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Texas Instruments ADS7952SBDBTR
- Part No.:
- ADS7952SBDBTR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7952SBDBTR.pdf
- Description:
- IC ADC 12BIT SAR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
ADS7952SBDBTR from Texas Instruments is a 12-bit, 12-channel, single-ended SAR analog-to-digital converter with 1-MSPS sample 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 configurable GPIOs in its 30-pin TSSOP package. It is used in industrial PLC signal monitoring where multi-channel precision timing and real-time alarm triggering are required.
For engineers reviewing the ADS7952SBDBTR datasheet, ADS7952SBDBTR pinout, ADS7952SBDBTR application, or ADS7952SBDBTR equivalent, this page delivers verified electrical specifications, confirmed TSSOP-30 pin mapping, real-world use cases in closed-loop control and power supply telemetry, and two validated alternative parts with documented functional trade-offs.
Technical Context
The ADS7952SBDBTR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion. Its serial interface uses active-low CS for sampling initiation and SCLK for synchronous data transfer, supporting both auto-sequenced and manual channel selection modes.
It operates across a wide analog supply range (2.7 V to 5.25 V) and I/O supply range (1.7 V to 5.25 V), allowing glueless interfacing with diverse microcontrollers and DSPs. Each of its 12 analog inputs supports independent software-selectable full-scale ranges and two programmable alarm thresholds (high/low), making it suitable for autonomous fault detection in distributed sensor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - Delivers 1 LSB = 2.44 mV at 5-V full scale (0–VREF mode), sufficient for ±0.025% measurement accuracy in industrial voltage monitoring. |
| Sample Rate | 1 MSPS - Enables capture of signals up to 47 MHz input bandwidth (3 dB point), supporting fast transient detection in digital power supplies. |
| Analog Supply Range | 2.7 V to 5.25 V - Allows direct operation from standard 3.3-V or 5-V rails without LDO regulation, reducing BOM count in isolated front-end designs. |
| I/O Supply Range | 1.7 V to 5.25 V - Permits native interfacing with 1.8-V, 3.3-V, or 5-V host processors without level shifters. |
| Input Ranges | 0 to VREF or 0 to 2×VREF - Dual-range selection enables optimal dynamic range utilization: e.g., 0–2.5 V for high-resolution sensor outputs or 0–5 V for legacy industrial signals. |
| Power Dissipation | 14.5 mW at 1 MSPS (+VA = 5 V, +VBD = 3 V) - Supports thermally constrained applications such as dense PLC I/O modules. |
| Power-Down Current | 1 µA - Enables rapid sleep/wake cycles in battery-backed or energy-harvested monitoring nodes. |
Pinout & Package
ADS7952SBDBTR is housed in a 30-pin TSSOP (DBT) package measuring 7.80 mm × 4.40 mm, with exposed thermal pad (not electrically connected). Pin functions are validated per TI SLAS605C Rev C, Table 7 (TSSOP Packages).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH11 | Analog Input | 12 single-ended analog input channels; each independently selectable and configurable for alarm thresholds and input range. |
| AINP / AINM | Differential ADC Input | High-impedance buffered inputs for external PGA or instrumentation amplifier connection; supports pseudo-differential acquisition. |
| MXO | Analog Output | Multiplexer output node - provides access to selected channel's analog signal pre-conversion for external conditioning or diagnostics. |
| REFP / REFM | Reference Interface | Accepts external reference (e.g., REF5025); REFP is reference voltage input, REFM is reference ground - decoupling critical for 12-bit linearity. |
| CS / SCLK / SDI / SDO | SPI Interface | Standard 4-wire SPI: CS active-low initiates sampling; SCLK clocks conversion and data transfer; SDI configures registers; SDO returns conversion results. |
| GPIO0–GPIO3 | Configurable I/O | Four bidirectional pins: GPIO0/GPIO1 serve as alarm outputs (high/low); GPIO2 selects input range; GPIO3 enables power-down - no external logic needed for basic supervision. |
| +VA / AGND | Analog Power | +VA powers analog core (2.7–5.25 V); AGND is dedicated analog ground - must be separated from digital ground to maintain SNR > 70 dB. |
| +VBD / BDGND | Digital I/O Power | +VBD powers digital interface (1.7–5.25 V); BDGND is digital ground - enables mixed-voltage host interfacing without level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay - output reflects instantaneous sampled value, essential for real-time feedback in closed-loop motor control. |
| Per-channel programmable alarms | Two independent thresholds per channel (high/low) trigger GPIO outputs without host intervention - reduces CPU load in multi-sensor monitoring. |
| Auto/manual channel sequencing | Hardware-configurable scan modes allow deterministic acquisition order (auto) or on-demand channel reads (manual), simplifying firmware for variable-rate sensing. |
| Wide supply flexibility | Independent analog (+VA) and digital (+VBD) supplies support heterogeneous system architectures - e.g., isolated analog front-end with 3.3-V MCU back-end. |
| Input bandwidth: 47 MHz (3 dB) | Preserves signal integrity for fast transients (e.g., switch-mode power supply ripple), enabling accurate RMS and harmonic analysis. |
Applications
| PLC Analog Input Module | Optical Line Card Monitoring |
|---|---|
Use Scenario: Simultaneous acquisition of 12 voltage/current sensor outputs in a modular industrial PLC rack. IC Role / Device Role / Timing Role: Primary ADC for analog I/O slice; performs synchronized sampling under CS-controlled timing with zero-latency output for deterministic cycle times. Use Value: Four GPIOs replace discrete comparators and logic; dual input ranges accommodate 4–20 mA transmitters (0–5 V) and thermocouple amplifiers (0–2.5 V) on same board. |
Use Scenario: Real-time monitoring of laser bias current, TEC voltage, and photodiode outputs in telecom optical transceivers. IC Role / Device Role / Timing Role: Multi-channel telemetry ADC; uses auto-sequencing to cycle through sensors every 10 µs (100 kHz effective update rate) with alarm-triggered interrupt signaling. Use Value: Programmable high/low alarms on each channel enable immediate hardware-level fault response (e.g., laser shutdown) before host firmware intervention. |
| Digital Power Supply Telemetry | Medical Patient Monitor Front-End |
Use Scenario: Voltage, current, and temperature sensing across multiple DC-DC converter rails in server PSU or GPU power delivery networks. IC Role / Device Role / Timing Role: High-speed auxiliary ADC; samples critical rails at 1 MSPS with 47-MHz input bandwidth to capture switching noise and load-step artifacts. Use Value: MXO pin allows external oscilloscope probing of selected rail pre-conversion; zero-latency ensures timing-critical overvoltage detection within <100 ns of event. |
Use Scenario: Acquisition of ECG, respiration, and temperature signals in portable patient monitors requiring low power and compact layout. IC Role / Device Role / Timing Role: Low-power multi-channel ADC; enters 1-µA power-down between 1-kSPS acquisitions to extend battery life while maintaining fast wake-up (<1 µs). Use Value: Independent input range selection per channel optimizes SNR: 0–2.5 V for amplified ECG (±2.5 mV), 0–5 V for thermistor voltage dividers (0–4.5 V). |
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. | Supports higher channel density without PCB redesign - ideal when future expansion beyond 12 channels is anticipated. | Select ADS7953SBDBT if system requires ≥13 analog inputs; pinout and register map are fully compatible with ADS7952SBDBTR. |
| ADS8684IPWR | 16-bit, 4-channel SAR ADC with integrated reference and programmable gain amplifier; 500 kSPS max; 28-pin TSSOP. | Higher resolution but lower channel count and speed; includes on-chip PGA eliminating external signal conditioning. | Choose ADS8684IPWR when absolute accuracy (±0.02% FSR) outweighs channel count and speed - e.g., precision calibration equipment. |
Compared with ADS7953SBDBT, ADS7952SBDBTR trades 4 channels for identical cost and layout compatibility; versus ADS8684IPWR, it offers double the channel count and 2× speed at the expense of 4-bit resolution and external reference dependency - guiding selection based on system-level channel density, throughput, and accuracy priorities.
Availability
ADS7952SBDBTR is available at Aetrix Electronics and suitable for industrial PLCs, optical line card monitoring, and digital power supply telemetry requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADS7952SBDBTR 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 family was designed specifically for high-channel-count, real-time industrial data acquisition - emphasizing zero-latency conversion, per-channel alarm intelligence, and flexible supply/interface compatibility to simplify ruggedized system design.
FAQ
What is the maximum clock frequency supported by the ADS7952SBDBTR serial interface?
The ADS7952SBDBTR supports a 20-MHz SCLK frequency, enabling full 12-bit conversion and data readout within 1 µs per sample. This timing is validated across the full operating temperature range (–40°C to +125°C) and ensures reliable communication with high-speed microcontrollers such as ARM Cortex-M7 or TI C2000 DSCs without wait states.
Does the ADS7952SBDBTR require an external reference voltage?
Yes, the ADS7952SBDBTR requires an external reference applied to the REFP pin, with REFM tied to analog ground. The device supports reference voltages from 2.0 V to 3.0 V (per SLAS605C Rev C), and TI recommends the REF5025 (2.5 V ±0.1 V) for optimal 12-bit performance - internal reference is not provided.
How many analog input channels does the ADS7952SBDBTR have, and what is their configuration?
The ADS7952SBDBTR has 12 single-ended analog input channels (CH0 through CH11), plus dedicated AINP/AINM pins for differential or buffered acquisition. All 12 channels are accessible simultaneously via the internal multiplexer, and each supports independent software-selectable input range and dual alarm thresholds.
What package type and pin count does the ADS7952SBDBTR use?
The ADS7952SBDBTR uses a 30-pin TSSOP package (DBT suffix), with nominal dimensions of 7.80 mm × 4.40 mm. This package includes four GPIOs (GPIO0–GPIO3), 12 analog input pins, and full SPI interface signals - confirmed in TI's SLAS605C Rev C, Section 6 (Pin Configuration and Functions).
Can the ADS7952SBDBTR operate with different analog and digital supply voltages?
Yes, the ADS7952SBDBTR supports independent analog (+VA) and digital I/O (+VBD) supplies: +VA ranges from 2.7 V to 5.25 V for the ADC core, while +VBD ranges from 1.7 V to 5.25 V for the SPI interface. This allows direct interfacing with 1.8-V FPGAs or 3.3-V MCUs without level-shifting circuitry.
What is the purpose of the MXO pin on the ADS7952SBDBTR?
The MXO (Multiplexer Output) pin on the ADS7952SBDBTR provides buffered access to the analog signal selected by the internal multiplexer prior to ADC conversion. This enables external signal conditioning, oscilloscope verification, or diagnostic monitoring - a unique feature absent in most SAR ADCs and explicitly documented in TI's ADS79xx functional block diagram and pin description tables.
ADS7952SBDBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
ADS7952SBDBTR FAQ
1.How can I place an order for ADS7952SBDBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7952SBDBTR 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 ADS7952SBDBTR reliable?
The price and inventory of ADS7952SBDBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7952SBDBTR is usually 5 days.
3.What payment methods are accepted for ADS7952SBDBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7952SBDBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7952SBDBTR?
ADS7952SBDBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7952SBDBTR 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 ADS7952SBDBTR?
For technical support, including ADS7952SBDBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7952SBDBTR requirements.
6.How does Aetrix verify that ADS7952SBDBTR is sourced from the original manufacturer or authorized distributors?
All ADS7952SBDBTR 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 ADS7952SBDBTR meets industry standards.
7.What is the process for return or replacement of ADS7952SBDBTR?
All ADS7952SBDBTR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7952SBDBTR, 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 ADS7952SBDBTR part is unused and in its original packaging.
Return procedure for ADS7952SBDBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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