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Texas Instruments ADS7866IDBVRG4
- Part No.:
- ADS7866IDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS7866IDBVRG4.pdf
- Description:
- IC ADC 12BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,315
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Product details
Overview
ADS7866IDBVRG4 from Texas Instruments is a 12-bit, 200-KSPS micro-power SAR analog-to-digital converter with SPI-compatible serial interface, single-ended unipolar input (0 V to VDD), ±1.5 LSB INL, and 71 dB SNR at 30 kHz - used in ultra-low-power battery-operated sensor front-ends and portable medical instrumentation.
For engineers reviewing the ADS7866IDBVRG4 datasheet, ADS7866IDBVRG4 pinout, ADS7866IDBVRG4 application, or ADS7866IDBVRG4 equivalent, key selection criteria include 1.2–3.6 V supply operation, auto power-down (8 nA typ), 6-pin SOT-23 package constraints, and synchronous conversion timing controlled by SCLK falling edges.
Technical Context
The ADS7866IDBVRG4 implements a charge-redistribution SAR architecture with integrated sample-and-hold, eliminating external hold capacitors. Conversion is initiated on the falling edge of CS, and data is clocked out MSB-first via SDO synchronized to SCLK - requiring exactly 13 SCLK cycles per 12-bit result.
It uses an internal reference derived from VDD, enabling a rail-to-rail unipolar input range (0 V to VDD) without external reference components. The device automatically enters power-down mode after each conversion, reducing IDD to 8 nA typical when idle - critical for duty-cycled sensing systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision sensor interfaces. |
| Throughput Rate | 200 KSPS at VDD ≥ 1.6 V - supports real-time sampling of audio-band and control-loop signals without pipeline latency. |
| INL | ±1.5 LSB - ensures monotonicity and <1 LSB integral error across full temperature range (–40°C to +85°C). |
| SNR | 71 dB at fIN = 30 kHz, VDD ≥ 1.6 V - enables >11.5 effective bits for low-noise measurement applications. |
| Supply Voltage | 1.2 V to 3.6 V - allows direct interfacing with single-cell Li-ion, NiMH, or energy-harvesting power sources. |
| Power-Down Current | 8 nA typical - reduces average system power in intermittent-sampling architectures (e.g., wireless sensor nodes). |
| Package | SOT-23-6 - provides compact 2.9 mm × 1.6 mm footprint compatible with high-density PCB layouts. |
Pinout & Package
ADS7866IDBVRG4 is housed in a 6-pin SOT-23 package (DBV) with exposed pad not electrically connected. Pin 1 is REF/VDD (power and reference), Pin 2 is GND, Pin 3 is VIN (analog input), Pin 4 is SCLK (serial clock input), Pin 5 is SDO (serial data output, tri-state), and Pin 6 is CS (active-low chip select).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF/VDD (Pin 1) | Power supply and internal reference source | Supplies core logic and defines full-scale analog input range (0 V to VDD); no external reference required. |
| GND (Pin 2) | Analog and digital ground reference | Single ground connection for both analog input path and digital interface - requires low-impedance layout to minimize noise coupling. |
| VIN (Pin 3) | Analog input terminal | Accepts single-ended unipolar signals from 0 V to VDD; input capacitance is 12 pF, requiring careful driver impedance matching. |
| SCLK (Pin 4) | Serial clock input | Controls conversion timing and data shift-out rate; minimum cycle time is 6.7 µs at VDD ≥ 2.5 V (max 3.4 MHz). |
| SDO (Pin 5) | Serial data output | Tri-state output delivering 12-bit straight-binary result MSB-first; goes high-impedance after final bit to prevent bus contention. |
| CS (Pin 6) | Active-low chip select | Initiates conversion on falling edge; must remain low for entire 13-SCLK cycle; setup time is 55 ns (VDD ≥ 1.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| SPI-compatible serial interface | Eliminates need for parallel bus routing; supports daisy-chaining and multi-drop configurations with standard MCU SPI peripherals. |
| No pipeline delays | Delivers deterministic conversion latency (3.82 µs typ) - essential for closed-loop control and time-critical event capture. |
| Auto power-down mode | Reduces quiescent current to 8 nA between conversions - extends battery life in wake-on-event sensor systems. |
| Internal VDD-based reference | Removes external reference IC and associated passive components, lowering BOM cost and board area in space-constrained designs. |
| 12-bit no-missing-code performance | Guarantees monotonic transfer function across full operating range - critical for position encoders and safety-critical feedback loops. |
Applications
| Battery-Powered Portable Instrumentation | Isolated Data Acquisition Front-End |
|---|---|
Use Scenario: Handheld blood glucose meters and portable ECG monitors powered by coin-cell or single Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC digitizing analog biosensor outputs with minimal power overhead and rail-to-rail input tracking. Use Value: 0.22 mW power at 100 KSPS and 1.2 V enables >1-year battery life in intermittent-measurement mode. | Use Scenario: Industrial current/voltage sensing modules using optocoupler or transformer isolation between field-side analog and host MCU. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned sensor signals before serial transmission across barrier. Use Value: SPI interface simplifies isolated digital signaling; 1.2 V min supply supports low-voltage isolated DC/DC converters. |
| Medical Point-of-Care Diagnostics | Automatic Test Equipment (ATE) Channel Digitizer |
Use Scenario: Compact ultrasound probe front-ends and portable spirometers requiring low-noise, low-drift analog acquisition. IC Role / Device Role / Timing Role: High-fidelity signal digitizer capturing transducer outputs with 71 dB SNR and ±1.5 LSB INL. Use Value: No missing codes and monotonic response ensure accurate waveform reconstruction for diagnostic interpretation. | Use Scenario: Modular ATE systems where multiple channels digitize DUT outputs under tight timing synchronization. IC Role / Device Role / Timing Role: Channel ADC triggered synchronously via shared CS/SCLK lines for phase-aligned sampling across channels. Use Value: SCLK-controlled conversion start enables precise inter-channel timing alignment without external trigger distribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7866IDBVR | Same die, identical specs, RoHS-compliant packaging (no lead finish specification in G4 suffix) | No functional difference; G4 denotes legacy TI green-lead plating (SnPb), while DBVR is lead-free | Select ADS7866IDBVR for RoHS-compliant production; ADS7866IDBVRG4 only where SnPb finish is explicitly required. |
| ADS7886IDBVR | 12-bit, 1-MSPS, 2.35–5.25 V supply - higher speed but incompatible voltage range and no 1.2 V operation | Requires ≥2.35 V supply; unsuitable for sub-1.6 V battery systems but better for industrial 3.3/5 V rails | Choose ADS7886IDBVR only when throughput >200 KSPS and supply ≥2.35 V are guaranteed; not drop-in for ADS7866IDBVRG4. |
Compared with ADS7866IDBVRG4, ADS7866IDBVR offers identical electrical performance with modern lead-free termination, while ADS7886IDBVR trades ultra-low-voltage capability for higher speed and SNR - making it suitable only in non-battery-limited 3.3/5 V systems.
Availability
ADS7866IDBVRG4 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and isolated data acquisition requiring stable component supply and long-term lifecycle support.
Supply support for ADS7866IDBVRG4 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power signal chain solutions.
The ADS7866IDBVRG4 belongs to TI's micro-power SAR ADC family designed for ultra-low-voltage, battery-constrained applications - emphasizing single-supply operation, internal reference integration, and minimal active/idle power.
FAQ
What is the minimum supply voltage required for ADS7866IDBVRG4 to achieve full 200-KSPS throughput?
The ADS7866IDBVRG4 requires VDD ≥ 1.6 V to operate at its maximum 200-KSPS throughput. At 1.2 V ≤ VDD < 1.6 V, throughput is reduced to 100 KSPS. This voltage-dependent speed scaling is inherent to the SAR architecture's internal switching and settling behavior - confirmed in the SLAS465 datasheet timing tables.
Does ADS7866IDBVRG4 require an external reference voltage?
No, ADS7866IDBVRG4 does not require an external reference. It uses an internal reference derived from VDD, resulting in a unipolar input range of 0 V to VDD. This eliminates external reference components and simplifies design - verified in the "DESCRIPTION" and "ANALOG INPUT" sections of the datasheet.
How many clock cycles are needed to complete one conversion on ADS7866IDBVRG4?
ADS7866IDBVRG4 requires exactly 13 SCLK cycles per conversion - 12 for data bits plus 1 for the initial sampling edge. This is fixed for the 12-bit resolution and confirmed in the timing diagram (Figure 1) and "TIMING REQUIREMENTS" table of SLAS465.
What is the power consumption of ADS7866IDBVRG4 at 1.6 V and 200 KSPS?
At VDD = 1.6 V and 200 KSPS, ADS7866IDBVRG4 draws 241 µA typical supply current, equating to 0.39 mW typical power dissipation. These values are specified in the "POWER DISSIPATION" section of the SLAS465 datasheet under "Normal operation" conditions.
Is ADS7866IDBVRG4 pin-compatible with ADS7867IDBVRG4 or ADS7868IDBVRG4?
Yes, ADS7866IDBVRG4 is pin-compatible with ADS7867IDBVRG4 and ADS7868IDBVRG4 - all share identical SOT-23-6 (DBV) pinout and terminal functions. However, resolution (12/10/8-bit), throughput, and dynamic performance differ; substitution requires firmware and timing validation.
ADS7866IDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- 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:
- External
- Voltage - Supply, Analog:
- 1.2V ~ 3.6V
- Voltage - Supply, Digital:
- 1.2V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7866IDBVRG4 FAQ
1.How can I place an order for ADS7866IDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7866IDBVRG4 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 ADS7866IDBVRG4 reliable?
The price and inventory of ADS7866IDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7866IDBVRG4 is usually 5 days.
3.What payment methods are accepted for ADS7866IDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7866IDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7866IDBVRG4?
ADS7866IDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7866IDBVRG4 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 ADS7866IDBVRG4?
For technical support, including ADS7866IDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7866IDBVRG4 requirements.
6.How does Aetrix verify that ADS7866IDBVRG4 is sourced from the original manufacturer or authorized distributors?
All ADS7866IDBVRG4 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 ADS7866IDBVRG4 meets industry standards.
7.What is the process for return or replacement of ADS7866IDBVRG4?
All ADS7866IDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7866IDBVRG4, 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 ADS7866IDBVRG4 part is unused and in its original packaging.
Return procedure for ADS7866IDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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