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Analog Devices Inc. AD7876BRZ-REEL7
- Part No.:
- AD7876BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7876BRZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
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Product details
Overview
AD7876BRZ-REEL7 from Analog Devices is a complete monolithic 12-bit successive approximation ADC with integrated track-and-hold amplifier, laser-trimmed internal clock, and on-chip 3 V buried Zener reference. It supports ±10 V bipolar analog input range, achieves 8 μs conversion time with external 2.5 MHz clock, and delivers 57 ns data access time for microprocessor interfacing in industrial data acquisition systems.
For engineers reviewing the AD7876BRZ-REEL7 datasheet, AD7876BRZ-REEL7 pinout, AD7876BRZ-REEL7 application, or AD7876BRZ-REEL7 equivalent, key selection criteria include its SOIC-24 package, bipolar ±10 V input capability, guaranteed DC accuracy (±1 LSB INL max), dynamic performance suitability for DSP signal chains up to 50 kHz full-power input, and support for parallel/byte/serial digital interfaces without external timing components.
Technical Context
The AD7876BRZ-REEL7 implements a SAR architecture with internal 3 V reference and 2 μs track-and-hold acquisition. Its analog front-end uses resistor-scaling networks to accommodate ±10 V input while maintaining 12-bit resolution and twos-complement output coding.
Digital interface logic supports three modes: 12-bit parallel (DB11–DB0), two-byte (HBEN-controlled), and serial (SCLK/SSTRB/SDATA). The 12/8/CLK pin selects format and controls SCLK gating; BUSY/INT provides asynchronous status signaling; CONVST initiates conversion on rising edge independent of clock source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes; defines minimum quantization step of 4.88 mV for ±10 V full-scale range. |
| Input Range | ±10 V - enables direct digitization of industrial sensor outputs (e.g., ±10 V transducers) without external scaling amplifiers. |
| Conversion Time | 8 μs max with 2.5 MHz external clock - sets maximum throughput at 100 kSPS, matching real-time control loop requirements. |
| Data Access Time | 57 ns max - ensures compatibility with fast 8-bit/16-bit microprocessors (e.g., Intel 80C188, Motorola 68HC11) without wait states. |
| Reference Output | 3.00 V ±10 mV - stable internal Zener reference usable as system reference or scaled externally to 5 V/10 V via resistor dividers. |
| Power Dissipation | 95 mW max at ±5 V supplies - supports low-heat-generation designs in dense PCB layouts without forced cooling. |
| Integral Nonlinearity | ±1 LSB max - ensures monotonicity and <0.025% end-point linearity error across full temperature range (−40°C to +85°C). |
Pinout & Package
AD7876BRZ-REEL7 is housed in a 24-pin small outline integrated circuit (SOIC) package with 0.3 inch body width and standard JEDEC MS-013AC footprint. Pin 1 identifier is marked by a notch or dot; pins are numbered counterclockwise from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog Input | Accepts ±10 V differential input relative to AGND; internal resistor network scales signal for 12-bit SAR core. |
| REF OUT | Reference Output | Provides factory-trimmed 3.00 V ±10 mV Zener reference; load limited to 500 μA; requires ≤50 pF capacitance for stability. |
| CONVST | Convert Start | Rising-edge-triggered asynchronous control; initiates track-to-hold transition and conversion sequence independently of CLK. |
| CS | Chip Select | Active-low enable for digital interface; when low and RD low, enables DBx outputs; tied low with CONVST for auto-conversion mode. |
| RD | Read Strobe | Active-low pulse that latches valid conversion data onto DB11–DB0 bus; determines 57 ns access timing window. |
| BUSY/INT | Status Output | Open-drain active-low signal indicating conversion in progress (BUSY) or completion (INT); requires external pull-up. |
| CLK | Clock Input | Accepts TTL-compatible 2.5 MHz external clock; tied to VSS to enable internal laser-trimmed oscillator (6.5–9 μs conversion). |
| 12/8/CLK | Interface Mode Control | Selects 12-bit parallel (high), byte/serial (low), or continuous SCLK serial (−5 V); configures DBx pin functionality. |
| DB11–DB0 | Data Outputs | Three-state parallel outputs delivering twos-complement 12-bit result; pin roles reconfigured under HBEN/12/8/CLK control. |
| AGND / DGND | Analog/Digital Ground | Separate ground pins minimize noise coupling; AGND references track-and-hold, DAC, and reference; DGND references logic. |
| VDD / VSS | Power Supplies | +5 V ±5% (VDD) and −5 V ±5% (VSS) required; decoupling capacitors mandatory at each supply pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Complete ADC subsystem | Integrates track-and-hold, 12-bit SAR core, 3 V Zener reference, and interface logic-eliminates need for external timing, reference, or sample-hold ICs. |
| Laser-trimmed internal clock | Guarantees 6.5–9 μs conversion time without external crystal or RC network; reduces BOM count and layout sensitivity. |
| Flexible digital interface | Supports 12-bit parallel, two-byte, and serial output formats via pin-strapped configuration-enables reuse across 8-bit, 16-bit, and low-pin-count controllers. |
| Bipolar ±10 V input | Directly interfaces with industrial voltage-output sensors and PLC analog I/O modules without level-shifting circuitry. |
| DC accuracy guarantee | Specified ±1 LSB integral nonlinearity and ±6 LSB bipolar zero error over −40°C to +85°C-supports precision calibration in embedded systems. |
Applications
| Industrial Data Acquisition | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Digitizing ±10 V outputs from strain gauge bridges, RTD transmitters, and process current loops in programmable logic controllers. IC Role / Device Role / Timing Role: Primary ADC in isolated analog input modules; handles 100 kSPS sampling with deterministic 8 μs conversion latency. Use Value: Eliminates external signal conditioning for ±10 V sensors, reducing component count and improving channel density in 16-channel DAQ cards. |
Use Scenario: Capturing transient waveforms and spectral analysis in portable oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Front-end ADC synchronized to FPGA-controlled trigger and memory buffer; leverages 57 ns bus access for high-speed DMA transfers. Use Value: Enables real-time waveform capture at 100 kSPS with guaranteed monotonicity, supporting FFT-based frequency domain analysis without code dropout artifacts. |
| Motor Control Feedback | Medical Instrumentation |
|
Use Scenario: Sampling phase currents and DC bus voltages in servo drives and inverters requiring ±10 V isolation amplifier outputs. IC Role / Device Role / Timing Role: High-accuracy current/voltage monitor ADC in closed-loop torque control; operates with minimal latency to support 20 kHz PWM switching. Use Value: Delivers 12-bit resolution with ±1 LSB INL, ensuring precise current reconstruction for field-oriented control algorithms without software linearization. |
Use Scenario: Converting analog outputs from ECG, EEG, and patient monitoring sensors with ±10 V dynamic range. IC Role / Device Role / Timing Role: Low-noise, calibrated ADC in battery-powered diagnostic devices; uses internal reference to avoid drift-sensitive external references. Use Value: Provides stable 3 V reference and 2 μs track-and-hold acquisition, enabling accurate digitization of low-amplitude bio-signals without additional anti-alias filtering overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7875BRZ-REEL7 | Unipolar 0 V to +5 V input range; same SOIC-24 package and pinout; identical timing and interface logic. | Designed for single-supply systems with 0–5 V sensors (e.g., potentiometers, unipolar transducers); lacks bipolar offset handling. | Select AD7875BRZ-REEL7 only when input signals are strictly unipolar and system ground-referenced. |
| ADS7822U | 12-bit SAR ADC in MSOP-8; SPI interface only; 200 kSPS max; external reference required; no integrated track-and-hold. | Targeted at space-constrained, low-pin-count applications (e.g., handheld meters); requires external op-amp driver and reference. | Choose ADS7822U for compact designs where serial interface suffices and board area is critical; not drop-in compatible with AD7876BRZ-REEL7. |
Compared with AD7875BRZ-REEL7, AD7876BRZ-REEL7 provides bipolar ±10 V input capability essential for industrial transducers, while ADS7822U trades integration and package size for reduced footprint and SPI simplicity-neither offers pin compatibility or identical analog front-end functionality.
Availability
AD7876BRZ-REEL7 is available at Aetrix Electronics and suitable for industrial data acquisition, test equipment, motor control feedback, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7876BRZ-REEL7 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, headquartered in Norwood, MA, with design centers worldwide.
The AD7876BRZ-REEL7 belongs to the LC2MOS 12-bit SAR ADC family designed for precision industrial and instrumentation applications demanding integrated reference, track-and-hold, and flexible microprocessor interfacing in harsh environments.
FAQ
What is the maximum analog input frequency supported by the AD7876BRZ-REEL7?
The AD7876BRZ-REEL7 can accurately convert full-power analog signals up to 50 kHz while maintaining 12-bit resolution. This is enabled by its 2 μs track-and-hold acquisition time and 500 kHz typical input bandwidth, satisfying Nyquist criterion at 100 kSPS sampling rate. Performance remains within specified SNR and THD limits for inputs below 50 kHz.
Does the AD7876BRZ-REEL7 require external components to operate?
No, the AD7876BRZ-REEL7 is a complete ADC subsystem requiring only power supply decoupling capacitors (recommended: 0.1 μF ceramic + 10 μF tantalum per supply pin). It integrates a laser-trimmed clock, 3 V reference, track-and-hold amplifier, and interface logic-no external timing, reference, or sample-hold ICs are needed for basic operation.
What digital interface modes does the AD7876BRZ-REEL7 support?
The AD7876BRZ-REEL7 supports three interface modes selected via the 12/8/CLK pin: 12-bit parallel (DB11–DB0), two-byte (using HBEN to select high/low byte), and serial (SCLK/SSTRB/SDATA). All modes use standard CS and RD control signals and are fully compatible with common microprocessors and DSPs without glue logic.
Can the internal 3 V reference of the AD7876BRZ-REEL7 be used for external circuitry?
Yes, the REF OUT pin provides a 3.00 V ±10 mV temperature-compensated Zener reference capable of sourcing up to 500 μA. For external use, Analog Devices recommends series decoupling with a 200 Ω resistor and parallel 10 μF tantalum + 0.1 μF ceramic capacitor to suppress switching noise from the ADC core.
What is the operating temperature range for the AD7876BRZ-REEL7?
The AD7876BRZ-REEL7 is specified for industrial operation from −40°C to +85°C (B and C grade versions). This range covers most factory automation, motor drive, and outdoor instrumentation environments. The T-grade version extends to −55°C to +125°C but is not offered in the BRZ-REEL7 variant.
AD7876BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI, Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7876BRZ-REEL7 FAQ
1.How can I place an order for AD7876BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7876BRZ-REEL7 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 AD7876BRZ-REEL7 reliable?
The price and inventory of AD7876BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7876BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7876BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7876BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7876BRZ-REEL7?
AD7876BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7876BRZ-REEL7 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 AD7876BRZ-REEL7?
For technical support, including AD7876BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7876BRZ-REEL7 requirements.
6.How does Aetrix verify that AD7876BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7876BRZ-REEL7 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 AD7876BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7876BRZ-REEL7?
All AD7876BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7876BRZ-REEL7, 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 AD7876BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7876BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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