Overview
The AD2S44-TM11B, produced by Analog Devices Inc., is a 14-bit dual channel, continuous tracking synchro/resolver-to-digital converter. This device is specifically designed for applications where space, weight, and cost are critical factors. It features two independent Type II servo loop tracking converters, utilizing a ratiometric conversion technique that provides excellent noise immunity and tolerance of long lead lengths. The converter is built using Analog Devices' proprietary BiMOS II process, combining the advantages of low power CMOS digital logic with bipolar linear circuits to ensure high reliability and low internal component count.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 14 bits | ||||
| Angular Accuracy | ±4.0 arc min | Over temperature range: −55°C to +125°C | |||
| Analog Input Voltage | 11.8 V | ||||
| Negative Supply Voltage | -15.0 V | V | Nominal | ||
| Time to Data Stable | 640 ns | ns | After negative edge of OE or change of level of A/B | ||
| Time to Data in High Impedance State | 200 ns | ns | After positive edge of OE |
Key Features
- Dual channel, continuous tracking synchro/resolver-to-digital converter with 14-bit resolution.
- Ratiometric conversion technique for excellent noise immunity and tolerance of long lead lengths.
- Utilizes Analog Devices' proprietary BiMOS II process, combining low power CMOS digital logic with bipolar linear circuits.
- High accuracy differential conditioning circuit for signal inputs, providing more than 74 dB of common-mode rejection.
- Independent reference inputs allowing different reference frequencies for each channel.
- Built-in test (BIT) facility for failsafe systems to indicate accurate tracking.
- Three-state transparent latch for data output, allowing data to be read without interrupting converter operation.
Applications
- Avionic systems
- Antenna monitoring
- CNC machine tooling
- Other applications where space, weight, and cost are at a premium.
Q & A
- What is the resolution of the AD2S44-TM11B?
The AD2S44-TM11B has a resolution of 14 bits. - What is the angular accuracy of the AD2S44-TM11B?
The angular accuracy is ±4.0 arc min over the temperature range of −55°C to +125°C. - What is the maximum analog input voltage for the AD2S44-TM11B?
The maximum analog input voltage is 11.8 V. - What is the nominal negative supply voltage for the AD2S44-TM11B?
The nominal negative supply voltage is -15.0 V. - How long does it take for the data to become stable after the negative edge of OE or change of level of A/B?
The data becomes stable 640 ns after the negative edge of OE or change of level of A/B. - What is the purpose of the built-in test (BIT) facility in the AD2S44-TM11B?
The built-in test (BIT) facility is used in failsafe systems to indicate whether the converter is tracking accurately. - Can different reference frequencies be used for each channel in the AD2S44-TM11B?
Yes, the AD2S44-TM11B allows for independent reference inputs, enabling different reference frequencies for each channel. - What type of process is used to manufacture the AD2S44-TM11B?
The AD2S44-TM11B is manufactured using Analog Devices' proprietary BiMOS II process. - What is the common-mode rejection of the differential conditioning circuit in the AD2S44-TM11B?
The differential conditioning circuit provides more than 74 dB of common-mode rejection. - In what types of applications is the AD2S44-TM11B commonly used?
The AD2S44-TM11B is commonly used in avionic systems, antenna monitoring, CNC machine tooling, and other applications where space, weight, and cost are critical.
