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Texas Instruments ADS7952SBRHBR
- Part No.:
- ADS7952SBRHBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ADS7952SBRHBR.pdf
- Description:
- IC ADC 12BIT SAR 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,781
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Product details
Overview
ADS7952SBRHBR 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 20-MHz serial interface. It features two software-selectable unipolar input ranges (0 to VREF and 0 to 2×VREF), programmable per-channel high/low alarm thresholds, and operates from 2.7–5.25 V analog supply. It is used in industrial PLCs for real-time analog signal monitoring across multiple sensor inputs.
For engineers reviewing the ADS7952SBRHBR datasheet, ADS7952SBRHBR pinout, ADS7952SBRHBR application, or ADS7952SBRHBR equivalent, key selection considerations include channel count (12), resolution (12-bit), serial interface timing (20-MHz SCLK), alarm threshold configurability, and TSSOP-38 package compatibility with other ADS79xx family members.
Technical Context
The ADS7952SBRHBR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling zero-latency conversion. Its serial interface uses active-low CS for sampling initiation and SCLK for synchronous data transfer, supporting both auto-sequencing and manual channel selection modes.
It supports dual input voltage ranges via the GPIO2 (Range) pin, accepts external reference (REFP/REFM), and provides four individually configurable GPIOs (GPIO0–GPIO3) in the TSSOP package - including dedicated alarm outputs and power-down control - making it suitable for closed-loop monitoring systems requiring deterministic timing and event-triggered responses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = VREF/4096 quantization step for precise sensor digitization in industrial control loops. |
| Sample Rate | 1 MSPS - enables capture of fast transients up to ~400 kHz (Nyquist-limited) in power supply or motor feedback monitoring. |
| Analog Supply Range | 2.7 V to 5.25 V - allows direct interfacing with common industrial rails (e.g., +3.3 V or +5 V) without level-shifting. |
| I/O Supply Range | 1.7 V to 5.25 V - ensures glueless connection to diverse host processors (ARM Cortex-M, DSPs) operating at 1.8 V or 3.3 V logic levels. |
| Input Bandwidth | 47 MHz at 3 dB - supports accurate digitization of signals with fast slew rates, critical for optical line card monitoring. |
| Power Dissipation | 14.5 mW at 1 MSPS (+VA = 5 V, +VBD = 3 V) - enables dense multi-channel data acquisition without thermal derating in compact enclosures. |
| Power-Down Current | 1 µA - reduces system standby power significantly during idle periods in battery-backed or isolated power applications. |
Pinout & Package
The ADS7952SBRHBR is housed in a 38-pin TSSOP package (9.70 mm × 4.40 mm) with exposed thermal pad. Pin functions are validated per TI SLAS605C Rev C (July 2018), specifically for the ADS7952 variant in DBT package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH11 | Analog input | Twelve single-ended analog input channels; each routed through internal multiplexer to AINP/AINM for conversion. |
| AINP / AINM | Differential analog input pair | Accepts buffered or unbuffered input signal; AINM serves as reference return for pseudo-differential measurement. |
| MXO | Analog output | Multiplexer output node - provides access to selected channel's analog signal pre-conversion (e.g., for external PGA monitoring). |
| REFP / REFM | Analog reference input | Accepts external precision reference (e.g., REF5025); defines full-scale range for all conversions (0 to VREF or 0 to 2×VREF). |
| CS / SCLK / SDI / SDO | Digital serial interface | 4-wire SPI-compatible interface; CS falling edge initiates sampling, SCLK clocks data in/out at up to 20 MHz. |
| GPIO0–GPIO3 | Programmable digital I/O | Four pins support alarm outputs (high/low), range selection (GPIO2), and power-down control (GPIO3); configurable via internal registers. |
| +VA / AGND / +VBD / BDGND | Power and ground | Separate analog/digital supplies reduce noise coupling; +VA powers core ADC, +VBD powers digital interface and GPIOs. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay - essential for real-time closed-loop control where immediate response to analog events is required. |
| Two programmable alarm thresholds per channel | Enables autonomous over/under-limit detection without host intervention, reducing CPU load in PLC scan cycles. |
| Auto-sequencing mode | Allows continuous round-robin conversion across preselected channels - simplifies firmware for uniform multi-sensor polling. |
| Pin-compatible family scaling | Shares footprint with 4-, 8-, 12-, and 16-channel variants (e.g., ADS7950–ADS7961), enabling hardware reuse across product tiers. |
| Wide input bandwidth (47 MHz) | Preserves signal integrity for high-frequency transients in digital power supply monitoring and optical receiver diagnostics. |
Applications
| PLC Analog Input Module | Optical Line Card Monitoring |
|---|---|
|
Use Scenario: Simultaneous acquisition of 12 temperature, pressure, and current loop signals in a modular industrial controller. IC Role / Device Role / Timing Role: Primary ADC managing all analog front-end digitization; zero-latency operation ensures deterministic sampling aligned to PLC scan cycle. Use Value: Reduces need for external multiplexing and buffering, lowering BOM cost and PCB area while maintaining 12-bit accuracy across channels. |
Use Scenario: Real-time monitoring of laser bias current, TEC voltage, and photodiode output in DWDM transponders. IC Role / Device Role / Timing Role: High-speed analog monitor capturing transient faults (e.g., sudden bias drift) with 1-MSPS rate and programmable alarms. Use Value: Enables immediate fault flagging via GPIO alarm outputs, allowing system-level shutdown before optical damage occurs. |
| Medical Patient Monitor Front-End | Digital Power Supply Telemetry |
|
Use Scenario: Digitizing ECG leads, respiration sensors, and SpO₂ analog outputs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Multi-channel ADC providing synchronized sampling across physiological signals; low 14.5 mW power supports battery operation. Use Value: Eliminates need for discrete op-amp buffers on each channel due to high-input-impedance PGA option, improving signal fidelity and reducing component count. |
Use Scenario: Measuring rail voltages, phase currents, and thermal sensors in server VRMs and telecom rectifiers. IC Role / Device Role / Timing Role: Telemetry ADC feeding real-time data to PMBus controllers; 20-MHz SCLK supports rapid register reads during dynamic load steps. Use Value: Dual input ranges (0–VREF / 0–2×VREF) allow optimal full-scale use for both low-voltage sense signals and higher bus measurements without external gain switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953SBRHBR | 16-channel, same 12-bit resolution and 1-MSPS rate; identical TSSOP-38 package and pinout. | Supports larger sensor arrays (e.g., 16-sensor industrial IO modules); requires no layout change but may increase firmware complexity. | Select when future scalability to >12 channels is required; pin-compatible drop-in upgrade path. |
| ADS7960SBRHBR | 12-channel, 8-bit resolution; otherwise identical timing, interface, and package. | Suitable for lower-precision applications like basic status monitoring where 256-level resolution suffices. | Choose for cost-sensitive designs where 12-bit precision is unnecessary; maintains identical PCB layout and driver code. |
Compared with ADS7952SBRHBR, ADS7953SBRHBR extends channel count without sacrificing speed or accuracy, while ADS7960SBRHBR trades resolution for reduced cost and power - both retain full pin and software compatibility within the ADS79xx family.
Availability
ADS7952SBRHBR is available at Aetrix Electronics and suitable for industrial PLCs, optical line card monitoring, medical instrumentation, digital power supplies, and high-speed closed-loop systems requiring stable component supply and long-term manufacturability.
Supply support for ADS7952SBRHBR 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 - emphasizing pin compatibility, flexible alarm handling, and robust serial interfacing for PLC, test equipment, and telecom infrastructure applications.
FAQ
What is the maximum serial clock frequency supported by the ADS7952SBRHBR?
The ADS7952SBRHBR supports a maximum SCLK frequency of 20 MHz, enabling fast data readout and minimizing conversion-to-readout latency. This timing is specified under recommended operating conditions (VBD = 1.7 V to +VA) and allows full 12-bit data transfer within 12 SCLK cycles per conversion. The ADS7952SBRHBR maintains timing compliance across its full temperature and supply range.
Does the ADS7952SBRHBR require an external reference voltage?
Yes, the ADS7952SBRHBR requires an external reference applied to REFP and REFM pins. It does not include an internal reference. A precision source such as the REF5025 (2.5 V ± 0.1 V) is recommended to achieve specified total unadjusted error (TUE). The ADS7952SBRHBR supports two input ranges (0 to VREF and 0 to 2×VREF) selectable via GPIO2, so reference stability directly impacts full-scale accuracy.
How many GPIOs are available on the ADS7952SBRHBR, and what functions do they support?
The ADS7952SBRHBR provides four GPIOs (GPIO0–GPIO3) in its TSSOP-38 package. GPIO0 and GPIO1 serve as programmable alarm outputs (high/low threshold flags), GPIO2 selects input range (0 → 0–VREF, 1 → 0–2×VREF), and GPIO3 is an active-low power-down input. All are software-configurable via internal registers, and their states persist across conversions - a feature confirmed in the ADS7952SBRHBR device-specific register map.
Is the ADS7952SBRHBR pin-compatible with other devices in the ADS79xx family?
Yes, the ADS7952SBRHBR is fully pin-compatible with ADS7950–ADS7961 in the same package variant: the 38-pin TSSOP (DBT) package. This includes identical pin assignments for CH0–CH11, REFP/REFM, AINP/AINM, MXO, CS/SCLK/SDI/SDO, and GPIO0–GPIO3. This compatibility enables hardware reuse across 4-, 8-, 12-, and 16-channel versions without PCB redesign - a documented design feature of the ADS79xx family.
What is the purpose of the MXO pin on the ADS7952SBRHBR?
The MXO (Multiplexer Output) pin on the ADS7952SBRHBR provides buffered access to the analog signal selected by the internal multiplexer prior to ADC conversion. It allows external circuitry - such as a high-input-impedance PGA (e.g., THS4031) or oscilloscope probe - to monitor the active channel in real time. This capability is explicitly documented in the ADS7952SBRHBR functional block diagram and pin description table, supporting debugging and signal integrity verification.
ADS7952SBRHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 32-VFQFN Exposed Pad
- 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:
- 32-VQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7952SBRHBR FAQ
1.How can I place an order for ADS7952SBRHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7952SBRHBR 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 ADS7952SBRHBR reliable?
The price and inventory of ADS7952SBRHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7952SBRHBR is usually 5 days.
3.What payment methods are accepted for ADS7952SBRHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7952SBRHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7952SBRHBR?
ADS7952SBRHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7952SBRHBR 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 ADS7952SBRHBR?
For technical support, including ADS7952SBRHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7952SBRHBR requirements.
6.How does Aetrix verify that ADS7952SBRHBR is sourced from the original manufacturer or authorized distributors?
All ADS7952SBRHBR 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 ADS7952SBRHBR meets industry standards.
7.What is the process for return or replacement of ADS7952SBRHBR?
All ADS7952SBRHBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7952SBRHBR, 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 ADS7952SBRHBR part is unused and in its original packaging.
Return procedure for ADS7952SBRHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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