Part A
ADC121S101CIMF
Texas Instruments
- Lifecycle
- Active
- Stock
- 3205 PCS
- Package
- SOT-23-6
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADC121S101CIMFX is a tape-and-reel packaged variant of the ADC121S101CIMF and is a compatible functional replacement candidate. Both parts share identical device specifications, including resolution, sampling rate, supply voltage range, and interface type, differing only in packaging format and order quantity. Designers can substitute one for the other without electrical or footprint changes, provided the reel packaging aligns with the assembly process.
Resolution
High match
Sampling Rate
High match
Supply Voltage Range
High match
Package Type
High match
Parts at a glance
Part B
ADC121S101CIMFX
Texas Instruments
- Lifecycle
- Active
- Stock
- 8967 PCS
- Package
- SOT-23-6
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADC121S101CIMF | ADC121S101CIMFX | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the number of discrete levels the ADC can represent; both parts offer identical conversion precision. |
| Number of Channels | 1 (Single-Ended) | 1 (Single-Ended) | Defines how many analog inputs can be sampled; identical single-channel architecture allows direct substitution. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum conversion throughput; matching rates ensure the same signal bandwidth can be captured. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Operating supply range must match for the part to function in the same circuit without rail changes. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP | SPI / QSPI / MICROWIRE / DSP | Digital communication protocol must be compatible with the host controller for drop-in replacement. |
| Input Type | Single-Ended | Single-Ended | Determines whether differential or single-ended signals can be measured; identical input topology preserves signal conditioning design. |
| Architecture | SAR | SAR | Successive-approximation register architecture affects latency and power behavior; matching architecture ensures equivalent dynamic performance. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Thermal envelope must match for the part to be reliable in the same application environment. |
| Package / Mounting Type | SOT-23-6, Surface Mount | SOT-23-6, Surface Mount | Footprint and mounting must be identical for physical board-level interchangeability. |
| Packaging / Ordering Quantity | Tube / Cut Tape (individual units) | Tape & Reel (full reel, "X" suffix) | The "X" suffix denotes tape-and-reel packaging for automated assembly; the electrical part is the same, but ordering form differs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADC121S101CIMF | ADC121S101CIMFX |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Obsolete | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | Supply | Supply |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the difference between ADC121S101CIMF and ADC121S101CIMFX?
The ADC121S101CIMF and ADC121S101CIMFX are the same Texas Instruments 12-bit, 1 MSPS, single-channel SAR analog-to-digital converter in a SOT-23-6 package. The "X" suffix on ADC121S101CIMFX denotes a tape-and-reel packaging option, while ADC121S101CIMF is the standard bulk/tube ordering designation. Electrical and functional specifications are identical.
Are ADC121S101CIMF and ADC121S101CIMFX electrically and functionally interchangeable?
Yes. Both orderable part numbers share the same datasheet, die, package (SOT-23-6), pinout, and specified performance, including 12-bit resolution, up to 1 MSPS throughput, and a 2.7 V to 5.25 V supply range. The only difference is the shipping/packaging format indicated by the suffix.
What are the key specifications of the ADC121S101?
The ADC121S101 is a 12-bit successive-approximation ADC with a single-ended input, up to 1 MSPS conversion rate, an SPI-compatible serial interface, and operation from a 2.7 V to 5.25 V supply. It is offered in a 6-pin SOT-23 package and is specified over the industrial temperature range of -40 °C to +125 °C.
What package and pin configuration do ADC121S101CIMF and ADC121S101CIMFX use?
Both parts are supplied in the 6-pin SOT-23 (DBV) package. The pinout consists of VDD, analog input (VIN), ground (GND), and the serial interface signals CS, SCLK, and SDATA, allowing a common PCB land pattern for either orderable part number.
Which communication interface does the ADC121S101 use?
The ADC121S101 uses an SPI-compatible serial interface with chip select (CS), serial clock (SCLK), and serial data out (SDATA) signals, supporting direct connection to most microcontrollers and DSPs without external glue logic.
Can ADC121S101CIMFX be used as a drop-in replacement for ADC121S101CIMF on an existing board?
Yes, because both orderable part numbers are the same device in the same SOT-23-6 package with identical pinout and specifications. The choice between them is a procurement/packaging decision (tape-and-reel versus standard packaging), not a design change.
What supply voltage range and temperature range apply to both parts?
Both ADC121S101CIMF and ADC121S101CIMFX operate from a single supply of 2.7 V to 5.25 V and are specified over the industrial temperature range of -40 °C to +125 °C, per the Texas Instruments datasheet.