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Analog Devices Inc. AD7883BR
- Part No.:
- AD7883BR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7883BR.pdf
- Description:
- IC ADC 12BIT LC2MOS 3.3V 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,913
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Product details
Overview
AD7883BR from Analog Devices is a 12-bit, single-supply successive-approximation ADC optimized for battery-powered portable systems. It delivers 50 kHz throughput, 15 µs conversion time, and 70 dB SNR with 3 V to 3.6 V operation - enabling high-fidelity signal acquisition in laptop computers and handheld instrumentation.
For engineers reviewing the AD7883BR datasheet, AD7883BR pinout, AD7883BR application, or AD7883BR equivalent, key selection criteria include unipolar/bipolar input range flexibility (0 to VREF or ±VREF), MODE-controlled power-save mode (1 mW), and SOIC-24 package compatibility with space-constrained PCB layouts.
Technical Context
The AD7883BR integrates a 5 µs track/hold amplifier and 12-bit SAR core using LC2MOS process technology, supporting asynchronous CONVST-triggered conversion independent of CS and RD timing. Its charge-balancing comparator provides inherent track/hold functionality without external components.
It operates with a 2 MHz TTL-compatible CLKIN (40/60–60/40 duty cycle), supports dual analog input configurations via VINA/VINB, and uses VDD as reference source for guaranteed performance - eliminating need for external voltage references in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes for precise digitization of analog sensor or audio signals. |
| Throughput Rate | 50 kHz - enables full-power sampling of up to 25 kHz sinusoidal inputs per Nyquist criterion. |
| Conversion Time | 15 µs max - defines minimum inter-conversion interval when operating at 2 MHz clock. |
| SNR | 69 dB min (71 dB typ) - ensures ≥11.5 effective bits for clean spectral representation up to 12 kHz input frequency. |
| Power Dissipation | 8 mW typ normal mode / 1 mW typ power-save mode - extends battery life in portable devices during idle periods. |
| Analog Input Ranges | 0 to VREF (unipolar) or ±VREF (bipolar) - selectable via external pin configuration without hardware modification. |
| Integral Nonlinearity | ±2 LSB max - guarantees monotonic response and predictable code transitions across full scale. |
Pinout & Package
AD7883BR is housed in a 24-lead Small Outline Integrated Circuit (SOIC) package (R-24), 0.3-inch body width, RoHS-compliant, with standard JEDEC MO-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA, VINB | Analog Inputs | Accept differential or single-ended signals; configure unipolar (0 to VREF) or bipolar (±VREF) ranges per Figure 4/5. |
| VREF | Reference Input | Typically tied to VDD for specified performance; supports down to 2.5 V with reduced specs. |
| AGND, DGND | Analog/Digital Grounds | Must be connected at single star point near AGND pin to minimize noise coupling between domains. |
| CONVST | Asynchronous Start | Rising edge initiates track-to-hold transition and conversion; independent of CS/RD state. |
| CS, RD | Parallel Interface Controls | CS low + RD low enable DB0–DB11 three-state outputs; bus remains high-impedance otherwise. |
| BUSY | Status Output | Active-low open-drain signal indicating conversion in progress; synchronizes read timing. |
| MODE | Power Control | Logic low enables 1 mW power-save mode; requires dummy conversion before first valid data read. |
| DB0–DB11 | Data Outputs | 12-bit straight-binary parallel outputs; three-stated unless CS and RD both low. |
| CLKIN | System Clock Input | 2 MHz TTL-compatible input; mark/space ratio 40/60 to 60/40; drives internal SAR logic. |
| VDD | Supply Rail | +3.3 V nominal (3 V to 3.6 V range); powers analog and digital sections from single rail. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3 V supply operation | Eliminates need for dual-rail supplies or level shifters in portable designs, reducing BOM count and layout complexity. |
| On-chip track/hold amplifier | Acquires 12-bit signals in ≤5 µs without external hold capacitor or driver op amp in basic configurations. |
| Configurable input ranges | Supports both unipolar (0 to VREF) and bipolar (±VREF) modes via pin-strapping - no external resistor networks required. |
| Low-power power-save mode | Reduces current draw to 400 µA max (250 µA typ), enabling >10× longer battery runtime during measurement idle cycles. |
| LC2MOS process integration | Combines precision bipolar front-end with low-power CMOS logic - achieving 70 dB SNR while maintaining 8 mW typical dissipation. |
Applications
| Portable Data Loggers | Laptop Battery Monitoring |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and voltage from multiple sensors in field-deployed environmental monitors. IC Role / Device Role / Timing Role: Primary A/D converter capturing 12-bit samples at 50 kHz for real-time FFT-based spectral analysis. Use Value: 70 dB SNR and ±2 LSB INL ensure accurate quantization of low-amplitude transducer outputs without post-calibration. | Use Scenario: Real-time monitoring of Li-ion cell voltages and charging currents inside ultrabook power management subsystems. IC Role / Device Role / Timing Role: High-speed analog front-end digitizing battery pack telemetry with minimal latency and thermal drift. Use Value: 3 V to 3.6 V operation matches system rail; power-save mode cuts quiescent current during sleep states without sacrificing wake-up responsiveness. |
| Handheld Test Equipment | Industrial Sensor Interfaces |
Use Scenario: Compact oscilloscope or spectrum analyzer modules requiring DC-coupled, wide-dynamic-range signal capture. IC Role / Device Role / Timing Role: Core ADC providing 12-bit resolution and bipolar input capability for AC/DC signal analysis. Use Value: ±VREF input configuration enables direct measurement of AC-coupled signals without external level-shifting circuitry. | Use Scenario: Digitizing 4–20 mA loop outputs and thermocouple signals in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Precision analog-to-digital interface handling multiple sensor types with configurable gain and offset compensation. Use Value: Unipolar 0 to VREF mode simplifies connection to industrial transmitters; 15 µs conversion time supports fast control loop updates. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, 200 kSPS, 2.7–5.5 V supply | Lower resolution and serial interface limit use in high-fidelity audio or precision sensor systems requiring parallel 12-bit output. | Select only if lower resolution and serial interface align with system architecture and cost targets. |
| MAX1113ECPP | 12-bit, 100 kSPS, 2.7–3.6 V, SPI interface, internal reference | Lacks bipolar input support and requires external clock; higher throughput but incompatible pinout and protocol. | Prefer for new designs needing higher speed and integrated reference, but expect PCB and firmware redesign. |
Compared with ADS7822U and MAX1113ECPP, the AD7883BR offers unique value in parallel 12-bit output, bipolar/unipolar configurability, and proven 70 dB SNR at 50 kHz - making it optimal for legacy-matched upgrades and space-constrained portable instrumentation where analog interface simplicity is critical.
Availability
AD7883BR is available at Aetrix Electronics and suitable for portable data loggers, laptop battery monitoring, handheld test equipment, and industrial sensor interfaces requiring stable component supply and long-term manufacturability.
Supply support for AD7883BR 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 since 1965.
The AD7883BR belongs to Analog Devices' precision SAR ADC product line, designed specifically for low-power, high-accuracy data acquisition in battery-operated and space-constrained embedded systems.
FAQ
What is the maximum sampling frequency supported by the AD7883BR?
The AD7883BR supports a maximum throughput rate of 50 kHz, corresponding to a minimum total conversion cycle time of 20 µs (15 µs conversion + 5 µs track/hold acquisition). This allows full-power sampling of input signals up to 25 kHz while satisfying the Nyquist–Shannon sampling theorem. The device is specified with a 2 MHz CLKIN, and performance degrades slightly at lower clock frequencies due to hold capacitor leakage effects.
Does the AD7883BR require an external voltage reference?
No, the AD7883BR does not require an external voltage reference for specified performance. It is designed to use VDD as the reference source (VREF = VDD), simplifying design and reducing component count. The part will operate with VREF as low as 2.5 V, though dc accuracy and dynamic performance specifications are degraded below VDD. VREF must not exceed VDD by more than 100 mV.
How does the MODE pin affect power consumption in the AD7883BR?
The MODE pin controls power-save mode: when pulled to logic low (0 V), the AD7883BR enters a low-power state drawing 400 µA max (250 µA typ), reducing power dissipation to 1.5 mW max. In normal operation (MODE = VDD), typical current is 2 mA at +25°C. After exiting power-save mode, one dummy conversion is required to reset internal logic before reading valid data from the AD7883BR.
What are the analog input configuration options for the AD7883BR?
The AD7883BR supports two analog input configurations: unipolar (0 to VREF) and bipolar (±VREF), selected via external connections to VINA, VINB, and VREF per Figures 4 and 5 in the datasheet. In unipolar mode, VINA and VINB are tied together to the signal source; in bipolar mode, VINB connects to VREF. No external resistors or switches are needed - configuration is purely pin-level.
Is the AD7883BR pin-compatible with other members of the AD7883 family?
Yes, the AD7883BR is pin-compatible with the AD7883BN (24-pin DIP), sharing identical pin functions, electrical characteristics, and timing behavior across the –40°C to +85°C temperature range. Both variants use the same LC2MOS process and functional block diagram. The only difference is package type: BR = SOIC-24, BN = plastic DIP-24 - allowing drop-in replacement on PCBs designed for either variant with appropriate land pattern adaptation.
AD7883BR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7883BR FAQ
1.How can I place an order for AD7883BR through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7883BR 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 AD7883BR reliable?
The price and inventory of AD7883BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7883BR is usually 5 days.
3.What payment methods are accepted for AD7883BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7883BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7883BR?
AD7883BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7883BR 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 AD7883BR?
For technical support, including AD7883BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7883BR requirements.
6.How does Aetrix verify that AD7883BR is sourced from the original manufacturer or authorized distributors?
All AD7883BR 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 AD7883BR meets industry standards.
7.What is the process for return or replacement of AD7883BR?
All AD7883BR units undergo pre-shipment inspection (PSI). If there is an issue with AD7883BR, 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 AD7883BR part is unused and in its original packaging.
Return procedure for AD7883BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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