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Analog Devices Inc. AD7829BRWZ-1RL7
- Part No.:
- AD7829BRWZ-1RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7829BRWZ-1RL7.pdf
- Description:
- IC ADC 8BIT PIPELINED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,048
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Product details
Overview
AD7829BRWZ-1RL7 from Analog Devices is a high-speed, 8-channel, 8-bit parallel-output analog-to-digital converter (ADC) with 2 MSPS throughput, 420 ns conversion time, on-chip 2.5 V reference, and track-and-hold amplifier. It operates from single 3 V ±10% or 5 V ±10% supply and supports data acquisition in DSP front ends and mobile communication subsampling systems.
For engineers reviewing the AD7829BRWZ-1RL7 datasheet, AD7829BRWZ-1RL7 pinout, AD7829BRWZ-1RL7 application, or AD7829BRWZ-1RL7 equivalent, key selection considerations include its 8-channel single-ended input architecture, automatic power-down via CONVST, EOC-driven stand-alone operation, and VMID-adjustable input span for system offset compensation.
Technical Context
The AD7829BRWZ-1RL7 implements a half-flash ADC architecture with two-stage conversion: a 4-bit coarse flash followed by a 4-bit fine flash to achieve full 8-bit resolution in ≤420 ns. Its track-and-hold acquires input signals within 200 ns and supports full-power bandwidth up to 10 MHz.
Channel selection is performed externally via A2–A0 address lines prior to RD assertion; no internal register write is required. The CONVST pin serves dual function-initiating conversion on its falling edge and enabling automatic power-down when sampled low at EOC assertion-eliminating need for external control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit-guarantees no missing codes across full operating range. |
| Throughput Rate | 2 MSPS-enables real-time sampling of signals up to 10 MHz Nyquist frequency. |
| Conversion Time | 420 ns max-defines minimum inter-conversion interval for continuous channel scanning. |
| Analog Input Span | 0 V to 2.5 V p-p at 5 V supply or 0 V to 2 V p-p at 3 V supply-set automatically by internal VDD detector. |
| On-Chip Reference | 2.5 V ±2%-reduces BOM count; eliminates need for external precision reference unless higher accuracy required. |
| Channel Count | 8 single-ended inputs-supports multiplexed acquisition without external MUX or sequencing logic. |
| Power Consumption | 12 mA max at 2 MSPS (3 V/5 V); 5 μA in power-down-enables burst-mode operation for ultra-low average power. |
Pinout & Package
AD7829BRWZ-1RL7 is housed in a 28-lead wide-body SOIC (SOIC_W) package with standard 0.3-inch body width and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN8 | Analog Input Channels | Eight single-ended inputs; default span centered at VMID (1 V or 1.25 V), adjustable via external VMID voltage. |
| CONVST | Convert Start / Power-Down Control | Falling edge initiates conversion; logic level sampled at EOC rising edge determines auto power-down activation. |
| EOC | End-of-Conversion Output | Active-low pulse signals completion; used to trigger microcontroller interrupt or latch data without polling. |
| RD & CS | Parallel Interface Enable | Both must be low to enable DB0–DB7 outputs; supports shared bus arbitration in multi-peripheral systems. |
| A2–A0 | Channel Address Inputs | 3-bit binary select for next VIN channel; latched on RD falling edge-no internal address register needed. |
| VREF IN/OUT | Reference I/O | Provides access to internal 2.5 V reference or accepts external 2.5 V ±2% source; decoupling recommended. |
| VMID | Input Span Center Voltage | Sets common-mode center point; enables bipolar signal handling or system offset cancellation when driven externally. |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Enables 420 ns conversion time while maintaining 8-bit linearity-critical for high-throughput DSP front ends. |
| Automatic power-down on CONVST | Reduces average current to 5 μA between conversions-ideal for battery-powered or duty-cycled acquisition systems. |
| VMID-adjustable input span | Allows input range to be centered anywhere from AGND to VDD-eliminates need for external op-amp level-shifting in many sensor interfaces. |
| On-chip 2.5 V reference | ±2% initial accuracy and 50 ppm/°C drift-sufficient for industrial-grade measurement without external trimming. |
| Channel-to-channel isolation | −70 dB typical-ensures crosstalk does not degrade simultaneous multi-channel accuracy in dense PCB layouts. |
Applications
| Data Acquisition Systems | DSP Front Ends |
|---|---|
Use Scenario: High-speed monitoring of multiple industrial sensors (temperature, pressure, vibration) with synchronized sampling. IC Role / Device Role / Timing Role: 8-channel parallel ADC providing time-aligned digital samples to FPGA or microcontroller DMA engine. Use Value: 2 MSPS throughput and 420 ns conversion enable sub-microsecond inter-channel latency-critical for phase-coherent multi-sensor analysis. | Use Scenario: Real-time digitization of RF IF signals in software-defined radio or baseband processing chains. IC Role / Device Role / Timing Role: Front-end ADC feeding fixed-point DSP cores (e.g., ADSP-21xx) via parallel bus with EOC-triggered interrupt. Use Value: 10 MHz full-power bandwidth and −55 dB THD support clean subsampling of band-limited signals without aliasing degradation. |
| Disk Drive Read Channels | Mobile Communication Subsampling |
Use Scenario: Analog signal conditioning and digitization of magnetic head readback waveforms in HDD servo control loops. IC Role / Device Role / Timing Role: Low-latency ADC capturing PRML or EPRML waveform segments during seek/settle phases. Use Value: Track-and-hold acquisition time of 200 ns ensures accurate capture of fast transient pulses-even during mechanical actuator motion. | Use Scenario: Intermediate-frequency sampling in GSM/EDGE transceivers where direct RF sampling is impractical. IC Role / Device Role / Timing Role: Stand-alone ADC acquiring IF bursts using EOC pulse to gate sample-and-hold or trigger DSP processing. Use Value: Flexible 3 V/5 V operation and automatic power-down allow integration into power-constrained handheld platforms with minimal thermal impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, multi-channel, parallel-interface ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7829BRUZ-1 | TSSOP-28 package (vs. SOIC_W); identical electrical specs and pinout. | Better suited for space-constrained PCBs; same thermal resistance not guaranteed due to different θJA (128°C/W vs. 75°C/W). | Select AD7829BRUZ-1 only when board area is critical and thermal margin allows higher junction temperature rise. |
| MAX1138EEE+ | 8-channel, 8-bit, 2 MSPS, but uses SPI interface and requires external reference; no on-chip T/H. | Requires additional level-shifting and clock generation; unsuitable for legacy parallel-bus microcontrollers without glue logic. | Choose MAX1138EEE+ only when serial interface simplifies routing and external reference meets system accuracy targets. |
Compared with AD7829BRWZ-1RL7, AD7829BRUZ-1 offers identical performance in a smaller footprint but reduced thermal headroom, while MAX1138EEE+ trades parallel simplicity for serial flexibility and added external component requirements.
Availability
AD7829BRWZ-1RL7 is available at Aetrix Electronics and suitable for data acquisition systems, disk drive electronics, and mobile communication subsampling applications requiring stable component supply across extended production lifecycles.
Supply support for AD7829BRWZ-1RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD7829 family was designed specifically for high-speed, low-latency, multi-channel data acquisition in resource-constrained embedded systems-emphasizing ease of microprocessor interfacing and minimal external component count.
FAQ
What is the maximum sampling rate supported by the AD7829BRWZ-1RL7?
The AD7829BRWZ-1RL7 supports a maximum throughput rate of 2 MSPS (million samples per second), corresponding to a guaranteed maximum conversion time of 420 ns. This rate is achievable across the full −40°C to +85°C industrial temperature range with both 3 V ±10% and 5 V ±10% supplies, as verified in the Timing Characteristics table of the official datasheet.
Does the AD7829BRWZ-1RL7 require an external reference voltage?
No, the AD7829BRWZ-1RL7 includes an on-chip 2.5 V reference with ±2% initial accuracy and 50 ppm/°C temperature coefficient, sufficient for most industrial applications. The VREF IN/OUT pin may be left unconnected or decoupled to AGND with a 0.1 µF capacitor. An external 2.5 V ±2% reference can be applied if tighter accuracy or lower drift is required.
How does the automatic power-down feature work on the AD7829BRWZ-1RL7?
The AD7829BRWZ-1RL7 powers down automatically when the CONVST pin is sampled low at the rising edge of the EOC signal. This occurs at the end of each conversion cycle. If CONVST remains low, the device enters power-down mode drawing only 5 µA. To resume conversion, a rising edge on CONVST re-enables full operation-no separate wake-up command is needed.
Can the AD7829BRWZ-1RL7 interface directly with a 3.3 V microcontroller?
Yes, the AD7829BRWZ-1RL7 supports 3 V ±10% operation (2.7 V to 3.3 V), and its logic inputs accept VIH ≥ 2.0 V and VIL ≤ 0.4 V under those conditions-fully compatible with standard 3.3 V CMOS levels. Its DB0–DB7 outputs drive VOH ≥ 2.4 V and VOL ≤ 0.2 V at 200 µA load, ensuring robust noise margins in mixed-voltage systems.
What is the purpose of the VMID pin on the AD7829BRWZ-1RL7?
The VMID pin sets the center voltage of the AD7829BRWZ-1RL7's analog input span. With no connection, it defaults to 1.0 V (at 3 V supply) or 1.25 V (at 5 V supply), establishing a 0 V–2 V or 0 V–2.5 V input range. Driving VMID externally allows the input range to be shifted-for example, to accommodate bipolar signals or cancel system-level DC offsets-without external op-amps.
AD7829BRWZ-1RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.3V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.3V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7829BRWZ-1RL7 FAQ
1.How can I place an order for AD7829BRWZ-1RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7829BRWZ-1RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7829BRWZ-1RL7 reliable?
The price and inventory of AD7829BRWZ-1RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7829BRWZ-1RL7 is usually 5 days.
3.What payment methods are accepted for AD7829BRWZ-1RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7829BRWZ-1RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7829BRWZ-1RL7?
AD7829BRWZ-1RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7829BRWZ-1RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7829BRWZ-1RL7?
For technical support, including AD7829BRWZ-1RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7829BRWZ-1RL7 requirements.
6.How does Aetrix verify that AD7829BRWZ-1RL7 is sourced from the original manufacturer or authorized distributors?
All AD7829BRWZ-1RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7829BRWZ-1RL7 meets industry standards.
7.What is the process for return or replacement of AD7829BRWZ-1RL7?
All AD7829BRWZ-1RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7829BRWZ-1RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7829BRWZ-1RL7 part is unused and in its original packaging.
Return procedure for AD7829BRWZ-1RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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