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Texas Instruments ADS7954SRGET
- Part No.:
- ADS7954SRGET
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ADS7954SRGET.pdf
- Description:
- IC ADC 10BIT SAR 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,367
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Product details
Overview
ADS7954SRGET 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 ADS7954SRGET datasheet, ADS7954SRGET pinout, ADS7954SRGET application, or ADS7954SRGET equivalent, key selection considerations include its 4-channel count, 10-bit resolution, TSSOP-30 package footprint, GPIO0–GPIO3 configurability (four pins in TSSOP), and support for auto/manual channel sequencing in real-time data acquisition systems.
Technical Context
The ADS7954SRGET implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling zero-latency conversion critical for closed-loop control. Its serial interface uses active-low CS, SCLK, SDI, and SDO signals, with sampling triggered on the falling edge of CS and conversion synchronized to SCLK.
It supports dual input voltage ranges via the RANGE pin (GPIO2), provides two independently programmable alarm thresholds per channel, and allows flexible channel selection through either auto-sequencing (Auto-1/Auto-2 modes) or manual addressing. The device includes four individually configurable GPIOs in the TSSOP-30 package, one of which (GPIO0) serves as an active-high alarm output.
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 - supports real-time capture of fast transients in power supply telemetry and motor control feedback loops. |
| Input Channels | 4 single-ended - enables simultaneous monitoring of four independent analog signals without external multiplexer hardware. |
| Analog Supply Range | 2.7 V to 5.25 V - compatible with standard 3.3 V and 5 V system rails, simplifying power domain integration. |
| I/O Supply Range | 1.7 V to 5.25 V - ensures glueless interfacing with diverse host processors including low-voltage MCUs and FPGAs. |
| 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) - enables thermally constrained designs in dense industrial modules. |
| Power-Down Current | 1 µA - reduces standby power in battery-backed or energy-sensitive applications during idle periods. |
Pinout & Package
The ADS7954SRGET is housed in a 30-pin TSSOP package (7.80 mm × 4.40 mm) with exposed thermal pad. All pins are electrically defined; NC pins (11, 12, 13, 14, 15, 16) must be connected to ground per datasheet guidance.
| 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 analog input pair | Optional pseudo-differential mode using external circuitry; AINP accepts signal, AINM serves as reference return. |
| MXO | Analog output | Multiplexer output node - provides buffered access to selected channel's analog signal before ADC sampling. |
| REFP / REFM | Analog reference inputs | Accept external reference voltage (e.g., REF5025); REFP is positive reference, REFM is reference ground. |
| CS / SCLK / SDI / SDO | Digital serial interface | SPI-compatible control: CS (active-low chip select), SCLK (20 MHz max), SDI (configuration/write), SDO (data read). |
| GPIO0–GPIO3 | Configurable digital I/O | Four bidirectional pins; GPIO0 defaults to active-high alarm output; others support general-purpose control or status signaling. |
| +VA / AGND | Analog power domain | +VA powers analog circuitry (2.7–5.25 V); AGND is dedicated analog ground plane-critical for noise-sensitive ADC performance. |
| +VBD / BDGND | Digital I/O power domain | +VBD powers digital interface (1.7–5.25 V); BDGND is isolated digital ground-enables level-shifting and noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay, enabling immediate response in high-speed closed-loop control systems like digital power supply regulation. |
| Per-channel programmable alarms | Two independent threshold registers per channel allow autonomous over/under-range detection without host CPU intervention. |
| Auto-sequencing channel selection | Reduces firmware overhead by automatically cycling through preconfigured channels (Auto-1/Auto-2 modes) in continuous acquisition. |
| Wide input voltage range support | 0 to VREF or 0 to 2×VREF selection accommodates both low-output sensors (e.g., current shunts) and high-amplitude signals (e.g., line voltage monitors). |
| Low-power power-down mode | 1 µA shutdown current extends battery life in portable test equipment and remote sensor nodes between measurement bursts. |
| High input bandwidth | 47 MHz (3 dB) analog input bandwidth preserves signal integrity for fast-rising transients in motor drive current sensing. |
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: ADS7954SRGET acts as the primary 10-bit ADC front-end, digitizing analog outputs from isolated amplifiers at 1 MSPS with zero latency to support real-time duty-cycle adjustment. Use Value: Enables precise, deterministic sampling of fast-switching waveforms without pipeline delay, improving regulation accuracy and transient response. |
Use Scenario: Simultaneous acquisition of input voltage, output voltage, output current, and temperature in a telecom rectifier unit. IC Role / Device Role / Timing Role: ADS7954SRGET serves as the multi-channel telemetry ADC, interfacing directly to the PMU controller via SPI while managing alarm thresholds for fault detection. Use Value: Four integrated channels eliminate external MUX, reducing BOM count and PCB area; programmable alarms trigger immediate shutdown on overvoltage/overcurrent events. |
| Industrial Motor Drive Feedback | Optical Line Card Health Monitoring |
|
Use Scenario: Sampling phase currents and DC-link voltage in a three-phase inverter with embedded protection logic. IC Role / Device Role / Timing Role: ADS7954SRGET functions as the real-time analog monitor, using GPIO0 as active-high overcurrent alarm output tied to gate driver disable input. Use Value: Hardware-level alarm assertion bypasses software polling, cutting fault response time to sub-microsecond levels for IGBT safety. |
Use Scenario: Monitoring bias voltages, photodiode currents, and TEC driver outputs across multiple optical transceivers on a line card. IC Role / Device Role / Timing Role: ADS7954SRGET provides compact, low-power 4-channel digitization for passive health telemetry, operating from 3.3 V analog and I/O supplies. Use Value: 14.5 mW typical power at 1 MSPS allows dense integration on power-limited line cards; TSSOP-30 footprint supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953SRGET | 12-bit resolution, 16-channel configuration, same 1-MSPS rate and TSSOP-38 package. | Higher precision and channel count suit complex data loggers; requires larger PCB footprint and different pinout. | Select when 12-bit resolution and >4 channels are required; not pin-compatible with ADS7954SRGET. |
| ADS7950SRGET | 12-bit resolution, 4-channel, identical TSSOP-30 package and pinout; differs only in resolution and internal reference handling. | Same physical integration but higher precision; may require recalibration of alarm thresholds due to finer code steps. | Drop-in replacement for resolution upgrade where layout reuse is mandatory; shares identical mechanical and electrical interface. |
Compared with ADS7954SRGET, ADS7950SRGET offers higher 12-bit resolution in the same TSSOP-30 package for direct upgrade paths, while ADS7953SRGET provides greater channel density at the cost of larger TSSOP-38 packaging and non-interchangeable pin mapping.
Availability
ADS7954SRGET is available at Aetrix Electronics and suitable for PLC analog input modules, digital power supply telemetry, and industrial motor drive feedback systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADS7954SRGET 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 family-including ADS7954SRGET-is engineered for high-speed, multi-channel data acquisition in harsh industrial environments, emphasizing zero-latency operation, flexible alarm management, and robust serial interfacing for real-time control systems.
FAQ
What is the maximum sample rate of the ADS7954SRGET?
The ADS7954SRGET achieves a maximum sample rate of 1 million samples per second (1 MSPS). This rate is sustained across all four channels in auto-sequencing mode and is enabled by its 20-MHz SPI-compatible serial interface clock (SCLK). The device maintains full 10-bit accuracy and zero-latency operation at this speed, making it suitable for demanding real-time applications such as digital power supply control and motor current monitoring.
Does the ADS7954SRGET support differential input configurations?
The ADS7954SRGET does not support true differential input mode natively. It is specified for single-ended operation across CH0–CH3. However, the AINP and AINM pins provide a pseudo-differential interface option: AINP accepts the signal input while AINM serves as a dedicated analog return path, allowing external circuitry (e.g., instrumentation amplifier or THS4031 buffer) to condition differential signals prior to digitization by the ADS7954SRGET.
How many GPIOs does the ADS7954SRGET include, and what are their default functions?
The ADS7954SRGET includes four GPIOs (GPIO0–GPIO3) in its TSSOP-30 package. By default, GPIO0 functions as an active-high alarm output, GPIO1 as a low-alarm indicator, GPIO2 as the RANGE pin (selecting 0–VREF or 0–2×VREF input range), and GPIO3 as the PD (power-down) input. All four pins are programmable via internal registers and can be reconfigured as general-purpose inputs or outputs depending on system requirements.
What reference voltage options are supported by the ADS7954SRGET?
The ADS7954SRGET requires an external reference voltage applied to the REFP pin, with REFM serving as the reference ground. It supports any stable reference between 2.0 V and 3.0 V (per datasheet Section 7.7), commonly implemented using TI's REF5025 (2.5 V ±0.1 V). The device uses this reference to define its full-scale input range, which can be configured as either 0 to VREF or 0 to 2×VREF via the RANGE pin (GPIO2), providing flexibility for varying sensor output levels.
Is the ADS7954SRGET pin-compatible with other devices in the ADS79xx family?
The ADS7954SRGET is pin-compatible with other 4-channel variants in the ADS79xx family that use the TSSOP-30 package, specifically ADS7950SRGET and ADS7958SRGET. These share identical pin assignments, package dimensions, and footprint. However, it is not pin-compatible with 8-, 12-, or 16-channel variants (e.g., ADS7951, ADS7952, ADS7953), which use different packages (TSSOP-30 vs. TSSOP-38) and distinct pin mappings for channel inputs and GPIOs.
ADS7954SRGET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 24-VFQFN Exposed Pad
- 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:
- 24-VQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7954SRGET FAQ
1.How can I place an order for ADS7954SRGET through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7954SRGET 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 ADS7954SRGET reliable?
The price and inventory of ADS7954SRGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7954SRGET is usually 5 days.
3.What payment methods are accepted for ADS7954SRGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7954SRGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7954SRGET?
ADS7954SRGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7954SRGET 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 ADS7954SRGET?
For technical support, including ADS7954SRGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7954SRGET requirements.
6.How does Aetrix verify that ADS7954SRGET is sourced from the original manufacturer or authorized distributors?
All ADS7954SRGET 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 ADS7954SRGET meets industry standards.
7.What is the process for return or replacement of ADS7954SRGET?
All ADS7954SRGET units undergo pre-shipment inspection (PSI). If there is an issue with ADS7954SRGET, 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 ADS7954SRGET part is unused and in its original packaging.
Return procedure for ADS7954SRGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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