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Analog Devices Inc. AD7829BRUZ-REEL
- Part No.:
- AD7829BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7829BRUZ-REEL.pdf
- Description:
- IC ADC 8BIT PIPELINED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
AD7829BRUZ-REEL from Analog Devices is an 8-bit, 2 MSPS, 8-channel parallel-output analog-to-digital converter with on-chip 2.5 V reference, 420 ns conversion time, and single-supply operation at 3 V ±10% or 5 V ±10%. It integrates track-and-hold, half-flash ADC architecture, and automatic power-down triggered by CONVST logic level at EOC assertion - used in high-speed data acquisition front ends for DSP systems and disk drive controllers.
For engineers reviewing the AD7829BRUZ-REEL datasheet, AD7829BRUZ-REEL pinout, AD7829BRUZ-REEL application, or AD7829BRUZ-REEL equivalent, key selection criteria include channel count (8 single-ended), conversion speed (2 MSPS), supply flexibility (3 V/5 V), input span adjustability via VMID, and parallel interface timing compatibility with 8051/PIC/ADSP microcontrollers.
Technical Context
The AD7829BRUZ-REEL implements a two-stage half-flash ADC architecture: a 4-bit flash stage generates MSBs, followed by a second flash stage for LSBs, completing full 8-bit conversion within 420 ns. Its track-and-hold acquires input in ≤200 ns and supports full-scale signals up to 10 MHz.
Channel selection is performed externally via A0–A2 address inputs synchronized with RD; conversion initiation and power management share the CONVST pin, where low state at EOC high triggers automatic power-down. The device uses separate AGND/DGND planes and accepts external or internal 2.5 V reference via VREF IN/OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes per conversion cycle. |
| Max Throughput | 2 MSPS - enables real-time sampling of signals up to 10 MHz (Nyquist-limited) without aliasing in subsampling applications. |
| Conversion Time | 420 ns max - defines minimum inter-conversion interval; allows ≥2.38 million conversions/sec in continuous mode. |
| Analog Input Channels | 8 single-ended - selectable via A0/A1/A2 pins; no internal register writes required for channel switching. |
| Supply Voltage Range | 2.7 V to 3.3 V or 4.5 V to 5.5 V - supports dual-voltage system integration without level-shifting circuitry. |
| On-Chip Reference | 2.5 V ±2% - eliminates need for external reference; usable as VREF IN/OUT with optional decoupling. |
| Power Consumption | 12 mA typical at 2 MSPS (3 V or 5 V) - drops to 5 µA in power-down mode, enabling burst-mode low-power operation. |
| Input Span Adjustment | VMID pin sets center point from AGND to VDD - supports offset calibration and single-supply op amp interfacing. |
Pinout & Package
AD7829BRUZ-REEL is housed in a 28-lead TSSOP package (4.4 mm × 9.7 mm, 0.65 mm pitch), RoHS-compliant and moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1–VIN8 | Analog Input Channels | Eight single-ended inputs; default range = 0 V to 2.5 V (5 V supply) or 0 V to 2 V (3 V supply); centered by VMID. |
| CONVST | Convert Start / Power Control | Falling edge initiates conversion and places T/H in hold mode; logic level sampled at EOC high determines auto power-down. |
| EOC | End-of-Conversion Output | Active-low pulse (≥70 ns wide) signals completion; used to trigger MCU interrupt or latch data in external logic. |
| RD & CS | Parallel Interface Enable | Both low enable DB0–DB7 output drivers; RD strobes valid data onto bus; CS isolates shared data bus. |
| A0–A2 | Channel Address Inputs | 3-bit binary selects one of eight VIN channels prior to RD falling edge; no internal addressing overhead. |
| DB0–DB7 | Parallel Data Outputs | 8-bit straight-binary output; high-impedance when RD/CS inactive; compatible with 3 V/5 V logic families. |
| VREF IN/OUT | Reference I/O | Supplies or sinks 2.5 V reference; internal 2.5 V source available; external reference overrides internal source. |
| VMID | Input Span Center | Sets midpoint voltage for analog input range; unconnected defaults to 1.25 V (5 V) or 1.0 V (3 V). |
| VDD, AGND, DGND | Power & Ground | Single supply input; separate analog/digital ground pins require star-point connection for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| 420 ns conversion time | Enables maximum 2.38 MSPS throughput - preserves DSP processing time in real-time signal chains. |
| 8-channel multiplexed input | Reduces board space and BOM count vs. multiple single-channel ADCs; channel selection requires no SPI/I²C overhead. |
| VMID-adjustable input span | Allows DC offset compensation and accommodates single-supply sensor outputs without external op amp biasing. |
| Automatic power-down | Reduces average current to µA range between conversions - critical for battery-powered or thermally constrained systems. |
| On-chip 2.5 V reference | Eliminates external reference IC and associated decoupling; ±2% tolerance supports 8-bit accuracy without trimming. |
| 10 MHz full-power bandwidth | Supports undersampling of IF signals in communications receivers - avoids need for anti-alias filtering above Nyquist. |
Applications
| Disk Drive Read Channel | DSP-Based Motor Control |
|---|---|
|
Use Scenario: Digitizing position feedback and current sense signals from spindle and voice coil motors in HDD servo loops. IC Role / Device Role / Timing Role: ADC front end acquiring 8-channel analog sensor data at 2 MSPS for real-time PID computation in ADSP-21xx processors. Use Value: 420 ns conversion + parallel interface enables deterministic latency <1 µs - meeting tight servo loop timing budgets. |
Use Scenario: Sampling phase currents, bus voltage, and temperature sensors in industrial inverters with isolated gate drivers. IC Role / Device Role / Timing Role: High-speed analog capture unit synchronizing with PWM carrier frequency to support field-oriented control algorithms. Use Value: 8-channel capability replaces four dual-channel ADCs; VMID adjustment compensates for current-sense amplifier offsets. |
| Mobile Baseband Subsampling | Test Equipment Signal Capture |
|
Use Scenario: Direct IF sampling in GSM/EDGE receiver architectures where 70–100 MHz IF signals are downconverted to baseband. IC Role / Device Role / Timing Role: Undersampling ADC capturing band-limited RF signals at 2 MSPS with 10 MHz FPBW and SNR >48 dB @30 kHz. Use Value: Eliminates image-reject filters and mixer stages - reduces component count and PCB area in compact RF modules. |
Use Scenario: Capturing transient waveforms in automated test equipment for semiconductor validation and failure analysis. IC Role / Device Role / Timing Role: High-fidelity digitizer interfaced to FPGA-based memory controller for burst-mode acquisition of multi-channel analog stimuli. Use Value: Parallel DB0–DB7 interface achieves zero-wait-state data transfer to FPGA FIFOs - sustaining 2 MSPS sustained capture. |
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 |
|---|---|---|---|
| AD7825BRUZ | 4-channel version in same 24-lead TSSOP; identical 420 ns conversion, 2 MSPS, and VMID functionality. | Lower channel density suits cost-sensitive 4-sensor systems; shares footprint and timing but lacks VIN5–VIN8. | Select AD7825BRUZ when only four analog inputs are required and PCB layout reuse is prioritized. |
| ADS8320UB | 10-bit, 1 MSPS, SPI interface, 3 V only; no on-chip reference; higher resolution but slower and serial-only. | Requires external reference and microcontroller SPI resources; unsuitable for parallel-bus or 2 MSPS timing-critical systems. | Choose ADS8320UB only if 10-bit resolution outweighs speed loss and interface redesign overhead. |
Compared with AD7825BRUZ, AD7829BRUZ-REEL provides double the channel count in a larger 28-pin TSSOP; compared with ADS8320UB, it trades resolution for speed, parallel simplicity, and integrated reference - making AD7829BRUZ-REEL optimal for high-throughput, multi-signal, microprocessor-connected systems.
Availability
AD7829BRUZ-REEL is available at Aetrix Electronics and suitable for disk drive servo control, DSP motor control, mobile IF sampling, and automated test equipment requiring stable component supply and long-term production continuity.
Supply support for AD7829BRUZ-REEL 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD782x family was designed specifically for high-speed, low-latency data acquisition in real-time embedded systems - emphasizing minimal conversion delay, flexible supply operation, and seamless microprocessor interfacing without external glue logic.
FAQ
What is the maximum sampling rate supported by the AD7829BRUZ-REEL?
The AD7829BRUZ-REEL supports a maximum throughput of 2 MSPS, enabled by its 420 ns conversion time and parallel interface. This rate is achievable across the full operating temperature range (−40°C to +85°C) and both supply conditions (3 V ±10% and 5 V ±10%). Real-world sustained performance depends on proper timing alignment of CONVST, RD, and CS signals per Table 2 in the AD7829BRUZ-REEL datasheet.
Does the AD7829BRUZ-REEL require an external reference voltage?
No, the AD7829BRUZ-REEL includes an on-chip 2.5 V reference with ±2% initial accuracy and 50 ppm/°C temperature coefficient, accessible via the VREF IN/OUT pin. External reference is optional and only needed if tighter voltage tolerance or lower drift is required. When using the internal reference, VREF IN/OUT may be left unconnected or decoupled to AGND with a 0.1 µF capacitor.
How does channel selection work on the AD7829BRUZ-REEL?
Channel selection on the AD7829BRUZ-REEL is performed using three dedicated address pins - A0, A1, and A2 - which encode binary values 000 to 111 to select VIN1 through VIN8. The selected channel must be stable before the falling edge of RD; no internal register writes or serial configuration are required, simplifying firmware and reducing latency versus software-configured ADCs.
What is the purpose of the VMID pin on the AD7829BRUZ-REEL?
The VMID pin on the AD7829BRUZ-REEL sets the center voltage of the analog input span. With VMID unconnected, the default center is 1.25 V (5 V supply) or 1.0 V (3 V supply), yielding input ranges of 0–2.5 V or 0–2 V. Applying an external voltage to VMID shifts this center point anywhere between AGND and VDD - enabling offset correction and compatibility with single-supply sensor interfaces without external level-shifting circuitry.
Can the AD7829BRUZ-REEL operate from a 3.3 V supply?
Yes, the AD7829BRUZ-REEL operates from 2.7 V to 3.3 V (3 V ±10%) and from 4.5 V to 5.5 V (5 V ±10%). At 3.3 V, it maintains full 2 MSPS throughput, 420 ns conversion time, and all specified AC/DC performance - including SNR ≥48 dB and INL ≤±0.75 LSB. Logic thresholds scale accordingly: VINH ≥2.0 V and VINL ≤0.4 V under 3 V operation.
AD7829BRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm 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-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7829BRUZ-REEL FAQ
1.How can I place an order for AD7829BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7829BRUZ-REEL 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 AD7829BRUZ-REEL reliable?
The price and inventory of AD7829BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7829BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7829BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7829BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7829BRUZ-REEL?
AD7829BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7829BRUZ-REEL 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 AD7829BRUZ-REEL?
For technical support, including AD7829BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7829BRUZ-REEL requirements.
6.How does Aetrix verify that AD7829BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7829BRUZ-REEL 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 AD7829BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7829BRUZ-REEL?
All AD7829BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7829BRUZ-REEL, 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 AD7829BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7829BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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