.3 V min/max IDD See Table I NOTES 1Operating Temperature Range: –40°C to +105°C. Therefore, TMIN = –40°C and TMAX = +105°C. 2During power-down, the AUXDAC has an output resistance of 30 kΩ approximately to AGND. Specifications subject to change without notice.
C R L L 50pF 10k
V Figure 1. AUXDAC Load Equivalent Circuit
Table I. Current Summary (AVDD1 = AVDD2 = DVDD1 = DVDD2 = +3.3 V, RxPOWER1 = 0, RxPOWER0 = 1) Internal External Analog Digital Interface Total Current Current Current Current MCLK Conditions (typ) (typ) (typ) (max) BSE ASE ON Comments
ADCs On Only 4.2 3.4 4 13.5 1 0 YES REFOUT Enabled, BSCLK = MCLK AUXDAC On Only 2 0.86 0.1 3.4 0 1 YES REFOUT Disabled, ASCLK = MCLK/48 REFCAP On Only 0.7 0.0001 0.002 1.1 0 0 NO REFOUT Disabled REFCAP and REFOUT On Only 1 0.0001 0.002 1.7 0 0 NO REFOUT Enabled All Sections Off 0.0001 0.04 0.015 0.1 0 0 YES MCLK Active Levels Equal to 0 V and DVDD All Sections Off 0.0001 0.0001 0.005 0.05 0 0 NO Digital Inputs Static and Equal to 0 V or DVDD The above values are in mA. REV. 0 –3–
LOGIC INPUTS VINH, Input High Voltage VDD – 0.8 V min VINL, Input Low Voltage 0.8 V max IIH, Input Current 10 µA max CIN, Input Capacitance 10 pF max LOGIC OUTPUTS VOH, Output High Voltage VDD – 0.4 V min |IOUT| < 100 µA VOL, Output Low Voltage 0.4 V max |IOUT| < 100 µA IOZL, Low Level Output Three-State Leakage Current 10 µA max IOZH, High Level Output Three-State Leakage Current 10 µA max POWER SUPPLIES AVDD1, AVDD2 2.7/3.3 V min/max DVDD1, DVDD2 2.7/3.3 V min/max IDD See Table I NOTES 1Operating Temperature Range: –40°C to +105°C. Therefore, TMIN = –40°C and TMAX = +105°C. 2During power-down, the AUXDAC has an output resistance of 30 kΩ approximately to AGND. Specifications subject to change without notice.
C R L L 50pF 10k
V Figure 1. AUXDAC Load Equivalent Circuit
Table I. Current Summary (AVDD1 = AVDD2 = DVDD1 = DVDD2 = +3.3 V, RxPOWER1 = 0, RxPOWER0 = 1) Internal External Analog Digital Interface Total Current Current Current Current MCLK Conditions (typ) (typ) (typ) (max) BSE ASE ON Comments
ADCs On Only 4.2 3.4 4 13.5 1 0 YES REFOUT Enabled, BSCLK = MCLK AUXDAC On Only 2 0.86 0.1 3.4 0 1 YES REFOUT Disabled, ASCLK = MCLK/48 REFCAP On Only 0.7 0.0001 0.002 1.1 0 0 NO REFOUT Disabled REFCAP and REFOUT On Only 1 0.0001 0.002 1.7 0 0 NO REFOUT Enabled All Sections Off 0.0001 0.04 0.015 0.1 0 0 YES MCLK Active Levels Equal to 0 V and DVDD All Sections Off 0.0001 0.0001 0.005 0.05 0 0 NO Digital Inputs Static and Equal to 0 V or DVDD The above values are in mA. REV. 0 –3–
