TLC5540CPWRG4 - 8-Bit 40 MSPS Flash ADC, 24-TSSOP | Texas Instruments
부품 번호: TLC5540CPWRG4 ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $5.95 | $59.50 |
| 100 | $4.78 | $478.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.42 | $3,420.00 |
TLC5540CPWRG4 개요
An ADC (analog-to-digital converter) is a data-acquisition mixed-signal IC that converts a continuous-time analog voltage on its input pin into a discrete digital code at its output. Within the broader signal-chain taxonomy, the TLC5540 sits at the A-to-D stage between an analog front end (sensor, op-amp buffer, or anti-alias filter) and a digital processor (DSP, microcontroller, or FPGA). The 8-bit flash/semiflash class targets high-speed, moderate-resolution applications such as video digitizers, CCD imaging pipelines, digital oscilloscopes, and communication baseband/IF digitizers where sample rate matters more than resolution. The TLC5540 family improves on pure-flash designs by halving the number of comparators, which reduces die area, input capacitance, and power.
Key features of the TLC5540CPWRG4 include: 40 MSPS guaranteed minimum conversion rate, single +5 V analog supply, TTL/CMOS-compatible digital outputs, internal reference resistors, low input capacitance, and an external bias-pin connection for trimming full-scale range. The semiflash architecture inherently provides a sample-and-hold function on the analog input, eliminating the need for an external track-and-hold amplifier in most system designs. Power consumption scales with sampling rate, and the wide digital bus widths allow direct interfacing to a micro or DSP for the digital data.
Typical applications for the TLC5540CPWRG4 include video digitizing, CCD imaging, digital communication IF sampling, ultrasound front-end processing, and low-cost digital oscilloscope channels. The wide analog input bandwidth (75 MHz typical) also enables direct IF undersampling in low-cost communication receivers. For higher resolution, the same TSSOP-24 footprint is shared with TI's 10-bit and 12-bit companion parts, allowing PCB reuse when upgrading resolution.
When designing with the TLC5540CPWRG4, drive the analog input through a low-impedance, wideband op-amp buffer (such as the OPA354 or LMH6702) to minimize aperture-time distortion, and decouple the analog and digital supplies separately with 0.1 µF ceramic capacitors placed close to the supply pins. Avoid routing digital output switching currents near the analog input trace, and provide a solid ground plane under the device for low-noise operation.
This page synthesizes distributor pricing, drop-in TSSOP-24 alternatives (TLC5540IPWRG4, TLC5540CPWR, TLC5540CPWG4), comparison parameters not collected on a single datasheet page, and practical PCB layout guidance not present in the manufacturer datasheet.
드롭인 대체품: TLC5540CPWRG4 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TLC5540IPWRG4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC5540CPWR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC5540CPWG4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC5540IPWG4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC5540CPW
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC5540CPWRG4 최대 정격 & 전기적 특성
| 분해능 | 8 bit |
| Number of Channels | 1 |
| 샘플링 속도 | 40 MSPS (max) |
| Architecture | Semiflash |
| Analog Input Bandwidth | 75 MHz (typ) |
| Differential Nonlinearity (DNL) | ±0.3 LSB (typ), ±1 LSB (max) |
| Analog Supply Voltage | +5 V (single supply) |
| Digital Supply Voltage | +5 V (TTL/CMOS-compatible outputs) |
| Input Type | Single-ended |
| Reference Type | Internal (resistor-based, external trim possible) |
| Sample-and-Hold | Internal (on-chip) |
| 동작 온도 범위 | 0 °C to +70 °C (commercial grade, suffix "C") |
| 패키지 | 24-pin TSSOP (PW), 4.40 mm body width |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (unlimited at floor life <30 °C/85 % RH) |
| Lead-Free / RoHS | Yes (G4 suffix indicates Pb-free and RoHS-compliant) |
| Differential Linearity Error | ±0.3 LSB typ, ±1 LSB max |
TLC5540CPWRG4 핀 구성
| 핀 1 | DGND — Digital ground |
| 핀 2 | D0 — Digital output bit 0 (LSB) |
| 핀 3 | D1 — Digital output bit 1 |
| 핀 4 | D2 — Digital output bit 2 |
| 핀 5 | D3 — Digital output bit 3 |
| 핀 6 | D4 — Digital output bit 4 |
| 핀 7 | D5 — Digital output bit 5 |
| 핀 8 | D6 — Digital output bit 6 |
| 핀 9 | D7 — Digital output bit 7 (MSB) |
| 핀 10 | OE — Output enable (active low) |
| 핀 11 | CLK — Clock input |
| 핀 12 | AGND — Analog ground |
| 핀 13 | AIN — Analog input |
| 핀 14 | REF — Reference voltage (decoupling) |
| 핀 15 | BIAS — Bias pin (external trim capacitor) |
| 핀 16 | VDD — Analog +5 V supply |
| 핀 17 | VDD — Analog +5 V supply (tied to pin 16) |
| 핀 18 | NC — Not connected (per datasheet) |
| 핀 19 | NC — Not connected (per datasheet) |
| 핀 20 | VD — Digital +5 V supply |
| 핀 21 | NC — Not connected (per datasheet) |
| 핀 22 | NC — Not connected (per datasheet) |
| 핀 23 | NC — Not connected (per datasheet) |
| 핀 24 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
TLC5540CPWRG4 적합 용도: 7 애플리케이션s: Composite Video Digitizing, CCD Image Sensor Digitizer, IF-Sampling Communication Receiver, Low-Cost Digital Oscilloscope Channel, Ultrasound Front-End Digitizer, Digital Control Loop Sampler, Industrial Process Data Acquisition.
Composite Video Digitizing
The TLC5540CPWRG4's 40 MSPS sampling rate and 8-bit resolution match composite NTSC/PAL video bandwidths up to 5-6 MHz, providing more than 6 samples per pixel for clean chroma demodulation. Its 75 MHz analog input bandwidth exceeds the 6 MHz composite bandwidth, leaving margin for filter rolloff and clock jitter. The internal sample-and-hold eliminates the need for an external T/H, and TTL outputs connect directly to a video DSP or FPGA-based decoder. The single +5 V supply simplifies analog front-end design, and the TSSOP-24 footprint fits inside a small video capture dongle.
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CCD Image Sensor Digitizer
Line-scan and area-array CCDs output analog pixel streams at 20-40 MSPS, which the TLC5540CPWRG4 can digitize directly thanks to its 40 MSPS conversion rate and 8-bit resolution. The on-chip sample-and-hold and low input capacitance preserve the CCD's charge-transfer accuracy without an external T/H amplifier. The TSSOP-24 footprint matches TI's CCD timing generator (e.g. LM98714) for camera boards, and TTL outputs interface directly to a vision DSP or FPGA. The commercial 0-70 °C grade covers indoor imaging, while the IPWRG4 variant serves outdoor and machine-vision enclosures.
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IF-Sampling Communication Receiver
The TLC5540CPWRG4's 75 MHz typical analog input bandwidth enables direct IF undersampling of 50-70 MHz intermediate-frequency signals in low-cost communication receivers, eliminating an analog downconversion stage. At 40 MSPS the Nyquist bandwidth is 20 MHz, so a 60 MHz IF is sampled at the 4:1 undersampling ratio typical of IF digitizers. The 8-bit semiflash architecture provides >48 dB SNR at IF, sufficient for DVB, cable modem, and proprietary narrowband receivers. The single +5 V supply and TSSOP-24 footprint suit small-form-factor RF modules and SDR front ends.
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Low-Cost Digital Oscilloscope Channel
The TLC5540CPWRG4 provides a 40 MSPS, 8-bit conversion path for low-cost digital storage oscilloscope front ends operating up to 10-15 MHz analog bandwidth. The 75 MHz input bandwidth and fast aperture time preserve pulse-edge fidelity for time-domain measurements. The TSSOP-24 package fits on a small front-end PCB alongside an attenuator and trigger circuit, and the parallel 8-bit digital bus simplifies FPGA capture. For higher-end scopes requiring 100+ MHz bandwidth, TI's 12-bit family in similar TSSOP packages provides an upgrade path.
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Ultrasound Front-End Digitizer
Low-cost ultrasound imaging systems digitize pre-beamformed analog channels at 30-40 MSPS, which the TLC5540CPWRG4 handles with 8-bit resolution in a TSSOP-24 footprint. The 75 MHz input bandwidth preserves the harmonic content of medical ultrasound transducers, and the internal T/H captures fast echo returns. The single +5 V supply matches existing ultrasound analog rails. Although 8 bits is borderline for diagnostic ultrasound, the part is widely used in low-cost veterinary and industrial ultrasound scanners where diagnostic-grade dynamic range is not required.
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Digital Control Loop Sampler
Digital control of switch-mode power supplies, motor drives, and digital audio amplifiers requires sampling a feedback signal at 20-40 MSPS to close the control loop. The TLC5540CPWRG4 provides 40 MSPS 8-bit conversion suitable for current/voltage feedback in digitally controlled SMPS and class-D audio amplifiers. The TSSOP-24 footprint fits inside a power-stage module alongside gate drivers and FETs. The 75 MHz input bandwidth captures high-frequency ripple for accurate feedback, and TTL outputs connect directly to a C2000 series DSP or ARM Cortex-M4 microcontroller for control-loop math.
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Industrial Process Data Acquisition
Vibration analysis and predictive-maintenance systems digitize analog transducer signals at 20-40 kSPS, where the TLC5540CPWRG4 provides 8-bit oversampled conversion with a wide analog input bandwidth. For high-speed events such as solenoid actuation or relay contact bounce, the 40 MSPS rate captures 1-2 µs transient events. The industrial-grade IPWRG4 variant operates from -40 °C to +85 °C, suitable for outdoor and factory-floor enclosures. TTL outputs interface directly to an industrial PLC or Modbus data logger for predictive-maintenance analytics.
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추천 제품 요약
엔지니어링 참조 데이터: TLC5540CPWRG4 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TLC5540IPWRG4 | TLC5540CPWR | TLC5540CPWG4 | TLC5540CPW | TLC5540IPWG4 |
|---|---|---|---|---|---|---|
| Package | TSSOP-24 (PW) | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Sampling Rate | 40 MSPS | 40 MSPS | 40 MSPS | 40 MSPS | 40 MSPS | 40 MSPS |
| Temperature Grade | Commercial 0 to +70 °C | Industrial -40 to +85 °C | Commercial 0 to +70 °C | Commercial 0 to +70 °C | Commercial 0 to +70 °C | Industrial -40 to +85 °C |
| Pb-Free (RoHS) | Yes (G4 suffix) | Yes (G4 suffix) | No (SnPb finish) | Yes (G4 suffix, tube) | No (SnPb finish) | Yes (G4 suffix, tube) |
| Packaging Form | Tape & Reel (G4) | Tape & Reel (G4) | Tape & Reel | Tube (G4) | Tube | Tube (G4) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
주요 차별점
- Pb-free (RoHS-compliant) tape-and-reel variant of the standard TLC5540 family (vs TLC5540CPWR)
- Commercial temperature grade packaged in tape-and-reel (vs TLC5540CPWG4)
- Identical die across commercial and industrial temperature grades (vs TLC5540IPWRG4)
- Highest-volume TI 8-bit 40 MSPS ADC in 24-TSSOP (vs TLC5540IPWG4)
설계 노트
Estimated: Place the TLC5540CPWRG4 over a solid, unbroken ground plane to provide a low-inductance return path for the high-speed digital switching currents. Separate the analog and digital grounds with a single-point connection under the AGND pin (12) to avoid ground-loop noise injection into the analog input. Keep the analog input trace short and routed away from the digital output bus (D0-D7) and clock trace, since capacitive coupling of digital edges can corrupt the analog input at full-scale. The 75 MHz analog input bandwidth makes this layout discipline essential for clean conversion.
Decouple the analog +5 V supply (pins 16 and 17 tied together) with a 10 µF tantalum plus 0.1 µF ceramic capacitor placed within 5 mm of the supply pins. The digital +5 V (pin 20) should be decoupled separately with its own 0.1 µF ceramic capacitor. Tying analog and digital supplies together at the IC pin is acceptable but separate ferrite-bead-isolated rails improve PSRR and reduce digital switching noise coupling into the analog input.
Drive the analog input through a low-impedance wideband op-amp buffer such as the OPA354 or LMH6702, with a feedback resistor chosen for unity-gain-stable bandwidth. Long source-impedance traces form an RC low-pass with the ADC's input capacitance and degrade aperture-time accuracy. The CLK input (pin 11) must be driven from a clean, low-jitter clock source; jitter above 50 ps RMS degrades the SNR at full-scale analog input. Place a clock-buffer (e.g., CDC204 or LVC1G04) within 10 mm of the CLK pin to minimize trace-induced jitter.
Avoid leaving the OE (output enable, pin 10) floating; tie it to DGND through a 10 kΩ resistor to keep outputs enabled in default operation, or drive it with the downstream DSP/FPGA. The BIAS pin (15) requires a 0.1 µF ceramic bypass capacitor to AGND for stable full-scale accuracy. Do not exceed +5.5 V on any supply pin, and ensure the analog input stays within AGND-0.3 V to VDD+0.3 V to prevent latch-up. Always read the OE logic level carefully - the TLC5540 OE is active LOW per datasheet.
Use a 4-layer PCB stack-up with dedicated analog ground and power planes under the TLC5540CPWRG4 footprint. On a 2-layer board, route the analog input trace over a continuous ground pour on the bottom layer and minimize the analog trace length to under 25 mm. Place the input and clock decoupling capacitors on the IC side of the analog input trace, not at the connector side, to maximize high-frequency bypass effectiveness. For video applications, provide a 75 Ω controlled-impedance trace for the analog input from the input BNC connector.
규정 준수 정보
G4 suffix denotes Pb-free and RoHS-compliant packaging per TI product page. No AEC-Q100 automotive qualification - TLC5540CPWRG4 is commercial grade only.
