ADC12038CIWM Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments ADC12038CIWM is a 12-bit successive-approximation ADC with 8 analog input channels in a 28-pin SOIC package. Achieves up to 8.8 µs conversion time with 0.024% linearity error and 5.5 V input range. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- ADC12038CIWM Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ADC12038CIWM?
- 12-bit resolution successive-approximation ADC with 8 multiplexed analog input channels for multi-sensor acquisition
- Maximum 8.8 µs conversion time enabling sampling rates suitable for industrial process control and data logging
- 0.024% maximum linearity error (equivalent to less than 1 LSB at 12-bit) for high-accuracy measurement
- Wide analog input range from -0.05 V to 5.55 V accepting direct sensor outputs referenced to ground
What is ADC12038CIWM used for?
The ADC12038CIWM is well-suited for multi-channel data acquisition systems in industrial process control, environmental monitoring stations, and programmable logic controllers that must digitise up to 8 analog sensors simultaneously from a single SPI-compatible converter. Its 12-bit resolution and sub-10 µs conversion time make it appropriate for temperature, pressure, flow, and level transmitters where measurement latency below 100 µs per channel is required. The device is also used in medical monitoring equipment, battery management systems, and power quality analysers that sample multiple voltage and current channels at moderate speed with high linearity.
What are the specifications of ADC12038CIWM?
| Number of Analog In Channels | 8 |
| YTEOL | 0 |
| Analog Input Voltage-Max | 5.55V |
| Analog Input Voltage-Min | -0.05 V |
| Conversion Time-Max | 8.8 µs |
| Converter Type | ADC, SUCCESSIVE APPROXIMATION |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e0 |
| Linearity Error-Max (EL) | 0.0244% |
| Number of Bits | 12 |
| Number of Functions | 1 |
| Output Bit Code | 2S COMPLEMENT BINARY |
| Output Format | SERIAL |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP28,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Sample and Hold / Track and Hold | SAMPLE |
| Screening Level | TS 16949 |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.39.00.30 |
Where can I find the ADC12038CIWM datasheet?
ADC12038CIWM Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for ADC12038CIWM?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many analog input channels does ADC12038CIWM support, and how are they selected during a conversion?
The ADC12038CIWM integrates an 8-channel analog multiplexer controlled via a 4-bit channel-select field embedded in the SPI command word. Each channel can be configured as single-ended (0 V to 5.5 V) or pseudo-differential relative to an internal common, allowing up to 8 independent sensor inputs to share a single 12-bit conversion core. Channel switching requires no external multiplexer ICs, reducing BOM cost in systems monitoring temperature, pressure, and flow simultaneously.
What is the conversion time of ADC12038CIWM, and how many samples per second can it achieve in continuous scanning mode?
The ADC12038CIWM completes a single 12-bit conversion in a maximum of 8.8 µs, which at its 2 MHz maximum SPI clock corresponds to approximately 114,000 conversions per second for a single channel. When scanning all 8 channels in a round-robin loop, the effective per-channel sample rate is approximately 14,000 samples per second, sufficient for industrial process variables such as temperature and 4–20 mA current-loop signals that change at frequencies below 1 kHz.
What linearity error does ADC12038CIWM guarantee, and how does it compare to the 12-bit ideal converter?
Texas Instruments specifies a maximum integral linearity error of 0.0244% for the ADC12038CIWM, which translates to approximately 1 LSB at 12-bit resolution (where 1 LSB equals 0.024% of full scale). This means the actual transfer function deviates by no more than one code step from the ideal staircase, making the ADC suitable for precision industrial measurement where absolute accuracy requirements are in the 0.05% to 0.1% range without post-calibration.
Which interface does ADC12038CIWM use to communicate with a microcontroller, and is it compatible with 3.3 V SPI buses?
The ADC12038CIWM uses a serial SPI-compatible interface with CS, CLK, DIN, and DOUT signals, supporting clock frequencies up to 2 MHz. The device operates from a 4.5 V to 5.5 V supply, and its digital I/O levels are compatible with 5 V logic. When interfacing with a 3.3 V microcontroller, a 74HC logic-level translator or a resistor-divider on the CLK and DIN lines is needed because the ADC's input high threshold is typically 2 V (40% of VDD), which 3.3 V logic satisfies if VDD is 5 V.
In a battery management system measuring 8 cell voltages, why would ADC12038CIWM be chosen over a simpler 8-bit ADC?
A 12-bit ADC provides 4096 discrete levels versus 256 for an 8-bit device, translating to 12× finer voltage resolution over the same input range. For a 4.2 V lithium-cell measurement with a 5 V reference, the ADC12038CIWM resolves voltage steps of approximately 1.2 mV per code, which is sufficient to estimate state-of-charge with ±1% accuracy. An 8-bit device would give only 19.5 mV per code, introducing state-of-charge errors up to ±5%—unacceptable for a battery management system that must protect cells from over-discharge.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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