ADC0820-N Series

8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function

Catalog

8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function

Part	Architecture	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Configuration	Ratio - S/H:ADC	Reference Type	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Mounting Type	Input Type	Number of Inputs	Number of Bits	Package / Case	Package / Case [y]	Package / Case [y]	Supplier Device Package	Number of A/D Converters	Data Interface	Operating Temperature [Max]
Texas Instruments ADC0820CCWMX/NOPB	Flash	4.5 V	8 V	S/H-ADC	1:1	External	4.5 V	8 V	Surface Mount	Pseudo-Differential Single Ended	1	8	20-SOIC	0.295 in	7.5 mm	20-SOIC	1	Parallel	70 °C
Texas Instruments ADC0820CCWM/NOPB	Flash	4.5 V	8 V	S/H-ADC	1:1	External	4.5 V	8 V	Surface Mount	Pseudo-Differential Single Ended	1	8	20-SOIC	0.295 in	7.5 mm	20-SOIC	1	Parallel	70 °C
Texas Instruments ADC0820BCWMX/NOPB	Flash	4.5 V	8 V	S/H-ADC	1:1	External	4.5 V	8 V	Surface Mount	Pseudo-Differential Single Ended	1	8	20-SOIC	0.295 in	7.5 mm	20-SOIC	1	Parallel	70 °C

Catalog

8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function

Key Features

• Built-In Track-and-Hold FunctionNo Missing CodesNo External ClockingSingle Supply—5 VDCEasy Interface to All Microprocessors, or Operates Stand-AloneLatched TRI-STATE OutputLogic Inputs and Outputs Meet Both MOS and T2L Voltage Level SpecificationsOperates Ratiometrically or with any Reference Value Equal to or Less than VCC0V to 5V Analog Input Voltage Range with Single 5V SupplyNo Zero or Full-Scale Adjust RequiredOverflow Output Available for Cascading0.3 in. Standard Width 20-Pin PDIP20-Pin PLCC20-Pin SOICKey SpecificationsResolution: 8 BitsConversion Time2.5 µs Max (RD Mode)1.5 µs Max (WR-RD Mode)Low Power: 75 mW MaxTotal Unadjusted Error: ±½ LSB and ± 1 LSBAll trademarks are the property of their respective owners.Built-In Track-and-Hold FunctionNo Missing CodesNo External ClockingSingle Supply—5 VDCEasy Interface to All Microprocessors, or Operates Stand-AloneLatched TRI-STATE OutputLogic Inputs and Outputs Meet Both MOS and T2L Voltage Level SpecificationsOperates Ratiometrically or with any Reference Value Equal to or Less than VCC0V to 5V Analog Input Voltage Range with Single 5V SupplyNo Zero or Full-Scale Adjust RequiredOverflow Output Available for Cascading0.3 in. Standard Width 20-Pin PDIP20-Pin PLCC20-Pin SOICKey SpecificationsResolution: 8 BitsConversion Time2.5 µs Max (RD Mode)1.5 µs Max (WR-RD Mode)Low Power: 75 mW MaxTotal Unadjusted Error: ±½ LSB and ± 1 LSBAll trademarks are the property of their respective owners.

Description

By using a half-flash conversion technique, the 8-bit ADC0820-N CMOS A/D offers a 1.5 µs conversion time and dissipates only 75 mW of power. The half-flash technique consists of 32 comparators, a most significant 4-bit ADC and a least significant 4-bit ADC. The input to the ADC0820-N is tracked and held by the input sampling circuitry eliminating the need for an external sample-and-hold for signals moving at less than 100 mV/µs. For ease of interface to microprocessors, the ADC0820-N has been designed to appear as a memory location or I/O port without the need for external interfacing logic. By using a half-flash conversion technique, the 8-bit ADC0820-N CMOS A/D offers a 1.5 µs conversion time and dissipates only 75 mW of power. The half-flash technique consists of 32 comparators, a most significant 4-bit ADC and a least significant 4-bit ADC. The input to the ADC0820-N is tracked and held by the input sampling circuitry eliminating the need for an external sample-and-hold for signals moving at less than 100 mV/µs. For ease of interface to microprocessors, the ADC0820-N has been designed to appear as a memory location or I/O port without the need for external interfacing logic.