Features and Benefits
- 8-/10-Bit ADC with 2.3 µs Conversion Time
- On-Chip Track and Hold
- Operating Supply Range: 2.7 V to 5.5 V
- 8-Bit Parallel Interface:
8-Bit + 2-Bit Read
- Analog Input Range: 0 V to VREF
- Reference Input Range: 1.2 V to VDD
- Specifications at 2.7 V–3.6 V and 5 V ± 10%
- Power Performance
- Normal Operation
10.5 mW, VDD = 3 V
- Automatic Power-Down
34.6 µW @ 1 kSPS, VDD = 3 V
The AD7813 is a high speed, microprocessor-compatible, 8-/10-bit analog-to-digital converter with a maximum through-put of 400 kSPS. The converter operates off a single +2.7 V to +5.5 V supply and contains a 2.3 ms successive approximation A/D converter, track/hold circuitry, on-chip clock oscillator and 8-bit wide parallel interface. The parallel interface is designed to allow easy interfacing to microprocessors and DSPs. The 10-bit conversion result is read by carrying out two 8-bit read operations. The first read operation accesses the 8 MSBs of the ADC conversion result and the second read accesses the 2 LSBs. Using only address decoding logic the AD7813 is easily mapped into the microprocessor address space.
When used in its power-down mode, the AD7813 automatically powers down at the end of a conversion and powers up at the start of a new conversion. This feature significantly reduces the power consumption of the part at lower throughput rates. The AD7813 can also operate in a high speed mode where the part is not powered down between conversions. In this mode of operation the part is capable of providing 400 kSPS throughput.
The part is available in a small, 16-pin, 0.3" wide, plastic dual-in- line package (DIP), in a 16-pin, 0.15" wide, narrow body small outline IC (SOIC) and in a 16-pin thin shrink small outline package (TSSOP).
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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