My Inquiry
My Account
Analog Devices Inc. AD7896JRZ
- Part No.:
- AD7896JRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7896JRZ.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,520
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7896JRZ from Analog Devices is a single-supply, 12-bit successive-approximation ADC with 8 µs conversion time, integrated track-and-hold amplifier and on-chip clock, operating from 2.7 V to 5.5 V and consuming only 9 mW typical. It delivers 70 dB SNR at 10 kHz input and supports 100 kHz throughput in high-sampling mode for precision data acquisition in portable instrumentation.
For engineers reviewing the AD7896JRZ datasheet, AD7896JRZ pinout, AD7896JRZ application, or AD7896JRZ equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic and DC specifications, real-world application mappings, and two rigorously cross-checked alternative parts - all grounded in Analog Devices' official AD7896 Rev. D documentation.
Technical Context
The AD7896JRZ implements an R-2R ladder-based successive approximation architecture with internal laser-trimmed clock generation and a monolithic track-and-hold amplifier. Its analog input range is 0 V to VDD, using VDD as the reference - eliminating need for external voltage references.
It operates in two distinct modes: Mode 1 (high-sampling) initiates conversion on CONVST falling edge with 8 µs conversion time; Mode 2 (auto-sleep) enters low-power state after conversion completion and wakes up 6 µs before next CONVST rising edge, extending total cycle to 14 µs. Serial interface uses 2-wire protocol (SCLK/SDATA) with 16-bit frame format: four leading zeros + 12-bit straight binary result.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes over full scale; enables 1 LSB = VDD/4096 quantization (e.g., 0.81 mV at 3.3 V). |
| Conversion Time | 8 µs max (Mode 1) - sets minimum inter-conversion interval for 100 kHz throughput when paired with 1.6 µs serial read at 10 MHz SCLK. |
| SNR | 70 dB min @ 10 kHz sine input - ensures usable dynamic range for audio-band and sensor signal digitization. |
| Power Dissipation | 9 mW typical at 2.7–5.5 V - enables battery-powered operation; drops to 13.5 µW in power-down mode (J version, 25°C). |
| Analog Input Range | 0 V to VDD - eliminates level-shifting circuitry; requires driving source impedance ≤1 kΩ for 1.5 µs acquisition to 12-bit accuracy. |
| Serial Interface | 2-wire (SCLK/SDATA), 16-bit frame (4 zero + 12 data bits), 10 MHz max SCLK - compatible with standard microcontroller SPI peripherals using software bit-banging or custom timing. |
| Operating Temperature | 0°C to +70°C (J version) - qualified for commercial-grade embedded systems and test equipment environments. |
Pinout & Package
AD7896JRZ is housed in an 8-lead SOIC package (JEDEC MS-012, 0.150" wide), with gull-wing leads and standard 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Analog input node | Accepts unipolar 0 V to VDD range; high-impedance input (±2 µA max) but requires ≤1 kΩ source impedance for full 12-bit settling in 1.5 µs. |
| VDD (Pin 2) | Positive supply & reference | Single 2.7–5.5 V rail powers analog/digital sections and serves as ADC reference - no external reference needed. |
| AGND (Pin 3) | Analog ground reference | Separate ground return for track-and-hold, comparator, and DAC; must be routed independently from DGND to minimize noise coupling. |
| SCLK (Pin 4) | Serial clock input | External clock synchronizes 16-bit serial read; data valid on falling edge; max frequency 10 MHz (VDD = 5 V). |
| SDATA (Pin 5) | Serial data output | Three-state CMOS output delivering 4-zero-prefixed 12-bit straight binary; disabled after 16th SCLK falling edge. |
| DGND (Pin 6) | Digital ground reference | Ground return for digital logic (CONVST, BUSY, SCLK, SDATA); must connect to AGND at single point near device. |
| CONVST (Pin 7) | Edge-triggered start control | Falling edge initiates conversion and hold mode; low level at end of conversion triggers auto-sleep; rising edge wakes device in Mode 2. |
| BUSY (Pin 8) | Conversion status indicator | Open-drain output pulled high externally; goes high on CONVST falling edge, returns low after conversion completes (8 or 14 µs). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track-and-hold amplifier | Acquires 0–VDD input to ±1/2 LSB in ≤1.5 µs - enables accurate sampling of full-scale sine waves up to 50 kHz without external components. |
| On-chip clock generator | Laser-trimmed oscillator eliminates external crystal/clock source - reduces BOM count and layout complexity in space-constrained designs. |
| Auto power-down mode | Reduces IDD from 4 mA (active) to 5 µA typ (25°C, VDD = 2.7–3.6 V) between conversions - extends battery life in intermittent-sampling applications. |
| Single-supply, reference-free operation | VDD serves as both supply and reference - removes need for precision external reference, trimming resistors, or level-shifters in 0–VDD input systems. |
| High-speed serial interface | 2-wire (SCLK/SDATA), 16-bit frame, 10 MHz max clock - simplifies microcontroller interfacing versus parallel ADCs while maintaining 100 kHz effective throughput. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
|
Use Scenario: Battery-powered environmental monitoring unit acquiring temperature, humidity, and pressure sensor outputs at 10–100 Hz intervals. IC Role / Device Role / Timing Role: ADC front-end converting conditioned analog sensor outputs into digital values; triggered by microcontroller's periodic CONVST pulses. Use Value: 9 mW typical power and auto-sleep mode extend battery life to >1 year; 0–VDD input range matches common 3.3 V sensor output rails without scaling. |
Use Scenario: PLC analog input module digitizing 4–20 mA current loop signals conditioned to 0–5 V range. IC Role / Device Role / Timing Role: Precision 12-bit digitizer with track-and-hold enabling accurate sampling of noisy industrial signals; synchronized via isolated CONVST line. Use Value: ±1 LSB relative accuracy and 70 dB SNR meet Class B industrial measurement requirements; SOIC package supports automated PCB assembly. |
| Medical Instrumentation | Test & Measurement Equipment |
|
Use Scenario: Handheld ECG front-end capturing lead-II differential voltage with baseline drift compensation. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital converter sampling at ≥1 kHz; track-and-hold rejects switching noise from digital subsystems. Use Value: 1.5 µs acquisition time and 70 dB SNR preserve diagnostic waveform integrity; single 3.3 V supply simplifies isolated power design. |
Use Scenario: Benchtop multimeter digitizing DC/AC voltage inputs with autoranging and filtering. IC Role / Device Role / Timing Role: Core ADC in dual-slope or successive-approximation architecture; driven by precise timing controller for calibration and averaging. Use Value: Guaranteed no missing codes and ±1 LSB DNL ensure monotonic response across full scale; J-version temp range covers lab ambient conditions. |
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 |
|---|---|---|---|
| AD7892ARZ-10 | 10-bit resolution, 1.5 µs conversion, 5 V only supply (4.75–5.25 V), no auto-sleep mode, same SOIC-8 package. | Lower resolution and fixed supply limit suitability to cost-sensitive, non-battery applications where speed > precision. | Select AD7892ARZ-10 only if 10-bit accuracy suffices and system already uses regulated 5 V rail; not suitable for 2.7–3.6 V or low-power designs. |
| ADS7822U | 12-bit, 8 µs conversion, 2.7–5.25 V supply, SPI-compatible 3-wire interface (separate CS), no BUSY pin, MSOP-8 package. | Requires chip-select management and lacks BUSY status signaling - increases firmware overhead; smaller footprint but higher thermal resistance. | Choose ADS7822U when board space is critical and microcontroller supports native SPI; avoid if real-time BUSY polling or SOIC-8 compatibility is required. |
Compared with AD7896JRZ, AD7892ARZ-10 trades resolution and flexibility for lower cost and faster conversion, while ADS7822U offers identical resolution in a smaller package but removes hardware handshaking (BUSY) and changes interface protocol - both require PCB redesign and firmware adaptation.
Availability
AD7896JRZ is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance.
Supply support for AD7896JRZ 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, with design centers worldwide.
The AD7896JRZ belongs to Analog Devices' precision SAR ADC product line, engineered for space-constrained, low-power data acquisition systems where integration of reference, track-and-hold, and serial interface in an 8-lead package is critical.
FAQ
What is the maximum sampling rate achievable with AD7896JRZ?
The AD7896JRZ achieves a maximum throughput rate of 100 kHz in Mode 1 (high-sampling), calculated from 8 µs conversion time + 1.6 µs serial read (at 10 MHz SCLK) + 0.4 µs acquisition margin. In Mode 2 (auto-sleep), effective rate depends on wake-up and conversion timing, but sustained 10 kHz operation is typical for ultra-low-power use cases. The AD7896JRZ datasheet confirms this under "CONVERSION RATE" and Figure 2 timing diagrams.
Does AD7896JRZ require an external voltage reference?
No, the AD7896JRZ does not require an external voltage reference. Its analog input range is 0 V to VDD, and VDD serves as the internal reference - a key feature highlighted in the "GENERAL DESCRIPTION" and "PRODUCT HIGHLIGHTS" sections of the AD7896JRZ datasheet. This eliminates external reference components and associated layout sensitivity.
What are the logic voltage levels for AD7896JRZ digital pins?
For AD7896JRZ, VINH is 2.0 V min (VDD = 2.7–3.6 V) or 2.4 V min (VDD = 5 V ±10%), and VINL is 0.8 V max across all supply conditions. Output VOH is ≥2.4 V (ISOURCE = 400 µA), VOL ≤0.4 V (ISINK = 1.6 mA). These values are specified in the "LOGIC INPUTS" and "LOGIC OUTPUTS" tables of the AD7896JRZ Rev. D datasheet.
How does the auto power-down mode work in AD7896JRZ?
In AD7896JRZ Mode 2, the device automatically enters power-down after conversion completes (when BUSY goes low), reducing IDD to 5 µA typ (25°C, VDD = 2.7–3.6 V). It wakes up 6 µs after the rising edge of CONVST, then performs 8 µs conversion. This behavior is explicitly defined in the "OPERATING MODES" section and Figure 3 of the AD7896JRZ datasheet.
Is AD7896JRZ pin-compatible with other AD78xx series ADCs?
No, AD7896JRZ is not pin-compatible with other AD78xx-series parts. Its 8-pin SOIC pinout (VIN, VDD, AGND, SCLK, SDATA, DGND, CONVST, BUSY) is unique to the AD7896 family. For example, AD7892 uses different pin assignments (e.g., no BUSY pin), and AD7895 has a parallel interface. Pin compatibility is neither claimed nor implied in the AD7896JRZ datasheet.
AD7896JRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for AD7896JRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7896JRZ 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 reliable?
The price and inventory of AD7896JRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7896JRZ is usually 5 days.
3.What payment methods are accepted for AD7896JRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7896JRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7896JRZ?
AD7896JRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7896JRZ 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?
For technical support, including AD7896JRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7896JRZ requirements.
6.How does Aetrix verify that AD7896JRZ is sourced from the original manufacturer or authorized distributors?
All AD7896JRZ 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 meets industry standards.
7.What is the process for return or replacement of AD7896JRZ?
All AD7896JRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7896JRZ, 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 part is unused and in its original packaging.
Return procedure for AD7896JRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7896JRZ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
