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Analog Devices Inc. AD7880CRZ-REEL
- Part No.:
- AD7880CRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7880CRZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
AD7880CRZ-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 is used in battery-powered portable instrumentation and high-speed modem front-ends.
For engineers reviewing the AD7880CRZ-REEL datasheet, AD7880CRZ-REEL pinout, AD7880CRZ-REEL application, or AD7880CRZ-REEL equivalent, key selection criteria include its LC2MOS process-based low-power operation (2 mW in power-save mode), 24-lead SOIC package compatibility, three-state parallel data interface, and verified dynamic performance across speech recognition and DSP signal chains.
Technical Context
The AD7880CRZ-REEL integrates a charge-balanced comparator enabling inherent track-and-hold functionality, a 12-bit voltage-output DAC, and TTL-compatible control logic. Its conversion cycle initiates on the rising edge of CONVST and completes in ≤12 µs using a 2.5 MHz external clock, with BUSY signaling active-low status during conversion.
It uses an internal resistor network to configure analog input ranges without external components, accepts VREF = VDD (5 V ±5%) for full specification compliance, and maintains monotonicity with ±1 LSB differential nonlinearity across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with straight binary encoding |
| Conversion Time | 12 µs max - enables ≥66 kHz sustained sampling rate with minimal dead time |
| Track/Hold Acquisition | 3 µs max - captures full-scale 12-bit signals before conversion starts |
| SNR | 70 dB min at 1 kHz input, 66 kHz sample rate - ensures clean spectral fidelity for audio and telecom signals |
| Power Dissipation | 25 mW typ in normal mode, 2 mW typ in power-save mode - supports extended battery life in portable systems |
| Input Ranges | 0 V to 5 V, 0 V to 10 V, ±5 V - selectable via VINA/VINB/VREF connections, no external op amps required |
| Integral Nonlinearity | ±1 LSB max - guarantees accurate end-point linearity for precision measurement |
Pinout & Package
AD7880CRZ-REEL is housed in a 24-lead small-outline integrated circuit (SOIC) package with standard 0.3-inch width, gull-wing leads, and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA | Analog Input A | Primary analog signal input; configured with VINB and VREF to select 0–5 V, 0–10 V, or ±5 V range |
| VINB | Analog Input B | Reference node for input attenuation network; tied to AGND or VREF depending on selected range |
| AGND | Analog Ground | Separate ground 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; defines full-scale voltage |
| 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 command; initiates track-to-hold transition and conversion sequence |
| RD | Read Strobe | Active-low control that latches conversion result onto DB0–DB11 when CS is low |
| BUSY | Status Output | Active-low open-drain indicator; remains low throughout conversion, high when data is valid |
| CLKIN | Clock Input | TTL/CMOS-compatible 2.5 MHz clock source; mark/space ratio 40/60 to 60/40 accepted |
| DGND | Digital Ground | Dedicated ground for logic and output drivers; requires separate PCB pour from AGND |
| DB0–DB11 | Data Outputs | Three-state parallel 12-bit bus; outputs float when CS or RD is high |
| MODE | Power Mode Control | Logic-high (VDD) enables normal operation; logic-low (0 V) activates 2 mW power-save mode |
| VDD | Supply Voltage | +5 V ±5% single supply; powers both analog and digital sections; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| LC2MOS Process Integration | Combines precision bipolar analog front-end with low-power CMOS logic-enables 12-bit accuracy and 2 mW standby without external support circuitry |
| Multiple Input Range Support | Hardware-configurable 0–5 V, 0–10 V, and ±5 V ranges using only VINA/VINB/VREF wiring-eliminates need for external gain/level-shift amplifiers |
| Fast Bus Access Time | 57 ns data access after RD assertion-allows direct interfacing with ADSP-2100, TMS320C25, and MC68000 without wait states |
| Guaranteed Monotonicity | ±1 LSB differential nonlinearity over full temperature range-ensures no code misses in closed-loop control applications |
| On-Chip Track/Hold | 3 µs acquisition time with no external components-reduces system BOM and layout complexity for high-frequency signal capture |
Applications
| Portable Data Acquisition | DSP-Based Speech Processing |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor node acquiring analog sensor outputs under battery constraint. IC Role / Device Role / Timing Role: Primary 12-bit sampling ADC capturing conditioned transducer signals at up to 66 kHz with minimal power draw. Use Value: 2 mW power-save mode extends runtime; 3 µs track/hold enables accurate capture of fast transients without external hold circuitry. | Use Scenario: Front-end digitization in voice codec or speaker recognition module using TI TMS320C25 DSP. IC Role / Device Role / Timing Role: Synchronized analog-to-digital converter interfaced via STRB/RD logic to feed real-time FFT and feature extraction pipelines. Use Value: 57 ns bus access and 70 dB SNR preserve speech spectral integrity; parallel 12-bit output avoids serial overhead in latency-critical paths. |
| Industrial Modem Analog Front-End | High-Speed Instrumentation Control |
Use Scenario: Line card in DSL or ISDN modem requiring precise analog signal conditioning prior to digital baseband processing. IC Role / Device Role / Timing Role: High-fidelity ADC converting line-level analog signals into 12-bit words for QAM demodulation algorithms. Use Value: ±1 LSB INL and –80 dB THD ensure minimal distortion in multi-tone test conditions; 0–10 V range accommodates legacy line driver outputs. | Use Scenario: Closed-loop position feedback in servo drive where analog encoder or resolver output must be sampled synchronously with PWM cycles. IC Role / Device Role / Timing Role: Deterministic-latency ADC triggered by microcontroller timer to align sampling with motor commutation events. Use Value: Asynchronous CONVST allows jitter-free sampling alignment; BUSY flag enables polling-free interrupt-driven readout. |
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, 12-bit SAR ADC with serial SPI interface; 3.3 V or 5 V supply; 1 µs conversion time | Designed for multiplexed multi-sensor systems; lacks parallel bus and ±5 V bipolar input support | Select when channel count >1 and board space or wiring count is constrained; not drop-in for AD7880CRZ-REEL's parallel interface |
| MAX1113ECPP | 12-bit, 100 kSPS SAR ADC; single +5 V supply; 28-pin PDIP; no built-in track/hold | Requires external track/hold amplifier; lower SNR (68 dB); higher typical power (30 mW) | Consider for cost-sensitive industrial designs where 3 µs acquisition time is relaxed and external THA is acceptable |
Compared with AD7880CRZ-REEL, AD7888BRZ offers higher channel density and faster conversion but sacrifices bipolar input flexibility and parallel throughput; MAX1113ECPP provides similar resolution and supply but demands external support circuitry and delivers lower dynamic performance.
Availability
AD7880CRZ-REEL is available at Aetrix Electronics and suitable for battery-powered portable systems, digital signal processing subsystems, and high-speed modem analog front-ends requiring stable component supply across extended production lifecycles.
Supply support for AD7880CRZ-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 Wilmington, MA, with design and manufacturing expertise spanning precision data conversion, amplification, and power management.
The AD7880CRZ-REEL belongs to Analog Devices' LC2MOS precision ADC product line, engineered for low-power, high-speed sampling in portable and real-time signal acquisition systems where single-supply operation and hardware-configurable input ranges are critical.
FAQ
What is the maximum sampling rate supported by the AD7880CRZ-REEL?
The AD7880CRZ-REEL supports a maximum sustained sampling rate of 66 kHz, achieved with a 2.5 MHz CLKIN and total throughput time of 15 µs (12 µs conversion + 3 µs track/hold acquisition). This rate is validated across the full –40°C to +85°C operating range and applies to full-power sine wave inputs per the datasheet's dynamic test conditions.
Does the AD7880CRZ-REEL require an external track-and-hold amplifier?
No, the AD7880CRZ-REEL does not require an external track-and-hold amplifier. Its charge-balanced comparator architecture provides an inherent track/hold function with 3 µs acquisition time to 12-bit accuracy. The device achieves full-scale settling without external components, as confirmed in the Functional Block Diagram and Circuit Information section of the datasheet.
How is bipolar input range (±5 V) configured on the AD7880CRZ-REEL?
The ±5 V bipolar input range on the AD7880CRZ-REEL is configured by connecting VREF to VDD (5 V), VINB to VREF, and applying the analog signal to VINA. This configuration is explicitly shown in Figure 7 and Table II of the datasheet, and delivers straight-binary output coding with 1 LSB = 2.44 mV across –5 V to +5 V full scale.
What is the power consumption of the AD7880CRZ-REEL in power-save mode?
In power-save mode (MODE = 0 V), the AD7880CRZ-REEL consumes 2 mW typical at +25°C, corresponding to 750 µA maximum IDD. Over the full –40°C to +85°C range, power dissipation remains ≤5 mW (1 mA max IDD), making it suitable for ultra-low-power portable applications where duty-cycled sampling is employed.
Can the AD7880CRZ-REEL interface directly with the ADSP-2100 DSP?
Yes, the AD7880CRZ-REEL interfaces directly with the ADSP-2100 DSP as documented in Figure 15 of the datasheet. Conversion is initiated asynchronously via CONVST driven by a timer, BUSY triggers an IRQ interrupt through an inverter, and data is read using the instruction "MR0 = DM(ADC)", leveraging the AD7880CRZ-REEL's 57 ns bus access time and three-state outputs.
AD7880CRZ-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:
- Active
- 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:
- ±3V, ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7880CRZ-REEL FAQ
1.How can I place an order for AD7880CRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7880CRZ-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 AD7880CRZ-REEL reliable?
The price and inventory of AD7880CRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7880CRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7880CRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7880CRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7880CRZ-REEL?
AD7880CRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7880CRZ-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 AD7880CRZ-REEL?
For technical support, including AD7880CRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7880CRZ-REEL requirements.
6.How does Aetrix verify that AD7880CRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7880CRZ-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 AD7880CRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7880CRZ-REEL?
All AD7880CRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7880CRZ-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 AD7880CRZ-REEL part is unused and in its original packaging.
Return procedure for AD7880CRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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