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Analog Devices Inc. AD7468BRT-R2
- Part No.:
- AD7468BRT-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7468BRT-R2.pdf
- Description:
- IC ADC 8BIT 1.6V LP SOT-23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
AD7468BRT-R2 from Analog Devices is an 8-bit, micropower successive approximation ADC operating from 1.6 V to 3.6 V supply, delivering 320 kSPS throughput with 0.2 mW power dissipation at 1.8 V/100 kSPS and 0.57 mW maximum at 3 V/100 kSPS. It features a 0 V to VDD input range, SPI/QSPI/MICROWIRE-compatible serial interface, and 8 nA typical power-down current - optimized for battery-powered remote data acquisition.
For engineers reviewing the AD7468BRT-R2 datasheet, AD7468BRT-R2 pinout, AD7468BRT-R2 application, or AD7468BRT-R2 equivalent, key selection considerations include its 8-bit resolution, SOT-23-6 package, 320 kSPS max throughput, 0.2–0.57 mW operational power, and guaranteed no missed codes to 8 bits under −40°C to +85°C operation.
Technical Context
The AD7468BRT-R2 implements a standard successive approximation register (SAR) architecture with internal track-and-hold, sampling on the falling edge of CS and initiating conversion simultaneously. Its reference is derived directly from VDD, enabling full-scale analog input range of 0 V to VDD without external reference components.
Conversion timing is fully controlled by the external SCLK: 10 clock cycles define the conversion time (2.94 μs max at 3.4 MHz), and automatic power-down activates after each conversion, reducing average current to 8 nA typical. No pipeline delay is present, ensuring deterministic latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes with guaranteed no missed codes. |
| Throughput Rate | 320 kSPS maximum - supports high-speed sampling in compact low-power systems. |
| Supply Voltage Range | 1.6 V to 3.6 V - enables direct interfacing with single-cell Li-ion, NiMH, or 1.8 V/2.5 V/3.3 V logic domains. |
| Power Dissipation | 0.2 mW typical at 1.8 V/100 kSPS - extends battery life in portable medical or sensor nodes. |
| Power-Down Current | 8 nA typical - reduces quiescent consumption during idle intervals in duty-cycled systems. |
| Analog Input Range | 0 V to VDD - eliminates need for level-shifting or external reference, simplifying signal chain design. |
| INL / DNL | ±0.2 LSB max - ensures monotonicity and predictable linearity across full temperature range. |
Pinout & Package
AD7468BRT-R2 is housed in a 6-lead SOT-23 package (JEDEC MO-178AA), with exposed pad not electrically connected. Pin 1 is CS (chip select), pin 2 is VDD, pin 3 is GND, pin 4 is VIN, pin 5 is SDATA, and pin 6 is SCLK.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Active-low chip select | Initiates conversion and frames serial data transfer; sampled on falling edge. |
| VDD | Power supply input | Provides both analog and digital supply (1.6–3.6 V); also serves as internal reference. |
| GND | Analog ground reference | Common return for analog circuitry and VIN; must be low-impedance and separated from digital ground where possible. |
| VIN | Analog input channel | Single-ended input accepting 0 V to VDD range; 20 pF input capacitance requires careful driver impedance matching. |
| SDATA | Serial data output | 3-state output delivering 4 leading zeros + 8-bit MSB-first result; tri-states after conversion completes. |
| SCLK | Serial clock input | Controls conversion timing and data clocking; 10-cycle cycle defines conversion time (max 3.4 MHz). |
Key Features
| Feature | Design Value |
|---|---|
| Flexible serial clock management | Conversion rate scales linearly with SCLK frequency - allows dynamic trade-off between speed and power. |
| Zero pipeline delay | Deterministic 2.94 μs max latency from CS falling edge to data valid - critical for real-time closed-loop control. |
| Internal VDD-referenced conversion | Eliminates external reference IC and associated BOM cost, layout area, and calibration complexity. |
| Guaranteed no missed codes | Ensures monotonic behavior across full 8-bit range at −40°C to +85°C - essential for position sensing and threshold detection. |
| Ultra-low shutdown current | 8 nA typical power-down current enables multi-year battery life in wake-on-event sensor nodes. |
Applications
| Portable ECG Monitors | Wireless Sensor Nodes |
|---|---|
Use Scenario: Continuous analog front-end digitization of low-amplitude biopotential signals (0.5–5 mV) in handheld or wearable ECG units powered by coin-cell or single Li-ion batteries. IC Role / Device Role / Timing Role: Primary 8-bit SAR ADC acquiring lead-II differential voltage at 250–500 Hz with minimal power overhead and no external reference. Use Value: 0.2 mW typical power at 1.8 V enables >3-year battery life in sleep-wake cycles; 0–VDD input range accommodates rail-to-rail amplifier outputs without level shifters. | Use Scenario: Environmental parameter acquisition (temperature, humidity, light) in battery-operated IoT endpoints transmitting data over BLE or LoRaWAN every 5–60 seconds. IC Role / Device Role / Timing Role: Low-latency, low-power analog-to-digital converter interfacing with resistive or capacitive sensors via simple RC filters. Use Value: 8 nA power-down current minimizes standby drain; SPI compatibility enables direct connection to ultra-low-power MCUs like Nordic nRF52 or Silicon Labs EFM32 without level translators. |
| Isolated Industrial Sensors | Remote Battery-Powered Data Loggers |
Use Scenario: Digitizing 4–20 mA loop signals or thermocouple outputs in hazardous-area transmitters using galvanic isolation and energy harvesting. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned analog signals before transmission across digital isolators (e.g., ADuM140x). Use Value: Single-supply 1.6–3.6 V operation matches isolated DC-DC output rails; 320 kSPS headroom supports oversampling for noise reduction in noisy industrial environments. | Use Scenario: Long-term environmental monitoring in unattended field deployments (e.g., soil moisture, water quality) powered by solar-charged LiFePO₄ cells. IC Role / Device Role / Timing Role: Primary data acquisition component triggered periodically by RTC interrupt to sample analog sensors with precise timing control. Use Value: Deterministic 2.94 μs conversion time and no pipeline delay enable accurate timestamp alignment; 0.57 mW max power at 3 V ensures stable operation across full battery discharge curve. |
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 |
|---|---|---|---|
| ADS7822UID | 8-bit, 200 kSPS, 2.7–5.25 V supply, SPI interface, 1.25 mW at 3 V/100 kSPS | Higher supply voltage floor (2.7 V) limits single-cell compatibility; higher power prevents ultra-low-energy use cases | Select when system already uses 3.3 V rail and requires TI's production support ecosystem |
| MAX11100EXK+T | 8-bit, 300 kSPS, 2.7–3.6 V supply, SPI interface, 0.45 mW at 3 V/100 kSPS, internal reference | Narrower supply range excludes 1.6–2.6 V operation; slightly lower throughput and higher min VDD restrict low-voltage flexibility | Select when internal reference stability is prioritized over lowest possible quiescent current |
Compared with ADS7822UID and MAX11100EXK+T, AD7468BRT-R2 uniquely supports 1.6 V operation and delivers the lowest power-down current (8 nA), making it optimal for energy-constrained, wide-input-voltage applications where supply headroom is minimal.
Availability
AD7468BRT-R2 is available at Aetrix Electronics and suitable for battery-powered systems, remote data acquisition, isolated industrial sensors, and portable medical instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7468BRT-R2 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 AD746x family was designed specifically for ultra-low-power, space-constrained data acquisition in battery-operated and isolated systems - emphasizing micropower operation, single-supply simplicity, and robust performance from −40°C to +85°C.
FAQ
What is the maximum sampling rate supported by the AD7468BRT-R2?
The AD7468BRT-R2 supports a maximum throughput rate of 320 kSPS, achieved with a 3.4 MHz SCLK and 10 serial clock cycles per conversion. This value is specified across the full −40°C to +85°C temperature range and 1.6 V to 3.6 V supply voltage, with no pipeline delay affecting timing predictability.
Does the AD7468BRT-R2 require an external voltage reference?
No, the AD7468BRT-R2 uses an internal reference derived from VDD, establishing a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference components, reducing BOM count, PCB area, and calibration complexity while maintaining monotonicity and guaranteed no-missed-codes performance.
What package type is used for the AD7468BRT-R2?
The AD7468BRT-R2 is supplied in a 6-lead SOT-23 package (JEDEC MO-178AA), designated by the "BRT" suffix in the part number. It features a standard footprint compatible with automated assembly and reflow processes, with pin 1 marked by a dot and pinout matching Figure 4 in the AD7466/AD7467/AD7468 Rev. C datasheet.
How does power consumption scale with supply voltage and throughput in the AD7468BRT-R2?
AD7468BRT-R2 power consumption decreases linearly with lower supply voltage and sampling rate: at 100 kSPS, it draws 0.2 mW typical at 1.8 V, 0.4 mW max at 2.5 V, and 0.57 mW max at 3 V. In power-down mode, current drops to 8 nA typical regardless of VDD, enabling aggressive duty cycling in energy-harvesting or battery-limited designs.
Is the AD7468BRT-R2 compatible with standard SPI interfaces?
Yes, the AD7468BRT-R2 features an SPI/QSPI/MICROWIRE/DSP-compatible serial interface. It uses a 3-wire configuration (CS, SCLK, SDATA) with data output on the falling edge of SCLK, MSB-first format, and 4 leading zero bits preceding the 8-bit result - requiring no mode configuration or initialization sequence for basic readout.
AD7468BRT-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Cut Tape (CT)
- 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:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7468BRT-R2 FAQ
1.How can I place an order for AD7468BRT-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7468BRT-R2 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 AD7468BRT-R2 reliable?
The price and inventory of AD7468BRT-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7468BRT-R2 is usually 5 days.
3.What payment methods are accepted for AD7468BRT-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7468BRT-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7468BRT-R2?
AD7468BRT-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7468BRT-R2 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 AD7468BRT-R2?
For technical support, including AD7468BRT-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7468BRT-R2 requirements.
6.How does Aetrix verify that AD7468BRT-R2 is sourced from the original manufacturer or authorized distributors?
All AD7468BRT-R2 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 AD7468BRT-R2 meets industry standards.
7.What is the process for return or replacement of AD7468BRT-R2?
All AD7468BRT-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7468BRT-R2, 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 AD7468BRT-R2 part is unused and in its original packaging.
Return procedure for AD7468BRT-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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