My Inquiry
My Account
Texas Instruments ADS7954SDBTR
- Part No.:
- ADS7954SDBTR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 30-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS7954SDBTR.pdf
- Description:
- IC ADC 10BIT SAR 30TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,435
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7954SDBTR from Texas Instruments is a 10-bit, 4-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), programmable per-channel high/low alarm thresholds, and operates from 2.7–5.25 V analog supply. It is used in multi-channel signal monitoring within PLCs and digital power supplies.
For engineers reviewing the ADS7954SDBTR datasheet, ADS7954SDBTR pinout, ADS7954SDBTR application, or ADS7954SDBTR equivalent, key selection considerations include its 4-channel count, 10-bit resolution, TSSOP-30 package footprint, GPIO0–GPIO3 configurability (TSSOP variant), and support for auto/manual channel sequencing in industrial data acquisition systems.
Technical Context
The ADS7954SDBTR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion-critical for closed-loop control. Its serial interface uses active-low CS for sampling initiation and SCLK for synchronous data transfer, supporting both auto-sequenced and manually selected channel conversions.
It accepts dual input voltage ranges via the RANGE pin (GPIO2), supports independent alarm threshold programming per channel, and provides four configurable GPIOs (GPIO0–GPIO3) in the TSSOP-30 package-used for alarm outputs, power-down control, or range selection-while maintaining compatibility with the broader ADS79xx family's timing and register map.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for medium-precision industrial sensing and monitoring. |
| Sample Rate | 1 MSPS - enables real-time capture of fast transients in power supply feedback loops or motor control signals. |
| Input Channels | 4 single-ended - supports simultaneous monitoring of up to four independent analog signals without external multiplexing. |
| 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 systems) without LDO regulation. |
| I/O Supply Range | 1.7 V to 5.25 V - ensures glueless SPI connectivity with low-voltage microcontrollers (e.g., 1.8 V or 3.3 V logic). |
| Input Ranges | 0 to VREF or 0 to 2×VREF - selectable via RANGE pin to optimize dynamic range for varying sensor output amplitudes. |
| Power Dissipation | 14.5 mW at 1 MSPS (+VA = 5 V, +VBD = 3 V) - suitable for thermally constrained embedded modules and isolated power domains. |
| Power-Down Current | 1 µA - enables rapid entry/exit from ultra-low-power state during idle periods in battery-backed or energy-sensitive designs. |
Pinout & Package
The ADS7954SDBTR 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 defined per TI SLAS605C Rev C, and all NC pins must be grounded-not left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog Input | Four single-ended analog input channels; routed internally to multiplexer and ADC core. |
| AINP / AINM | Differential Input Pair | Optional pseudo-differential mode using AINP as signal and AINM as reference; supports ratiometric measurements. |
| MXO | Analog Output | Multiplexer output node-provides buffered access to selected channel for external PGA or filter stages. |
| REFP / REFM | Reference Interface | Accepts external precision reference (e.g., REF5025); REFP is reference input, REFM is reference ground. |
| CS / SCLK / SDI / SDO | SPI Interface | Standard 4-wire SPI: CS active-low initiates sampling; SCLK clocks data; SDI configures registers; SDO returns conversion results. |
| GPIO0–GPIO3 | Configurable I/O | Four bidirectional pins: GPIO0 = Alarm, GPIO1 = Low-alarm, GPIO2 = RANGE, GPIO3 = PD (active-low power-down). |
| +VA / AGND | Analog Power | +VA powers analog circuitry (2.7–5.25 V); AGND is dedicated analog ground-must be separated from digital ground. |
| +VBD / BDGND | Digital I/O Power | +VBD powers digital interface (1.7–5.25 V); BDGND is digital ground-separate from AGND but tied at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay-output reflects sampled value on same SCLK cycle, essential for real-time control feedback. |
| Per-channel programmable alarms | Two independent threshold registers per channel enable autonomous over/under-limit detection without host intervention. |
| Auto/manual channel sequencing | Hardware-configurable mode allows fixed sequence (auto) or on-demand selection (manual), simplifying firmware for mixed-signal tasks. |
| Wide supply flexibility | Independent analog (+VA) and digital I/O (+VBD) supplies allow mixed-voltage system integration without level shifters. |
| High input bandwidth | 47 MHz (–3 dB) supports accurate digitization of fast-rising sensor outputs and switching power supply waveforms. |
| Low-power power-down mode | 1 µA quiescent current reduces system-level standby power-critical for always-on monitoring nodes in industrial IoT. |
Applications
| PLC Analog Input Module | Digital Power Supply Monitoring |
|---|---|
|
Use Scenario: Monitoring four independent voltage/current feedback signals from power stages in a modular AC/DC converter. IC Role / Device Role / Timing Role: ADC front-end for real-time loop supervision-sampling CH0–CH3 at 1 MSPS with zero latency to feed PID controller. Use Value: Enables precise, deterministic sampling of fast-switching waveforms without added jitter or pipeline delay. |
Use Scenario: Simultaneous readback of output voltage, output current, temperature, and fan speed in a telecom rectifier unit. IC Role / Device Role / Timing Role: Multi-channel acquisition engine-using auto-sequencing to cycle through sensors every 1 µs. Use Value: Reduces MCU polling overhead and eliminates need for external multiplexer timing logic or additional ADCs. |
| Optical Line Card Health Monitoring | Industrial Sensor Data Logger |
|
Use Scenario: Tracking bias currents and photodiode outputs across four transceiver lanes in a fiber optic line card. IC Role / Device Role / Timing Role: Signal conditioning interface-converting analog monitor outputs into digital values for diagnostics and calibration. Use Value: Programmable alarm thresholds trigger immediate fault reporting before optical performance degrades beyond spec. |
Use Scenario: Battery-powered field logger capturing environmental sensor data (voltage, pressure, humidity, light) at sub-second intervals. IC Role / Device Role / Timing Role: Low-power acquisition subsystem-entering 1 µA power-down between samples to extend battery life. Use Value: 14.5 mW active power and 1 µA shutdown current enable >1-year operation on a single CR123A cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953SDBT | 12-bit resolution, 16-channel, same TSSOP-30 package and pinout-requires no PCB change but increases data width and channel count. | Used where higher precision and more inputs are needed (e.g., full PLC I/O module), not for 4-channel cost-optimized designs. | Select ADS7953SDBT only if 12-bit accuracy and 16-channel scalability are required; ADS7954SDBTR remains optimal for 4-channel 10-bit use cases. |
| ADS7950SDBT | 12-bit resolution, 4-channel, identical TSSOP-30 footprint-pin-compatible but higher resolution and slightly higher power (15.2 mW). | Preferred when sensor signal chain supports 12-bit fidelity (e.g., high-accuracy current shunt measurement) and margin exists in power budget. | Choose ADS7950SDBT for upgraded precision without layout changes; ADS7954SDBTR offers better cost/power trade-off for 10-bit requirements. |
Compared with ADS7953SDBT and ADS7950SDBT, the ADS7954SDBTR delivers optimal balance of 10-bit resolution, 4-channel count, and 14.5 mW power at 1 MSPS-making it the most cost- and power-efficient choice for mid-precision industrial monitoring where extra bits or channels are unnecessary.
Availability
ADS7954SDBTR is available at Aetrix Electronics and suitable for PLC analog input modules, digital power supply monitoring, and optical line card health monitoring requiring stable component supply and long-term industrial availability.
Supply support for ADS7954SDBTR 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 IC design.
The ADS79xx product line was engineered specifically for high-speed, multi-channel industrial data acquisition-emphasizing zero-latency operation, flexible supply interfaces, and integrated alarm functionality to reduce system-level complexity.
FAQ
What is the maximum sample rate supported by the ADS7954SDBTR?
The ADS7954SDBTR supports a maximum sample rate of 1 MSPS (1 million samples per second) under recommended operating conditions. This rate is achievable with a 20-MHz SCLK and proper CS timing, and is specified across the full temperature range (–40°C to +125°C) with 10-bit accuracy maintained.
Does the ADS7954SDBTR require an external reference voltage?
Yes, the ADS7954SDBTR requires an external reference voltage applied to the REFP pin, with REFM serving as reference ground. The device supports two input ranges: 0 to VREF and 0 to 2×VREF, selected via the RANGE pin (GPIO2). A precision reference such as the REF5025 is recommended for optimal accuracy.
How many GPIOs does the ADS7954SDBTR provide, and what are their functions?
The ADS7954SDBTR in the TSSOP-30 package provides four GPIOs: GPIO0 (alarm output), GPIO1 (low-alarm output), GPIO2 (RANGE select), and GPIO3 (active-low power-down). All are programmable via internal registers and support both input and output modes-enabling autonomous alarm signaling and flexible power management without host processor involvement.
Is the ADS7954SDBTR pin-compatible with other devices in the ADS79xx family?
Yes, the ADS7954SDBTR shares the same 30-pin TSSOP (DBT) footprint and pinout with ADS7950SDBT, ADS7951SDBT, and ADS7953SDBT. This allows hardware reuse across 4-, 8-, 12-, and 16-channel variants-though register configurations and channel mapping differ and must be verified per device datasheet.
What is the purpose of the MXO pin on the ADS7954SDBTR?
The MXO (Multiplexer Output) pin on the ADS7954SDBTR provides buffered access to the selected analog input channel before ADC conversion. It enables connection to external signal conditioning-such as a high-input-impedance PGA (e.g., THS4031)-to boost weak signals without loading the source, preserving accuracy in high-impedance sensor applications.
ADS7954SDBTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 30-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4
- 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:
- 30-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7954SDBTR FAQ
1.How can I place an order for ADS7954SDBTR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7954SDBTR 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 ADS7954SDBTR reliable?
The price and inventory of ADS7954SDBTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7954SDBTR is usually 5 days.
3.What payment methods are accepted for ADS7954SDBTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7954SDBTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7954SDBTR?
ADS7954SDBTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7954SDBTR 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 ADS7954SDBTR?
For technical support, including ADS7954SDBTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7954SDBTR requirements.
6.How does Aetrix verify that ADS7954SDBTR is sourced from the original manufacturer or authorized distributors?
All ADS7954SDBTR 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 ADS7954SDBTR meets industry standards.
7.What is the process for return or replacement of ADS7954SDBTR?
All ADS7954SDBTR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7954SDBTR, 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 ADS7954SDBTR part is unused and in its original packaging.
Return procedure for ADS7954SDBTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7954SDBTR 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…
