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Analog Devices Inc. AD7468BRTZ-REEL7
- Part No.:
- AD7468BRTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7468BRTZ-REEL7.pdf
- Description:
- IC ADC 8BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,541
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Product details
Overview
AD7468BRTZ-REEL7 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 with 0.2 mW power dissipation at 1.8 V/100 kSPS and features internal VDD-referenced conversion, 0 to VDD input range, and SPI/QSPI/MICROWIRE-compatible serial interface - ideal for ultra-low-power sensor digitization in portable medical devices.
For engineers reviewing the AD7468BRTZ-REEL7 datasheet, AD7468BRTZ-REEL7 pinout, AD7468BRTZ-REEL7 application, or AD7468BRTZ-REEL7 equivalent, key selection criteria include its 8-bit resolution, 320 kSPS max throughput, 10 SCLK-cycle conversion time, 8 nA typical power-down current, and SOT-23-6 package compatibility with space-constrained battery-powered systems.
Technical Context
The AD7468BRTZ-REEL7 implements a standard successive approximation register (SAR) architecture with no pipeline delay, using CS to initiate sampling on its falling edge and SCLK to control both conversion timing and serial data output. Its track-and-hold amplifier supports full-power bandwidth up to 3.2 MHz at 2.5–3.6 V supplies.
Conversion is fully synchronous: input acquisition begins at CS fall, conversion completes in exactly 10 SCLK cycles, and 8-bit result (MSB-first, prefixed by four zeros) appears on SDATA aligned to subsequent SCLK falling edges. Reference is derived internally from VDD, eliminating external reference components and enabling rail-to-rail analog input (0 V to VDD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - provides 256 discrete digital codes for basic sensor monitoring and control feedback loops. |
| Throughput Rate | 320 kSPS maximum - enables real-time sampling of audio-band and fast transient signals without oversampling hardware. |
| Supply Voltage Range | 1.6 V to 3.6 V - supports direct integration with single-cell Li-ion, LiFePO₄, or dual-cell alkaline battery rails. |
| Power-Down Current | 8 nA typical - reduces system standby power to negligible levels in intermittent-sampling architectures. |
| INL / DNL | ±0.2 LSB max - ensures monotonicity and predictable linearity across full scale for calibration-free applications. |
| SNR @ 30 kHz | 49 dB minimum - sufficient for 8-bit effective resolution in low-noise signal chains with <10 kHz bandwidth. |
| Acquisition Time | 640 ns maximum (VDD ≥ 1.8 V) - allows rapid settling after power-up or wake-from-sleep, minimizing dead time between conversions. |
Pinout & Package
AD7468BRTZ-REEL7 is housed in a 6-lead SOT-23 package (JEDEC MO-178AA), footprint-compatible with industry-standard pick-and-place equipment and suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low input that initiates sampling on falling edge and frames serial data transfer; enables multi-device SPI bus sharing. |
| VDD | Power Supply | Single 1.6–3.6 V supply powering analog core, digital logic, and internal reference; also defines ADC input range (0 V to VDD). |
| GND | Analog Ground | Common reference for all analog circuitry; must be routed separately from digital ground to preserve SNR performance. |
| VIN | Analog Input | Single-ended input accepting 0 V to VDD full-scale range; 20 pF input capacitance requires low-impedance driving source. |
| SDATA | Serial Data Output | Three-state CMOS output delivering 12-bit (AD7466), 10-bit (AD7467), or 8-bit (AD7468) result MSB-first, prefixed by four zeros. |
| SCLK | Serial Clock | Input clock synchronizing conversion timing and serial data output; supports 10–3.4 MHz range, directly setting throughput rate. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Power/Speed Scaling | Throughput rate scales linearly with SCLK frequency (up to 3.4 MHz); lower clock speeds reduce power proportionally without firmware changes. |
| Zero Pipeline Delay | Conversion completes deterministically in 10 SCLK cycles; eliminates latency uncertainty critical for closed-loop control timing. |
| Internal VDD Reference | Removes need for external reference IC or resistor divider, reducing BOM count and layout area while maintaining ratiometric accuracy. |
| Ultra-Low Power-Down Mode | 8 nA typical quiescent current enables microcontroller-gated operation - e.g., wake-on-interrupt → sample → sleep cycles with sub-μW average power. |
| SPI/QSPI/MICROWIRE Compatibility | Direct interface with common microcontrollers (ARM Cortex-M, MSP430, PIC) without level-shifting or protocol translation logic. |
Applications
| Portable ECG Monitoring | Wireless Sensor Node |
|---|---|
Use Scenario: Continuous 3-lead ECG signal digitization in handheld diagnostic device powered by coin-cell battery. IC Role / Device Role / Timing Role: Primary ADC capturing analog lead voltages at 250 SPS with automatic power-down between samples. Use Value: 8 nA power-down current extends battery life beyond 2 years; 0–VDD input range matches op-amp output swing without level-shifting. |
Use Scenario: Temperature/humidity node transmitting data every 5 seconds via BLE, requiring minimal active time per measurement cycle. IC Role / Device Role / Timing Role: Low-latency digitizer triggered by MCU GPIO, completing 8-bit conversion in ≤3 μs before entering deep sleep. Use Value: 320 kSPS capability allows oversampling + decimation for noise reduction; 640 ns acquisition time enables fast wake-and-capture response. |
| Implantable Drug Pump Feedback | Industrial Battery Gauge |
Use Scenario: Closed-loop pressure sensing in miniaturized implantable infusion pump where size and power are strictly constrained. IC Role / Device Role / Timing Role: High-reliability ADC converting piezoresistive bridge output with guaranteed monotonicity (no missed codes to 8 bits). Use Value: ±0.2 LSB INL/DNL ensures consistent actuator positioning; SOT-23-6 package fits within hermetic ceramic module footprint. |
Use Scenario: Fuel gauge in 2-cell Li-ion power tool pack, measuring cell voltage and current sense resistor drop under load. IC Role / Device Role / Timing Role: Dual-channel monitoring ADC (with external multiplexer) sampling voltage and current at 1 kSPS burst mode. Use Value: 1.6 V minimum supply allows operation down to near-end-of-discharge; 0.2 mW active power prevents self-heating errors in sealed battery pack. |
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, SO-8 package. | Lacks micropower capability (1.25 mW at 200 kSPS); unsuitable for sub-μA sleep systems. | Choose ADS7822U only if higher supply voltage (>3.6 V) or SO-8 assembly infrastructure exists. |
| MCP3002-I/P | 10-bit, 200 kSPS, 2.7–5.5 V supply, SPI interface, DIP-8 package. | Higher resolution but larger package and higher minimum supply; no 1.6 V operation or 8 nA power-down. | Select MCP3002-I/P when 10-bit precision is mandatory and board space/power budget allow larger footprint and higher idle current. |
Compared with ADS7822U and MCP3002-I/P, AD7468BRTZ-REEL7 uniquely combines 8-bit resolution with 1.6 V operation, 320 kSPS speed, and 8 nA power-down - making it the only option for space- and energy-constrained designs requiring fast wake-and-sample behavior.
Availability
AD7468BRTZ-REEL7 is available at Aetrix Electronics and suitable for portable medical instruments, wireless sensor nodes, implantable devices, and industrial battery gauges requiring stable component supply across long production lifecycles.
Supply support for AD7468BRTZ-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, 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, small-footprint data acquisition in battery-operated systems - emphasizing micropower operation, wide supply range, and simplified system integration via internal reference and compact packaging.
FAQ
What is the maximum sampling rate supported by the AD7468BRTZ-REEL7?
The AD7468BRTZ-REEL7 supports a maximum throughput rate of 320 kSPS, achieved when operated with a 3.4 MHz serial clock (SCLK) and VDD ≥ 2.5 V. At lower SCLK frequencies, the throughput scales linearly - for example, 1.7 MHz SCLK yields ~160 kSPS. This deterministic relationship simplifies timing design in microcontroller-based systems.
Does the AD7468BRTZ-REEL7 require an external voltage reference?
No, the AD7468BRTZ-REEL7 uses an internal reference derived from VDD, establishing a 0 V to VDD analog input range. This eliminates the need for external reference components, reduces BOM cost and PCB area, and ensures ratiometric accuracy - meaning output codes scale proportionally with supply voltage variations.
How does the power-down mode function on the AD7468BRTZ-REEL7?
The AD7468BRTZ-REEL7 enters automatic power-down mode after each conversion completes and remains there until the next CS falling edge initiates a new sample. In this state, typical current consumption drops to 8 nA - verified across −40°C to +85°C - enabling multi-year battery life in duty-cycled sensor applications.
What package type is used for the AD7468BRTZ-REEL7?
The AD7468BRTZ-REEL7 is supplied in a 6-lead SOT-23 package (JEDEC MO-178AA), with pinout matching the AD7466/AD7467 variants. This compact surface-mount package measures 2.9 mm × 1.6 mm × 1.15 mm and supports standard reflow soldering profiles, making it suitable for high-density portable electronics.
Is the AD7468BRTZ-REEL7 compatible with standard SPI interfaces?
Yes, the AD7468BRTZ-REEL7 is fully compatible with SPI, QSPI, MICROWIRE, and DSP serial interfaces. It uses a 3-wire interface (CS, SCLK, SDATA) with data output on the falling edge of SCLK, MSB-first format, and no requirement for MOSI - simplifying connection to most microcontrollers without additional glue logic.
AD7468BRTZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 200k
- 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:
- 1.6V ~ 3.6V
- Voltage - Supply, Digital:
- 1.6V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7468BRTZ-REEL7 FAQ
1.How can I place an order for AD7468BRTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7468BRTZ-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 AD7468BRTZ-REEL7 reliable?
The price and inventory of AD7468BRTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7468BRTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7468BRTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7468BRTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7468BRTZ-REEL7?
AD7468BRTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7468BRTZ-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 AD7468BRTZ-REEL7?
For technical support, including AD7468BRTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7468BRTZ-REEL7 requirements.
6.How does Aetrix verify that AD7468BRTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7468BRTZ-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 AD7468BRTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7468BRTZ-REEL7?
All AD7468BRTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7468BRTZ-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 AD7468BRTZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7468BRTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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