ADC124S051CIMM - 4-Ch 12-Bit 500kSPS SAR ADC | Texas Instruments
부품 번호: ADC124S051CIMM ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.81 | $58.10 |
| 100 | $5.2 | $520.00 |
| 500 | $4.62 | $2,310.00 |
| 1,000 | $4.05 | $4,050.00 |
ADC124S051CIMM 개요
What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data converter that resolves a sampled analog input one bit per clock cycle against an internal DAC and comparator. In the broader taxonomy, the ADC124S051 belongs to the SAR ADC family, which sits within successive-approximation ADCs, data converters, signal-chain ICs, and finally the semiconductor category. SAR ADCs are prized for deterministic latency, low power, and excellent DC accuracy, which is why they dominate multiplexed low-channel-count instrumentation, sensor readouts, and embedded control applications.
Key features of this device include a true-differential input pair (CH1+/CH1-, CH2+/CH2-) configured as four pseudo-differential single-ended channels, an external reference input (VREF, 1V to VDD), a hardware-/software-shutdown pin (SHDN) that drops quiescent current to 0.06 µA, and pin-compatible scaling from 8-bit (ADC084S051) to 12-bit (ADC124S051). The part operates from -40°C to +85°C and ships in the miniature 10-pin VSSOP package that fits on a 3 mm × 3 mm land pattern.
Architecturally, the device combines an on-chip sample-and-hold amplifier, a charge-redistribution SAR core, an internal oscillator, and an SPI-compatible serial output. The factory-trimmed internal reference is not used here; an external 2.5 V reference is typical. Latency is one conversion clock period, which simplifies digital control loops that need deterministic sampling.
Typical applications include portable patient monitors, industrial multi-sensor modules, factory automation backplanes, battery-management telemetry, optical-module monitoring, and 4-20 mA loop digitizers. Pairing the ADC124S051 with an external 2.5 V reference such as the TI REF3025 and an op-amp driver such as the OPA2333 delivers 12-bit accurate readings across a -40°C to +85°C industrial envelope.
A practical design tip: route the VREF trace as a guard trace and place the 10 µF plus 0.1 µF decoupling combination within 5 mm of the VREF pin. Avoid switching the analog multiplexer into a >0.4 µF charged capacitive load directly to minimize kickback errors. If mid-scale accuracy at 500 kSPS matters more than full-rate throughput, dithering the input by one LSB reduces noise-folded errors.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer's datasheet and are not aggregated on competing distributor listings.
드롭인 대체품: ADC124S051CIMM — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ADC124S051CIMM (동일 폼 팩터 및 풋프린트) — 차이점: Package, Architecture, Digital Interface, Input Type, Number of Channels.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ADC124S051CIMM/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADC084S051CIMM
✅ 드롭인✓ 재고 있음
$1.89 / 개
데이터시트 보기 →ADC124S021CIMMX
✅ 드롭인✓ 재고 있음
$2.07 / 개
데이터시트 보기 →ADC122S101CIMM
✅ 드롭인✓ 재고 있음
$1.96 / 개
데이터시트 보기 →ADS7841E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCP3204-CI/MS
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ADC124S051CIMM 최대 정격 & 전기적 특성
| 분해능 | 12 bit |
| Sample Rate | 200 kSPS to 500 kSPS |
| Number of Channels | 4 |
| Input Type | Single-Ended (4 pseudo-differential pairs) |
| Architecture | SAR (Successive Approximation) |
| 공급 전압 | 2.7 V to 5.25 V (single supply) |
| Analog Supply Current at 200 kSPS | 1.55 mW total (typ) |
| 셧다운 전류 | 0.06 µA (typ) |
| External Reference Voltage | 1 V to VDD (typ 2.5 V) |
| Digital Interface | SPI / QSPI / MICROWIRE-compatible |
| 동작 온도 범위 | -40 °C to +85 °C |
| 패키지 | 10-pin VSSOP (DGS) 3 mm × 3 mm |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (unlimited) |
| RoHS 상태 | Compliant |
| Pin Compatibility | Pin-compatible with ADC084S051 (8-bit) and ADC124S021 (lower speed) |
ADC124S051CIMM 핀 구성
| 핀 1 | AIN1+ / AIN1 — Analog input channel 1 (positive or single-ended) |
| 핀 2 | AIN1- — Analog input channel 1 negative (pseudo-differential) |
| 핀 3 | AIN2+ / AIN2 — Analog input channel 2 (positive or single-ended) |
| 핀 4 | AIN2- — Analog input channel 2 negative (pseudo-differential) |
| 핀 5 | SHDN — Hardware shutdown (active low; tie to VA to enable) |
| 핀 6 | VA — Analog supply voltage (2.7 V to 5.25 V) |
| 핀 7 | GND — Ground |
| 핀 8 | VREF — External reference voltage input (1 V to VDD) |
| 핀 9 | DOUT — Serial data output (SPI MOSI; functions as DRDY# when CS# is held high) |
| 핀 10 | CS# — Active-low chip select for SPI interface |
일반적인 애플리케이션
ADC124S051CIMM 적합 용도: 7 애플리케이션s: Portable Patient Monitoring (SpO2 / ECG Telemetry), Industrial Multi-Sensor Module (PLC / 4-20 mA Digitizer), Optical Module Monitoring (SFP / QSFP Transceivers), Battery Management Telemetry (BMS Cell Monitor), Factory Automation Backplane (Sensor Hub / Edge Node), Multi-Channel Data Acquisition Card (USB / PC-Based DAQ), IoT Sensor Node (Smart Building / HVAC).
Portable Patient Monitoring (SpO2 / ECG Telemetry)
The ADC124S051's 4-channel input is ideal for multi-lead patient-monitoring front ends where 4 sensors (SpO2, respiration, ECG, temperature) must be digitized from a single battery rail. At 200 kSPS aggregate across 4 channels (50 kSPS per channel), 12-bit resolution is sufficient for IEC 60601-1-8 clinical-grade SpO2 desaturation detection. The 1.55 mW power at 200 kSPS keeps total board draw below 5 mW, and the 0.06 µA shutdown mode preserves battery life between readings - critical for wearable 5-day telemetry patches.
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Industrial Multi-Sensor Module (PLC / 4-20 mA Digitizer)
Industrial PLCs and remote I/O modules need 4-20 mA loop digitizers at 12-bit accuracy. The ADC124S051CIMM provides 4 single-ended inputs at 500 kSPS, allowing simultaneous digitizing of 4 loop currents at 125 kSPS each - well above the 100 Hz bandwidth required for process control. Pair the part with an external 2.5 V reference (TI REF3025) and a current-sense amplifier such as the INA240 to digitize ground-referenced 4-20 mA loops. The 10-VSSOP footprint and -40°C to +85°C rating fit compact DIN-rail modules.
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Optical Module Monitoring (SFP / QSFP Transceivers)
SFP and QSFP optical transceivers require monitoring of 4-6 analog signals: TX bias, TX power, RX power, and temperature. The ADC124S051CIMM digitizes 4 of these via its 4 single-ended channels at 200-500 kSPS, providing 12-bit accuracy for the 0.1 dB laser-power reporting required by SFF-8472. With a single 3.3V supply and 1.55 mW dissipation, it slots into the module's tight power budget. The shutdown pin enables <1 µA standby, vital for host-side power of sleeping optical links.
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Battery Management Telemetry (BMS Cell Monitor)
Battery management systems digitize cell voltages, pack current, and temperature at 12-bit resolution. The ADC124S051CIMM's 4 channels can monitor 4 cell voltages at 100 kSPS aggregate, providing 12-bit (1.2 mV at 4.096 V reference) accuracy - sufficient for cell balancing decisions. The 0.06 µA shutdown mode preserves quiescent current during sleep, critical for long-storage battery packs. Pin-compatible with TI's BMS-focused ADC family for migration to higher-resolution or higher-channel devices in future generations.
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Factory Automation Backplane (Sensor Hub / Edge Node)
Industrial edge nodes aggregate 4 analog sensor inputs - temperature, pressure, humidity, and flow - over a 4-20 mA or 0-10V interface. The ADC124S051CIMM digitizes all 4 at 12-bit/500 kSPS, supporting deterministic 100 µs conversion cycles per channel needed for closed-loop control. Its single 5V supply simplifies field-side power design, and the VSSOP-10 footprint allows the digitizer to sit adjacent to each input connector. Pair with an RS-485 transceiver (such as TI ISO3086) for isolated backplane communication.
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Multi-Channel Data Acquisition Card (USB / PC-Based DAQ)
PC-based data acquisition cards require 4-8 simultaneous-monitor analog inputs at 12-bit resolution and >100 kSPS aggregate. The ADC124S051CIMM delivers 4 channels at 500 kSPS, supporting continuous streaming to a host MCU or FPGA over SPI. Its 0.06 µA shutdown mode enables burst-mode acquisition that keeps average power below 100 µW. Common configurations pair four ADC124S051s in parallel for a 16-channel DAQ card, all sharing the same 10-VSSOP footprint for layout uniformity.
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IoT Sensor Node (Smart Building / HVAC)
Smart-building HVAC and IoT sensor nodes aggregate 4 analog signals - temperature, humidity, light, and gas - over a single ADC. The ADC124S051CIMM at 200 kSPS provides 50 kSPS per channel, which is more than sufficient for 10 Hz environmental monitoring. Its 1.55 mW typical power enables multi-year battery life on coin cells when paired with duty-cycled sampling and the 0.06 µA shutdown mode. The 10-VSSOP package is small enough to fit alongside a wireless MCU like the CC2640 in a 25 mm × 25 mm sensor beacon.
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추천 제품 요약
엔지니어링 참조 데이터: ADC124S051CIMM — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ADC124S051CIMM/NOPB | ADC084S051CIMM | ADC124S021CIMMX | ADC122S101CIMM | ADS7841E | MCP3204-CI/MS |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology |
| Package | VSSOP-10 (DGS) | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | MSOP-10 - same footprint family |
| Resolution | 12 bit | 12 bit | 8 bit (-33%) | 12 bit | 12 bit | 12 bit | 12 bit |
| Maximum Sample Rate | 500 kSPS | 500 kSPS | 500 kSPS | 50 kSPS (-90%) | 500 kSPS | 200 kSPS (-60%) | 100 kSPS (-80%) |
| Number of Channels | 4 | 4 | 4 | 4 | 2 (-50%) | 4 | 4 |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.0 V | 2.7 V to 5.5 V |
| Lifecycle Status | Obsolete | Active (lead-free variant) | Obsolete | Active | Active | Active | Active |
| SPI Frame Format | 12-bit two-byte MSB-first | Identical 12-bit two-byte MSB-first | 8-bit one-byte (different length) | Identical 12-bit two-byte MSB-first | Identical 12-bit two-byte MSB-first | 12-bit two-byte MSB-first (frame timing differs) | 12-bit two-byte MSB-first (one extra SCLK) |
| Approximate Unit Price (qty 100) | USD 5.20 | USD 4.95 | USD 4.20 | USD 3.80 | USD 4.60 | USD 5.10 | USD 4.40 |
주요 차별점
- Pin-compatible migration path across resolution and speed grades (vs Microchip MCP3204-CI/MS)
- Lowest quiescent shutdown current in its class (vs MCP3204-CI/MS)
- Single-supply 2.7 V to 5.25 V with no level shifter required (vs ADS7841E)
- Active lead-free variant available on same die (vs MCP3204-CI/MS)
설계 노트
Power-supply decoupling: place a 10 µF tantalum (or 4.7 µF X7R ceramic) plus a 0.1 µF ceramic within 5 mm of the VA pin to suppress the high-frequency switching noise of the SAR ADC's internal charge pump. The 1.55 mW typical at 200 kSPS means 3.3V × 470 µA, and bypassing that ripple with a ferrite bead on the VA trace is recommended for noise-sensitive multi-channel boards. The SHDN pin drops quiescent current to 0.06 µA when pulled low - use a 10 kΩ pull-down for failsafe.
VREF trace routing: route the external reference trace as a guard trace with a ground-fill on both sides, keeping the trace length under 10 mm. Place the 10 µF + 0.1 µF VREF decoupling directly at the pin. Route AIN1+ and AIN1- as a matched pair (length-matched within 2 mm) and keep them on the analog layer with a continuous ground plane underneath. The DOUT trace should be routed away from analog inputs to avoid digital-to-analog coupling.
Input kickback and multiplexer crosstalk: the SAR ADC's internal sample-and-hold capacitor (~20 pF) charges from the analog input on every conversion, injecting a small kickback spike. Avoid driving the analog inputs from high-impedance sources (>10 kΩ) without an input buffer such as the OPA2333 - a series RC of 50 Ω + 100 pF at each input can dampen the kickback if a buffer is unavailable. For multi-channel scanning, allow at least one full conversion cycle between channel switches for settling to 12-bit accuracy.
Common pitfalls: (1) Do not leave SHDN floating - it must be tied high to VA via a pull-up or driven by the MCU; floating SHDN leaves the part in indeterminate state. (2) Do not exceed the maximum VREF rating (VDD) - reference voltages above VA damage the input ESD structure. (3) Do not apply analog inputs before VA is powered up - the input ESD clamp draws current through the analog input. (4) The CS# pin must be held low for the entire conversion to avoid premature DOUT transitions.
규정 준수 정보
ADC124S051CIMM (non-NOPB) is lead-bearing for legacy applications; the /NOPB suffix is the lead-free RoHS-compliant variant. Not AEC-Q100 qualified - for automotive applications use AEC-Q100-qualified SAR ADCs in TI's automotive portfolio.
