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Analog Devices Inc. AD7912ARMZ-REEL7
- Part No.:
- AD7912ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7912ARMZ-REEL7.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,984
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Product details
Overview
AD7912ARMZ-REEL7 from Analog Devices is a 10-bit, 2-channel, successive approximation analog-to-digital converter (ADC) operating from a single 2.35 V to 5.25 V supply with 1 MSPS throughput, 71 dB minimum SNR at 100 kHz input, and channel-to-channel isolation of 90 dB typ - used in portable medical instruments and battery-powered data acquisition systems.
For engineers reviewing the AD7912ARMZ-REEL7 datasheet, AD7912ARMZ-REEL7 pinout, AD7912ARMZ-REEL7 application, or AD7912ARMZ-REEL7 equivalent, key selection criteria include its 10-bit resolution, dual single-ended inputs (VIN0/VIN1), SPI/QSPI/MICROWIRE-compatible serial interface, no pipeline delay, and 8-lead TSOT package for space-constrained embedded sensing nodes.
Technical Context
The AD7912ARMZ-REEL7 implements a track-and-hold amplifier with 290 ns max acquisition time and 8.5 MHz full-power bandwidth, enabling accurate sampling of signals up to 100 kHz with 61 dB min SINAD and −71 dB max THD. Its conversion is initiated on the falling edge of CS, with timing fully controlled by the external SCLK signal (up to 18 MHz).
It uses internal VDD-referenced conversion, eliminating need for external reference, and supports daisy-chain mode for multi-ADC systems. The device features flexible power management: 4.8 mW typ at 1 MSPS with 3 V supplies, and standby current ≤1 µA - critical for ultra-low-power wake-up sampling in portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - guarantees monotonic transfer function with no missing codes across full range. |
| Throughput Rate | 1 MSPS maximum - enables real-time capture of fast transients in sensor monitoring applications. |
| Supply Voltage Range | 2.35 V to 5.25 V - supports direct interfacing with Li-ion, 3.3 V, and 5 V logic domains without level-shifting. |
| SNR @ 100 kHz | 71 dB minimum - ensures high-fidelity digitization of low-amplitude physiological or acoustic signals. |
| Channel Isolation | 90 dB typical - prevents crosstalk between VIN0 and VIN1 in dual-sensor configurations (e.g., differential pressure + temperature). |
| Power Dissipation @ 1 MSPS | 6 mW maximum at 3 V - enables continuous high-speed sampling in energy-harvested or coin-cell-powered devices. |
| Aperture Jitter | 30 ps typical - minimizes sampling uncertainty for high-frequency input reconstruction. |
Pinout & Package
AD7912ARMZ-REEL7 is housed in an 8-lead TSOT (Thin Small Outline Transistor) package, measuring 3.0 mm × 1.7 mm × 0.8 mm, optimized for compact PCB layouts in handheld diagnostics and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DOUT (Pin 4) | Serial data output | Provides 12-bit frame (2 leading zeros + CHN bit + MOD bit + 10-bit result + 2 trailing zeros) MSB-first on SCLK falling edge; enables daisy-chain readout. |
| CS (Pin 3) | Chip select | Active-low signal that initiates conversion and frames serial data; falling edge triggers sampling and conversion start. |
| SCLK (Pin 2) | Serial clock | Controls both data transfer timing and internal ADC conversion clock; supports up to 18 MHz for 1 MSPS operation. |
| DIN (Pin 1) | Data input | Accepts channel selection (VIN0/VIN1) and mode control bits on SCLK falling edge; enables dynamic input switching per conversion. |
| VIN0 (Pin 7), VIN1 (Pin 8) | Analog inputs | Single-ended, 0 to VDD input range; multiplexed into shared track-and-hold amplifier with 20 pF input capacitance. |
| GND (Pin 6) | Analog ground | Reference node for all analog circuitry; must be separated from digital ground to preserve 61 dB SINAD performance. |
| VDD (Pin 5) | Power supply | Single supply powering analog core, reference, and digital interface; also serves as internal reference source. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture delivers deterministic latency: conversion completes in exactly 14 SCLK cycles (777 ns max at 18 MHz), enabling precise time-critical triggering. |
| Flexible serial interface | Fully compatible with SPI, QSPI, MICROWIRE, and DSP host controllers - eliminates need for protocol translation logic in microcontroller-based designs. |
| Daisy-chain capability | Allows cascading multiple AD7912ARMZ-REEL7 units on one serial bus; reduces GPIO count and simplifies synchronization in multi-channel sensor arrays. |
| Low-power standby mode | 1 µA max shutdown current enables rapid wake-up (<1 µs power-up time) for event-driven sampling, extending battery life in intermittent-monitoring applications. |
| VDD-referenced conversion | Eliminates external voltage reference component and associated layout complexity while maintaining 0.5 LSB max gain error match between channels. |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Real-time ECG waveform capture in handheld patient monitors with dual-lead analog front-end. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing lead I and lead II voltages simultaneously at 1 MSPS with synchronized sampling and <1 µs inter-channel skew. Use Value: 90 dB channel isolation prevents cross-talk between leads; 71 dB SNR preserves diagnostic fidelity of microvolt-level cardiac signals. |
Use Scenario: Environmental sensor hub logging temperature, humidity, and gas concentration from discrete analog sensors. IC Role / Device Role / Timing Role: Centralized 10-bit digitizer acquiring from two independent sensor outputs with programmable channel sequencing via DIN. Use Value: 4.8 mW power at 3 V enables >1-year operation on AA batteries; daisy-chain support scales to 4+ sensors without additional SPI peripherals. |
| Optical Sensor Interface | Industrial Control Loop Monitoring |
Use Scenario: High-speed photodiode signal conditioning in optical smoke detectors requiring fast transient detection. IC Role / Device Role / Timing Role: Digitizing fast-rising photocurrent pulses with 8.5 MHz full-power bandwidth and 30 ps aperture jitter. Use Value: 100 kHz input bandwidth and 61 dB SINAD ensure accurate pulse amplitude measurement for reliable alarm thresholding. |
Use Scenario: Analog feedback monitoring in motor drive inverters, capturing DC-link voltage and phase current simultaneously. IC Role / Device Role / Timing Role: Dual-input ADC sampling two critical control loop variables with matched gain/offset (±0.3 LSB max match) for closed-loop stability. Use Value: Gain error match ≤0.3 LSB and offset error match ≤0.3 LSB minimize calibration overhead and improve current/voltage ratio accuracy. |
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-REEL7 | 12-bit resolution, 70 dB min SINAD, higher power (20 mW max at 5 V), same pinout and interface. | Required where higher dynamic range is needed (e.g., precision vibration analysis), not suitable for strict 10-bit cost/power targets. | Select AD7922ARMZ-REEL7 only when 12-bit resolution and ≥70 dB SINAD are mandatory; AD7912ARMZ-REEL7 remains optimal for 10-bit, lower-power use cases. |
| ADS7822U | 12-bit, 200 kSPS max, SPI-only interface, 8-pin SOIC package, no daisy-chain mode. | Limited to slower sampling; lacks channel isolation spec and low-power standby (10 µA min), unsuitable for 1 MSPS portable systems. | ADS7822U may serve legacy designs with SOIC footprints and sub-200 kSPS requirements but cannot replace AD7912ARMZ-REEL7 in high-throughput, low-power, or daisy-chain architectures. |
Compared with AD7922ARMZ-REEL7 and ADS7822U, AD7912ARMZ-REEL7 uniquely balances 1 MSPS speed, 10-bit precision, 1 µA standby, and daisy-chain capability in a 3×1.7 mm TSOT package - making it the only option meeting simultaneous constraints of size, power, speed, and multi-device scalability in next-gen portable instrumentation.
Availability
AD7912ARMZ-REEL7 is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data acquisition, optical sensor interfaces, and industrial control loop monitoring requiring stable component supply and long-term production continuity.
Supply support for AD7912ARMZ-REEL7 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-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, high-speed, multi-channel data acquisition in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7912ARMZ-REEL7?
The AD7912ARMZ-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with an SCLK frequency of up to 18 MHz and 14 SCLK cycles per conversion. This rate is guaranteed across the full operating temperature range (−40°C to +85°C) and supply voltage range (2.35 V to 5.25 V). At lower SCLK frequencies, the throughput scales linearly - for example, 5 MHz SCLK yields ~315 kSPS. The AD7912ARMZ-REEL7 maintains full 10-bit accuracy and specified SNR/THD performance at all supported rates.
Does the AD7912ARMZ-REEL7 require an external voltage reference?
No, the AD7912ARMZ-REEL7 uses an internal reference derived from the VDD supply, eliminating the need for an external reference component. This design simplifies layout, reduces BOM count, and maintains a 0 to VDD analog input range. The internal reference contributes to the specified ±0.5 LSB max gain error and ±0.3 LSB max gain error match between channels. No external reference pins are present on the AD7912ARMZ-REEL7, and connecting an external reference is neither supported nor required.
How does the daisy-chain mode work on the AD7912ARMZ-REEL7?
In daisy-chain mode, multiple AD7912ARMZ-REEL7 devices share a single SCLK and CS line, with DOUT of one device connected to DIN of the next. A single 12-bit frame (for AD7912ARMZ-REEL7) is clocked out per device, allowing sequential readout of all conversions in one serial transaction. The mode is enabled by asserting CS and applying sufficient SCLK cycles (14 per device); channel and mode bits remain valid per device. This reduces microcontroller SPI peripheral usage and ensures synchronized sampling across the chain when CS is asserted simultaneously.
What is the analog input structure of the AD7912ARMZ-REEL7?
The AD7912ARMZ-REEL7 features two single-ended analog inputs (VIN0 and VIN1), multiplexed into a shared track-and-hold amplifier. Input voltage range is 0 V to VDD, with ±0.3 µA max DC leakage and 20 pF typical input capacitance. Channel selection is performed dynamically via the DIN pin before each conversion. The device specifies 90 dB typical channel-to-channel isolation, ensuring minimal crosstalk when sampling different signal sources - critical for applications like dual-sensor monitoring or differential measurements using external amplification.
What power-saving modes does the AD7912ARMZ-REEL7 support?
The AD7912ARMZ-REEL7 supports a full power-down mode with ≤1 µA maximum standby current (typically 50 nA), activated by holding CS high while SCLK is inactive. Power-up time from this state is ≤1 µs. During active conversion, average power is minimized via SCLK-gated operation: IDD drops to 1.5 mA typ (2.35–3.6 V) or 3 mA typ (4.75–5.25 V) in static normal mode, and scales with throughput. At 1 MSPS, power dissipation is 6 mW max at 3 V - significantly lower than competing 10-bit ADCs with similar speed, enabling extended runtime in battery-powered AD7912ARMZ-REEL7 deployments.
AD7912ARMZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD7912ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7912ARMZ-REEL7 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-REEL7 reliable?
The price and inventory of AD7912ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7912ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7912ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7912ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7912ARMZ-REEL7?
AD7912ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7912ARMZ-REEL7 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-REEL7?
For technical support, including AD7912ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7912ARMZ-REEL7 requirements.
6.How does Aetrix verify that AD7912ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7912ARMZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7912ARMZ-REEL7?
All AD7912ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7912ARMZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD7912ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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