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Texas Instruments ADC10738CIWM/NOPB
- Part No.:
- ADC10738CIWM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADC10738CIWM/NOPB.pdf
- Description:
- IC ADC 10BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
ADC10738CIWM/NOPB from Texas Instruments is a 10-bit plus sign serial-output successive approximation ADC with integrated 8-channel analog multiplexer, sample/hold circuitry, and internal 2.5 V ±2% band-gap reference. It operates from a single 5 V supply, achieves 74 kHz sampling rate and 5 μs max conversion time, and supports MICROWIRE-compatible serial I/O for microcontroller interfacing in portable instrumentation.
For engineers reviewing the ADC10738CIWM/NOPB datasheet, ADC10738CIWM/NOPB pinout, ADC10738CIWM/NOPB application, or ADC10738CIWM/NOPB equivalent, key selection criteria include its 8-channel differential/single-ended MUX configuration, ratiometric or absolute referencing capability, software/hardware power-down mode (18 μW), no missing codes over −40°C to +85°C, and TTL/CMOS I/O compatibility.
Technical Context
The ADC10738CIWM/NOPB implements a capacitive-array DAC with resistive ladder structure enabling both multiplexing and sample/hold functions in one architecture. Its successive approximation register (SAR) controls charge redistribution across a 32C capacitor array, with comparator zeroing during acquisition (tA = 2 μs max) followed by voltage-driven bit decisions.
Serial interface timing is synchronized to CLK (5 kHz–3 MHz), where rising edges load MUX address bits (MA0–MA4) from DI, and falling edges shift out 11-bit data (DB0–SIGN) on DO. CS enables tri-state control of DO/SARS, while PD asserts hardware power-down independent of CS state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits plus sign - delivers signed 11-bit output format supporting differential inputs where negative channel may exceed positive channel |
| Sampling Rate | 74 kHz max - enables real-time capture of audio-band and sensor signals without external oversampling |
| Conversion Time | 5 μs max - deterministic latency suitable for closed-loop control with microsecond-level timing budgets |
| Reference Voltage | 2.5 V ±2% internal band-gap - eliminates need for external reference in cost-sensitive designs; supports ratiometric or absolute modes |
| Power Consumption | 37 mW max active / 18 μW in power-down - enables battery operation in portable medical and test equipment |
| Analog Input Range | 0 V to AV+ (4.5–5.5 V) - accommodates full-scale unipolar signals without level-shifting circuitry |
| Operating Temperature | −40°C to +85°C - qualified for industrial and remote instrumentation environments |
Pinout & Package
ADC10738CIWM/NOPB uses a 24-pin SOIC package (package code DW0024B, thermal resistance 75°C/W), with separate AGND/DGND and AV+/DV+ pins requiring individual bypassing per datasheet layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | 8 configurable MUX inputs; selectable in single-ended or differential mode via MA0–MA4 address bits |
| COM | Pseudo-ground reference | Used as common-mode reference point in single-ended mode; improves noise rejection when tied to system AGND |
| VREF+, VREF− | Reference voltage terminals | Accept 0.5–5.0 V reference span; internal 2.5 V reference connects between these pins when enabled |
| AV+, DV+ | Analog/digital supply | Must be tied to same 4.5–5.5 V rail but bypassed separately to minimize digital switching noise coupling into analog path |
| AGND, DGND | Analog/digital ground | Separate ground pins require star-point connection to avoid ground loops and preserve DC accuracy |
| CLK, DI, DO, CS | MICROWIRE serial interface | Asynchronous 3-wire interface; DO and SARS are tri-stated when CS is high, enabling bus sharing |
| PD | Hardware power-down control | Logic-high assertion disables internal reference and SAR clock, reducing current to 18 μW with clock off |
| SARS | SAR status indicator | Active-high open-drain output signaling conversion-in-progress; useful for interrupt-driven firmware synchronization |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes over temperature | Guaranteed monotonicity across −40°C to +85°C ensures reliable threshold detection in safety-critical sensor systems |
| Software/hardware power-down | Two independent power-down methods: PD pin (hardware) or serial command (software), enabling flexible low-power sequencing |
| Ratiometric or absolute referencing | Supports either supply-referenced measurements (e.g., resistive bridge sensors) or precision absolute measurements (e.g., thermocouple cold-junction compensation) |
| Single-supply 5 V operation | Eliminates need for dual supplies or level translators, simplifying PCB design and reducing BOM count in embedded systems |
| Integrated sample/hold | Capacitor-based S/H function captures input during tA = 2 μs acquisition window, allowing input signal drift during conversion cycle |
Applications
| Portable ECG Monitor | Industrial Sensor Data Logger |
|---|---|
Use Scenario: Continuous acquisition of low-amplitude biopotential signals from dry electrodes under motion artifact conditions. IC Role / Device Role / Timing Role: ADC10738CIWM/NOPB performs synchronized 8-channel sampling of electrode pairs, using differential mode to reject common-mode interference while maintaining signed output for polarity-sensitive waveform analysis. Use Value: 10-bit plus sign resolution preserves baseline wander and T-wave inversion detection; 74 kHz sampling supports Nyquist-compliant 30 kHz bandwidth for high-fidelity cardiac morphology. |
Use Scenario: Battery-powered remote monitoring of temperature, pressure, and humidity sensors across distributed industrial nodes. IC Role / Device Role / Timing Role: ADC10738CIWM/NOPB serves as central analog front-end, scanning multiple RTD/thermistor bridges and transducer outputs via its 8-channel MUX, with ratiometric mode eliminating supply-voltage drift errors. Use Value: 18 μW power-down current extends battery life to >5 years in sleep-wake cycles; internal 2.5 V reference removes need for external precision reference IC. |
| Automated Test Equipment (ATE) Channel Card | Field-Deployable Environmental Station |
Use Scenario: Modular ATE slot card requiring fast, deterministic ADC response for stimulus-response validation of DUTs. IC Role / Device Role / Timing Role: ADC10738CIWM/NOPB provides sub-5 μs conversion latency with CS-controlled data readout, enabling tight timing correlation between digital stimulus and analog measurement. Use Value: MICROWIRE-compatible serial interface allows direct connection to FPGA-based controller without glue logic; no zero/full-scale adjustment reduces calibration overhead. |
Use Scenario: Solar-powered weather station measuring wind speed (anemometer), solar irradiance (photodiode), and barometric pressure (MEMS sensor). IC Role / Device Role / Timing Role: ADC10738CIWM/NOPB interfaces diverse sensor outputs-unipolar (irradiance), bipolar (pressure differential), and ratiometric (anemometer bridge)-using programmable MUX addressing and reference modes. Use Value: Single 5 V supply simplifies power architecture; −40°C to +85°C rating ensures reliability in uncontrolled outdoor enclosures; no missing codes prevents false alarm triggers in safety thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference, 200 kSPS max | Lacks sign bit and internal reference; requires external ref and level-shifting for 5 V systems | Select when higher speed and lower resolution suffice, and board space permits external reference |
| TLV2548IPW | 12-bit resolution, SPI interface, internal 2.5 V ref, 200 kSPS max, 20-pin TSSOP | Higher resolution and speed but larger code size; different pinout and serial protocol framing | Choose for improved ENOB (11.2 bits) and faster throughput where firmware can accommodate SPI command set |
Compared with ADS7822U and TLV2548IPW, ADC10738CIWM/NOPB uniquely combines 10-bit-plus-sign resolution, integrated MUX, sample/hold, and MICROWIRE compatibility in a 24-pin SOIC - making it optimal for legacy microcontroller systems requiring signed differential measurements without external support components.
Availability
ADC10738CIWM/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial data loggers, and automated test equipment requiring stable component supply and long-lifecycle support.
Supply support for ADC10738CIWM/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 company specializing in analog and embedded processing technologies, with leadership in data converters, power management, and interface solutions.
ADC10738CIWM/NOPB belongs to TI's legacy precision SAR ADC family designed for cost-sensitive, low-power embedded systems requiring integrated MUX, reference, and serial interface - targeting medical, test, and industrial sensing applications.
FAQ
What is the maximum clock frequency supported by ADC10738CIWM/NOPB?
ADC10738CIWM/NOPB supports a clock frequency range of 5 kHz to 3 MHz. At 3 MHz, the device achieves its maximum 74 kHz sampling rate and 5 μs conversion time. Operation below 5 kHz is not guaranteed per datasheet specifications, and timing margins degrade outside this range.
Does ADC10738CIWM/NOPB require external zero or full-scale calibration?
No, ADC10738CIWM/NOPB requires no zero or full-scale adjustment. Its factory-trimmed architecture ensures total unadjusted error ≤±2.0 LSB over temperature, with offset error ≤±1.5 LSB and full-scale error ≤±1.5 LSB - enabling plug-and-play integration in production systems.
How does the differential mode of ADC10738CIWM/NOPB handle inverted input polarity?
In differential mode, ADC10738CIWM/NOPB produces valid signed 11-bit output even when the negative input exceeds the positive input. This is enabled by its 10-bit plus sign data format, which preserves polarity information and avoids overflow clipping during transient inversions - critical for AC-coupled sensor signals.
Can ADC10738CIWM/NOPB operate with an external reference voltage?
Yes, ADC10738CIWM/NOPB supports external reference voltages from 0.5 V to 5.0 V applied between VREF+ and VREF−. When an external reference is used, the internal 2.5 V band-gap reference is disabled, and the device operates in absolute or ratiometric mode depending on how VREF− is connected.
What is the purpose of the SARS pin on ADC10738CIWM/NOPB?
The SARS (Successive Approximation Register Status) pin on ADC10738CIWM/NOPB is an open-drain output that goes active-high during conversion and returns low afterward. It provides hardware visibility into conversion progress, enabling interrupt-driven firmware or external logic to synchronize data reads without polling DO or CS timing.
ADC10738CIWM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 74k
- Number of Inputs:
- 8
- Input Type:
- Differential, Pseudo-Differential, 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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC10738CIWM/NOPB FAQ
1.How can I place an order for ADC10738CIWM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC10738CIWM/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 ADC10738CIWM/NOPB reliable?
The price and inventory of ADC10738CIWM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC10738CIWM/NOPB is usually 5 days.
3.What payment methods are accepted for ADC10738CIWM/NOPB?
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4.How is shipping managed for ADC10738CIWM/NOPB?
ADC10738CIWM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC10738CIWM/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 ADC10738CIWM/NOPB?
For technical support, including ADC10738CIWM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC10738CIWM/NOPB requirements.
6.How does Aetrix verify that ADC10738CIWM/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC10738CIWM/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 ADC10738CIWM/NOPB meets industry standards.
7.What is the process for return or replacement of ADC10738CIWM/NOPB?
All ADC10738CIWM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC10738CIWM/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 ADC10738CIWM/NOPB part is unused and in its original packaging.
Return procedure for ADC10738CIWM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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