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Analog Devices Inc. AD7883BR-REEL
- Part No.:
- AD7883BR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7883BR-REEL.pdf
- Description:
- IC ADC 12BIT MONO LP 3.3V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AD7883BR-REEL from Analog Devices is a 12-bit, single-supply SAR analog-to-digital converter 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 digitization in laptop computers and handheld instrumentation.
For engineers reviewing the AD7883BR-REEL datasheet, AD7883BR-REEL pinout, AD7883BR-REEL application, or AD7883BR-REEL equivalent, key selection criteria include unipolar/bipolar input range flexibility, 5 µs track/hold acquisition, power-save mode (1 mW), SOIC-24 package compatibility, and dynamic performance at 50 kHz sampling.
Technical Context
The AD7883BR-REEL implements a charge-balanced comparator-based SAR architecture with integrated track/hold, eliminating external hold capacitors. Its LC2MOS process combines bipolar precision with CMOS logic efficiency, supporting true 12-bit resolution across –40°C to +85°C.
Conversion is initiated asynchronously by CONVST rising edge; BUSY goes low for ≤15 µs while internal 26–28 clock cycles complete. Data appears on DB0–DB11 after RD assertion, with three-state outputs controlled jointly by CS and RD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - supports 4096 discrete output codes for precise amplitude quantization. |
| Throughput Rate | 50 kHz - enables full-power signal capture up to 25 kHz per Nyquist criterion. |
| Conversion Time | 15 µs max - defines minimum inter-conversion interval in high-speed sampling sequences. |
| Track/Hold Acquisition | 5 µs max - ensures 12-bit settling for fast-changing analog inputs before conversion starts. |
| SNR | 69 dB min (71 dB typ) - determines usable dynamic range for audio/sensor signals at 1 kHz input. |
| Power (Normal Mode) | 8 mW typ at +25°C - compatible with 3.3 V supply and low-thermal-budget embedded designs. |
| Power (Power-Save Mode) | 1 mW typ at +25°C - reduces average system power in duty-cycled portable applications. |
| Input Ranges | 0 to VREF (unipolar) or ±VREF (bipolar) - configurable via external pin connections without external components. |
Pinout & Package
AD7883BR-REEL is housed in a 24-lead small-outline integrated circuit (SOIC) package, 0.3 inch wide, RoHS-compliant, with standard JEDEC MS-013AC footprint and 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA / VINB | Analog Input Pair | Selects unipolar (VINA=VIN, VINB=VIN) or bipolar (VINA=VIN, VINB=VREF) input configuration per Figure 4/5. |
| AGND / DGND | Separate Ground Planes | Isolates analog reference path from digital switching noise; requires star-grounding at AGND pin. |
| VREF | Reference Input | Tied to VDD for specified performance; supports down to 2.5 V with degraded specs. |
| CONVST | Asynchronous Start | Rising-edge-triggered; places track/hold into hold mode independently of CLKIN, CS, or RD timing. |
| BUSY | Status Output | Active-low open-drain signal indicating conversion in progress; synchronizes read timing. |
| CS / RD | Parallel Interface Control | Joint low enables DB0–DB11 three-state outputs; decouples data access from conversion cycle. |
| MODE | Power Management | Logic low enables 1 mW power-save mode; requires dummy conversion before first valid read post-wake. |
| CLKIN | System Clock Input | 2 MHz TTL-compatible clock; 40/60–60/40 duty cycle acceptable; accuracy degrades below 2 MHz due to hold capacitor leakage. |
| DB0–DB11 | Parallel Data Outputs | 12-bit straight-binary output; high-impedance when CS or RD is high; 10 pF max floating capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3 V Supply Operation | Eliminates dual-rail supplies and level shifters in portable designs; guaranteed over 3 V–3.6 V range. |
| Integrated Track/Hold Amplifier | 5 µs acquisition time enables accurate sampling of 25 kHz full-power signals without external components. |
| Configurable Input Ranges | Hardware-selectable 0–VREF (unipolar) or ±VREF (bipolar) modes via VINA/VINB connection - no external resistors needed. |
| Low-Power Power-Save Mode | Reduces quiescent current to 250 µA typical; ideal for intermittent-sampling applications like remote sensor nodes. |
| Dynamic Performance Specified | Full AC characterization including SNR (69 dB min), THD (–80 dB typ), and IMD (–80 dB typ) supports signal integrity validation. |
| LC2MOS Process Technology | Combines bipolar precision for ADC core with CMOS logic efficiency - achieves 70 dB SNR at 8 mW. |
Applications
| Laptop Computer Battery Monitoring | Portable Medical ECG Front-End |
|---|---|
Use Scenario: Real-time monitoring of Li-ion battery voltage and current during charge/discharge cycles under varying load conditions. IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs (shunt voltage, thermistor, cell voltage) with 12-bit resolution and 50 kHz sampling for state-of-charge estimation. Use Value: 5 µs track/hold acquisition captures transient voltage dips during CPU burst loads; 1 mW power-save mode extends runtime between conversions. | Use Scenario: Digitizing low-amplitude, high-impedance biopotential signals (0.5–5 mV ECG) with minimal added noise in handheld diagnostic devices. IC Role / Device Role / Timing Role: SAR ADC provides DC-coupled, low-latency conversion with bipolar ±3.3 V input range to accommodate electrode offset voltages. Use Value: 70 dB SNR ensures clean signal capture above thermal noise floor; separate AGND/DGND pins enable clean analog grounding per medical EMC requirements. |
| Industrial Handheld Data Logger | Audio Signal Sampling in Field Recorder |
Use Scenario: Multi-channel environmental sensing (temperature, humidity, pressure) in battery-operated field instruments with scheduled wake-up intervals. IC Role / Device Role / Timing Role: ADC performs synchronized conversions across channels using shared CONVST, with MODE pin cycled to minimize average power. Use Value: Power-save mode cuts average consumption to ~1 mW; 15 µs conversion time allows >60 kSps aggregate rate across 4 channels. | Use Scenario: Capturing speech or ambient sound in compact voice recorders requiring low-noise, low-power digitization at CD-quality rates. IC Role / Device Role / Timing Role: ADC operates at 50 kHz sampling to support 20 kHz audio bandwidth with oversampling margin. Use Value: 69 dB SNR and –80 dB THD preserve harmonic integrity; SOIC-24 package enables dense PCB layout with isolated analog/digital sections. |
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, 2.7–5.25 V supply | Higher speed but lower resolution; serial interface reduces pin count but increases software overhead | Choose for cost-sensitive, space-constrained designs where 8-bit resolution suffices and SPI is preferred. |
| MAX1113EPA+ | 12-bit resolution, 100 kSPS, 2.7–3.6 V supply, internal reference, 8-pin DIP | Faster throughput and integrated reference simplify BOM; smaller package but no bipolar input support | Choose when unipolar-only operation and faster sampling are required, and board space is limited. |
Compared with ADS7822U and MAX1113EPA+, the AD7883BR-REEL offers superior SNR (69 dB vs. ~60 dB) and hardware-configurable bipolar input - critical for sensor offset handling - while maintaining identical SOIC-24 footprint and 3.3 V compatibility.
Availability
AD7883BR-REEL is available at Aetrix Electronics and suitable for battery-powered portable systems, laptop computer subsystems, and industrial handheld data loggers requiring stable component supply and long-term lifecycle support.
Supply support for AD7883BR-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7883BR-REEL belongs to Analog Devices' precision SAR ADC product line, engineered for low-power, high-accuracy digitization in portable and battery-constrained applications.
FAQ
What is the maximum sampling frequency supported by the AD7883BR-REEL?
The AD7883BR-REEL supports a maximum throughput rate of 50 kHz, corresponding to a minimum conversion period of 20 µs (15 µs conversion + 5 µs track/hold acquisition). This allows full-power signal capture up to 25 kHz per the Nyquist–Shannon sampling theorem. The device is specified and tested at 2 MHz CLKIN; reducing clock frequency degrades linearity due to hold capacitor leakage.
How does the MODE pin affect power consumption in the AD7883BR-REEL?
The MODE pin controls power state: logic high enables normal operation (8 mW typ), while logic low activates power-save mode (1 mW typ). After waking from power-save, the AD7883BR-REEL requires one dummy conversion to reset internal logic before valid data can be read. This behavior is documented in the Power-Down Control section of the AD7883BR-REEL datasheet.
Can the AD7883BR-REEL accept bipolar input signals, and how is it configured?
Yes, the AD7883BR-REEL supports ±VREF bipolar input range. Configuration requires connecting VINB to VREF (not AGND) and VINA to the signal source, as shown in Figure 5 of the AD7883BR-REEL datasheet. In this mode, the output code is straight binary with 1 LSB = 1.6 mV (for VREF = 3.3 V), spanning –3.3 V to +3.3 V.
What are the recommended PCB layout practices for optimal performance of the AD7883BR-REEL?
Optimal AD7883BR-REEL performance requires strict analog/digital partitioning: separate AGND and DGND planes tied at a single star point near the AGND pin; short, guarded analog input traces referenced to AGND; wide, low-impedance power traces; and avoidance of digital signal routing adjacent to analog paths. Switching regulators must be isolated, and decoupling capacitors (10 µF + 0.1 µF) placed close to VDD and AGND.
Does the AD7883BR-REEL require an external reference voltage, or can it use its supply rail?
The AD7883BR-REEL is specified for optimal performance when VREF is tied directly to VDD (3.3 V nominal). While it operates with VREF as low as 2.5 V, doing so degrades SNR, linearity, and other dynamic specifications. The AD7883BR-REEL draws up to 1.2 mA from VREF, so the supply must be adequately decoupled and low-noise.
AD7883BR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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-REEL FAQ
1.How can I place an order for AD7883BR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7883BR-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 AD7883BR-REEL reliable?
The price and inventory of AD7883BR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7883BR-REEL is usually 5 days.
3.What payment methods are accepted for AD7883BR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7883BR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7883BR-REEL?
AD7883BR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7883BR-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 AD7883BR-REEL?
For technical support, including AD7883BR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7883BR-REEL requirements.
6.How does Aetrix verify that AD7883BR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7883BR-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 AD7883BR-REEL meets industry standards.
7.What is the process for return or replacement of AD7883BR-REEL?
All AD7883BR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7883BR-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 AD7883BR-REEL part is unused and in its original packaging.
Return procedure for AD7883BR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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