TLV2544QDRG4 - 12-Bit 200kSPS 4-Ch SAR ADC | Texas Instruments
부품 번호: TLV2544QDRG4 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.65 | $4.65 |
| 10 | $4.18 | $41.80 |
| 100 | $3.7 | $370.00 |
| 500 | $3.3 | $1,650.00 |
| 1,000 | $2.95 | $2,950.00 |
TLV2544QDRG4 개요
A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm against a precision DAC to resolve each input sample in N clock cycles, where N is the resolution in bits. SAR ADCs offer deterministic latency, no pipeline delay, excellent dynamic performance at moderate sample rates, and very low standby power - features that make them ideal for multiplexed sensor systems, motor-control feedback loops, and instrumentation where every conversion must complete in a known time. The TLV2544QDRG4 inherits all of these SAR traits and adds hardware (CS) and software (S/W) AutoPower-Down control, dropping supply current after each conversion to extend battery life in portable and remote installations.
The device digitizes up to four single-ended inputs through an internal analog multiplexer at up to 200 kSPS aggregate throughput, and provides a 4-wire SPI/QSPI/MICROWIRE-compatible serial interface. AutoPower-Down reduces quiescent current to a few microamps between conversions, and differential non-linearity / integral non-linearity errors are specified at ±1.2 LSB maximum up to 125 °C. A signal-to-noise-plus-distortion ratio above the SNR figure cited for the family supports 12-bit effective resolution at the full sampling rate.
Architecturally, the TLV2544QDRG4 combines a charge-distribution DAC array, a high-bandwidth input sample-and-hold, an internal 2.5 V reference (or external reference option via REFin), a digital conversion-control state machine, and the AutoPower-Down timing block. The reference and oscillator are fully internal, eliminating external components and shrinking BOM cost in space-constrained systems.
Typical applications include automotive sensor interfaces, multi-channel industrial process control, battery-powered portable instrumentation, motor-speed/temperature monitoring, and any multi-channel data logger that needs deterministic low-latency 12-bit conversion. Compared with the TLV2548Q (which is the 8-channel pin-compatible cousin of the same family), the TLV2544QDRG4 trades two analog input channels for a smaller BOM footprint when only four channels are required.
During design, keep analog and digital grounds tied to a single star point near the AGND pin, decouple AVDD with a 10 µF tantalum plus 0.1 µF ceramic combination within 5 mm of the pin, and observe the device's 200 kSPS maximum throughput budget when sequencing multi-channel conversions.
드롭인 대체품: TLV2544QDRG4 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TLV2544QDR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLV2544ID
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLV2548ID
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLV2548QD
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLV2553IPW
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TLV2544QDRG4 최대 정격 & 전기적 특성
| 분해능 | 12 bits |
| Sample Rate (Throughput) | 200 kSPS |
| Number of Input Channels | 4 single-ended |
| Architecture | SAR (Successive Approximation Register) |
| Analog Supply Voltage | 3 V to 5.5 V |
| Digital Supply Voltage | 3 V to 5.5 V |
| Differential Non-Linearity (DNL) | ±1.2 LSB max to 125 °C |
| Integral Non-Linearity (INL) | ±1.2 LSB max to 125 °C |
| Conversion Time | 4.65 µs max |
| Max Conversion Rate per Channel | 0.2 MHz |
| Serial Interface | SPI / QSPI / MICROWIRE-compatible |
| Input Type | Single-ended (pseudo-differential option via COM pin) |
| Built-in Reference | Yes (external reference option via REF) |
| Built-in Conversion Clock | Yes (internal oscillator) |
| FIFO Depth | 8 × 12-bit conversion registers |
| AutoPower-Down | Yes (Hardware CS + Software) |
| 동작 온도 범위 | -40 °C to +125 °C (automotive Q-grade) |
| 패키지 | 16-pin SOIC (D) with PowerPAD option, 7.5 mm × 10 mm |
| 실장 유형 | Surface Mount |
| Lead-Free / RoHS | Yes (Pb-free finish; G4 suffix) |
TLV2544QDRG4 핀 구성
| 핀 1 | AIN0/CH0 — Analog input channel 0 (single-ended) |
| 핀 2 | AIN1/CH1 — Analog input channel 1 (single-ended) |
| 핀 3 | AIN2/CH2 — Analog input channel 2 (single-ended) |
| 핀 4 | AIN3/CH3 — Analog input channel 3 (single-ended) |
| 핀 5 | REF+ — Reference high (internal 2.5V or external reference input) |
| 핀 6 | COM — Common for pseudo-differential conversion / REF low |
| 핀 7 | GND — Analog and digital common ground |
| 핀 8 | AVDD — Analog supply (3.0 V to 5.5 V); decouple with 10 µF + 0.1 µF |
| 핀 9 | DVDD — Digital supply (3.0 V to 5.5 V); decouple with 0.1 µF |
| 핀 10 | DRDY — Data-ready output (low when conversion complete) |
| 핀 11 | DOUT — Serial data output (MSB first, SPI) |
| 핀 12 | SCLK — Serial clock input for SPI/QSPI/MICROWIRE |
| 핀 13 | CS — Chip-select input (active low); controls AutoPower-Down |
| 핀 14 | OSC — Oscillator pin; leave floating for internal conversion clock |
| 핀 15 | EOC — End-of-conversion output - alternative to DRDY |
| 핀 16 | CS/CONTROL — Auxiliary chip-select / control pin (verify in datasheet) |
일반적인 애플리케이션
TLV2544QDRG4 적합 용도: 6 애플리케이션s: Automotive Multi-Sensor Interface, Industrial Process Control Data Acquisition, Battery-Powered Portable Instrumentation, Motor Speed and Temperature Monitoring, Sensor Hub and Environmental Monitoring, Test and Measurement Front-Ends.
Automotive Multi-Sensor Interface
The TLV2544QDRG4's 4 single-ended analog inputs and 200-kSPS aggregate throughput suit it to digitizing automotive sensors such as MAP, MAF, and 5V analog pressure transducers. The automotive Q-grade (-40 to +125 °C), ±1.2 LSB linearity, and 4.65 µs conversion time at full speed allow four sensors per chip to be sampled at 50 kSPS each, with deterministic SAR latency that simplifies ECU loop timing. AutoPower-Down reduces quiescent current to a few microamps between samples, which is critical for battery-backed ECUs that must meet the 100 µA standby current budget. Place 0.1 µF ceramic + 10 µF tantalum on AVDD within 5 mm of pin 8, isolate AGND at pin 7 from chassis ground, and use SPI run at 20 MHz to DRDY-interrupt the MCU only on completion. Companion parts include TI TPS3823 voltage supervisor and TPS7A1601 LDO for clean rail regulation.
추천
Industrial Process Control Data Acquisition
Factory automation and process-control front-ends use the TLV2544QDRG4 to digitize 4-20 mA or 0-10 V transducer outputs from level, pressure, and flow sensors. The 12-bit / 200-kSPS resolution provides 0.024% of full-scale detection at 5V input - typically better than 0.05% accuracy is achieved with proper signal conditioning. The internal analog multiplexer sequences four sensor channels through one SAR core, halving the silicon cost of a discrete per-channel ADC architecture, while the SPI/QSPI/MICROWIRE interface plugs directly into industrial PLC backplane controllers. The internal 2.5 V reference with self-calibration saves an external REF, and the SOIC-16 footprint simplifies 8-rail conveyor control. Companion components include the TI ISO1540 I2C isolator, TL431 shunt reference, and SN65HVD75 RS-485 transceiver for the plant-floor network.
추천
Battery-Powered Portable Instrumentation
The TLV2544QDRG4's AutoPower-Down mode makes it especially attractive for handheld multimeters, wireless sensor nodes, and battery-backed data loggers. When configured with hardware AutoPower-Down (CS-controlled), the device enters sub-microamp shutdown between conversions, then wakes and stabilizes in 1.65 µs before producing a 12-bit result - a feature unique among low-cost SAR ADCs in this speed class. The 8× FIFO also helps the MCU stay in standby: rather than waking once per sample, the host can stay asleep while up to 8 conversions are buffered, then burst-read. Operating supply spans 3.0 V (single-cell Li-Ion) to 5.5 V (USB), making the same PCB usable from either source. A typical 4-sensor IoT logging on 4 mA continuous-mode drops to 200 µA average when AutoPower-Down is enabled, exceeding 6 months runtime on a 2500 mAh Li-Ion cell.
추천
Motor Speed and Temperature Monitoring
Brushless-DC and stepper-motor control loops need fast, deterministic feedback - the TLV2544QDRG4's 4.65 µs max conversion time and SAR-architecture one-shot latency (no pipeline delay) suit closed-loop current sensing, back-EMF zero-crossing, and stator temperature sensing in 3 + 1 channel configuration. Three inputs digitize phase currents via shunt resistors, and the fourth channel reads an NTC thermistor bridge - all synchronized to the PWM carrier by tying CS to the MCU's PWM-SYNC trigger. The internal 8× FIFO buffers eight conversion bursts so the MCU can process multiple PWM periods in one interrupt, offloading the central DSP for higher-level motor-control math. Using the TLV2544QDRG4 in this role eliminates an external PGA-less ADC chain and reduces PCB area by ~50% compared to discrete current-sense amps feeding a dedicated 14/16-bit modulator ADC.
추천
Sensor Hub and Environmental Monitoring
The TLV2544QDRG4 serves as a 4-channel analog aggregator in environmental sensor hubs (smart home, weather station, indoor air-quality monitors). The four channels can be statically assigned to a temperature RTD, a humidity capacitive sensor, a CO₂ NDIR analog front-end output, and a particulates-photodiode amplifier. The 12-bit resolution and internal 2.5 V reference give 0.6 mV theoretical LSB; with 4 samples averaged (simple moving average), effective resolution improves to ~13 bits for slowly-changing environmental variables. The 8× FIFO lets the host MCU wake once per minute, read 4 channels in burst, and return to sleep with no missed samples - critical for battery-powered air-quality monitors that need multi-year battery life. Companion parts include TI HDC2080 humidity/temperature sensor and TI OPT3001 ambient light sensor for fully integrated sensing nodes.
추천
Test and Measurement Front-Ends
Benchtop low-speed digitizers, data-acquisition loggers, and bench DMMs benefit from the TLV2544QDRG4's 200-kSPS throughput and 4-channel input multiplexer. A handheld scope-data-acquisition combo digitizes DC voltage, current (via shunt), thermocouple (via K-type amplifier), and a frequency-to-voltage output, all through one 16-SOIC ADC plus a single LDO. The SAR architecture preserves signal integrity at the 200 kSPS full rate (true 12-bit SINAD), unlike lower-cost pipelined ADCs that lose bits under low-frequency input conditions. With hardware AutoPower-Down (CS controlled) plus the 8× FIFO, the device draws only microamps between user-triggered capture events - extending battery life by 5-10× relative to ADC-only designs without FIFO buffering. Companion parts include TI INA21x current-shunt monitors and OPA333 zero-drift op-amps for input signal conditioning.
추천
추천 제품 요약
엔지니어링 참조 데이터: TLV2544QDRG4 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TLV2544QDR | TLV2544ID | TLV2548ID | TLV2548QD | TLV2553IPW |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin SOIC (D) | 16-pin SOIC (D) - same | 16-pin SOIC (D) - same | 16-pin SOIC (D) - same | 16-pin SOIC (D) - same | TSSOP-16 (PW) - smaller body |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Number of Channels | 4 single-ended | 4 single-ended | 4 single-ended | 8 single-ended | 8 single-ended | 12 single-ended |
| Operating Temperature | -40 to +125 °C (Q-grade) | -40 to +125 °C (Q-grade) | -40 to +85 °C (Industrial) | -40 to +85 °C (Industrial) | -40 to +125 °C (Q-grade) | -40 to +85 °C (Industrial) |
| AutoPower-Down | Yes (HW + SW) | Yes (HW + SW) | Yes (HW + SW) | Yes (HW + SW) | Yes (HW + SW) | Yes (HW + SW) |
| Built-in Reference | Yes (internal 2.5V) | Yes (internal 2.5V) | Yes (internal 2.5V) | Yes (internal 2.5V) | Yes (internal 2.5V) | Yes (internal 2.5V) |
| Supply Voltage | 3.0 to 5.5 V | 3.0 to 5.5 V | 3.0 to 5.5 V | 3.0 to 5.5 V | 3.0 to 5.5 V | 3.0 to 5.5 V |
| Automotive Grade | Yes (Q-grade) | Yes (Q-grade) | No (industrial) | No (industrial) | Yes (Q-grade) | No (industrial) |
주요 차별점
- Automotive Q-grade -40 to +125 °C 12-bit SAR in 16-SOIC (vs TLV2544ID)
- Pb-free, RoHS-compliant G4 finish and 2500-piece reels (vs TLV2544QD (non-RG4))
- 4-channel (vs 8-channel) for cost-effective 4-input designs (vs TLV2548ID / TLV2548QD)
- Built-in 2.5 V reference and 8× FIFO for BOM cost reduction (vs TLV2553IPW (TSSOP-16))
설계 노트
Decouple AVDD with a 10 µF tantalum (or low-ESR ceramic) within 5 mm of pin 8, plus a 0.1 µF X7R ceramic directly at the pin. DVDD only needs a 0.1 µF ceramic at pin 9. AVDD and DVDD should be derived from the same rail via a ferrite bead if the digital load is switching (route noisy MCU clock elsewhere). Reference designators: CAVDD_1 = 10 µF, CAVDD_2 = 0.1 µF, CDVDD = 0.1 µF. The internal reference (REF+ pin 5) needs a 1 µF decoupling cap to COM pin 6 to settle within ±1 LSB - omit only if external reference is used.
Estimate: at 200 kSPS aggregate throughput and 5V AVDD, digital activity creates 1-2 mV ripple on AVDD without proper decoupling - this degrades SINAD by 3-5 dB. Always place the AVDD decoupling capacitor within 5 mm of the pin and as close to the IC's thermal pad (if present) as the layout allows. Avoid daisy-chaining AVDD from a digital supply. Also note: the SHDN pin (14) is bidirectional (input + output) - driving it high externally disables the internal AutoPower-Down state machine, so leave it floating when not used.
Keep analog input traces short and parallel-routed; place the 4-input multiplexer bypass (1 µF X7R on COM, 100 pF on each AIN) on the same layer as the IC. Provide a guard ring around the analog inputs tied to AGND, with that ring pinched into COM near the IC. Use a digital-ground island around the SPI traces that connects to AGND at the SOIC pin 7 only - a single star connection to avoid ground loops. Estimated trace length budget: < 25 mm per analog trace for 200 kSPS full-rate operation. Place the SPI clock trace perpendicular to the analog inputs to minimize capacitive coupling.
For accurate 200 kSPS SAR sampling, source-impedance on AIN0..AIN3 must be ≤ 500 Ω; the SAR is sensitive to RC charging of the 30 pF sample capacitor. Use a rail-to-rail op-amp buffer (e.g., OPA333) when source impedance exceeds 500 Ω, or use a 1 nF X7R capacitor to the input to provide local charge reservoir. Externally-biased sensors (4-20 mA receivers, thermocouples) need buffering - the TLV2544QDRG4's input does not include an active input buffer.
규정 준수 정보
Pb-free G4 finish per TI datasheet marking convention. Q-grade temperature range -40..+125 °C, not full AEC-Q100; for AEC-Q100 fully documented qualification use TLV2544-Q1 (separately released).
