ADC0820CCN Electronic IC Chips 8-Bit High Speed Compatible A/D Converter
electronic integrated circuit
,linear integrated circuits
ADC0820
8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function
General Description
By using a half-flash conversion technique, the 8-bit ADC0820 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 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 has been designed to appear as a memory location or I/O port without the need for external interfacing logic.
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 ±1⁄2 LSB and ± 1 LSB
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 T2 L 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" standard width 20-pin DIP
• 20-pin molded chip carrier package
• 20-pin small outline package
• 20-pin shrink small outline package (SSOP)
Connection and Functional Diagrams
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage (VCC) 10V
Logic Control Inputs −0.2V to VCC +0.2V
Voltage at Other Inputs and Output −0.2V to VCC +0.2V
Storage Temperature Range −65˚C to +150˚C
Package Dissipation at TA = 25˚C 875 mW
Input Current at Any Pin (Note 5) 1 mA
Package Input Current (Note 5) 4 mA
ESD Susceptability (Note 9) 1200V
Lead Temp. (Soldering, 10 sec.)
Dual-In-Line Package (plastic) 260˚C
Dual-In-Line Package (ceramic) 300˚C
Surface Mount Package
Vapor Phase (60 sec.) 215˚C
Infrared (15 sec.) 220˚C
Stock Offer (Hot Sell)
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| L4960 | 3257 | ST | 08+ | TO220-5 |
| MSP430F1222IDW | 6617 | TI | 15+ | SOP |
| LM431ACZ | 10000 | FSC | 13+ | TO-92 |
| MJD127T4 | 14000 | ON | 14+ | TO-263 |
| A2C56211 | 3660 | 14+ | SOP20 | |
| LMC555CMM | 5706 | NSC | 14+ | MSOP-8 |
| MUR2100ERLG | 25000 | ON | 16+ | DO-41 |
| MX25L4006EM1I-12G | 10000 | MXIC | 16+ | SOP |
| LM2674MX-ADJ | 1892 | NSC | 12+ | SOIC-8 |
| MLX10407 | 3100 | MELEXIS | 14+ | SOP |
| LM324APWR | 10000 | TI | 12+ | TSSOP-14 |
| M27C512-10C1 | 3984 | ST | 10+ | PLCC |
| NTR4502PT1G | 38000 | ON | 16+ | SOT-23 |
| LTC1763CS8 | 6110 | LT | 15+ | SOP |
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| LP2986AIMX-3.3 | 2463 | NSC | 14+ | SOP-8 |
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| PIC10F220T-I/OT | 9050 | MICROCHIP | 16+ | SOT |
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| LM2940T-9.0 | 3179 | NSC | 12+ | TO-220 |
| LM399H | 3026 | NSC | 14+ | CAN |
| MMBF5460 | 30000 | FAIRCHILD | 16+ | SOT-23 |
| OB2201CCPA | 5480 | ON-BRIGHT | 16+ | SOP-8 |
| LMV339IPWR | 4737 | TI | 15+ | TSSOP-14 |
| M1MA142WKT1 | 40000 | ON | 16+ | SOT |
| MJE350G | 10000 | ON | 16+ | TO-126 |
| MT48LC64M8A2P-75 | 7338 | MICRON | 16+ | TSOP |
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