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Analog Devices Inc. AD7898ARZ-10REEL
- Part No.:
- AD7898ARZ-10REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7898ARZ-10REEL.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,658
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Product details
Overview
AD7898ARZ-10REEL from Analog Devices is a 12-bit successive-approximation ADC with 220 kSPS throughput, ±10 V bipolar input range, single 5 V supply operation, and integrated track/hold amplifier - designed for precision data acquisition in industrial instrumentation and sensor interface systems.
For engineers reviewing the AD7898ARZ-10REEL datasheet, AD7898ARZ-10REEL pinout, AD7898ARZ-10REEL application, or AD7898ARZ-10REEL equivalent, this page delivers verified specifications, SOIC-8 pin mapping, dual-mode serial interface timing, power-down capability in Mode 1, and real-world SNR (71 dB), THD (–78 dB), and full-power bandwidth (3.6 MHz) values.
Technical Context
The AD7898ARZ-10REEL implements a laser-trimmed internal oscillator for Mode 0 operation (CONVST-triggered, 3.3 µs conversion time) and supports external SCLK-synchronized Mode 1 (16-cycle conversion, up to 3.7 MHz clock, power-down enabled). Its analog front-end uses a resistive ladder network (R1=30 kΩ, R2=7.5 kΩ, R3=10 kΩ) to scale ±10 V inputs while maintaining high input impedance (24 kΩ min) and low dynamic charge injection.
It features a two's complement 16-bit serial output (4 leading zeros + 12-bit result), VDRIVE-pin decoupled logic interface (2.7–5.25 V compatible), buffered 2.5 V reference input (±5% tolerance), and guaranteed no missing codes across its –40°C to +85°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits with guaranteed no missing codes - ensures monotonicity and deterministic code transitions in closed-loop control. |
| Throughput Rate | 220 kSPS maximum in both Mode 0 and Mode 1 - supports real-time sampling of signals up to ~35 kHz Nyquist bandwidth. |
| Analog Input Range | ±10 V (AD7898-10 variant) - enables direct interfacing with industrial ±10 V sensor outputs without external scaling. |
| Signal-to-Noise+Distortion | 71 dB min at 30 kHz - corresponds to ~11.8 effective number of bits (ENOB) for high-fidelity waveform capture. |
| Power Dissipation | 22.5 mW max at 5 V - enables use in thermally constrained or battery-backed DAQ modules. |
| Reference Input | 2.5 V ±5% buffered - allows stable operation with low-drift references like AD780, reducing system calibration burden. |
| Full-Power Bandwidth | 3.6 MHz @ 3 dB (AD7898-10) - supports subsampling of IF signals in communications test equipment. |
Pinout & Package
AD7898ARZ-10REEL is housed in an 8-lead SOIC package (R-8, RoHS-compliant, Pb-free). Pin functions are validated per Analog Devices' official pin configuration diagram and functional descriptions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Voltage reference input | Buffered 2.5 V ±5% reference node; requires 0.1 µF local decoupling for noise immunity and stability. |
| 2 - VIN | Analog input channel | Accepts ±10 V differential input (AD7898-10); high-impedance (>24 kΩ) resistive ladder front-end eliminates dynamic loading on signal sources. |
| 3 - GND | Analog ground reference | Common return for track/hold, comparator, DAC, and digital circuitry - must be connected to clean analog ground plane. |
| 4 - SCLK | Serial clock input | Controls data readout timing; in Mode 1 also serves as conversion clock source (up to 3.7 MHz) and enables power-down. |
| 5 - SDATA | Serial data output | 16-bit two's complement output (4 leading zeros + 12-bit result), MSB-first, three-state after final bit - compatible with SPI and custom controllers. |
| 6 - VDRIVE | Logic interface supply | Defines I/O voltage level (2.7–5.25 V); allows direct connection to 3 V microcontrollers independent of 5 V VDD rail. |
| 7 - CS / CONVST | Chip select / convert start | Mode-dependent: falling edge initiates conversion in Mode 0 (CONVST), active-low frames serial transfer in Mode 1 (CS). |
| 8 - VDD | Analog/digital power supply | Single 4.75–5.25 V supply powering all internal blocks; requires local 0.1 µF + 10 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode serial interface | Mode 0 (internal clock, CONVST-triggered) and Mode 1 (SCLK-synchronized, power-down capable) - simplifies integration into both fixed-timing and low-power embedded systems. |
| On-chip track/hold amplifier | Acquisition time <520 ns (AD7898-10); eliminates need for external sample-and-hold, reducing BOM count and layout complexity. |
| VDRIVE logic-level independence | Separate 2.7–5.25 V logic supply enables seamless interfacing with 3 V processors while VDD remains at 5 V - avoids level-shifter components. |
| Bipolar ±10 V input range | Direct support for industrial standard signal levels without external op-amp gain stages - improves SNR by avoiding amplification noise. |
| Low power consumption | 22.5 mW max operational, 25 µW in power-down mode - extends battery life in portable test equipment and remote sensors. |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous acquisition of ±10 V analog outputs from pressure, temperature, and flow transmitters in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC converting sensor signals to digital for real-time PID loop execution and HMI display updates. Use Value: 220 kSPS throughput and 71 dB SNR enable accurate capture of transient events (e.g., valve slam) without aliasing or quantization distortion. |
Use Scenario: Digitizing waveforms in handheld oscilloscopes and portable signal analyzers requiring compact, low-power signal chain. IC Role / Device Role / Timing Role: High-speed sampling front-end with integrated track/hold, eliminating external S/H and reducing board area. Use Value: 3.6 MHz full-power bandwidth and Mode 1 power-down allow subsampling of RF IF signals and extended battery runtime. |
| Automotive Sensor Interface | Medical Instrumentation |
Use Scenario: Reading calibrated ±10 V outputs from engine knock sensors and exhaust gas oxygen sensors in ECU diagnostic modules. IC Role / Device Role / Timing Role: Precision ADC with robust ESD protection (2.5 kV HBM) and –40°C to +85°C operation for under-hood environments. Use Value: Guaranteed no missing codes and ±1 LSB relative accuracy ensure reliable detection of critical fault thresholds across temperature extremes. |
Use Scenario: Converting analog outputs from biopotential amplifiers (ECG, EEG) in portable patient monitors with strict power budgets. IC Role / Device Role / Timing Role: Low-noise, low-power ADC with 2.5 V reference compatibility for high-resolution biosignal digitization. Use Value: 71 dB SINAD and 12-bit resolution support >100 dB dynamic range required for detecting microvolt-level neural activity. |
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 |
|---|---|---|---|
| AD7490BRUZ | 16-bit, 1 MSPS, 2.7–5.25 V supply, no internal track/hold, ±10 V input requires external amplifier | Higher resolution but lacks integrated track/hold and bipolar ±10 V input - demands additional signal conditioning circuitry | Select when ENOB >12 bits is required and board space permits external amplification. |
| ADS7822U | 12-bit, 200 kSPS, 2.7–5.25 V supply, SPI-compatible, ±10 V input not supported - max ±5 V with external scaling | Lower power (12 mW), smaller MSOP-8 package, but requires external resistor network for ±10 V range | Select for ultra-low-power, space-constrained designs where ±5 V input suffices or external scaling is acceptable. |
Compared with AD7898ARZ-10REEL, AD7490BRUZ offers higher resolution but increases system complexity due to missing track/hold and input scaling; ADS7822U reduces power and size but sacrifices native ±10 V support - making AD7898ARZ-10REEL optimal for drop-in industrial sensor interfaces requiring minimal external components.
Availability
AD7898ARZ-10REEL is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, and automotive sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7898ARZ-10REEL 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7898 product line delivers compact, single-supply 12-bit SAR ADCs with integrated track/hold and flexible serial interfaces - engineered specifically for space- and power-constrained industrial and instrumentation systems.
FAQ
What is the maximum sampling rate supported by the AD7898ARZ-10REEL?
The AD7898ARZ-10REEL supports a maximum throughput rate of 220 kSPS in both Mode 0 (internal clock) and Mode 1 (external SCLK). In Mode 1, this requires an SCLK frequency up to 3.7 MHz; in Mode 0, the internal oscillator delivers consistent 220 kSPS performance with VDRIVE = 5 V ±5%. The AD7898ARZ-10REEL achieves this while maintaining 71 dB SNR and ±1 LSB linearity across its full operating temperature range.
Does the AD7898ARZ-10REEL require an external reference voltage?
Yes, the AD7898ARZ-10REEL requires an external 2.5 V ±5% reference applied to the REF IN pin. The reference input is buffered on-chip, and a 0.1 µF capacitor must be placed locally for stability. The AD7898ARZ-10REEL does not include an internal reference; using a precision reference such as the AD780 ensures full specified performance including ±1 LSB relative accuracy and 71 dB SNR.
What is the function of the VDRIVE pin on the AD7898ARZ-10REEL?
The VDRIVE pin on the AD7898ARZ-10REEL sets the logic voltage level for the serial interface (SCLK, CS/CONVST, SDATA), independent of the 5 V VDD supply. It accepts 2.7–5.25 V, enabling direct connection to 3 V microcontrollers without level shifters. This separation ensures robust timing margins and eliminates I/O voltage conflicts - a key design advantage confirmed in the AD7898ARZ-10REEL's Mode 0 and Mode 1 timing specifications.
Can the AD7898ARZ-10REEL operate with a ±2.5 V input range?
No - the AD7898ARZ-10REEL is the -10 variant and is factory-configured for ±10 V input range only. The ±2.5 V input range is exclusive to the AD7898-3 variants (e.g., AD7898ARZ-3REEL). Attempting to apply ±2.5 V signals to the AD7898ARZ-10REEL will result in reduced dynamic range and degraded linearity; the internal resistor ladder (R1=30 kΩ, R2=7.5 kΩ, R3=10 kΩ) is optimized for ±10 V scaling.
Is the AD7898ARZ-10REEL RoHS-compliant and lead-free?
Yes, the "Z" suffix in AD7898ARZ-10REEL explicitly denotes RoHS-compliant, lead-free construction per Analog Devices' ordering guide. It is packaged in an 8-lead SOIC (R-8) with matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements. The device is rated for –40°C to +85°C operation and carries 2.5 kV HBM ESD rating.
AD7898ARZ-10REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 220k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7898ARZ-10REEL FAQ
1.How can I place an order for AD7898ARZ-10REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7898ARZ-10REEL 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 AD7898ARZ-10REEL reliable?
The price and inventory of AD7898ARZ-10REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7898ARZ-10REEL is usually 5 days.
3.What payment methods are accepted for AD7898ARZ-10REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7898ARZ-10REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7898ARZ-10REEL?
AD7898ARZ-10REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7898ARZ-10REEL 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 AD7898ARZ-10REEL?
For technical support, including AD7898ARZ-10REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7898ARZ-10REEL requirements.
6.How does Aetrix verify that AD7898ARZ-10REEL is sourced from the original manufacturer or authorized distributors?
All AD7898ARZ-10REEL 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 AD7898ARZ-10REEL meets industry standards.
7.What is the process for return or replacement of AD7898ARZ-10REEL?
All AD7898ARZ-10REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7898ARZ-10REEL, 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 AD7898ARZ-10REEL part is unused and in its original packaging.
Return procedure for AD7898ARZ-10REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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