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Texas Instruments ADS7867IDBVT
- Part No.:
- ADS7867IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS7867IDBVT.pdf
- Description:
- IC ADC 10BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
ADS7867IDBVT from Texas Instruments is a 10-bit, 240-KSPS micro-power SAR analog-to-digital converter with SPI-compatible serial interface, single-supply operation (1.2 V to 3.6 V), ±0.5 LSB integral nonlinearity, and 6-pin SOT-23 package - used for precision signal digitization in battery-powered portable instrumentation.
For engineers reviewing the ADS7867IDBVT datasheet, ADS7867IDBVT pinout, ADS7867IDBVT application, or ADS7867IDBVT equivalent, this page delivers verified technical context, real-world timing behavior, power-performance tradeoffs at 1.2 V/1.6 V/3.6 V, and validated alternative options for low-voltage data acquisition systems.
Technical Context
The ADS7867IDBVT implements a charge-redistribution SAR architecture with integrated sample-and-hold, enabling unipolar 0 V to VDD input range without external reference. Conversion is initiated on CS falling edge, synchronized to SCLK, with no pipeline delay.
It uses 11 SCLK cycles per conversion at 1.6–3.6 V (240 KSPS max) or 1.7 MHz SCLK at 1.2 V (120 KSPS), auto-powering down to 8 nA between conversions. Digital interface complies with SPI Mode 0 (CPOL = 0, CPHA = 0), MSB-first, 3-state SDO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR with no missing codes - ensures monotonicity and deterministic quantization step size across full scale. |
| Throughput Rate | 240 KSPS at VDD ≥ 1.6 V; 120 KSPS at VDD = 1.2 V - defines maximum sampling frequency under specified supply and clock conditions. |
| INL / DNL | ±0.5 LSB integral and differential linearity - guarantees <0.05% full-scale error and absence of code-width anomalies. |
| Supply Range | 1.2 V to 3.6 V single supply - enables direct integration into ultra-low-voltage systems including coin-cell and energy-harvesting designs. |
| Power Consumption | 0.42 mW typical at 240 KSPS, VDD = 1.6 V; 1.51 mW at 3.6 V - supports extended battery life in portable medical and sensor nodes. |
| Auto Power-Down | 8 nA typical quiescent current - eliminates need for external enable control during idle periods. |
| Input Range | 0 V to VDD unipolar, single-ended - simplifies front-end design by eliminating level-shifting or external reference components. |
Pinout & Package
ADS7867IDBVT is housed in a 6-pin SOT-23 (DBV) package with 0.95 mm pitch, surface-mount footprint, and thermal performance characterized for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF/VDD | Power supply and internal reference input | Supplies core logic and ADC reference; sets full-scale analog input range from 0 V to this voltage. |
| GND | Analog and digital ground reference | Common return path for all signals; must be low-impedance to minimize noise coupling into SAR core. |
| VIN | Analog input terminal | Single-ended, unipolar input accepting 0 V to VDD; internally sampled via integrated capacitor network. |
| SCLK | Serial clock input | Controls conversion timing and data shift-out rate; also serves as internal conversion clock source. |
| SDO | Serial data output | 3-state, MSB-first SPI output; transitions on falling SCLK edge after sampling completes; high-impedance post-conversion. |
| CS | Chip select (active-low) | Initiates conversion cycle on falling edge; frames output data; must remain low for entire 11-SCLK conversion sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Micro-power operation | 261 µA typical supply current at 240 KSPS, VDD = 1.6 V - reduces thermal load and extends runtime in space-constrained devices. |
| SPI-compatible interface | Mode 0 (CPOL = 0, CPHA = 0), 3-wire, MSB-first - enables plug-in compatibility with standard microcontroller SPI peripherals. |
| No external reference required | Internal VDD-referenced architecture - eliminates BOM cost and PCB area for precision reference ICs or resistive dividers. |
| Low-voltage support | Guaranteed 120 KSPS operation at 1.2 V - allows direct interfacing with sub-1.8 V logic families and emerging ultra-low-power MCUs. |
| Auto power-down | 8 nA standby current with SCLK active or inactive - removes need for software-controlled shutdown sequences in duty-cycled systems. |
Applications
| Battery-Powered Portable Instrumentation | Isolated Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary ADC digitizing analog sensor outputs (e.g., thermistor, pressure transducer) with minimal power overhead. Use Value: 0.42 mW at 240 KSPS and 1.6 V enables >1-year battery life while maintaining 10-bit resolution and 240 KSPS throughput. |
Use Scenario: Industrial field transmitter with galvanic isolation between sensor front-end and microcontroller. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned analog signals before serial transmission across isolator barrier. Use Value: Single-supply 1.2–3.6 V operation matches isolated DC-DC output rails; SPI interface minimizes isolator channel count. |
| Portable Medical Devices | Automatic Test Equipment (ATE) Front-End |
Use Scenario: Wearable ECG patch acquiring biopotential signals with low-noise analog front-end. IC Role / Device Role / Timing Role: High-fidelity digitizer capturing low-amplitude, low-frequency physiological waveforms. Use Value: ±0.5 LSB INL and 61.8 dB SNR at 30 kHz ensure diagnostic-grade accuracy without calibration overhead. |
Use Scenario: Modular ATE slot card requiring fast, low-power ADC for stimulus-response measurement. IC Role / Device Role / Timing Role: Embedded digitizer sampling DUT output during functional test sequences. Use Value: 240 KSPS throughput and 3.235 µs conversion time support tight test cycle timing; small SOT-23 footprint saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7866IDBVT | 12-bit resolution, 200 KSPS max, ±1.5 LSB INL, same 6-pin SOT-23 package and pinout | Higher resolution but lower speed and higher power at equivalent VDD; requires tighter analog layout due to increased sensitivity | Select when 12-bit precision outweighs 40 KSPS speed loss and added SNR headroom is needed for post-processing. |
| ADS7868IDBVT | 8-bit resolution, 280 KSPS max, ±0.5 LSB INL, identical package and pinout | Higher throughput and lower latency but reduced dynamic range; optimized for high-speed threshold detection over precision digitization | Select when system prioritizes sampling rate and simplicity over resolution - e.g., motor phase monitoring or basic waveform capture. |
Compared with ADS7867IDBVT, ADS7866IDBVT trades speed and power for 2 extra bits of resolution, while ADS7868IDBVT sacrifices 2 bits to gain 40 KSPS throughput - all three share identical pinout, supply range, and interface protocol, enabling flexible resolution-scaling within the same PCB layout.
Availability
ADS7867IDBVT is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, isolated data acquisition systems, portable medical devices, and automatic test equipment requiring stable component supply and long-term industrial temperature support.
Supply support for ADS7867IDBVT 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and low-power design.
The ADS786x family was designed specifically for ultra-low-voltage, micro-power data acquisition in space- and energy-constrained applications - emphasizing single-supply operation, internal reference, and minimal external component count.
FAQ
What is the maximum sampling rate of the ADS7867IDBVT at 1.2 V supply?
The ADS7867IDBVT achieves a maximum throughput rate of 120 KSPS when operated at VDD = 1.2 V with fSCLK = 1.7 MHz. This is specified in the datasheet's ADS7867 section under Sampling Dynamics, and reflects the device's ability to maintain 10-bit performance even at minimum supply voltage.
Does the ADS7867IDBVT require an external reference voltage?
No, the ADS7867IDBVT does not require an external reference. Its internal reference is derived directly from the VDD supply, establishing a unipolar 0 V to VDD input range. This eliminates external reference components and simplifies system design - confirmed in the Theory of Operation and Applications sections of the SLAS465 datasheet.
What is the pinout compatibility between ADS7867IDBVT and ADS7866IDBVT?
The ADS7867IDBVT and ADS7866IDBVT share identical 6-pin SOT-23 (DBV) packaging and pin assignments: REF/VDD, GND, VIN, SCLK, SDO, and CS. This allows direct substitution in existing layouts where resolution flexibility is acceptable - verified in the Pin Configuration and Terminal Functions sections of the datasheet.
How does the ADS7867IDBVT enter and exit power-down mode?
The ADS7867IDBVT automatically enters power-down mode after each conversion completes, drawing only 8 nA typical current. It exits power-down on the next falling edge of CS, initiating a new conversion cycle - no external control signal or register write is required, as documented in the Features and Timing Requirements sections.
What SPI mode does the ADS7867IDBVT support?
The ADS7867IDBVT supports SPI Mode 0 (CPOL = 0, CPHA = 0): SCLK idles low, data is sampled on the rising edge and changed on the falling edge. This is explicitly stated in the datasheet's Digital Interface description and confirmed by the timing diagram showing SDO valid after falling SCLK edges.
ADS7867IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 240k
- 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:
- -
ADS7867IDBVT FAQ
1.How can I place an order for ADS7867IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7867IDBVT 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 ADS7867IDBVT reliable?
The price and inventory of ADS7867IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7867IDBVT is usually 5 days.
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4.How is shipping managed for ADS7867IDBVT?
ADS7867IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7867IDBVT 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 ADS7867IDBVT?
For technical support, including ADS7867IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7867IDBVT requirements.
6.How does Aetrix verify that ADS7867IDBVT is sourced from the original manufacturer or authorized distributors?
All ADS7867IDBVT 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 ADS7867IDBVT meets industry standards.
7.What is the process for return or replacement of ADS7867IDBVT?
All ADS7867IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7867IDBVT, 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 ADS7867IDBVT part is unused and in its original packaging.
Return procedure for ADS7867IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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