Overview
The DS2450S 1-Wire Quad A/D Converter, produced by Maxim Integrated (now part of Analog Devices Inc.), is a sophisticated analog-to-digital converter designed for measuring analog voltages over the 1-Wire bus. This device is based on a successive-approximation analog to digital converter with a four-to-one analog multiplexer, allowing it to handle four high-impedance inputs. Each input channel has its own register set to store the input voltage range, resolution, and alarm threshold values, as well as flags to enable participation in conditional searches if the input voltage exceeds specified ranges.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Maxim Integrated (Analog Devices Inc.) |
| Package/Case | SOIC-8 |
| Number of Channels | 4 |
| Architecture | SAR (Successive Approximation) |
| Conversion Rate | 1 KSPS |
| Resolution | Up to 16 bits |
| Input Type | Single-Ended |
| Interface Type | 1-Wire, Serial |
| Operating Supply Voltage | 5 V |
| Maximum Operating Temperature | +85°C |
| Minimum Operating Temperature | -40°C |
| Voltage Reference | Internal |
Key Features
- Four high-impedance inputs to measure analog voltages over the 1-Wire bus.
- User programmable input range (2.56V, 5.12V), resolution (1 to 16 bits), and alarm thresholds.
- 5V single supply operation with very low power consumption: 2.5 mW active, 25 µW idle.
- Built-in multidrop controller allows multiple DS2450s to be identified and operated on a common 1-Wire bus.
- Responds to Conditional Search if the analog voltage crosses the alarm thresholds.
- Channels not used as analog inputs can serve as open-drain digital outputs for closed-loop control.
- Directly connects to a single port pin of a microprocessor and communicates at up to 16.3 kbits per second, with overdrive mode boosting communication speed to 142 kbits per second.
- On-chip 16-bit CRC-generator for safeguarding data transfers.
- Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC) for absolute traceability.
- Compact, low-cost 8-pin SOIC surface mount package.
Applications
The DS2450S is versatile and can be used in various applications, including:
- Industrial automation and control systems where multiple sensors need to be monitored over a single bus.
- Environmental monitoring systems, such as temperature and humidity sensors.
- Medical devices requiring precise analog-to-digital conversion.
- Automotive systems for monitoring various analog parameters.
- Smart home and IoT devices that require low-power, multi-channel analog-to-digital conversion.
Q & A
- What is the primary function of the DS2450S?
The DS2450S is a 1-Wire Quad A/D Converter designed to measure analog voltages over the 1-Wire bus.
- How many input channels does the DS2450S have?
The DS2450S has four high-impedance input channels.
- What is the resolution range of the DS2450S?
The resolution can be programmed from 1 to 16 bits.
- What is the operating supply voltage of the DS2450S?
The DS2450S operates on a single 5V supply.
- Can the DS2450S operate in overdrive mode?
- How does the DS2450S ensure data integrity?
The DS2450S uses an on-chip 16-bit CRC-generator to safeguard data transfers.
- What is the operating temperature range of the DS2450S?
The operating temperature range is from -40°C to +85°C.
- Can channels not used as analog inputs be used for other purposes?
- How is the device powered?
The device can be powered either through the 1-Wire bus or through its VCC pin.
- What is the significance of the 64-bit registration number?
The 64-bit registration number ensures absolute traceability and unique identification of each device.
