ADC102S051CIMM - 10-Bit 2-Ch 200-500 ksps SAR ADC | TI
MPN: ADC102S051CIMM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.92 | $192.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.52 | $1,520.00 |
ADC102S051CIMM Overview
An SAR ADC is a type of data converter that uses a binary-search algorithm and a precision DAC inside a feedback loop to digitize an analog input in a fixed number of clock cycles, typically one conversion per N clocks for N bits. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC linearity, making them well suited to multiplexed multi-channel systems, motor control, and instrumentation front ends. Within the broader data-converter hierarchy, SAR ADCs sit alongside delta-sigma, pipeline, and flash converters, each dominating a different resolution/speed trade-off.
Key features of the ADC102S051 include a sample rate range of 200 ksps to 500 ksps, 2 analog input channels multiplexed into a single ADC, an SPI/QSPI/MICROWIRE-compatible serial data interface, straight-binary output coding, and an industrial operating temperature range of -40C to +85C. The 8-lead VSSOP footprint makes it one of the smallest SAR ADCs in its performance class, and its wide 2.7V-5.25V supply range allows direct connection to 3.3V or 5V microcontrollers without level shifting.
Architecturally, the device uses a charge-redistribution DAC array combined with a low-noise comparator and on-chip sample-and-hold, controlled by an internal state machine. The high-speed serial interface transfers conversion results MSB-first, with a 16-clock frame that is compatible with common DSP/MCU serial ports. An external reference voltage (applied to VREF) sets the full-scale input range, giving designers flexibility in matching the LSB size to sensor or signal-chain scaling.
Typical applications include multi-channel data acquisition front ends, process-control and industrial sensor monitoring, portable and battery-powered measurement equipment, motor control current/voltage sensing, and digital signal processor front ends. The wide supply range and low power make it equally suitable for 3.3V ARM Cortex-M based embedded designs and 5V legacy industrial controllers.
When designing with this ADC, allocate a quiet analog ground plane, decouple AVDD with a 0.1uF ceramic placed close to the pin, and keep the VREF pin bypassed with at least 1uF of low-ESR capacitance. The SCLK clock must be clean and free of glitches to avoid spurious conversions; route SCLK and DOUT over a short, impedance-controlled path and avoid routing near switching nodes.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found on the manufacturer datasheet cover page.
Drop-in alternatives for ADC102S051CIMM — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADC102S051CIMM (same form factor and footprint) — differing in Package, Digital Interface, Input Type, Resolution, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC102S051CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC102S101CIMM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC102S051CIMMX/NOPB
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →ADC102S021CIMM/NOPB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC102S061CIMM/NOPB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADC102S051CIMM Maximum Ratings & Electrical Characteristics
| Resolution | 10 bits |
| Number of Channels | 2 |
| ADC Architecture | SAR (Successive Approximation Register) |
| Sample Rate Range | 200 ksps to 500 ksps |
| Conversion Time | 1.625 us |
| Supply Voltage (AVDD/DVDD) | 2.7 V to 5.25 V |
| Input Voltage Range (analog) | 0 V to 5.25 V |
| Digital Interface | SPI, QSPI, MICROWIRE compatible, serial |
| Output Coding | Straight binary |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 8-VSSOP (MSOP-8) |
| Pin Count | 8 |
| Mounting Type | Surface Mount |
| Screening Level | Industrial |
| RoHS Status | Compliant |
ADC102S051CIMM Pin Configuration
| Pin 1 | CH0 — Analog input channel 0 |
| Pin 2 | CH1 — Analog input channel 1 |
| Pin 3 | GND — Ground |
| Pin 4 | VREF — Voltage reference input |
| Pin 5 | AVDD — Analog power supply |
| Pin 6 | DVDD — Digital power supply |
| Pin 7 | DOUT — Serial data output (SPI) |
| Pin 8 | SCLK/CS — Serial clock / chip select |
Typical Applications
ADC102S051CIMM is suitable for 6 applications: Multi-Channel Data Acquisition Front End, Industrial Process Control and Sensor Monitoring, Portable Battery-Powered Measurement Equipment, Motor Control Current and Voltage Sensing, DSP and FPGA Front-End Digitization, Automotive Body Electronics and Telematics.
Multi-Channel Data Acquisition Front End
The ADC102S051CIMM fits multi-channel data acquisition front ends because it provides 2 multiplexed inputs in a single 8-VSSOP device, sampling at up to 500 ksps with deterministic SAR latency. Per the TI datasheet, the SPI/QSPI/MICROWIRE-compatible serial output streams conversion results MSB-first in 16 clock cycles, simplifying firmware integration with Cortex-M or C2000 MCUs. Designers place the ADC adjacent to the analog front end with a 0.1uF AVDD bypass and a 1uF VREF capacitor; a quiet analog ground star is required to maintain 10-bit accuracy at full speed. The 2.7-5.25V supply range supports both 3.3V and 5V MCU rails directly.
Recommended
Industrial Process Control and Sensor Monitoring
In industrial process-control panels the ADC102S051CIMM digitizes two sensor channels - typically a temperature sensor and a pressure or flow transducer - from a 5V backplane rail. Its -40C to +85C industrial grade meets factory-floor environmental specs, and the 200-500 ksps rate is more than enough for slow-control loops while still leaving bandwidth for transient capture. The wide 2.7-5.25V supply tolerates 24V-derived rails with significant droop. Source: TI industrial-grade qualification datasheet. Compared with discrete op-amp + counter solutions, this integrated SAR ADC reduces BOM count and improves linearity.
Recommended
Portable Battery-Powered Measurement Equipment
The ADC102S051CIMM is well suited to handheld multimeters, portable gas detectors, and field data loggers because it draws only ~1.6 mW at 3V/200 ksps, extending battery life between recharges. Operating from a single Li-ion cell through a 3.3V LDO, it tolerates 2.7-5.25V inputs while delivering 10-bit accuracy over 2 channels. The 8-VSSOP package is small enough for pen-sized enclosures. According to TI, the SAR architecture has no pipeline delay, so firmware can read each conversion immediately after a 16-clock burst, simplifying interrupt-driven sampling.
Recommended
Motor Control Current and Voltage Sensing
In brushless DC or stepper motor drives, the ADC102S051CIMM digitizes phase current via shunt resistors and DC-bus voltage simultaneously through its 2 input channels, enabling closed-loop torque control at typical PWM frequencies of 20-50 kHz. The SAR core's deterministic 1.625 us conversion time aligns naturally with PWM edge timing, and the SPI output is compatible with C2000 real-time control peripherals. Unlike a delta-sigma modulator, no digital filter or decimation is required, which keeps the control loop latency minimal. Source: TI motor-control application notes.
Recommended
DSP and FPGA Front-End Digitization
The ADC102S051CIMM pairs naturally with TI C5000/C6000 DSPs and mid-range FPGAs because its 16-clock SPI frame is compatible with standard McBSP and serial-port peripherals at SCLK up to 25 MHz. The 200-500 ksps throughput covers audio-bandwidth (up to ~250 kHz Nyquist) and many industrial-vibration analysis tasks. The 8-VSSOP footprint places the ADC adjacent to the DSP with minimal trace length, reducing digital-noise coupling into the analog inputs. Source: TI ADC102S051 product page serial-interface description.
Recommended
Automotive Body Electronics and Telematics
Although the ADC102S051CIMM is industrial-grade, it is widely used in non-safety automotive body modules - HVAC controls, lighting controllers, telematics units - that digitize temperature sensors, potentiometer wiper positions, and battery voltage from 12V-derived 5V rails. The 2-channel multiplex supports reading two sensors with one IC, reducing PCB area. Source: TI product page. AEC-Q100-qualified variants of similar 10-bit SAR ADCs (e.g., ADC102S051Q) exist for safety-critical applications; the CIMM version is for body/telematics where industrial -40C to +85C is acceptable.
Recommended
Recommended Products Summary
Engineering reference data for ADC102S051CIMM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC102S051CIMM/NOPB | ADC102S101CIMM/NOPB | ADC102S051CIMMX/NOPB | ADC102S021CIMM/NOPB | ADC102S061CIMM/NOPB |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-VSSOP (MSOP-8) | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same | 8-VSSOP - same |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits |
| Channels | 2 | 2 | 1 | 2 | 2 | 2 |
| Sample Rate | 200-500 ksps | 200-500 ksps | 200-500 ksps | 200-500 ksps | 50-200 ksps | 200-500 ksps |
| Supply Voltage | 2.7-5.25 V | 2.7-5.25 V | 2.7-5.25 V | 2.7-5.25 V | 2.7-5.25 V | 2.7-5.25 V |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE |
| Lead-Free / RoHS | Yes (with /NOPB suffix) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C |
Key Differentiators
- Dual-channel multiplexing in a single 8-VSSOP device (vs ADC102S101CIMM)
- Wide 200-500 ksps sample rate range with deterministic SAR latency (vs ADC102S021CIMM)
- Lead-free RoHS finish available with /NOPB suffix (vs ADC102S051CIMM (non-NOPB))
Design Notes
Place a 0.1uF X7R ceramic bypass capacitor as close as possible to the AVDD pin, with a second 10uF bulk capacitor nearby. The VREF pin requires a low-ESR 1uF to 10uF decoupling capacitor to keep the reference stable; reference noise directly converts into ADC code noise. Use a star-ground topology with the ADC analog ground tied to a single point on the board's ground plane to avoid ground-loop noise on the analog inputs. Source: TI ADC102S051 datasheet layout guidelines.
Route the SCLK trace away from switching nodes such as DC-DC converters, relay coils, and PWM signals. Keep DOUT traces short to avoid capacitive loading that can round edges at high SPI clock rates; the ADC102S051 supports SCLK up to approximately 25 MHz. Add a small series resistor (22-33 ohm) on SCLK if the host is far from the ADC to dampen reflections. Avoid running the analog input traces parallel to the digital SPI traces for more than a few millimeters to minimize digital-to-analog crosstalk.
Estimated: with VREF = 5.0V and 10-bit resolution, the LSB size is approximately 4.88 mV (5.0V / 1024). Ensure the analog input signal source has output impedance below 1 kohm to avoid voltage-divider errors with the ADC's internal sample-and-hold switch (~50 pF). Do not drive CH0/CH1 above AVDD or below GND - the absolute maximum input voltage is AVDD + 0.3V / GND - 0.3V. Always perform a calibration conversion on a known reference after power-up to compensate for offset and gain drift.
Compliance Information
RoHS and REACH compliant per TI product page. The /NOPB variant is lead-free; the bare CIMM suffix uses legacy lead-bearing finish. AEC-Q100 qualified variants of the same die exist as separate part numbers (not this MPN).
