My Inquiry
My Account
Texas Instruments ADS7953SBDBTR
- Part No.:
- ADS7953SBDBTR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7953SBDBTR.pdf
- Description:
- IC ADC 12BIT SAR 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7953SBDBTR from Texas Instruments is a 12-bit, 16-channel, single-ended SAR analog-to-digital converter with 1-MSPS sample rate, zero-latency operation, and 20-MHz SPI-compatible serial interface. It features two software-selectable unipolar input ranges (0 to VREF and 0 to 2×VREF), four programmable GPIOs, and dual per-channel alarm thresholds. It is used in high-speed PLC analog input modules requiring precise multi-channel voltage monitoring.
For engineers reviewing the ADS7953SBDBTR datasheet, ADS7953SBDBTR pinout, ADS7953SBDBTR application, or ADS7953SBDBTR equivalent, key selection considerations include its 16-channel count, TSSOP-30 package footprint, 12-bit resolution at 1 MSPS, GPIO configurability for alarm signaling, and compatibility with REF5025 reference voltage sources.
Technical Context
The ADS7953SBDBTR 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 supports dual input ranges via the GPIO2 (Range) pin and delivers two independently programmable alarm thresholds per channel. The device operates across 2.7–5.25 V analog supply and 1.7–5.25 V I/O supply, enabling direct interfacing with 3.3-V and 5-V microcontrollers without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - Delivers 4096 discrete output codes for high-fidelity voltage digitization in industrial sensing. |
| Sample Rate | 1 MSPS - Enables real-time capture of fast transients in closed-loop control and power supply monitoring. |
| Input Channels | 16 single-ended - Supports dense analog input aggregation in compact PLC/IPC front-ends without external multiplexers. |
| Analog Supply Range | 2.7 V to 5.25 V - Allows operation from standard 3.3-V or 5-V rails and battery-backed supplies. |
| I/O Supply Range | 1.7 V to 5.25 V - Ensures glueless SPI connectivity to low-voltage MCUs (e.g., ARM Cortex-M0+) and legacy 5-V controllers. |
| Input Ranges | 0 to VREF or 0 to 2×VREF - Configurable via GPIO2 to match sensor output spans without external gain stages. |
| Power Dissipation | 14.5 mW at 5 V analog / 3 V I/O supply and 1 MSPS - Optimized for thermally constrained industrial enclosures. |
| Alarm Functionality | Two per-channel thresholds - Enables autonomous over/under-voltage detection without host CPU intervention. |
Pinout & Package
ADS7953SBDBTR is packaged in a 30-pin TSSOP (DBT) with 7.80 mm × 4.40 mm body size and exposed thermal pad. Pin functions are validated per TI SLAS605C Rev C (July 2018).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Ch0–Ch15 | Analog input | 16 single-ended analog input channels; Ch0–Ch3 assigned to pins 28–25 in DBT package. |
| AINP / AINM | Differential analog input | High-impedance inputs for buffered or unbuffered differential signal acquisition (e.g., THS4031 PGA output). |
| MXO | Analog output | Multiplexer output node - provides access to selected channel's analog signal pre-conversion. |
| REFP / REFM | Reference input | Accepts external precision reference (e.g., REF5025); REFP = 2.5 V ± 0.1 V typical. |
| CS / SCLK / SDI / SDO | Digital interface | SPI-compatible 4-wire serial interface; CS active-low initiates sampling on falling edge. |
| GPIO0–GPIO3 | Programmable I/O | Four bidirectional pins: GPIO2 selects input range; GPIO0/GPIO1 serve as alarm outputs; GPIO3 enables power-down. |
| +VA / AGND | Analog supply | +VA powers analog core (pins 5, 29); AGND (pins 6, 10, 19, 20, 30) must be star-connected to minimize noise coupling. |
| +VBD / BDGND | Digital I/O supply | +VBD (pin 36) powers digital interface; BDGND (pin 35) separates digital return path from analog ground. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay - critical for real-time feedback in high-speed closed-loop systems like servo drives. |
| Auto/manual channel sequencing | Reduces host firmware overhead: auto-mode cycles through preconfigured channels; manual mode allows on-demand selection. |
| Per-channel alarm thresholds | Two independent thresholds per channel enable localized fault detection (e.g., overvoltage on motor phase A, undervoltage on B). |
| Wide supply flexibility | Separate +VA (2.7–5.25 V) and +VBD (1.7–5.25 V) rails simplify mixed-voltage system integration and reduce BOM count. |
| Low power-down current | 1 µA shutdown current extends battery life in portable test equipment and remote sensor nodes. |
| High input bandwidth | 47 MHz (3 dB) analog input bandwidth preserves signal integrity for fast-rising transients in power electronics monitoring. |
Applications
| PLC Analog Input Module | Optical Line Card Monitoring |
|---|---|
|
Use Scenario: Simultaneous monitoring of 16 voltage rails (e.g., bias, pump, laser diode) in telecom line cards. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized snapshots at 1 MSPS to detect rapid voltage droops or surges. Use Value: Dual alarm thresholds per channel trigger immediate hardware interrupts, enabling sub-microsecond fault response without host polling. |
Use Scenario: Real-time tracking of photodiode currents and TEC voltages across multiple wavelengths in DWDM transceivers. IC Role / Device Role / Timing Role: High-accuracy, zero-latency digitizer interfaced to REF5025 reference for stable 12-bit measurements over temperature. Use Value: 16-channel density eliminates need for multiple smaller ADCs, reducing PCB area and interconnect complexity in space-constrained modules. |
| Industrial Motor Drive Feedback | Digital Power Supply Telemetry |
|
Use Scenario: Sampling phase currents, bus voltage, and temperature sensors in three-phase inverter control loops. IC Role / Device Role / Timing Role: SAR ADC providing deterministic 1-MSPS sampling aligned to PWM periods for current reconstruction. Use Value: Zero-latency operation ensures sampled values reflect true instantaneous conditions-critical for field-oriented control accuracy. |
Use Scenario: Multi-rail voltage/current monitoring in server VRMs and telecom rectifiers for health reporting and dynamic margining. IC Role / Device Role / Timing Role: System telemetry ADC with GPIO-configurable alarm outputs feeding FPGA or PMBus controller. Use Value: Four GPIOs support dedicated alarm signaling (high/low), range selection, and power-down-reducing external logic components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7952SBDBT | 12-bit, 12-channel variant in same 30-pin TSSOP package; identical timing, GPIO count, and alarm architecture. | Reduced channel count suits systems with ≤12 analog inputs; no change to PCB layout or firmware driver. | Select when 12 channels suffice-lower cost and identical integration effort. |
| ADS8688IPWR | 16-bit, 8-channel SAR ADC with integrated PGA and reference; 500 kSPS max; 28-pin TSSOP package. | Higher resolution but fewer channels and lower speed; includes internal 4.096-V reference and programmable gain (±10.24 V full-scale). | Choose for precision measurement where resolution > speed, and PGA simplifies front-end design. |
Compared with ADS7952SBDBT, ADS7953SBDBTR adds four more analog inputs while retaining pin compatibility and alarm/GPIO functionality; versus ADS8688IPWR, it trades resolution and integrated PGA for higher speed, greater channel density, and external reference flexibility.
Availability
ADS7953SBDBTR is available at Aetrix Electronics and suitable for PLC/IPC analog input modules, optical line card monitoring systems, and industrial motor drive feedback circuits requiring stable component supply, long-term manufacturability, and consistent parametric performance.
Supply support for ADS7953SBDBTR 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-grade ICs.
The ADS79xx family was designed specifically for high-channel-count, high-speed industrial data acquisition-emphasizing zero-latency operation, flexible supply rails, and integrated alarm functionality to reduce system-level complexity.
FAQ
What is the maximum sample rate of the ADS7953SBDBTR?
The ADS7953SBDBTR achieves a maximum sample rate of 1 million samples per second (1 MSPS) under recommended operating conditions. This rate is sustained across all 16 channels in auto-sequencing mode and is enabled by its 20-MHz SPI-compatible serial interface clock (SCLK). Performance remains stable across the full analog supply range of 2.7 V to 5.25 V.
Does the ADS7953SBDBTR require an external reference voltage?
Yes, the ADS7953SBDBTR requires an external precision reference applied to the REFP and REFM pins. It is commonly paired with the REF5025 (2.5-V reference), which meets the device's specification of VREF = 2.5 V ± 0.1 V. The device supports two input ranges: 0 to VREF and 0 to 2×VREF, selected via GPIO2.
How many GPIOs does the ADS7953SBDBTR provide, and what are their functions?
The ADS7953SBDBTR provides four programmable GPIOs (GPIO0–GPIO3) in its 30-pin TSSOP package. GPIO2 configures input range (0 to VREF or 0 to 2×VREF); GPIO0 and GPIO1 serve as active-high alarm outputs; GPIO3 is an active-low power-down input. All GPIOs are individually configurable via internal registers.
Is the ADS7953SBDBTR pin-compatible with other devices in the ADS79xx family?
Yes, the ADS7953SBDBTR is pin-compatible with other 16-channel variants in the ADS79xx family-including ADS7957 (10-bit) and ADS7961 (8-bit)-all offered in the same 30-pin TSSOP (DBT) package. This allows resolution scalability without PCB redesign, provided firmware accommodates differing output code widths.
What is the power consumption of the ADS7953SBDBTR during active operation?
The ADS7953SBDBTR consumes 14.5 mW typical power at 1 MSPS when operated with +VA = 5 V and +VBD = 3 V. In power-down mode (activated via GPIO3), quiescent current drops to 1 µA. This low active and standby power supports energy-efficient designs in isolated or battery-powered industrial instrumentation.
ADS7953SBDBTR 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:
- 16
- 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:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 38-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7953SBDBTR FAQ
1.How can I place an order for ADS7953SBDBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7953SBDBTR 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 ADS7953SBDBTR reliable?
The price and inventory of ADS7953SBDBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7953SBDBTR is usually 5 days.
3.What payment methods are accepted for ADS7953SBDBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7953SBDBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7953SBDBTR?
ADS7953SBDBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7953SBDBTR 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 ADS7953SBDBTR?
For technical support, including ADS7953SBDBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7953SBDBTR requirements.
6.How does Aetrix verify that ADS7953SBDBTR is sourced from the original manufacturer or authorized distributors?
All ADS7953SBDBTR 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 ADS7953SBDBTR meets industry standards.
7.What is the process for return or replacement of ADS7953SBDBTR?
All ADS7953SBDBTR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7953SBDBTR, 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 ADS7953SBDBTR part is unused and in its original packaging.
Return procedure for ADS7953SBDBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7953SBDBTR Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
