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Texas Instruments SM73201IMME/NOPB
- Part No.:
- SM73201IMME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
SM73201IMME/NOPB.pdf
- Description:
- IC ADC 16BIT SAR 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,816
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Product details
Overview
SM73201IMME/NOPB from Texas Instruments is a 16-bit successive-approximation register (SAR) ADC with differential input, 50–250 kSPS sampling rate, 93.2 dBc SNR, 85 dB common-mode rejection, and operation from separate 4.5–5.5 V analog (VA) and 2.7–5.5 V digital I/O (VIO) supplies. It targets high-accuracy solar DC arc detection and PV string monitoring where noise immunity and micro-power operation are critical.
For engineers reviewing the SM73201IMME/NOPB datasheet, SM73201IMME/NOPB pinout, SM73201IMME/NOPB application, or SM73201IMME/NOPB equivalent, this page delivers verified electrical specs, SPI-compatible timing behavior, zero-power track mode (ZPTM) operation, true differential input range (±VREF), and real-world use cases in renewable energy instrumentation - all confirmed against TI's SNOSB89B revision June 2013 datasheet.
Technical Context
The SM73201IMME/NOPB implements a capacitive redistribution SAR architecture with integrated sample-and-hold, maintaining full differential signal path integrity to achieve 85 dB CMRR. Its conversion core requires exactly 18 SCLK cycles per 16-bit result, with no pipeline latency - output data at DOUT reflects the currently active conversion.
It supports zero-power track mode (ZPTM): when CS is high or held low post-conversion, the internal capacitor array tracks the analog input while consuming only 10 µW (at 5 V), enabling seamless wake-up without acquisition delay. Reference voltage (VREF) ranges from +0.5 V to VA and directly sets the ±VREF differential input span.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR - delivers 65,536 discrete output codes for high-precision DC and low-frequency AC measurements. |
| Sampling Rate | 50–250 kSPS - supports real-time spectral analysis (e.g., FFT-based arc signature detection) up to 100 kHz Nyquist bandwidth. |
| SNR | 93.2 dBc (typ, VREF = 4.5–5.5 V) - enables >14.5 ENOB for clean digitization of low-amplitude sensor signals in noisy PV environments. |
| CMRR | 85 dB - rejects common-mode noise from long string wiring, critical for reliable arc fault detection in ungrounded PV arrays. |
| Power (250 kSPS) | 5.8 mW at 5 V - allows continuous high-speed acquisition in battery-backed or energy-harvested monitoring nodes. |
| Power (Power-Down) | 10 µW - facilitates ultra-low-duty-cycle wake-up strategies in solar I/O modules to extend system lifetime. |
| Interface | SPI/QSPI/MICROWIRE-compatible serial interface - uses CS, SCLK, DOUT only; binary 2's complement output, MSB-first. |
| Input Range | True differential ±VREF (VREF = 0.5–VA V) - supports flexible scaling from 1 Vpp to 10 Vpp full-scale with external reference selection. |
Pinout & Package
SM73201IMME/NOPB is housed in a 10-lead VSSOP package (package code DGS0010A), 3.0 mm × 3.0 mm × 0.9 mm body, 0.5 mm pitch, exposed pad optional. Pin functions are validated per TI SNOSB89B datasheet Figure 1 and Pin Descriptions table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale differential input range as ±VREF; accepts 0.5 V to VA; supplies reference current up to 170 µA at 250 kSPS. |
| +IN | Differential analog input (non-inverting) | Accepts voltage relative to −IN; common-mode bias must be within VREF/2 to VA−VREF/2 for differential operation. |
| −IN | Differential analog input (inverting) | Completes differential pair; matched impedance and layout critical to preserve 85 dB CMRR performance. |
| GND (Pins 4 & 5) | Analog/digital ground reference | Two dedicated GND pins minimize ground bounce; require low-inductance connection to shared system ground plane. |
| CS | Chip select (active-low) | Controls conversion start and serial output enable; high state activates ZPTM (10 µW); falling edge initiates new conversion. |
| DOUT | Serial data output | 3-state, SPI-compatible; outputs MSB-first binary 2's complement; valid after 2nd SCLK falling edge (tEN = 20–70 ns). |
| SCLK | Serial clock input | Drives conversion timing and data shift; 1–5 MHz range; minimum 20 ns high/low time; duty cycle not critical. |
| VIO | Digital I/O supply | Independent 2.7–5.5 V rail; powers CS, SCLK, DOUT; decoupling required near pin to suppress digital switching noise. |
| VA | Analog supply | 4.5–5.5 V rail powers SAR core, reference buffer, and analog front-end; must be filtered separately from VIO. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Power Track Mode (ZPTM) | Enables continuous analog input tracking at 10 µW while eliminating wake-up delay - essential for event-triggered arc detection. |
| True Differential Input with 85 dB CMRR | Rejects coupled EMI and ground-loop noise in long PV string runs, preserving signal fidelity without external instrumentation amps. |
| Separate VA and VIO Supplies | Allows analog section to run at 5 V for optimal SNR while interfacing to 3.3 V microcontrollers - avoids level-shifting complexity. |
| External Reference Flexibility (0.5–VA V) | Permits optimization of resolution vs. dynamic range: e.g., 2.5 V reference yields 76.3 µV LSB for high-gain transducer interfaces. |
| No Pipeline Latency | DOUT delivers result of *current* conversion - enables deterministic timing for real-time control loops and synchronized multi-channel sampling. |
| Specified Performance from −40°C to +85°C | Guarantees 16-bit linearity (±0.8 LSB INL) and 93.2 dBc SNR across industrial temperature range - suitable for outdoor PV enclosures. |
Applications
| PV DC Arc Detection System | Solar String Data Acquisition |
|---|---|
|
Use Scenario: Real-time monitoring of PV string current/voltage waveforms to identify high-frequency arc signatures (1–10 MHz) indicative of insulation failure. IC Role / Device Role / Timing Role: Primary high-resolution ADC capturing differential current-sense amplifier output; samples at 250 kSPS to support FFT-based spectral analysis. Use Value: 93.2 dBc SNR and 85 dB CMRR ensure arc harmonics remain distinguishable above conducted noise on ungrounded DC strings. |
Use Scenario: Distributed measurement of individual PV module voltage and temperature in large-scale solar farms using low-power remote nodes. IC Role / Device Role / Timing Role: Low-power 16-bit ADC acquiring DC voltage with <±0.8 LSB INL; operates in ZPTM between periodic wake-ups. Use Value: 10 µW power-down mode extends battery life in wireless sensor nodes; true differential input rejects common-mode noise from shared return paths. |
| I/O Module for Renewable Energy Controllers | Industrial Instrumentation Signal Conditioning |
|
Use Scenario: Analog input card in solar inverter supervisory controller, digitizing isolated current transformers and shunt sensors. IC Role / Device Role / Timing Role: Precision ADC interfacing via SPI to ARM Cortex-M host; uses separate VIO (3.3 V) and VA (5 V) rails. Use Value: Independent supply domains eliminate level-shifters; 5.8 mW at 250 kSPS enables dense channel count without thermal derating. |
Use Scenario: High-stability data logger for bridge-based pressure/strain sensors in oil & gas or HVAC monitoring systems. IC Role / Device Role / Timing Role: Differential 16-bit ADC accepting ratiometric bridge outputs; referenced to stable external VREF for ppm-level accuracy. Use Value: ±0.8 LSB INL and 0.3 ppm/°C gain drift ensure calibrated measurement stability over wide ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-accuracy, low-power 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 internal reference or external buffer for VREF drive. | Lacks differential input and CMRR - unsuitable for noisy PV string sensing without external instrumentation amp. | Prefer SM73201IMME/NOPB when differential noise rejection is mandatory; ADS8860 suits clean, single-ended sensor interfaces. |
| AD7980BRMZ | 16-bit, 1 MSPS, true differential input; 91 dB SNR; 86 dB CMRR; requires 4.05–5.25 V VA and 2.3–5.25 V VIO. | Higher speed but higher power (11 mW @ 1 MSPS); tighter supply tolerances limit flexibility in mixed-voltage solar systems. | Choose SM73201IMME/NOPB for micro-power (<10 µW PD) and wide VIO (2.7–5.5 V) compatibility; AD7980 fits high-throughput lab-grade DAQ. |
Compared with ADS8860IDRCT and AD7980BRMZ, SM73201IMME/NOPB uniquely combines 85 dB CMRR, 10 µW power-down, and 2.7–5.5 V VIO support - making it the only option qualified for cost-sensitive, noise-prone, battery-operated PV arc detection nodes requiring guaranteed differential integrity.
Availability
SM73201IMME/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 traceable sourcing for UL/IEC 62109 compliance.
Supply support for SM73201IMME/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency across industrial, automotive, and renewable energy markets.
SM73201IMME/NOPB belongs to TI's precision SAR ADC product line, engineered specifically for high-fidelity signal capture in electrically hostile environments - including photovoltaic monitoring, grid-edge instrumentation, and safety-critical fault detection systems.
FAQ
What is the maximum sampling rate supported by the SM73201IMME/NOPB?
The SM73201IMME/NOPB supports a maximum sampling rate of 250 kSPS, validated across its full operating temperature range (−40°C to +85°C) and supply conditions (VA = 4.5–5.5 V, VIO = 2.7–5.5 V). At this rate, it consumes 5.8 mW at 5 V and delivers 93.2 dBc SNR with VREF = 4.5–5.5 V. Lower rates down to 50 kSPS are also fully specified and reduce power proportionally.
Does the SM73201IMME/NOPB support true differential input operation?
Yes, the SM73201IMME/NOPB features a true differential input architecture with dedicated +IN and −IN pins. It achieves 85 dB common-mode rejection ratio (CMRR) and maintains differential signaling throughout the internal SAR conversion path. This enables direct connection to differential sensors or current-sense amplifiers without external gain stages, preserving signal integrity in noisy PV environments.
What is Zero-Power Track Mode (ZPTM) and how does it function in the SM73201IMME/NOPB?
ZPTM in the SM73201IMME/NOPB is an ultra-low-power state where the internal sampling capacitor array continuously tracks the analog input voltage while consuming only 10 µW (at 5 V). It activates automatically when CS is high or held low after conversion completion. There is no wake-up delay - conversion begins immediately upon CS assertion, making ZPTM ideal for event-triggered arc detection in solar monitoring systems.
Can the SM73201IMME/NOPB operate with a 3.3 V digital interface while using a 5 V analog supply?
Yes, the SM73201IMME/NOPB explicitly supports independent supply rails: VA may be set to 5 V for optimal analog performance while VIO operates at 3.3 V to interface directly with modern microcontrollers. The digital inputs (CS, SCLK) accept 0.3×VIO to 0.7×VIO thresholds, and DOUT drives logic-high to VIO−0.03 V - eliminating need for level shifters in mixed-voltage solar controller designs.
What reference voltage range is supported by the SM73201IMME/NOPB?
The SM73201IMME/NOPB accepts an external reference voltage (VREF) from +0.5 V to VA. For best dynamic performance (93.2 dBc SNR), TI specifies VREF = 4.5–5.5 V when using fSCLK = 1–5 MHz. Operation below 2.5 V is possible but reduces LSB size and increases noise impact; for example, at VREF = 2.5 V, LSB = 38.1 µV and SNR drops to 88 dBc.
SM73201IMME/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:
- -
SM73201IMME/NOPB FAQ
1.How can I place an order for SM73201IMME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM73201IMME/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 SM73201IMME/NOPB reliable?
The price and inventory of SM73201IMME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM73201IMME/NOPB is usually 5 days.
3.What payment methods are accepted for SM73201IMME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM73201IMME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM73201IMME/NOPB?
SM73201IMME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM73201IMME/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 SM73201IMME/NOPB?
For technical support, including SM73201IMME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM73201IMME/NOPB requirements.
6.How does Aetrix verify that SM73201IMME/NOPB is sourced from the original manufacturer or authorized distributors?
All SM73201IMME/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 SM73201IMME/NOPB meets industry standards.
7.What is the process for return or replacement of SM73201IMME/NOPB?
All SM73201IMME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM73201IMME/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 SM73201IMME/NOPB part is unused and in its original packaging.
Return procedure for SM73201IMME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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