Texas Instruments ADC101S101CISD/NOPB

Overview

ADC101S101CISD/NOPB from Texas Instruments is a single-channel, 10-bit successive-approximation ADC with SPI/QSPI/MICROWIRE-compatible serial interface, operating at 500 ksps to 1 Msps sample rates, 2.7V–5.25V supply, and integrated track-and-hold - used in portable instrumentation for high-fidelity analog signal digitization.

For engineers reviewing the ADC101S101CISD/NOPB datasheet, ADC101S101CISD/NOPB pinout, ADC101S101CISD/NOPB application, or ADC101S101CISD/NOPB equivalent, key selection criteria include guaranteed DNL (±0.7 LSB max), SNR (61.2 dB min), shutdown power (2.5 µW), SOT-23/WSON package compatibility, and industrial temperature range (−40°C to +85°C).

Technical Context

The ADC101S101CISD/NOPB implements a charge-redistribution DAC core with internal track-and-hold, enabling precise sampling at up to 1 Msps without external hold circuitry. Its conversion timing is fully synchronized to the falling edge of CS, with aperture jitter specified at 30 ps and acquisition time limited to 350 ns.

Serial communication uses a 16-cycle frame: three leading zeros, ten straight-binary data bits (MSB first), and two trailing zeros - compatible with standard SPI controllers without protocol translation. Power management is controlled solely via CS: low enables conversion and normal operation; high (before 10th SCLK falling edge) forces shutdown mode.

Key Specifications

Pinout & Package

ADC101S101CISD/NOPB is packaged in a 6-lead SOT-23 (DBV) or WSON (NGF) package with exposed thermal pad; both variants share identical pinout and are functionally interchangeable. The center pad (for CISD suffix) must be connected to GND for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADC101S051CIMF/NOPB, ADC101S101CISD/NOPB delivers 2× higher maximum throughput without sacrificing linearity or noise; versus ADC121S101CISD/NOPB, it trades 2-bit resolution for 20% lower active power and identical footprint - ideal for cost- and power-sensitive 10-bit applications.

Availability

ADC101S101CISD/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, remote data acquisition, and industrial control feedback requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADC101S101CISD/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 low-power signal chain solutions.

The ADC101S101CISD/NOPB belongs to TI's precision SAR ADC family designed for space- and power-constrained applications demanding guaranteed performance across variable sample rates and industrial temperature ranges.

FAQ

What is the maximum guaranteed sample rate for ADC101S101CISD/NOPB?

The ADC101S101CISD/NOPB is fully specified for operation up to 1 Msps across the industrial temperature range (−40°C to +85°C). This maximum rate is ensured with SCLK between 10 MHz and 20 MHz and proper timing margining per the tACQ and tQUIET requirements in the datasheet. At 1 Msps, the device consumes 10 mW typical at 5V supply.

Does ADC101S101CISD/NOPB require an external reference voltage?

No, ADC101S101CISD/NOPB uses its VA supply pin as the reference voltage - the full-scale range is 0 V to VA. This eliminates need for external references but requires clean, well-bypassed VA (1 µF + 0.1 µF capacitors within 1 cm) to maintain 62 dB SNR performance. Reference accuracy directly tracks VA regulation tolerance.

Is ADC101S101CISD/NOPB pin-compatible with other members of the ADC101Sxx1 family?

Yes, ADC101S101CISD/NOPB is fully pin- and function-compatible with ADC101S021 and ADC101S051 per Table 2 of the datasheet. All share identical 6-pin SOT-23/WSON footprints, pin assignments, serial interface timing, and power sequencing - enabling drop-in speed upgrades or downgrades without PCB revision.

What is the quiet time (tQUIET) requirement between conversions for ADC101S101CISD/NOPB?

The minimum quiet time tQUIET for ADC101S101CISD/NOPB is 50 ns, defined as the interval after SDATA returns to TRI-STATE (following the 16th SCLK falling edge or CS rising edge) before the next CS falling edge may occur. This ensures bus relinquish and internal state reset; violating tQUIET risks corrupted data or metastability.

How does power consumption scale with supply voltage in ADC101S101CISD/NOPB?

ADC101S101CISD/NOPB draws 2.0 mW typical at 3V and 10 mW typical at 5V in normal operation. Shutdown power is 2.5 µW at 5V and scales linearly - ~1.5 µW at 3V. Current draw is proportional to VA² due to internal CMOS switching, so reducing supply voltage significantly lowers dynamic power without degrading SNR or linearity.