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Analog Devices Inc. AD7468BRMZ-REEL7
- Part No.:
- AD7468BRMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7468BRMZ-REEL7.pdf
- Description:
- IC ADC 8BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
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Product details
Overview
AD7468BRMZ-REEL7 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 750 kHz full-power bandwidth at 0.1 dB. It features SPI/QSPI/MICROWIRE/DSP-compatible serial interface, internal VDD-referenced conversion, and 8 nA typical power-down current. It targets low-voltage, battery-powered sensor digitization in portable medical and remote monitoring systems.
For engineers reviewing the AD7468BRMZ-REEL7 datasheet, AD7468BRMZ-REEL7 pinout, AD7468BRMZ-REEL7 application, or AD7468BRMZ-REEL7 equivalent, key selection criteria include its 8-bit resolution with ±0.2 LSB INL, 10-cycle conversion time (2.94 μs max), SOT-23-6 package compatibility, and guaranteed no-missed-codes performance across −40°C to +85°C.
Technical Context
The AD7468BRMZ-REEL7 implements a single-ended, track-and-hold-based successive approximation architecture with no pipeline delay. Conversion is initiated on the falling edge of CS and clocked by SCLK, requiring exactly 10 SCLK cycles for full 8-bit result output (four leading zeros + eight data bits, MSB first).
Its reference is derived directly from VDD, enabling 0 V to VDD analog input range and eliminating external reference components. Power management is fully integrated: automatic power-down occurs after conversion completion, reducing IDD to 0.1 μA max (8 nA typical) without external control signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes with guaranteed no missed codes |
| Throughput Rate | 320 kSPS maximum - supports high-speed sampling in compact embedded systems |
| Supply Voltage Range | 1.6 V to 3.6 V - enables direct operation from single-cell Li-ion or alkaline batteries |
| Power Dissipation (100 kSPS) | 0.2 mW at 1.8 V - reduces thermal load and extends battery life in always-on sensing nodes |
| INL / DNL | ±0.2 LSB max - ensures monotonicity and predictable linearity for control-loop feedback |
| Full-Power Bandwidth | 750 kHz @ 0.1 dB (2.5–3.6 V) - supports accurate digitization of fast transients up to ~100 kHz |
| Power-Down Current | 8 nA typical - allows ultra-low-quiescent operation between acquisition intervals |
Pinout & Package
AD7468BRMZ-REEL7 is packaged in a RoHS-compliant 6-lead SOT-23 (RMZ) package with 0.95 mm pitch and exposed pad for thermal enhancement. Pin 1 is marked via laser scribe; device orientation follows JEDEC MO-178 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low input initiating conversion and framing serial data transfer; sampled on falling edge |
| VDD | Power Supply | Single 1.6–3.6 V supply powering analog core, reference, and digital interface |
| GND | Analog Ground | Common reference for all analog circuitry; must be connected to system AGND plane |
| VIN | Analog Input | Single-ended input with 0 V to VDD range; 20 pF input capacitance requires low-impedance drive |
| SDATA | Serial Data Output | Three-state CMOS output delivering 12-bit frame (4 zeros + 8 data bits, MSB first) |
| SCLK | Serial Clock | Input clocking both data readout and internal conversion timing; 10–3.4 MHz operational range |
Key Features
| Feature | Design Value |
|---|---|
| Flexible supply voltage | Operates from 1.6 V to 3.6 V - eliminates need for LDO regulation in energy-constrained designs |
| No pipeline delay | Deterministic 10-cycle latency - enables precise timing-critical sampling in closed-loop control |
| VDD-referenced conversion | Internal reference tied to VDD - removes external reference IC and associated BOM cost and layout area |
| Automatic power-down | Enters 8 nA sleep state post-conversion - simplifies firmware power management and cuts average current |
| SPI/QSPI/MICROWIRE compatibility | Standard 3-wire serial interface - interoperable with most microcontrollers without custom driver development |
Applications
| Portable ECG Monitoring | Wireless Sensor Node ADC |
|---|---|
Use Scenario: Digitizing low-amplitude bio-potential signals (0.5–5 mV) from dry-electrode ECG front-ends in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary 8-bit ADC capturing lead-II differential outputs at 250 Hz–1 kHz with minimal power overhead. Use Value: 0.2 mW consumption at 1.8 V enables >1-week battery life on CR2032; 8 nA power-down extends idle duration between measurements. |
Use Scenario: Sampling temperature, humidity, and ambient light in battery-powered LoRaWAN end-nodes deployed for agricultural IoT. IC Role / Device Role / Timing Role: Low-voltage analog front-end digitizer interfacing with MCU ADC input multiplexer or standalone sensing path. Use Value: 1.6 V minimum supply allows direct connection to aging primary cells; 320 kSPS headroom supports oversampling for noise reduction. |
| Isolated Industrial Transducer | Low-Cost Medical Pulse Oximetry |
Use Scenario: Digitizing 4–20 mA loop outputs or thermocouple signals in isolated field transmitters using capacitive or magnetic isolation. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned analog signals before serial transmission across barrier. Use Value: No external reference requirement simplifies isolated supply design; 750 kHz bandwidth accommodates anti-alias filtering with passive RC networks. |
Use Scenario: Converting red/IR photodiode currents in compact wearable pulse oximeters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Dual-channel (time-multiplexed) ADC supporting synchronous LED drive and signal capture. Use Value: Guaranteed no-missed-codes ensures reliable saturation detection during perfusion events; 0.2 LSB DNL minimizes SpO₂ calculation error. |
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 | 12-bit resolution, 200 kSPS, 2.7–5.25 V supply, SPI-only interface | Higher precision required; incompatible with sub-2 V battery operation | Select when >8-bit resolution and higher SNR (70 dB) are mandatory, and 3.3 V rail is available |
| MCP3001-I/P | 10-bit resolution, 200 kSPS, 2.7–5.5 V supply, no power-down mode | Lacks micropower capability; unsuitable for intermittent-sampling battery systems | Choose for cost-sensitive industrial controls where 3.3 V supply is stable and continuous operation is acceptable |
Compared with ADS7822UID and MCP3001-I/P, AD7468BRMZ-REEL7 uniquely balances ultra-low voltage operation (1.6 V), sub-μA power-down, and 320 kSPS speed-making it optimal for space- and energy-constrained portable diagnostics where 8-bit fidelity suffices.
Availability
AD7468BRMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, remote data acquisition, and isolated data acquisition requiring stable component supply and long-term manufacturability.
Supply support for AD7468BRMZ-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 micropower, single-supply, high-throughput data acquisition in space-constrained, battery-operated instrumentation and sensing applications.
FAQ
What is the maximum sampling rate supported by the AD7468BRMZ-REEL7?
The AD7468BRMZ-REEL7 supports a maximum throughput rate of 320 kSPS, achieved with a 3.4 MHz SCLK and 10-cycle conversion timing. At lower SCLK frequencies (e.g., 2 MHz), throughput scales linearly down to 100 kSPS while maintaining full 8-bit accuracy and guaranteed no-missed-codes performance across the −40°C to +85°C range.
Does the AD7468BRMZ-REEL7 require an external voltage reference?
No, the AD7468BRMZ-REEL7 uses an internal reference derived from VDD, enabling 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-particularly valuable in compact, low-cost portable systems.
How does the power-down mode function on the AD7468BRMZ-REEL7?
The AD7468BRMZ-REEL7 enters automatic power-down mode immediately after conversion completion and SDATA tri-state assertion, drawing only 8 nA typical current. No additional control signal is required-the mode is inherent to the serial interface protocol and remains active until the next CS assertion initiates a new conversion cycle.
What package type is used for the AD7468BRMZ-REEL7?
The AD7468BRMZ-REEL7 is supplied in a 6-lead SOT-23 package designated RMZ, with JEDEC MO-178 outline dimensions (2.9 mm × 1.6 mm × 1.1 mm). It features a non-standard pin 1 marking (laser scribe) and is RoHS-compliant and halogen-free.
Is the AD7468BRMZ-REEL7 compatible with standard SPI interfaces?
Yes, the AD7468BRMZ-REEL7 is fully compatible with SPI, QSPI, MICROWIRE, and DSP serial protocols. It uses a 3-wire interface (CS, SCLK, SDATA) with data output on the falling edge of SCLK, MSB-first format, and no dummy cycles-requiring only standard GPIO or hardware SPI peripheral configuration on host microcontrollers.
AD7468BRMZ-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:
- 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:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7468BRMZ-REEL7 FAQ
1.How can I place an order for AD7468BRMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7468BRMZ-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 AD7468BRMZ-REEL7 reliable?
The price and inventory of AD7468BRMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7468BRMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7468BRMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7468BRMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7468BRMZ-REEL7?
AD7468BRMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7468BRMZ-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 AD7468BRMZ-REEL7?
For technical support, including AD7468BRMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7468BRMZ-REEL7 requirements.
6.How does Aetrix verify that AD7468BRMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7468BRMZ-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 AD7468BRMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7468BRMZ-REEL7?
All AD7468BRMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7468BRMZ-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 AD7468BRMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7468BRMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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