ADC0820-N 8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function | TI.com

ADC0820-N (ACTIVE)

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

8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function  - ADC0820-N
 

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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.

Features

  • Built-In Track-and-Hold Function
  • No Missing Codes
  • No External Clocking
  • Single Supply—5 VDC
  • Easy Interface to All Microprocessors, or Operates Stand-Alone
  • Latched TRI-STATE Output
  • Logic Inputs and Outputs Meet Both MOS and T2L Voltage Level Specifications
  • Operates Ratiometrically or with any Reference Value Equal to or Less than VCC
  • 0V to 5V Analog Input Voltage Range with Single 5V Supply
  • No Zero or Full-Scale Adjust Required
  • Overflow Output Available for Cascading
  • 0.3 in. Standard Width 20-Pin PDIP
  • 20-Pin PLCC
  • 20-Pin SOIC

Key Specifications

  • Resolution: 8 Bits
  • Conversion Time
    • 2.5 µs Max (RD Mode)
    • 1.5 µs Max (WR-RD Mode)
  • Low Power: 75 mW Max
  • Total Unadjusted Error: ±½ LSB and ± 1 LSB

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
# Input Channels
Interface
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
Power Consumption (Typ) (mW)
Package Size: mm2:W x L (PKG)
Architecture
Input Type
Multi-Channel Configuration
Reference Mode
Features
Input Range (Max) (V)
Input Range (Min) (V)
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
INL (Max) (+/-LSB)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
Sample Rate (Max) (MSPS)
ADC0820-N ADC088S022 ADC088S052 ADC088S102
8     8     8     8    
658     200     500     1000    
1     8     8     8    
Parallel     Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
-40 to 85     -40 to 105     -40 to 105     -40 to 105    
SOIC     TSSOP     TSSOP     TSSOP    
1.70 | 1ku     1.20 | 1ku     1.30 | 1ku     1.50 | 1ku    
65     0.9     1.2     1.8    
20SOIC: 132 mm2: 10.3 x 12.8(SOIC)     16TSSOP: 32 mm2: 6.4 x 5(TSSOP)     16TSSOP: 32 mm2: 6.4 x 5(TSSOP)     16TSSOP: 32 mm2: 6.4 x 5(TSSOP)    
SAR     SAR     SAR     SAR    
Single-Ended     Single-Ended     Single-Ended     Single-Ended    
N/A     Multiplexed     Multiplexed     Multiplexed    
Ext     Supply     Supply     Supply    
N/A     N/A     N/A     N/A    
8     5.25     5.25     5.25    
0     0     0     0    
4.5     2.7     2.7     2.7    
8     5.25     5.25     5.25    
4.5     2.7     2.7     2.7    
8     5.25     5.25     5.25    
1     0.2     0.2     0.2    
  49.5     49.6     49.6    
  49.5     49.6     49.6    
  -70.1     -70.6     -71.2    
Catalog     Catalog     Catalog     Catalog    
0.658     0.2     0.5     1