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Analog Devices Inc. AD7912ARMZ-REEL
- Part No.:
- AD7912ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7912ARMZ-REEL.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,402
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Product details
Overview
AD7912ARMZ-REEL from Analog Devices is a 10-bit, 2-channel, successive approximation ADC with 1 MSPS throughput, operating from a single 2.35 V to 5.25 V supply. It features dual single-ended analog inputs (VIN0/VIN1), SPI-compatible serial interface, and no pipeline delay-enabling precise timing-critical sampling in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the AD7912ARMZ-REEL datasheet, AD7912ARMZ-REEL pinout, AD7912ARMZ-REEL application, or AD7912ARMZ-REEL equivalent, this page delivers verified specifications including 10-bit resolution, 61 dB SINAD at 100 kHz, ±0.5 LSB INL, 290 ns acquisition time, and TSOT-8 package compatibility-critical for low-power, space-constrained embedded designs.
Technical Context
The AD7912ARMZ-REEL implements a true successive approximation register (SAR) architecture with integrated track-and-hold, supporting input frequencies up to 8.5 MHz (−3 dB) and full-power bandwidth of 1.5 MHz (−0.1 dB). Conversion is initiated by the falling edge of CS, with sampling synchronized to CS and clocked by SCLK at up to 18 MHz.
It uses internal VDD-referenced conversion, eliminating external reference components, and supports daisy-chain mode for multi-ADC systems. Channel selection is performed via DIN pin during CS assertion, and output data includes channel ID and mode bits before the 10-bit result (MSB-first, two trailing zeros).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - guarantees monotonic transfer function with no missing codes across full temperature range. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to ~400 kHz (Nyquist-limited) without aliasing in baseband applications. |
| SINAD @ 100 kHz | 61 dB minimum - defines usable dynamic range for medium-fidelity sensor signal digitization (e.g., medical biosensors, industrial transducers). |
| INL / DNL | ±0.5 LSB max each - ensures high linearity for precision measurement where code-edge accuracy impacts calibration stability. |
| Acquisition Time | 290 ns maximum - determines minimum inter-conversion interval when multiplexing between VIN0 and VIN1 channels. |
| Power @ 1 MSPS | 4.8 mW typ at 3 V - enables continuous high-speed sampling in energy-sensitive applications like handheld meters and PDA peripherals. |
| Standby Current | 1 µA maximum - allows rapid wake-up from ultra-low-power sleep states without external reset or reinitialization overhead. |
Pinout & Package
AD7912ARMZ-REEL is housed in an 8-lead TSOT package (3.0 mm × 3.0 mm × 0.8 mm), optimized for compact PCB layouts and thermal efficiency in portable systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DOUT (Pin 4) | Serial data output | Three-state logic output delivering 12-bit frame (2 leading zeros + CHN bit + MOD bit + 10-bit result + 2 trailing zeros) on SCLK falling edges. |
| CS (Pin 3) | Chip select / conversion trigger | Active-low signal that initiates sampling on its falling edge and frames serial data transfer; controls normal/power-down modes. |
| SCLK (Pin 2) | Serial clock input | Master clock for both data I/O and internal conversion timing; supports up to 18 MHz for 1 MSPS operation (14-cycle conversion). |
| DIN (Pin 1) | Data input / channel select | Accepts channel selection bit on SCLK falling edge during CS assertion-determines whether VIN0 or VIN1 is converted next. |
| VIN0 (Pin 7), VIN1 (Pin 8) | Analog input channels | Single-ended, 0–VDD input range; internally multiplexed into shared track-and-hold amplifier with 20 pF input capacitance. |
| GND (Pin 6) | Analog ground reference | Primary return path for analog circuitry; must be isolated from digital ground to maintain 61 dB SINAD performance. |
| VDD (Pin 5) | Power supply | Single 2.35–5.25 V rail powering analog core, digital interface, and internal reference-no external reference required. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture provides deterministic, one-shot conversion with zero latency between sample initiation and result availability-critical for closed-loop control feedback. |
| Daisy-chain capability | Enables synchronous readout of multiple AD7912ARMZ-REEL devices using a single SCLK/CS pair-reduces GPIO count and simplifies firmware for multi-sensor nodes. |
| Flexible power management | Full power-down mode draws ≤1 µA; average current scales linearly with throughput-supports adaptive sampling strategies in energy-harvesting systems. |
| Wide supply range | Operates from 2.35 V to 5.25 V without performance degradation-allows direct integration with Li-ion, coin-cell, or regulated 3.3 V/5 V rails without level-shifting. |
| Channel-to-channel isolation | 90 dB typical crosstalk suppression-ensures accurate simultaneous monitoring of independent analog sources (e.g., voltage + current sensing in power supplies). |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG, pulse oximetry, or glucose sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel SAR ADC performing synchronized sampling of biopotential and reference signals with sub-microsecond timing control. Use Value: 10-bit resolution and 61 dB SINAD support clinical-grade signal fidelity; 4.8 mW power at 3 V extends battery life beyond 72 hours in active monitoring mode. |
Use Scenario: Long-term environmental monitoring (temperature, humidity, light) in remote field deployments powered by AA batteries or solar harvesters. IC Role / Device Role / Timing Role: Low-power analog front-end digitizing multiple sensor outputs with programmable sampling intervals and automatic power-down between conversions. Use Value: 1 µA standby current minimizes quiescent drain; daisy-chain mode allows expansion to 4+ sensors without additional SPI chip selects or routing complexity. |
| Industrial Sensor Interface Modules | Optical Sensor Signal Conditioning |
Use Scenario: Compact PLC I/O modules converting analog 4–20 mA or 0–10 V process signals in factory automation equipment. IC Role / Device Role / Timing Role: Precision 2-channel ADC interfacing with op-amp signal conditioning stages and microcontroller via SPI, handling mixed-voltage sensor inputs. Use Value: ±0.5 LSB INL ensures <0.1% measurement error over temperature; 0–VDD input range accommodates 3.3 V or 5 V system rails without external attenuators. |
Use Scenario: High-speed photodiode or CCD readout in portable spectrometers or laser alignment tools requiring >100 kSPS sampling. IC Role / Device Role / Timing Role: Fast-acquisition ADC capturing transient optical pulses with 290 ns track-and-hold settling-preserving rise-time integrity of fast photodetector outputs. Use Value: 8.5 MHz full-power bandwidth supports clean digitization of >100 ns optical pulses; 71 dB SNR enables detection of weak signals above quantization noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7922ARMZ-REEL | 12-bit resolution, 70 dB SINAD min, higher power (15.5 mW at 5 V), same pinout and interface. | Required when >10-bit precision needed for high-dynamic-range sensors (e.g., strain gauges, precision thermistors). | Select AD7922ARMZ-REEL only if system SNR budget demands ≥70 dB and layout allows marginally higher thermal dissipation. |
| ADS7822U | 12-bit, 200 kSPS max, SPI-compatible, 8-pin SOIC package, 2.7–5.25 V supply, no daisy-chain mode. | Suitable for lower-throughput, cost-sensitive industrial controls where 1 MSPS is unnecessary. | Choose ADS7822U for legacy SOIC footprints or when firmware cannot support daisy-chain protocol overhead. |
Compared with AD7922ARMZ-REEL and ADS7822U, the AD7912ARMZ-REEL uniquely balances 1 MSPS speed, 10-bit precision, and ultra-low 1 µA standby current in a 3×3 mm TSOT package-making it optimal for size- and energy-constrained applications where 12-bit resolution is not mandatory.
Availability
AD7912ARMZ-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for AD7912ARMZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7912ARMZ-REEL belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, high-throughput data acquisition in space-constrained portable and embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7912ARMZ-REEL?
The AD7912ARMZ-REEL supports a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.35 V to 5.25 V, fSCLK = 18 MHz). This requires 14 SCLK cycles per conversion, limiting minimum conversion period to 777 ns. At lower clock speeds, throughput scales linearly-for example, 500 kSPS at 9 MHz SCLK-while maintaining full DC and AC specifications.
Does the AD7912ARMZ-REEL require an external voltage reference?
No, the AD7912ARMZ-REEL uses an internal reference derived from VDD, enabling operation with a single supply rail from 2.35 V to 5.25 V. This eliminates external reference components and associated layout complexity, while providing a full-scale input range of 0 V to VDD. Reference rejection ratio is specified at 60 dB, ensuring robustness against supply ripple.
How does the daisy-chain mode work on the AD7912ARMZ-REEL?
In daisy-chain mode, multiple AD7912ARMZ-REEL devices share a common SCLK and CS line, with DOUT of one device connected to DIN of the next. During a single CS assertion, all devices perform conversions simultaneously, and results are shifted out sequentially via the chain's final DOUT pin. This reduces microcontroller pin count and simplifies synchronization in multi-channel systems.
What is the analog input voltage range for the AD7912ARMZ-REEL?
The AD7912ARMZ-REEL accepts single-ended analog inputs from 0 V to VDD across both VIN0 and VIN1 pins. Input leakage current is limited to ±0.3 µA, and input capacitance is 20 pF typical. The device tolerates overvoltage up to VDD + 0.3 V per Absolute Maximum Ratings, but sustained operation outside 0–VDD may degrade INL or cause latch-up.
Can the AD7912ARMZ-REEL operate from a 2.5 V supply?
Yes, the AD7912ARMZ-REEL is fully specified for operation from 2.35 V to 5.25 V. At 2.5 V, it maintains 1 MSPS throughput, 61 dB SINAD at 100 kHz, and ±0.5 LSB INL. Power consumption drops to ~2 mW typical, and logic thresholds adapt automatically (VINH = 0.7 × VDD, VINL = 0.2 × VDD), ensuring reliable SPI communication without level shifters.
AD7912ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7912ARMZ-REEL FAQ
1.How can I place an order for AD7912ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7912ARMZ-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 AD7912ARMZ-REEL reliable?
The price and inventory of AD7912ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7912ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7912ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7912ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7912ARMZ-REEL?
AD7912ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7912ARMZ-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 AD7912ARMZ-REEL?
For technical support, including AD7912ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7912ARMZ-REEL requirements.
6.How does Aetrix verify that AD7912ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7912ARMZ-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 AD7912ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7912ARMZ-REEL?
All AD7912ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7912ARMZ-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 AD7912ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD7912ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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