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Analog Devices Inc. AD7896JRZ-REEL
- Part No.:
- AD7896JRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7896JRZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,559
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Product details
Overview
AD7896JRZ-REEL from Analog Devices is a single-supply, 12-bit successive approximation ADC with 8 µs conversion time, 100 kHz throughput rate, and integrated track-and-hold amplifier and on-chip clock - designed for space-constrained data acquisition in portable instrumentation and sensor interfaces operating from 2.7 V to 5.5 V.
For engineers reviewing the AD7896JRZ-REEL datasheet, AD7896JRZ-REEL pinout, AD7896JRZ-REEL application, or AD7896JRZ-REEL equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, serial interface timing constraints, dynamic performance (70 dB SNR at 10 kHz), and real-world selection guidance for low-power, high-speed analog-to-digital conversion.
Technical Context
The AD7896JRZ-REEL implements an R-2R ladder-based SAR architecture with internal VDD-referenced conversion, eliminating external reference components. Its dual-mode operation supports high-throughput Mode 1 (8 µs conversion) and auto-sleep Mode 2 (14 µs total wake-up + conversion), triggered by CONVST pulse width and level.
It uses a 2-wire serial interface (SCLK/SDATA) with BUSY status signaling, delivering 16-bit frames (4 leading zeros + 12-bit straight binary result) synchronized to falling SCLK edges. Timing requires ≥40 ns SCLK pulse widths and enforces 400 ns minimum inter-conversion guard band for full-spec operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes over full temperature range (0°C to +70°C). |
| Conversion Time | 8 µs max (Mode 1) - enables 100 kHz sustained sampling when paired with 10 MHz SCLK and proper read timing. |
| Analog Input Range | 0 V to VDD - eliminates need for external level-shifting circuitry when powered from same rail as signal source. |
| Supply Voltage | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without LDOs or regulators. |
| Power Dissipation | 9 mW typical at 3.3 V - enables battery-powered operation with <5 µA standby current in auto-sleep mode. |
| Dynamic Performance | 70 dB SNR (fIN = 10 kHz, fSAMPLE = 100 kHz) - meets precision measurement requirements for industrial sensors and medical front-ends. |
| Differential Nonlinearity | ±1 LSB max - ensures monotonic response critical for closed-loop control and feedback systems. |
Pinout & Package
AD7896JRZ-REEL is housed in an 8-lead, 0.150" wide SOIC package (JEDEC MS-012AC), RoHS-compliant, with standard gull-wing lead form and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Accepts 0 V to VDD unipolar signals; high-impedance input (±2 µA max) enables direct connection to low-output-impedance sensors. |
| VDD | Positive supply & reference | Single 2.7–5.5 V rail powers logic and serves as ADC reference - removes external voltage reference component and layout area. |
| AGND | Analog ground | Independent ground return for track-and-hold and comparator - must be separated from DGND to maintain 70 dB SNR. |
| SCLK | Serial clock input | Asynchronous edge-triggered clock (max 10 MHz); falling edge clocks out SDATA bits - compatible with most microcontroller SPI peripherals in master mode. |
| SDATA | Serial data output | Three-state CMOS output providing 16-bit frame (4 zeros + 12-bit result, MSB first); valid 60 ns after SCLK falling edge at 5 V. |
| DGND | Digital ground | Dedicated return for digital I/O - requires star grounding or low-inductance connection to AGND at single point near device. |
| CONVST | Convert start | Edge-triggered control: falling edge initiates conversion in Mode 1; low-level hold enables auto-sleep in Mode 2 - no external timing circuitry needed. |
| BUSY | Conversion status | Open-drain or CMOS output (per version) indicating active conversion - allows polling or interrupt-driven read synchronization without SCLK dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track-and-hold | Acquires 12-bit accuracy in ≤1.5 µs - eliminates external THA and simplifies anti-aliasing filter design for DC–50 kHz inputs. |
| VDD-referenced conversion | Removes need for external reference IC or resistor divider - reduces BOM count, PCB area, and thermal drift sources. |
| Auto power-down mode | Reduces IDD to 5 µA typ (2.7 V) between conversions - extends battery life in intermittent-sampling applications like environmental monitors. |
| High-speed serial interface | 2-wire (SCLK/SDATA) with BUSY flag - minimizes GPIO usage and avoids complex parallel bus routing in dense MCU designs. |
| SOIC-8 footprint | Standard 8-pin SOIC (5.0 × 6.2 mm) - enables drop-in replacement for legacy 8-bit or 10-bit ADCs without board rework. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes measuring temperature, humidity, and pressure over extended field deployments. IC Role / Device Role / Timing Role: Primary ADC capturing conditioned analog outputs from MEMS sensors at 10–100 Hz rates with automatic sleep between samples. Use Value: 9 mW typical power and 5 µA auto-sleep current extend AA battery life beyond 12 months while maintaining 12-bit resolution and ±1 LSB DNL. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or thermocouple signals in factory automation I/O modules. IC Role / Device Role / Timing Role: Isolated analog front-end digitizer interfacing via optocoupled SCLK/SDATA lines to host controller across galvanic barrier. Use Value: VDD-referenced input range (0 V to VDD) matches common 3.3 V loop-supply rails, eliminating level-shifter ICs and reducing component count. |
| Medical Patient Monitoring Front-Ends | Test & Measurement Equipment |
|
Use Scenario: Low-noise ECG/EEG acquisition channels requiring high SNR and minimal board space in handheld diagnostic devices. IC Role / Device Role / Timing Role: High-fidelity analog digitizer with integrated track-and-hold, directly driven by ultra-low-noise instrumentation amplifiers. Use Value: 70 dB SNR at 10 kHz and ±1 LSB relative accuracy ensure clinical-grade waveform fidelity without post-processing calibration. |
Use Scenario: Benchtop multimeters and oscilloscope auxiliary channels needing fast, accurate DC and low-frequency AC measurements. IC Role / Device Role / Timing Role: Standalone ADC subsystem handling multiplexed sensor inputs with programmable sample rate up to 100 kHz. Use Value: 8 µs conversion time and 100 kHz throughput support real-time waveform capture at >10× oversampling ratio for effective noise reduction. |
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 | 2.7–5.25 V supply, 10-bit resolution, SPI-compatible 3-wire interface (CS required), 8 µs conversion, no BUSY pin. | Lacks BUSY status and 12-bit resolution - suitable only where lower accuracy or simpler interface suffices. | Select ADS7822U only if 10-bit resolution meets system requirements and CS-controlled framing is preferred over BUSY-polling. |
| MAX11131AUT+T | 2.7–3.6 V supply only, 12-bit resolution, 1.5 µs conversion, SPI interface with CS, integrated reference, no auto-sleep mode. | Narrower supply range and no power-down mode - limits use in dual-rail or battery-voltage-varying systems. | Choose MAX11131AUT+T for ultra-fast 1.5 µs conversions in fixed 3.3 V systems where lowest latency outweighs power savings. |
Compared with ADS7822U and MAX11131AUT+T, AD7896JRZ-REEL uniquely combines 12-bit accuracy, VDD-referenced operation, BUSY signaling, and auto-sleep power management in an industry-standard SOIC-8 package - making it optimal for portable, battery-sensitive, and space-constrained precision acquisition.
Availability
AD7896JRZ-REEL is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical monitoring equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7896JRZ-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 AD7896JRZ-REEL belongs to Analog Devices' precision data acquisition ADC family, engineered specifically for low-power, high-speed, single-supply embedded measurement systems where board space and energy efficiency are critical constraints.
FAQ
What is the maximum serial clock frequency supported by AD7896JRZ-REEL?
The AD7896JRZ-REEL supports a maximum SCLK frequency of 10 MHz under 5 V operation. At 2.7–3.6 V, the maximum usable frequency is reduced due to longer data access time (t4 = 100 ns). System designers must verify setup/hold timing margins using t4 (data access) and t5 (data hold) specifications to avoid read errors - the AD7896JRZ-REEL does not include internal clock domain crossing logic, so timing compliance is fully system-dependent.
Does AD7896JRZ-REEL require an external voltage reference?
No, AD7896JRZ-REEL does not require an external voltage reference. It uses VDD as its internal reference, enabling a 0 V to VDD unipolar input range. This eliminates external reference components and associated layout complexity, but means analog accuracy tracks VDD stability and ripple - designers must ensure VDD regulation meets system gain error budgets (e.g., ±1% VDD variation contributes directly to full-scale error).
How does the auto-sleep mode function in AD7896JRZ-REEL?
In auto-sleep mode (Mode 2), AD7896JRZ-REEL enters low-power state automatically after conversion completes (BUSY goes low), provided CONVST remains low. The next conversion is initiated by the rising edge of CONVST, which triggers a 6 µs wake-up before the 8 µs conversion begins - totaling 14 µs from rising edge to BUSY low. This reduces average current to ~5 µA at 2.7 V, ideal for infrequent sampling in battery-powered devices.
What is the meaning of the 16-bit serial output format from AD7896JRZ-REEL?
The AD7896JRZ-REEL outputs 16 bits per conversion: four leading zeros followed by the 12-bit straight binary result (MSB first). For example, with VDD = 3.3 V and VIN = 1.65 V, the expected output is 0000 1000 0000 0000 (0x0800). The SDATA line is three-stated after the 16th falling SCLK edge - improper clocking beyond 16 edges corrupts the output register state unless reset by the next CONVST falling edge.
Can AD7896JRZ-REEL operate from a 3.3 V supply while maintaining full 12-bit performance?
Yes, AD7896JRZ-REEL is fully specified for 2.7–5.5 V operation, including 3.3 V. At 3.3 V, it maintains 12-bit resolution, ±1 LSB differential nonlinearity, 70 dB SNR at 10 kHz, and 8 µs conversion time. However, power dissipation drops to ~9 mW typical, and digital input thresholds shift (VINH = 2.0 V min), requiring compatible 3.3 V logic families. The J-version temperature range (0°C to +70°C) remains valid at all supply voltages within spec.
AD7896JRZ-REEL 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):
- 100k
- 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:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7896JRZ-REEL FAQ
1.How can I place an order for AD7896JRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7896JRZ-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 AD7896JRZ-REEL reliable?
The price and inventory of AD7896JRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7896JRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7896JRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7896JRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7896JRZ-REEL?
AD7896JRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7896JRZ-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 AD7896JRZ-REEL?
For technical support, including AD7896JRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7896JRZ-REEL requirements.
6.How does Aetrix verify that AD7896JRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7896JRZ-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 AD7896JRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7896JRZ-REEL?
All AD7896JRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7896JRZ-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 AD7896JRZ-REEL part is unused and in its original packaging.
Return procedure for AD7896JRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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