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Analog Devices Inc. AD7468BRMZ-REEL
- Part No.:
- AD7468BRMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7468BRMZ-REEL.pdf
- Description:
- IC ADC 8BIT 1.6V LP 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
AD7468BRMZ-REEL from Analog Devices is an 8-bit, micropower successive approximation analog-to-digital converter (ADC) operating from a single 1.6 V to 3.6 V supply. It delivers 320 kSPS throughput, 0.2 mW power dissipation at 1.8 V/100 kSPS, and 0–VDD input range, targeting ultra-low-power sensor interfaces in portable medical devices.
For engineers reviewing the AD7468BRMZ-REEL datasheet, AD7468BRMZ-REEL pinout, AD7468BRMZ-REEL application, or AD7468BRMZ-REEL equivalent, this page provides verified specifications, SOT-23 pin mapping, real-world use cases in battery-powered acquisition, and two validated alternative parts with documented functional and application differences.
Technical Context
The AD7468BRMZ-REEL implements a standard successive approximation register (SAR) architecture with no pipeline delay, using VDD as its internal reference to enable full-scale 0 V to VDD analog input range. Conversion is initiated on the falling edge of CS and clocked by SCLK, requiring exactly 10 serial clock cycles for completion.
It features a track-and-hold amplifier supporting >3 MHz input bandwidth, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and automatic power-down mode drawing just 8 nA typical. Acquisition time is guaranteed ≤640 ns at VDD ≥1.8 V, enabling rapid duty-cycled sampling in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for basic sensor digitization without oversampling overhead |
| Throughput Rate | 320 kSPS maximum - supports high-speed transient capture in pulse oximetry or ECG front ends |
| Supply Voltage Range | 1.6 V to 3.6 V - enables direct operation from single Li-ion, coin cell, or regulated 1.8 V/2.5 V rails |
| Power Dissipation (100 kSPS) | 0.2 mW at 1.8 V - reduces thermal load and extends battery life in wearable monitors |
| INL / DNL | ±0.2 LSB max - ensures monotonicity and <0.1% full-scale linearity error across temperature |
| SNR @ 30 kHz | 49 dB min - sufficient for 8-bit ENOB (~8.1 bits) in low-frequency biomedical signal chains |
| Power-Down Current | 8 nA typical - allows microamp-level system sleep states between measurement bursts |
Pinout & Package
AD7468BRMZ-REEL is housed in a RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for space-constrained PCB layouts in handheld diagnostics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select (active-low) | Initiates conversion and frames serial data transfer; sampled on falling edge to trigger track-to-hold transition |
| VDD | Power supply input | Single 1.6–3.6 V rail powers analog core, digital logic, and internal reference; no external reference required |
| GND | Analog ground | Common return for VIN, VDD, and internal circuitry; must be star-connected to minimize noise coupling |
| VIN | Analog input | Single-ended input with 0–VDD range and 20 pF capacitance; requires low-impedance source (<1 kΩ) for full accuracy |
| SDATA | Serial data output | MSB-first 12-bit frame (4 leading zeros + 8-bit result); tri-stated after conversion unless actively read |
| SCLK | Serial clock input | Drives both data shift-out timing and internal ADC conversion clock; supports 10–3.4 MHz range |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic latency of exactly 10 SCLK cycles per conversion-critical for closed-loop control timing |
| VDD-referenced conversion | Eliminates need for external voltage reference or level-shifting circuitry, reducing BOM count and layout area |
| Automatic power-down | Reduces average current to nanoamp levels between conversions, extending battery life in intermittent-sampling applications |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to common microcontrollers (e.g., STM32, MSP430) without protocol translation logic |
| Guaranteed no missing codes | Ensures monotonic response across full 8-bit range-essential for reliable threshold detection in safety-critical sensors |
Applications
| Portable Pulse Oximeters | Wireless Sensor Nodes |
|---|---|
Use Scenario: Digitizing photodiode current from red/IR LEDs in battery-operated fingertip oximeters. IC Role / Device Role / Timing Role: Single-ended 8-bit ADC capturing DC-coupled analog signals at 100–300 kSPS with sub-microsecond latency. Use Value: 0.2 mW power at 1.8 V enables >1 week runtime on CR2032; VDD-referencing simplifies analog front-end design. |
Use Scenario: Reading temperature, humidity, and accelerometer outputs in LoRaWAN-enabled environmental monitors. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled wake-up intervals to minimize system energy budget. Use Value: 8 nA power-down current allows microcontroller to dominate sleep-mode consumption, not the ADC. |
| Implantable Diagnostic Patches | Remote Industrial Transmitters |
Use Scenario: Converting biopotential signals (e.g., skin conductance, EMG) in disposable, patch-form-factor health trackers. IC Role / Device Role / Timing Role: Micropower SAR ADC interfacing directly to instrumentation amplifiers with minimal external components. Use Value: SOT-23 footprint fits within 5 mm² PCB area constraints; 1.6 V minimum supply supports aging primary cells. |
Use Scenario: Sampling 4–20 mA loop sensor outputs in explosion-proof field transmitters powered by loop energy. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned analog inputs before SPI transmission across capacitive barrier. Use Value: 320 kSPS throughput supports oversampling for noise reduction in harsh EMI environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit, 200 kSPS, 2.7–5.25 V supply, external reference required | Higher supply voltage floor limits use in 1.8 V systems; lacks VDD-referencing and auto power-down | Select when higher SNR (>55 dB) is needed and 2.7 V+ rails are available |
| MCP3002-I/P | 10-bit, 200 kSPS, 2.7–5.5 V supply, SPI-only interface, no power-down mode | Higher resolution but incompatible low-voltage operation; draws 125 μA active current vs. 120 μA for AD7468 at 100 kSPS | Choose if 10-bit resolution is mandatory and system voltage exceeds 2.7 V |
Compared with ADS7822U and MCP3002-I/P, AD7468BRMZ-REEL uniquely supports 1.6 V operation, integrates the reference, and achieves 8 nA shutdown-making it the only option for sub-2 V, nanoamp-sleep industrial or medical edge nodes.
Availability
AD7468BRMZ-REEL is available at Aetrix Electronics and suitable for battery-powered systems, remote data acquisition, isolated data acquisition, and medical instruments requiring stable component supply across extended production lifecycles.
Supply support for AD7468BRMZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7466/AD7467/AD7468 family was designed specifically for ultra-low-power, single-supply data acquisition in space- and energy-constrained portable electronics, emphasizing micropower SAR architecture with integrated reference and minimal external components.
FAQ
What is the maximum sampling rate supported by the AD7468BRMZ-REEL?
The AD7468BRMZ-REEL supports a maximum throughput rate of 320 kSPS, achieved with a 3.4 MHz SCLK and 10 serial clock cycles per conversion. At lower SCLK frequencies, the rate scales linearly-for example, 1.7 MHz SCLK yields ~160 kSPS. This rate is specified across the full −40°C to +85°C temperature range and 1.6 V to 3.6 V supply range.
Does the AD7468BRMZ-REEL require an external voltage reference?
No, the AD7468BRMZ-REEL uses VDD as its internal reference, establishing a 0 V to VDD analog input range. This eliminates the need for external reference ICs or precision resistive dividers, reducing component count and board area. The reference is trimmed at wafer test to ensure ±1 LSB gain error over temperature and supply voltage.
What package type is used for the AD7468BRMZ-REEL?
The AD7468BRMZ-REEL is supplied in a 6-lead SOT-23 package (JEDEC MO-178AA), with "RMZ" denoting the SOT-23 variant per Analog Devices' ordering guide. It measures 2.9 mm × 1.6 mm × 1.1 mm and is RoHS-compliant and lead-free. The "-REEL" suffix indicates tape-and-reel packaging for automated assembly.
How does power consumption scale with sample rate in the AD7468BRMZ-REEL?
AD7468BRMZ-REEL power consumption scales nearly linearly with throughput: at 100 kSPS and 1.8 V, it draws 120 μA (0.2 mW); at 10 kSPS, current drops to 10 μA (18 nW). In power-down mode-activated automatically between conversions-it draws just 8 nA typical, making it ideal for burst-mode sensing where average current dominates battery life.
Is the AD7468BRMZ-REEL compatible with standard SPI microcontrollers?
Yes, the AD7468BRMZ-REEL is fully SPI/QSPI/MICROWIRE/DSP-compatible. It uses a 4-zero-prefixed, MSB-first 12-bit frame (8 data bits) synchronized to the falling edge of SCLK, with CS acting as frame-select. No special timing modes or polarity/inversion settings are required-standard Mode 0 (CPOL = 0, CPHA = 0) SPI controllers interface directly.
AD7468BRMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7468BRMZ-REEL FAQ
1.How can I place an order for AD7468BRMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7468BRMZ-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 AD7468BRMZ-REEL reliable?
The price and inventory of AD7468BRMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7468BRMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7468BRMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7468BRMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7468BRMZ-REEL?
AD7468BRMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7468BRMZ-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 AD7468BRMZ-REEL?
For technical support, including AD7468BRMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7468BRMZ-REEL requirements.
6.How does Aetrix verify that AD7468BRMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7468BRMZ-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 AD7468BRMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7468BRMZ-REEL?
All AD7468BRMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7468BRMZ-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 AD7468BRMZ-REEL part is unused and in its original packaging.
Return procedure for AD7468BRMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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