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Analog Devices Inc. AD7880BR-REEL
- Part No.:
- AD7880BR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7880BR-REEL.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
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Product details
Overview
AD7880BR-REEL from Analog Devices is a 12-bit monolithic successive-approximation ADC operating from a single +5 V supply, featuring 12 µs conversion time, 3 µs track/hold acquisition, and 70 dB SNR at 66 kHz sampling rate. It supports unipolar (0 V to +5 V, 0 V to +10 V) and bipolar (±5 V) input ranges and targets high-speed data acquisition in portable instrumentation and DSP systems.
For engineers reviewing the AD7880BR-REEL datasheet, AD7880BR-REEL pinout, AD7880BR-REEL application, or AD7880BR-REEL equivalent, key selection considerations include its LC2MOS process-based low-power operation (2 mW in power-save mode), SOIC-24 package compatibility, three-state parallel digital interface, and support for microprocessor/DSP interfacing without external timing components.
Technical Context
The AD7880BR-REEL integrates a charge-balanced comparator that provides an inherent track-and-hold function, enabling full 12-bit acquisition in ≤3 µs. Its SAR architecture uses a fast-settling voltage-output DAC and operates synchronously with a 2.5 MHz external clock, delivering a total throughput time of 15 µs (12 µs conversion + 3 µs acquisition).
Input range selection is achieved via internal resistor networks and external pin configuration (VINA/VINB/VREF), allowing operation across 0 V to +5 V, 0 V to +10 V, and ±5 V without external op amps. The MODE pin controls power state: logic high enables normal operation (25 mW typ), logic low activates power-save mode (2 mW typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes with straight-binary encoding |
| Conversion Time | 12 µs max - enables ≥33 kHz full-power signal sampling at 66 kHz throughput |
| SNR | 70 dB min - ensures clean digitization of audio and communication band signals |
| Power Dissipation (Normal) | 25 mW typ at +25°C - compatible with thermally constrained embedded designs |
| Power Dissipation (Power-Save) | 2 mW typ at +25°C - extends battery life in portable measurement equipment |
| Analog Input Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V - selectable via VINA/VINB/VREF connections, no external scaling required |
| Data Access Time | 57 ns - supports direct connection to 16-bit microprocessors (e.g., MC68000, TMS320C25) without wait states |
Pinout & Package
AD7880BR-REEL is housed in a 24-lead Small Outline Integrated Circuit (SOIC) package, 0.3 inch wide, RoHS-compliant, and optimized for surface-mount assembly on space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Analog Input A | Primary analog input node; used with VINB and VREF to configure unipolar/bipolar ranges per Figures 5–7 |
| VINB | Analog Input B | Secondary analog reference node; determines input range polarity and scaling when tied to AGND or VREF |
| AGND | Analog Ground | Reference return for analog circuitry; must be isolated from DGND to minimize noise coupling |
| VREF | Reference Input | Accepts 2.5 V to 5 V; typically tied to VDD for specified performance; sets full-scale range |
| CS | Chip Select | Active-low enable for data bus; must be low with RD low to assert DB0–DB11 outputs |
| CONVST | Convert Start | Rising-edge-triggered asynchronous control; initiates track-to-hold transition and conversion cycle |
| RD | Read Strobe | Active-low signal enabling parallel data output; latches conversion result onto DB0–DB11 |
| BUSY | Conversion Status | Active-low open-drain output; remains low during conversion; signals completion when high |
| CLKIN | External Clock Input | TTL/CMOS-compatible 2.5 MHz clock source; mark/space ratio 40/60 to 60/40 accepted |
| DGND | Digital Ground | Return path for logic I/O; requires separate plane from AGND with single-point connection |
| DB0–DB11 | Parallel Data Outputs | Three-state, 12-bit straight-binary output bus; driven only when CS and RD are low |
| MODE | Power Mode Control | Logic high = normal operation (25 mW); logic low = power-save mode (2 mW) |
| VDD | +5 V Supply | Nominal +5 V ±5%; powers both analog and digital sections; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Single +5 V supply operation | Eliminates need for dual ±5 V rails or charge pumps, reducing BOM count and layout complexity |
| On-chip track/hold amplifier | 3 µs acquisition time enables accurate sampling of 12-bit signals without external THA |
| Multiple input range support | Hardware-configurable 0 V to +5 V, 0 V to +10 V, and ±5 V ranges using only VINA/VINB/VREF pins |
| Fast parallel interface | 57 ns data access time allows direct connection to 16-bit microprocessors without glue logic |
| LC2MOS fabrication process | Combines precision bipolar analog front-end with low-power CMOS logic for optimal SNR/power trade-off |
Applications
| Portable Data Logger | DSP-Based Audio Acquisition |
|---|---|
Use Scenario: Battery-powered field instrument capturing sensor data (temperature, pressure, vibration) at up to 33 kHz. IC Role / Device Role / Timing Role: Primary ADC performing synchronized sampling with microcontroller-triggered CONVST pulses. Use Value: 2 mW power-save mode extends runtime; SOIC-24 footprint fits compact enclosures; 70 dB SNR preserves dynamic range in noisy environments. |
Use Scenario: Real-time audio front-end for voice recognition system sampling at 66 kHz with anti-alias filtering. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital converter interfaced directly to ADSP-2100 via BUSY-interrupt handshake. Use Value: 12 µs conversion + 3 µs acquisition enables tight sample-jitter control; ±5 V input handles balanced microphone preamp outputs. |
| Industrial Modem Front-End | Automated Test Equipment (ATE) |
Use Scenario: High-speed modem implementing QAM demodulation with analog IF signal digitization. IC Role / Device Role / Timing Role: ADC acquiring baseband or IF signals with precise timing alignment to CLKIN and CONVST. Use Value: –80 dB THD and –80 dB IMD ensure minimal spectral distortion; 0 V to +10 V range accommodates wide-dynamic-range IF stages. |
Use Scenario: Modular ATE slot card digitizing DUT output waveforms under PC-controlled trigger sequences. IC Role / Device Role / Timing Role: Standalone sampling node accepting external CONVST and RD strobes from test controller FPGA. Use Value: Three-state DB0–DB11 bus allows shared backplane routing; 57 ns access time enables high-throughput data streaming to memory buffers. |
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 |
|---|---|---|---|
| AD7888BRZ | 8-channel, serial SPI interface; 100 kSPS; 71 dB SNR; same SOIC-24 package | Replaces parallel bus with daisy-chainable serial interface; suited for multiplexed multi-sensor systems | Select when channel count >1 and board space or wiring count is constrained; requires SPI host firmware changes |
| ADS7822U | 12-bit, 200 kSPS, SPI interface, 3.3 V supply; 70 dB SNR; MSOP-8 package | Lower voltage, smaller footprint, higher speed; lacks bipolar input and on-chip track/hold | Select for 3.3 V systems with space limits; requires external THA and level-shifting for ±5 V inputs |
Compared with AD7880BR-REEL, AD7888BRZ offers higher channel density and serial flexibility but sacrifices parallel bus simplicity, while ADS7822U reduces size and supply voltage at the cost of missing integrated track/hold and bipolar input capability-making AD7880BR-REEL optimal for fixed-input, microprocessor-connected, low-power 12-bit acquisition.
Availability
AD7880BR-REEL is available at Aetrix Electronics and suitable for portable instrumentation, DSP-based audio acquisition, industrial modems, automated test equipment, and battery-powered data loggers requiring stable component supply across extended product lifecycles.
Supply support for AD7880BR-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7880BR-REEL belongs to Analog Devices' legacy LC2MOS precision ADC family, designed specifically for low-power, single-supply, high-speed data acquisition in portable and embedded systems where thermal and board-space constraints are critical.
FAQ
What is the maximum sampling rate supported by the AD7880BR-REEL?
The AD7880BR-REEL supports a maximum throughput rate of 66 kHz, corresponding to a minimum total cycle time of 15 µs (12 µs conversion + 3 µs track/hold acquisition). This allows full-power signal sampling up to 33 kHz per Nyquist criterion. Performance is guaranteed with a 2.5 MHz CLKIN; reducing clock frequency degrades linearity due to hold-capacitor leakage.
Does the AD7880BR-REEL require external components for basic operation?
No, the AD7880BR-REEL requires only a 2.5 MHz external clock source and standard power supply decoupling capacitors (typically 0.1 µF ceramic near VDD and AGND/DGND pins). It integrates a track/hold amplifier, reference buffer, and SAR core-no external op amps, resistors, or timing ICs are needed for unipolar or bipolar input configurations.
How does the MODE pin affect power consumption in the AD7880BR-REEL?
The MODE pin directly controls power state: when pulled to VDD, AD7880BR-REEL operates in normal mode (25 mW typ at +25°C); when pulled to 0 V, it enters power-save mode (2 mW typ at +25°C). This feature enables rapid wake-up (<1 µs) and is ideal for duty-cycled acquisition in battery-powered devices without sacrificing conversion accuracy.
Can the AD7880BR-REEL interface directly with a 16-bit microprocessor like the MC68000?
Yes, the AD7880BR-REEL's 57 ns data access time and three-state parallel DB0–DB11 bus allow direct connection to the MC68000. As shown in Figure 18 of the datasheet, CS drives DTACK, AS/R/W generate RD, and BUSY can optionally trigger interrupts-enabling standard MOVE.W instructions without wait-state insertion or address decoding logic.
What analog input ranges does the AD7880BR-REEL support, and how are they selected?
The AD7880BR-REEL supports three hardware-configured input ranges: 0 V to +5 V, 0 V to +10 V, and ±5 V. Selection is determined by connections among VINA, VINB, and VREF per Figures 5–7. For example, tying VINB to AGND and VREF to VDD configures the 0 V to +10 V range; tying VINB to VREF configures ±5 V. No software or register writes are involved.
AD7880BR-REEL 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:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 66k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Supply
- 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:
- -
AD7880BR-REEL FAQ
1.How can I place an order for AD7880BR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7880BR-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 AD7880BR-REEL reliable?
The price and inventory of AD7880BR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7880BR-REEL is usually 5 days.
3.What payment methods are accepted for AD7880BR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7880BR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7880BR-REEL?
AD7880BR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7880BR-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 AD7880BR-REEL?
For technical support, including AD7880BR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7880BR-REEL requirements.
6.How does Aetrix verify that AD7880BR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7880BR-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 AD7880BR-REEL meets industry standards.
7.What is the process for return or replacement of AD7880BR-REEL?
All AD7880BR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7880BR-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 AD7880BR-REEL part is unused and in its original packaging.
Return procedure for AD7880BR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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