Overview
The ADADC85SZ-12/883B is a high-speed, 12-bit successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the ADADC84/ADADC85 series, known for its integrated clock, reference, and comparator, making it a complete ADC solution without the need for external components. The hybrid IC design combines MSI digital and linear monolithic chips with a 12-bit monolithic DAC, ensuring high performance, versatility, and reliability. The ADADC85SZ-12/883B is particularly suited for severe and aerospace applications due to its guaranteed performance over a wide temperature range of –55°C to +125°C and its compliance with MIL-STD-883B processing standards.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | Less than 10 µs (for 12-bit versions) |
| Linearity Error | ±0.012% FSR max |
| Gain Temperature Coefficient (TC) | Below 15 ppm/°C at 25°C |
| Power Dissipation | Typical 880 mW |
| Temperature Range | –55°C to +125°C (ADADC85S) |
| Analog Input Ranges | ±2.5 V, ±5 V, ±10 V, 0 V to +5 V, 0 V to +10 V |
| Reference Voltage | 6.3 V ±0.1% and ±10 ppm/°C typical TC |
| Digital Compatibility | DTL and TTL compatible |
| Data Output | Negative-true, parallel form |
Key Features
- Complete 12-bit ADC with internal clock, reference, and comparator.
- Fast successive approximation conversion rates (less than 10 µs for 12-bit versions).
- Internal buried Zener reference for long-term stability and low gain TC.
- Low power dissipation (typical 880 mW).
- High reliability with industry-standard pinout and MIL-STD-883B processing available.
- Versatile analog input signal ranges (±2.5 V, ±5 V, ±10 V, 0 V to +5 V, 0 V to +10 V).
- Precision +6.3 V reference available for external applications.
- Monotonic operation of the feedback DAC ensures no missing codes over the specified temperature ranges.
- Input buffer amplifier adds flexibility and value.
Applications
The ADADC85SZ-12/883B is suitable for a variety of applications, particularly those requiring high-speed and high-accuracy analog-to-digital conversion. Key application areas include:
- Aerospace and defense systems due to its wide temperature range and MIL-STD-883B compliance.
- Industrial control systems where high reliability and precision are crucial.
- Medical devices that require accurate and fast data conversion.
- Automotive systems, especially in environments with extreme temperatures.
- High-performance data acquisition systems.
Q & A
- What is the resolution of the ADADC85SZ-12/883B?
The ADADC85SZ-12/883B has a resolution of 12 bits.
- What is the typical conversion time for the ADADC85SZ-12/883B?
The typical conversion time is less than 10 µs for the 12-bit versions.
- What is the maximum linearity error of the ADADC85SZ-12/883B?
The maximum linearity error is ±0.012% FSR max.
- What is the temperature range for the ADADC85SZ-12/883B?
The device is specified for operation from –55°C to +125°C.
- Is the ADADC85SZ-12/883B compatible with DTL and TTL logic?
- What are the available analog input ranges for the ADADC85SZ-12/883B?
The available analog input ranges include ±2.5 V, ±5 V, ±10 V, 0 V to +5 V, and 0 V to +10 V.
- What is the precision of the internal reference voltage?
The internal reference voltage is 6.3 V ±0.1% and ±10 ppm/°C typical TC.
- Is the ADADC85SZ-12/883B suitable for aerospace applications?
- Does the ADADC85SZ-12/883B have an input buffer amplifier?
- What is the power dissipation of the ADADC85SZ-12/883B?
The typical power dissipation is 880 mW.
