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Texas Instruments ADC128S102CIMT
- Part No.:
- ADC128S102CIMT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADC128S102CIMT.pdf
- Description:
- IC ADC 12BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,496
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Product details
Overview
ADC128S102 from Texas Instruments is a low-power, 8-channel, 12-bit successive-approximation register (SAR) ADC with 500 ksps to 1 MSPS throughput, independent analog (VA) and digital (VD) supplies (2.7 V to 5.25 V), SPI/QSPI/MICROWIRE-compatible serial interface, and operation over −40°C to +105°C. It serves as a precision analog front-end digitizer in embedded sensor acquisition systems.
For engineers reviewing the ADC128S102 datasheet, ADC128S102 pinout, ADC128S102 application, or ADC128S102 equivalent, key selection considerations include its 12-bit resolution with ±1.2 LSB max INL at 5 V, 3–5 V dual-supply flexibility, 16-pin TSSOP package, and integrated track-and-hold for multi-channel sampling without external circuitry.
Technical Context
The ADC128S102 implements a charge-redistribution DAC-based SAR architecture with a dedicated 3-cycle track phase followed by a 13-cycle hold-and-convert phase per sample, synchronized to an 8–16 MHz SCLK. Its input multiplexer selects among eight single-ended analog inputs (IN0–IN7), referenced to VA, which also serves as the internal voltage reference.
Digital I/O operates on VD (2.7 V to VA), while analog inputs accept 0 V to VA signals; DOUT output level is VD-referenced, and DIN/CS/SCLK tolerate 0 V to VA logic levels independent of VD. Power-down is achieved by pulling CS high, reducing consumption to 0.06 µW at 3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit straight binary output; LSB = VA / 4096 defines quantization step size for full-scale range. |
| Sample Rate | 500 ksps to 1 MSPS continuous; determined by SCLK frequency (8–16 MHz) and fixed 16-cycle conversion frame. |
| INL (max) | ±1.2 LSB at VA = VD = 5.0 V; ensures monotonicity and ≤0.03% full-scale linearity error in precision measurement. |
| Power (typ) | 2.3 mW at 3 V / 1 MSPS; enables battery-powered portable instrumentation with minimal thermal load. |
| Supply Range | VA: 2.7 V–5.25 V; VD: 2.7 V–VA; allows flexible rail partitioning-e.g., 3.3 V analog + 1.8 V digital via LDO. |
| Operating Temp | −40°C to +105°C; qualified for under-hood automotive, industrial control, and medical equipment environments. |
| SPI Compatibility | 4-wire interface (CS, SCLK, DIN, DOUT); MSB-first, 16-cycle frame, no dummy cycles required after power-up. |
Pinout & Package
ADC128S102 is housed in a 16-lead TSSOP package (5.00 mm × 4.40 mm body), optimized for compact PCB layout and thermal performance (θJA = 110°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Active-low chip select input | Initiates conversion sequence on falling edge; high state places device in 0.06 µW shutdown mode. |
| SCLK | Serial clock input | 8–16 MHz master clock controlling both conversion timing and serial data transfer; 40%–60% duty cycle required. |
| DIN | Serial data input | Loads 3-bit channel address (ADD2–ADD0) during first 8 SCLK rising edges of each frame. |
| DOUT | Serial data output | Outputs 12-bit result MSB-first on SCLK falling edges 5–16; high-impedance when CS is high. |
| VA | Analog supply & reference | +2.7 V to +5.25 V analog rail; also sets full-scale input range (0 V to VA) and reference voltage. |
| VD | Digital supply | +2.7 V to VA digital rail; powers logic and defines DOUT high-level (VD − 0.5 V min) and low-level (0.4 V max). |
| AGND / DGND | Analog/digital ground returns | Separate ground pins minimize noise coupling; require star grounding or split-plane design with single-point connection. |
| IN0–IN7 | Analog input channels | Single-ended inputs accepting 0 V to VA; multiplexed internally; 30 pF sampling capacitance requires low-Z drive (<100 Ω). |
Key Features
| Feature | Design Value |
|---|---|
| Independent VA/VD supplies | Enables mixed-signal system partitioning-e.g., 3.3 V analog sensing with 1.8 V FPGA interface-reducing noise and simplifying power design. |
| Integrated track-and-hold | Eliminates need for external THA; 3-cycle acquisition time ensures accurate sampling of dynamic signals up to 11 MHz full-power bandwidth. |
| Low-power shutdown mode | 0.06 µW (3 V) / 0.25 µW (5 V) quiescent consumption enables energy harvesting or ultra-long-life battery operation. |
| Industrial temperature range | −40°C to +105°C operation verified across electrical specs; supports deployment in engine control units, motor drives, and field instruments. |
| Straight-binary SPI output | Native 12-bit format with no offset or twos-complement conversion needed; simplifies firmware parsing and reduces CPU overhead. |
Applications
| Automotive Navigation Sensors | Portable Medical Monitoring |
|---|---|
|
Use Scenario: Digitizing analog outputs from MEMS gyros, accelerometers, and pressure sensors in ADAS modules. IC Role / Device Role / Timing Role: 8-channel SAR ADC performing synchronized sampling of inertial and environmental sensors at 500 ksps. Use Value: Dual-supply isolation (VA/VD) suppresses digital switching noise from MCU/FPGA, preserving 73 dB SINAD for reliable heading calculation. |
Use Scenario: Acquiring ECG, SpO₂, and temperature signals in handheld patient monitors. IC Role / Device Role / Timing Role: Low-power 12-bit digitizer interfacing with ultra-low-noise op-amps and microcontroller SPI peripherals. Use Value: 2.3 mW typical power at 3 V extends battery life beyond 72 hours; shutdown mode enables wake-on-event sensing. |
| Industrial Process Control | Test & Measurement Equipment |
|
Use Scenario: Reading 4–20 mA loop transmitters, thermocouples, and RTDs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision front-end ADC with programmable channel sequencing and robust ESD protection (±2.5 kV HBM). Use Value: ±1.2 LSB INL ensures <0.03% reading accuracy across 0–100°C ambient; AGND/DGND separation maintains signal integrity in noisy factory floors. |
Use Scenario: Capturing transient waveforms in portable oscilloscopes and data loggers. IC Role / Device Role / Timing Role: High-throughput 12-bit converter supporting 1 MSPS continuous sampling with deterministic 16-cycle latency. Use Value: 11.8-bit ENOB at 40 kHz enables >70 dB dynamic range for harmonic analysis; 13 ns aperture delay minimizes time-skew errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, 1 MSPS, but requires external reference and has higher 11.5 mW power at 3 V. | Supports more inputs but lacks integrated VA-referenced operation; better for systems needing flexible reference sourcing. | Select ADS7953IRHBT when expanding beyond 8 channels or requiring external reference control; ADC128S102 is preferred for simpler, lower-power, reference-integrated designs. |
| MAX11100ETE+ | 12-bit, 8-channel, 1 MSPS, but only −40°C to +85°C temp range and no independent VD supply (VD = VA). | Suitable for commercial-grade portable devices; not rated for extended industrial or automotive ambient conditions. | Choose MAX11100ETE+ for cost-sensitive consumer applications within 85°C limit; ADC128S102 remains optimal for −40°C to +105°C reliability-critical use. |
Compared with ADS7953IRHBT and MAX11100ETE+, the ADC128S102 uniquely combines extended temperature rating, true dual-supply independence, and integrated reference-all in a 16-pin TSSOP-making it the most balanced choice for ruggedized, low-power, 8-channel industrial and automotive data acquisition.
Availability
ADC128S102 is available at Aetrix Electronics and suitable for automotive navigation, portable medical monitoring, industrial process control, test equipment, and instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADC128S102 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 ADC128S102 belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, multi-channel analog sensing in harsh environments-from automotive ECUs to portable diagnostics equipment.
FAQ
What is the maximum clock frequency supported by ADC128S102?
The ADC128S102 supports a maximum SCLK frequency of 16 MHz, as specified in its absolute maximum ratings and timing characteristics. Operating above this frequency risks violating setup/hold times and may cause incorrect conversion results or communication failure. The minimum clock frequency is 8 MHz; using lower frequencies invalidates guaranteed AC performance specs like SINAD and ENOB.
Does ADC128S102 require an external reference voltage?
No, the ADC128S102 does not require an external reference. Its VA supply pin serves as both the analog power rail and the internal reference voltage, establishing a full-scale input range of 0 V to VA. This eliminates the need for external reference components, simplifying BOM and layout-especially beneficial in space-constrained portable systems.
How many analog input channels does ADC128S102 support, and how are they selected?
The ADC128S102 supports eight single-ended analog input channels (IN0 through IN7). Channel selection is controlled via a 3-bit address (ADD2–ADD0) loaded into the internal control register through the DIN pin during the first 8 SCLK rising edges after CS falls. The mapping is defined in the datasheet: e.g., '000' selects IN0, '111' selects IN7.
What is the power consumption of ADC128S102 in shutdown mode?
In shutdown mode (CS = high), the ADC128S102 consumes only 0.06 µW typical at 3 V and 0.25 µW typical at 5 V. This ultra-low quiescent power enables energy-efficient wake-on-event architectures in battery-powered applications such as wearable health monitors or remote sensor nodes.
Is ADC128S102 compatible with standard SPI interfaces?
Yes, the ADC128S102 is fully compatible with standard 4-wire SPI protocols-including QSPI, MICROWIRE, and common DSP serial interfaces. It uses CS as frame sync, SCLK for timing, DIN for address loading, and DOUT for 12-bit MSB-first data output in a deterministic 16-cycle frame, requiring no special initialization or dummy cycles.
ADC128S102CIMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC128S102CIMT FAQ
1.How can I place an order for ADC128S102CIMT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC128S102CIMT 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 ADC128S102CIMT reliable?
The price and inventory of ADC128S102CIMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC128S102CIMT is usually 5 days.
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ADC128S102CIMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC128S102CIMT 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 ADC128S102CIMT?
For technical support, including ADC128S102CIMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC128S102CIMT requirements.
6.How does Aetrix verify that ADC128S102CIMT is sourced from the original manufacturer or authorized distributors?
All ADC128S102CIMT 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 ADC128S102CIMT meets industry standards.
7.What is the process for return or replacement of ADC128S102CIMT?
All ADC128S102CIMT units undergo pre-shipment inspection (PSI). If there is an issue with ADC128S102CIMT, 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 ADC128S102CIMT part is unused and in its original packaging.
Return procedure for ADC128S102CIMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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