Datasheet AD7829-1 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC |
| Pages / Page | 21 / 10 — AD7829-1. Track/Hold Acquisition Time. PSR (Power Supply Rejection) |
| File Format / Size | PDF / 364 Kb |
| Document Language | English |
AD7829-1. Track/Hold Acquisition Time. PSR (Power Supply Rejection)
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Text Version of Document
AD7829-1 Track/Hold Acquisition Time
It means that the user must wait for the duration of the The time required for the output of the track/hold amplifier to track/hold acquisition time after a channel change/step input reach its final value, within ±1/2 LSB, after the point at which change to VIN before starting another conversion, to ensure that the track/hold returns to track mode. This happens approxi- the part operates to specification. mately 120 ns after the falling edge of CONVST.
PSR (Power Supply Rejection)
It also applies to situations where a change in the selected input Variations in power supply affect the full-scale transition channel takes place or where there is a step input change on the but not the converter’s linearity. Power supply rejection is the input voltage applied to the selected VIN input of the AD7829-1. maximum change in the full-scale transition point due to a change in power supply voltage from the nominal value. Rev. 0 | Page 9 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY CIRCUIT INFORMATION CIRCUIT DESCRIPTION TYPICAL CONNECTION DIAGRAM ADC TRANSFER FUNCTION ANALOG INPUT POWER-UP TIMES POWER VS. THROUGHPUT OPERATING MODES PARALLEL INTERFACE MICROPROCESSOR INTERFACING AD7829-1 TO 8051 AD7829-1 TO PIC16C6x/PIC16C7x AD7829-1 TO ADSP-21xx INTERFACING MULTIPLEXER ADDRESS INPUTS OUTLINE DIMENSIONS ORDERING GUIDE
It means that the user must wait for the duration of the The time required for the output of the track/hold amplifier to track/hold acquisition time after a channel change/step input reach its final value, within ±1/2 LSB, after the point at which change to VIN before starting another conversion, to ensure that the track/hold returns to track mode. This happens approxi- the part operates to specification. mately 120 ns after the falling edge of CONVST.
PSR (Power Supply Rejection)
It also applies to situations where a change in the selected input Variations in power supply affect the full-scale transition channel takes place or where there is a step input change on the but not the converter’s linearity. Power supply rejection is the input voltage applied to the selected VIN input of the AD7829-1. maximum change in the full-scale transition point due to a change in power supply voltage from the nominal value. Rev. 0 | Page 9 of 20 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS TIMING DIAGRAM ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY CIRCUIT INFORMATION CIRCUIT DESCRIPTION TYPICAL CONNECTION DIAGRAM ADC TRANSFER FUNCTION ANALOG INPUT POWER-UP TIMES POWER VS. THROUGHPUT OPERATING MODES PARALLEL INTERFACE MICROPROCESSOR INTERFACING AD7829-1 TO 8051 AD7829-1 TO PIC16C6x/PIC16C7x AD7829-1 TO ADSP-21xx INTERFACING MULTIPLEXER ADDRESS INPUTS OUTLINE DIMENSIONS ORDERING GUIDE
