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Texas Instruments ADS7952SBDBT
- Part No.:
- ADS7952SBDBT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7952SBDBT.pdf
- Description:
- IC ADC 12BIT SAR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,687
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Product details
Overview
ADS7952SBDBT from Texas Instruments is a 12-bit, 12-channel, single-ended SAR analog-to-digital converter with 1-MSPS sampling rate, zero-latency operation, and programmable per-channel alarm thresholds. It features a 20-MHz SPI-compatible serial interface, dual input ranges (0 to VREF and 0 to 2×VREF), and four GPIOs in its 30-pin TSSOP package - used in PLC analog input modules for real-time sensor monitoring.
For engineers reviewing the ADS7952SBDBT datasheet, ADS7952SBDBT pinout, ADS7952SBDBT application, or ADS7952SBDBT equivalent, key selection considerations include channel count (12), resolution (12-bit), sample rate (1 MSPS), GPIO configurability, and TSSOP-30 package compatibility with industrial signal acquisition systems.
Technical Context
The ADS7952SBDBT implements a capacitor-based SAR architecture with integrated sample-and-hold, accepting analog supply voltages from 2.7 V to 5.25 V and I/O supply from 1.7 V to 5.25 V. Its falling-edge CS-triggered sampling and SCLK-synchronized conversion enable deterministic timing in closed-loop control systems.
It supports both auto-sequencing across preselected channels and manual channel selection per conversion cycle. Two software-selectable unipolar input ranges (0–VREF and 0–2×VREF) and two independently programmable alarm levels per channel provide flexible signal conditioning without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step for high-precision sensor digitization |
| Sample Rate | 1 MSPS - enables capture of signals up to ~400 kHz (Nyquist-limited) in high-speed data acquisition |
| Analog Supply Range | 2.7 V to 5.25 V - supports direct connection to common industrial rails including 3.3 V and 5 V systems |
| I/O Supply Range | 1.7 V to 5.25 V - allows glueless interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V microcontrollers and FPGAs |
| Input Bandwidth | 47 MHz at 3 dB - preserves fidelity of fast transients and wideband sensor outputs before sampling |
| Power Dissipation | 14.5 mW at 1 MSPS (+VA = 5 V, +VBD = 3 V) - suitable for thermally constrained industrial modules |
| Power-Down Current | 1 µA - reduces system standby power in battery-backed or energy-sensitive applications |
Pinout & Package
The ADS7952SBDBT is housed in a 30-pin TSSOP (DBT) package measuring 7.80 mm × 4.40 mm, with exposed thermal pad for enhanced heat dissipation in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH11 | Analog input | Twelve single-ended analog input channels routed to internal multiplexer; CH0–CH3 assigned to pins 20, 18, 14, 12 respectively |
| AINP / AINM | Differential analog input pair | High-impedance buffered inputs supporting pseudo-differential mode; AINP = pin 8, AINM = pin 9 |
| MXO | Analog output | Multiplexer output - provides buffered analog sum or selected channel output (pin 7) |
| REFP / REFM | Analog reference | Reference voltage inputs (pins 4, 3); support external 2.5 V reference (e.g., REF5025) with ±0.1 V tolerance |
| CS / SCLK / SDI / SDO | Digital interface | SPI-compatible 4-wire serial interface (active-low CS, pin 23; SCLK, pin 24; SDI, pin 25; SDO, pin 26) |
| GPIO0–GPIO3 | Configurable I/O | Four bidirectional digital pins (pins 29, 30, 1, 2); support alarm outputs (GPIO0 = alarm, GPIO1 = low-alarm), range select (GPIO2), and power-down (GPIO3) |
| +VA / AGND | Analog power | Analog supply (pins 5, 29) and ground (pins 6, 10, 19, 20, 30) - require local decoupling for noise immunity |
| +VBD / BDGND | Digital I/O power | Separate digital supply (pin 28) and ground (pin 27) - isolates digital switching noise from analog section |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay - critical for real-time feedback in servo drives and power supply regulation |
| Per-channel programmable alarms | Two independent threshold registers per channel (high/low) enable autonomous over-range detection without host intervention |
| Auto-sequencing mode | Hardware-controlled channel cycling across up to 12 inputs - reduces CPU overhead in multi-sensor monitoring |
| Input range selection | Software-configurable 0–VREF or 0–2×VREF scaling - optimizes dynamic range for varying sensor output spans |
| Low-power power-down mode | 1 µA quiescent current during idle periods - extends operational life in portable or isolated measurement nodes |
Applications
| PLC Analog Input Module | Optical Line Card Monitoring |
|---|---|
Use Scenario: Digitizing 12 temperature, pressure, and current loop signals in a modular industrial controller cabinet. IC Role / Device Role / Timing Role: Primary ADC managing simultaneous sampling and alarm generation for field I/O expansion slots. Use Value: 12-channel integration eliminates need for multiple 4-channel ADCs; GPIO-driven alarms reduce polling load on main controller. |
Use Scenario: Real-time monitoring of laser bias current, TEC voltage, and photodiode outputs in telecom DWDM line cards. IC Role / Device Role / Timing Role: High-fidelity front-end digitizer with sub-microsecond latency for closed-loop optical power stabilization. Use Value: 47 MHz input bandwidth preserves fast transient response of photodiode signals; zero-latency mode ensures immediate fault detection. |
| Medical Patient Monitor | Digital Power Supply Feedback |
Use Scenario: Acquiring ECG, respiration, and SpO₂ analog waveforms in portable bedside monitors with strict power budgets. IC Role / Device Role / Timing Role: Multi-channel signal conditioner feeding FPGA-based digital signal processing pipeline. Use Value: 14.5 mW active power and 1 µA power-down current meet battery-operated device runtime requirements. |
Use Scenario: Sampling output voltage, inductor current, and temperature in digitally controlled AC/DC and DC/DC converters. IC Role / Device Role / Timing Role: Precision feedback path component enabling adaptive compensation and fault protection algorithms. Use Value: Programmable per-channel alarms trigger immediate shutdown on overvoltage/overcurrent events without MCU involvement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953SBDBT | 16-channel variant in same 30-pin TSSOP footprint; identical timing, resolution, and feature set | Used where higher channel density is required without PCB redesign | Select when expanding from 12 to 16 analog inputs while retaining layout and firmware compatibility |
| ADS8684IPWR | 16-bit, 4-channel SAR ADC with integrated PGA and reference; wider supply range (4.75–5.25 V); no GPIOs | Preferred for higher-resolution, lower-channel-count applications requiring built-in gain calibration | Choose when absolute accuracy >12-bit and programmable gain are mandatory, accepting reduced channel count and no alarm GPIOs |
Compared with ADS7953SBDBT, the ADS7952SBDBT offers optimized channel count for mid-density I/O; versus ADS8684IPWR, it trades resolution and PGA for greater channel count, GPIO flexibility, and lower power - making it ideal for scalable, alarm-driven industrial monitoring.
Availability
ADS7952SBDBT is available at Aetrix Electronics and suitable for PLC/IPC systems, optical line card monitoring, and medical instrumentation requiring stable component supply, long-term manufacturability, and TI-qualified industrial-grade performance.
Supply support for ADS7952SBDBT 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial interface solutions.
The ADS79xx product line was designed specifically for high-channel-count, medium-speed industrial data acquisition - balancing resolution, speed, GPIO flexibility, and low-power operation in harsh environments.
FAQ
What is the maximum sampling rate supported by the ADS7952SBDBT?
The ADS7952SBDBT supports a maximum sampling rate of 1 million samples per second (1 MSPS). This rate is achievable across all 12 channels in auto-sequencing mode or any single channel in manual mode, provided the serial clock (SCLK) operates at up to 20 MHz and the chip-select (CS) pulse width meets timing specification tCSH ≥ 20 ns. The ADS7952SBDBT maintains full 12-bit accuracy at this rate under recommended operating conditions.
Does the ADS7952SBDBT require an external reference voltage?
Yes, the ADS7952SBDBT requires an external reference voltage applied to the REFP and REFM pins. It supports a nominal 2.5 V reference (e.g., REF5025) with ±0.1 V tolerance, though the device operates correctly with VREF between 1.0 V and 5.25 V. The reference directly sets full-scale input range - 0 to VREF or 0 to 2×VREF depending on GPIO2 configuration - and impacts absolute accuracy and noise performance.
How many GPIOs does the ADS7952SBDBT provide, and what functions do they support?
The ADS7952SBDBT provides four general-purpose I/O pins (GPIO0–GPIO3) in its 30-pin TSSOP package. GPIO0 serves as a programmable high-alarm output, GPIO1 as low-alarm output, GPIO2 selects input range (0 → 0–VREF, 1 → 0–2×VREF), and GPIO3 acts as active-low power-down control. All four pins are software-configurable via internal registers and retain state during power-down mode.
Is the ADS7952SBDBT pin-compatible with other devices in the ADS79xx family?
Yes, the ADS7952SBDBT is pin-compatible with ADS7950–ADS7953 and ADS7956–ADS7961 in the same 30-pin TSSOP (DBT) package. This includes identical pin assignments for power, interface, analog inputs, and GPIOs. Channel count varies across variants (4/8/12/16), but PCB layout and firmware interface remain unchanged when upgrading within the DBT footprint group.
What are the supported input configurations for the ADS7952SBDBT?
The ADS7952SBDBT supports single-ended analog inputs on CH0–CH11, plus a differential pair (AINP/AINM) usable as a dedicated channel or for pseudo-differential measurements. It does not support true fully differential input mode. Input signals must be unipolar (0 V to VREF or 0 V to 2×VREF), and the internal high-impedance PGA is bypassed by default - external amplification (e.g., THS4031) is recommended for high-source-impedance sensors.
ADS7952SBDBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 12
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 1.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 38-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7952SBDBT FAQ
1.How can I place an order for ADS7952SBDBT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7952SBDBT 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 ADS7952SBDBT reliable?
The price and inventory of ADS7952SBDBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7952SBDBT is usually 5 days.
3.What payment methods are accepted for ADS7952SBDBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7952SBDBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7952SBDBT?
ADS7952SBDBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7952SBDBT 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 ADS7952SBDBT?
For technical support, including ADS7952SBDBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7952SBDBT requirements.
6.How does Aetrix verify that ADS7952SBDBT is sourced from the original manufacturer or authorized distributors?
All ADS7952SBDBT 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 ADS7952SBDBT meets industry standards.
7.What is the process for return or replacement of ADS7952SBDBT?
All ADS7952SBDBT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7952SBDBT, 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 ADS7952SBDBT part is unused and in its original packaging.
Return procedure for ADS7952SBDBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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