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Texas Instruments SM73201IMM/NOPB
- Part No.:
- SM73201IMM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
SM73201IMM/NOPB.pdf
- Description:
- IC ADC 16BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,744
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Product details
Overview
SM73201IMM/NOPB from Texas Instruments is a 16-bit successive-approximation register (SAR) ADC with differential input, 250 kSPS maximum sampling rate, 93.2 dB SNR, and 85 dB common-mode rejection ratio - designed for high-accuracy solar DC arc detection and PV string monitoring in noisy industrial environments.
For engineers reviewing the SM73201IMM/NOPB datasheet, SM73201IMM/NOPB pinout, SM73201IMM/NOPB application, or SM73201IMM/NOPB equivalent, this page delivers verified specifications, VSSOP-10 pin mapping, real-world use cases in renewable energy systems, and two validated alternative parts with documented functional trade-offs.
Technical Context
The SM73201IMM/NOPB implements a capacitive redistribution SAR architecture with integrated sample-and-hold, maintaining true differential signal path from input pins through conversion to preserve CMRR. It supports independent analog (VA = 4.5–5.5 V) and digital I/O (VIO = 2.7–5.5 V) supplies, enabling mixed-voltage system interfacing.
Conversion is synchronized to an external SPI-compatible serial clock (1–5 MHz), requiring exactly 18 SCLK cycles per full 16-bit result. The device features zero-power track mode (ZPTM), entering ultra-low-power state (<15 µW) while continuously tracking input voltage - eliminating acquisition delay when re-entering conversion mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR - delivers 65,536 discrete output codes with no missing codes guaranteed. |
| Sampling Rate | 50–250 kSPS - supports real-time spectral analysis (e.g., FFT-based arc detection) at up to 250 kSPS with full 16-bit accuracy. |
| SNR | 93.2 dBc (typ, VREF = 4.5–5.5 V) - enables >14.5 ENOB for precise low-noise measurement of microvolt-level arc signatures. |
| CMRR | 85 dB - rejects common-mode noise from long PV string wiring, critical for reliable arc fault discrimination in EMI-heavy solar farms. |
| Power @ 250 kSPS | 5.8 mW (VA = 5 V) - allows battery-backed or energy-harvested operation in remote string monitors without thermal derating. |
| Reference Range | +0.5 V to VA - supports flexible scaling (e.g., 2.5 V reference for ±2.5 V input range or 5 V for ±5 V full-scale). |
| Operating Temp | −40°C to +85°C - qualified for outdoor PV combiner box and inverter control module deployment. |
Pinout & Package
SM73201IMM/NOPB is housed in a 10-lead Very Small Outline Package (VSSOP, package code DGS0010A), 3.0 mm × 3.0 mm × 1.0 mm body, 0.5 mm lead pitch, thermally enhanced for stable performance in compact solar electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference voltage input | Defines full-scale differential input range (±VREF); must be stable, low-noise source between 0.5 V and VA. |
| +IN | Non-inverting analog input | Differential input node; accepts signals from 0 V to VA with common-mode bias; paired with −IN for noise rejection. |
| −IN | Inverting analog input | Differential input node; matched to +IN for 85 dB CMRR; requires symmetrical layout and termination. |
| GND (pins 4, 5) | Analog ground return | Dual GND pins reduce ground bounce; must be connected to low-impedance analog ground plane near VA decoupling. |
| CS | Active-low chip select | Initiates conversion on falling edge; controls ZPTM entry (high = track mode, low = conversion mode). |
| DOUT | Serial data output | SPI-compatible MSB-first 2's complement output; tri-state when CS high; timing-critical for synchronous readout. |
| SCLK | Serial clock input | Drives internal conversion timing and data shift register; min 1 MHz / max 5 MHz; duty cycle not critical. |
| VIO | Digital I/O supply | Independent 2.7–5.5 V rail powers logic interface - enables direct connection to 3.3 V microcontrollers without level shifters. |
| VA | Analog supply | 4.5–5.5 V analog power; separate from VIO to isolate noise-sensitive SAR core from digital switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Maintains signal integrity across entire signal chain - enables 85 dB CMRR without external instrumentation amplifiers. |
| Zero-power track mode (ZPTM) | Consumes ≤15 µW while continuously tracking input voltage - eliminates wake-up latency and preserves signal fidelity during idle periods. |
| Independent VA and VIO supplies | Allows analog section to run at 5 V for optimal SNR while interfacing directly with 3.3 V host processors - reduces BOM count and layout complexity. |
| SPI/QSPI/MICROWIRE compatibility | Uses standard 3-wire interface (CS/SCLK/DOUT) - integrates seamlessly with TI C2000, STM32, and Renesas RA MCUs without custom drivers. |
| Wide VREF range (0.5 V to VA) | Supports flexible gain staging - e.g., 2.5 V reference for high-resolution current sensing or 5 V for full-string voltage monitoring. |
Applications
| PV DC Arc Detection System | Solar String Data Acquisition |
|---|---|
|
Use Scenario: Real-time monitoring of PV string voltage/current waveforms to detect high-frequency transient arcs indicative of insulation failure or loose connections. IC Role / Device Role / Timing Role: Primary high-speed, high-SNR ADC digitizing differential sensor outputs (e.g., Rogowski coil + shunt) at ≥200 kSPS for FFT-based spectral analysis. Use Value: 93.2 dB SNR and 85 dB CMRR enable reliable arc signature extraction amid grid-switching noise and lightning-induced transients in outdoor combiner boxes. |
Use Scenario: Continuous logging of string-level voltage, temperature, and irradiance in smart PV optimizers and monitoring gateways. IC Role / Device Role / Timing Role: Low-power, precision ADC acquiring calibrated analog sensor data at 50–100 kSPS for cloud telemetry and MPPT optimization algorithms. Use Value: 5.3 mW power at 200 kSPS and −40°C to +85°C rating allow uncooled, battery-assisted operation in rooftop and ground-mount enclosures. |
| I/O Module for Solar Inverters | Industrial Instrumentation & Control |
|
Use Scenario: Isolated analog input module in central/string inverters capturing grid-synchronized voltage and current for protection relay functions. IC Role / Device Role / Timing Role: High-accuracy SAR ADC providing time-aligned samples to FPGA or DSP for overvoltage, overcurrent, and anti-islanding detection. Use Value: 16-bit resolution with ±0.8 LSB INL ensures sub-0.1% measurement linearity required for UL 1741 SA compliance testing. |
Use Scenario: Precision sensor interface in programmable logic controllers (PLCs) and distributed I/O systems measuring strain gauges, RTDs, and pressure transducers. IC Role / Device Role / Timing Role: General-purpose differential ADC supporting multiple sensor types via programmable VREF and configurable input ranges. Use Value: True differential input and wide VREF range (0.5–5.5 V) eliminate need for external gain/level-shifting circuitry in multi-channel analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1 MSPS, single-ended input only; 92.5 dB SNR; requires external reference; no ZPTM mode. | Lacks differential input and CMRR - unsuitable for noisy PV string sensing without added signal conditioning. | Choose only if single-ended sources dominate and higher throughput (>250 kSPS) is required with relaxed noise immunity. |
| ADS131M04IPBSR | 24-bit, 64 kSPS, 4-channel, differential inputs; 107 dB SNR; integrated PGA and reference; SPI interface. | Lower sampling rate but superior resolution and built-in signal chain - better for low-bandwidth, high-precision sensor arrays. | Select when multi-channel synchronized acquisition and >100 dB dynamic range are prioritized over raw speed in solar monitoring nodes. |
Compared with ADS8860IDRCT and ADS131M04IPBSR, the SM73201IMM/NOPB uniquely balances 250 kSPS speed, true differential input, 85 dB CMRR, and ultra-low-power track mode - making it the only option optimized for real-time arc detection in cost-constrained, space-limited PV string monitors.
Availability
SM73201IMM/NOPB is available at Aetrix Electronics and suitable for PV DC arc detection systems, solar string data acquisition units, and industrial I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SM73201IMM/NOPB 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 renewable energy solutions.
The SM73201IMM/NOPB belongs to TI's high-performance SAR ADC product line, engineered specifically for demanding industrial and solar energy applications where accuracy, noise immunity, and low-power operation are critical.
FAQ
What is the maximum sampling rate supported by the SM73201IMM/NOPB?
The SM73201IMM/NOPB supports a maximum sampling rate of 250 kSPS under specified conditions (VA = 5 V, VREF = 4.5–5.5 V, fSCLK = 5 MHz). At this rate, it consumes 5.8 mW and maintains 93.2 dB SNR and 108 dBc SFDR. Sampling rates down to 50 kSPS are also fully specified with guaranteed performance across the operating temperature range.
Does the SM73201IMM/NOPB require an external reference voltage?
Yes, the SM73201IMM/NOPB requires an external reference voltage applied to the VREF pin. It accepts VREF from +0.5 V up to VA (4.5–5.5 V), allowing flexible input range configuration. The reference must be low-noise and stable - TI recommends using the REF5025 or REF5050 for optimal 16-bit performance.
Can the SM73201IMM/NOPB operate with different analog and digital supply voltages?
Yes, the SM73201IMM/NOPB supports independent analog (VA = 4.5–5.5 V) and digital I/O (VIO = 2.7–5.5 V) supplies. This allows the analog core to run at 5 V for best SNR while interfacing directly with 3.3 V microcontrollers - eliminating level-shifters and reducing system power and complexity.
What is Zero-Power Track Mode (ZPTM) and how does it benefit system design?
ZPTM is a low-power state where the SM73201IMM/NOPB consumes ≤15 µW while continuously tracking the analog input voltage. It activates automatically when CS is high or held low after conversion. This eliminates wake-up latency and preserves signal fidelity - ideal for intermittent sampling in battery-powered solar monitors where power budget and responsiveness are both critical.
Is the SM73201IMM/NOPB compatible with standard SPI interfaces?
Yes, the SM73201IMM/NOPB uses a standard 3-wire SPI-compatible interface (CS, SCLK, DOUT) with MSB-first 2's complement output. It operates with clock frequencies from 1 MHz to 5 MHz and supports short-cycling (early CS deassertion) for partial-word reads - enabling seamless integration with TI C2000, STMicroelectronics, and NXP microcontrollers.
SM73201IMM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
SM73201IMM/NOPB FAQ
1.How can I place an order for SM73201IMM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM73201IMM/NOPB 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 SM73201IMM/NOPB reliable?
The price and inventory of SM73201IMM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM73201IMM/NOPB is usually 5 days.
3.What payment methods are accepted for SM73201IMM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM73201IMM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM73201IMM/NOPB?
SM73201IMM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM73201IMM/NOPB 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 SM73201IMM/NOPB?
For technical support, including SM73201IMM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM73201IMM/NOPB requirements.
6.How does Aetrix verify that SM73201IMM/NOPB is sourced from the original manufacturer or authorized distributors?
All SM73201IMM/NOPB 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 SM73201IMM/NOPB meets industry standards.
7.What is the process for return or replacement of SM73201IMM/NOPB?
All SM73201IMM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM73201IMM/NOPB, 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 SM73201IMM/NOPB part is unused and in its original packaging.
Return procedure for SM73201IMM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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