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AD7829BRU-1REEL7
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Product Detailed Parameters
- Description：IC ADC 8BIT 8CH 2MSPS 28-TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：8
- Sampling Rate (Per Second)：2M
- Number of Inputs：-
- Input Type：-
- Data Interface：Parallel
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：28-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：28-TSSOP
- Mounting Type：Surface Mount
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Overview
The AD7829BRU-1REEL7 is an 8-bit, 8-channel analog-to-digital converter (ADC) from Analog Devices Inc., featuring a maximum throughput of 2 MSPS. It utilizes a half-flash architecture with a conversion time of 420 ns and includes an on-chip track-and-hold amplifier. The device operates on a single supply voltage ranging from 2.7 V to 3.3 V or 4.5 V to 5.5 V, supporting input spans of 2 V p-p at 3 V and 2.5 V p-p at 5 V. Key specifications include ±0.75 LSB INL/DNL, ±2 LSB gain error, and a typical power dissipation of 24 mW in normal operation. It is housed in a 28-lead TSSOP package.
Feature Summary
- Integrates an on-chip 2.5 V reference voltage and track-and-hold amplifier for simplified circuit design.
- Features automatic power-down functionality triggered by the CONVST pin state after conversion completion.
- Provides flexible parallel interface with End-of-Conversion (EOC) pulse for standalone microprocessor interfacing.
- Includes VMID pin capability to adjust analog input offset and accommodate bipolar signal ranges.
Applications
- Data acquisition systems
- DSP front ends
- Disk drives
- Mobile communication systems
- Subsampling applications
Procurement Notes
Verify the specific ordering suffix REEL7 corresponds to tape-and-reel packaging when sourcing components. Confirm that the BRU variant matches the required TSSOP-28 package dimensions and thermal characteristics for your PCB layout. Ensure compatibility with the -40°C to +85°C industrial temperature range specified for this version.
Selection Notes
Select this component for applications requiring high-speed multi-channel sampling with low power consumption. The half-flash architecture offers faster conversion times compared to SAR ADCs at similar resolutions. Consider the on-chip reference and T/H amplifier if external precision references are undesirable. Verify that the 8-bit resolution meets the system's dynamic range requirements.
Part Context
This part belongs to the AD7829-1 family, which shares functional similarities with the AD7822 and AD7825 but differs in channel count. The AD7829-1 specifically provides eight single-ended inputs, whereas other family members offer fewer channels. The 'B' suffix indicates the industrial temperature grade, and 'RU' denotes the TSSOP package type.
Replacement Considerations
The AD7829BRUZ-1 is a parameter-equivalent alternative available in tube packaging. Both parts share identical electrical specifications and pinouts. Verify that the packaging difference does not impact automated assembly processes.
