TLV3801 - 225ps LVDS High-Speed Comparator | Texas Instruments
料号： TLV3801 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.78 | $6.78 |
| 10 | $6.1 | $61.00 |
| 100 | $5.42 | $542.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.32 | $4,320.00 |
TLV3801 概述
A comparator is an electronic circuit that compares two input voltages and outputs a digital signal indicating which is larger. The TLV3801 belongs to the high-speed comparator subclass, optimized for minimal propagation delay and high toggle rates. It sits within the analog-to-digital interface hierarchy, bridging analog signals to LVDS digital logic levels for downstream FPGAs and CPUs.
Key features include a 225-ps propagation delay, complementary LVDS outputs that reduce EMI and suppress common-mode noise, and low power consumption of about 6.5 mW at 3.3 V. An enable pin supports power management and rail sequencing. The LVDS output stages drive standard LVDS inputs directly at up to 3 GHz toggle frequency.
The device is built on a bipolar process with a differential input stage and LVDS output drivers, delivering deterministic, low-jitter switching. It is specified over the industrial temperature range of -40C to +125C, and an automotive-grade TLV3801-Q1 variant is available for AEC-Q100 applications.
Typical applications include LIDAR pulse detection, where every nanosecond of propagation delay affects range resolution, high-speed differential line receivers for data transmission, and optical sensor modules. Clock recovery and fast data acquisition systems also benefit from the high toggle rate.
Design tip: terminate the LVDS outputs with 100 ohm differential impedance and decouple each supply pin with 0.1 uF capacitors placed as close to the device as possible to preserve signal integrity.
直接替换替代料： TLV3801 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TLV3801QDSGRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TLV3801DSGT
✅ 直接替换📋 参考替代料（不在目录中）
TLV3501DSGR
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TLV3801 最大额定值与电气特性
| Propagation Delay | 225 ps (typical) |
| Toggle Frequency | 3 GHz |
| 输出类型 | Complementary LVDS |
| Single Supply Voltage Range | 2.7 V to 5.25 V |
| Split Supply Voltage Range | ±1.35 V to ±2.625 V |
| Power Consumption | 6.5 mW at 3.3 V |
| 使能引脚 | Yes |
| 封装 | 8-WSON (DSG) 2x2 mm |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +125C |
| Automotive Variant | TLV3801-Q1 (AEC-Q100) |
| Output Interface | LVDS, drives standard FPGA/CPU LVDS inputs |
| RoHS 状态 | Compliant |
| Input Stage | Differential |
| Process Technology | Bipolar high-speed |
TLV3801 引脚配置
| 引脚 1 | IN- — Inverting input |
| 引脚 2 | GND — Ground / negative supply |
| 引脚 3 | EN — Enable (comparator active when high) |
| 引脚 4 | OUT+ — Non-inverting LVDS output |
| 引脚 5 | OUT- — Inverting LVDS output |
| 引脚 6 | VCC — Positive supply, 2.7 V to 5.25 V (single supply) |
| 引脚 7 | IN+ — Non-inverting input |
| 引脚 8 | VEE — Negative supply for split-supply operation |
典型应用
TLV3801 适用于 6 应用s: LIDAR Pulse Detection, High-Speed Differential Line Receiver, Optical Sensor Modules, Clock Recovery and Distribution, Test and Measurement Instrumentation, Automotive Proximity and Optical Sensing.
LIDAR Pulse Detection
In LIDAR time-of-flight receivers, the TLV3801 converts fast avalanche-photodiode or SPAD return pulses into clean LVDS edges for FPGA time-to-digital converters. Its 225 ps propagation delay bounds range error to a few centimeters, and the 3 GHz toggle frequency resolves narrow return pulses without pulse smearing. The complementary LVDS outputs suppress common-mode noise from the photodiode front end. Place the comparator close to the TDC and terminate with 100 ohm differential impedance to preserve edge fidelity.
推荐
High-Speed Differential Line Receiver
The TLV3801 acts as a LVDS-output line receiver for CML/LVPECL signals on high-speed serial links. The differential input stage compares AC-coupled signals up to hundreds of MHz, and the 3 GHz toggle rate supports multi-gigabit line coding schemes. Because the outputs are already LVDS, they connect directly to FPGA or CPU LVDS input banks with no level-shifting stage, reducing latency and component count. AC-coupled designs benefit from the wide 2.7 V to 5.25 V supply range for bias flexibility.
推荐
Optical Sensor Modules
Compact optical sensing modules benefit from the TLV3801's 2x2 mm 8-WSON package, which fits beside the photodiode within millimeters to minimize the analog trace length that dominates noise pickup. The 6.5 mW power at 3.3 V suits battery-powered and portability-sensitive sensors, while the enable pin allows gating the comparator during idle periods. LVDS outputs carry decision data back through harnesses with high immunity, and the -40C to +125C range covers industrial optical sensing environments.
推荐
Clock Recovery and Distribution
In clock recovery circuits, the TLV3801 squares up attenuated or noisy clock edges before feeding phase detectors or FPGA MMCM inputs. The 225 ps fixed delay adds a deterministic offset that can be calibrated, and the 3 GHz toggle frequency supports sub-nanosecond clock periods. LVDS output symmetry minimizes duty-cycle distortion, a critical parameter for recovery loops. Use short, length-matched differential traces and a clean low-noise supply rail derived from an LDO for best jitter performance.
推荐
Test and Measurement Instrumentation
Oscilloscope trigger front ends and counter/timer inputs use the TLV3801 for its low, predictable 225 ps delay and 3 GHz bandwidth. The split-supply operation (±1.35 V to ±2.625 V) lets the input common-mode be referenced near 0 V for AC-coupled measurement signals. LVDS outputs feed time-to-digital converters or FPGA counters directly. The TLV3801EVM evaluation module supports bench evaluation of timing performance with different measurement tools before committing to layout.
推荐
Automotive Proximity and Optical Sensing
The automotive-grade TLV3801-Q1 variant extends the 225 ps LVDS comparator into AEC-Q100 systems such as automotive LIDAR, in-cabin optical sensing, and industrial proximity switches exposed to -40C to +125C. Because the Q1 part is pin-identical to the standard TLV3801 in the same 8-WSON package, a single PCB design serves both consumer and automotive builds. The enable pin supports power-sequenced wake-up in body-domain controllers managing multiple sensor rails.
推荐
推荐产品汇总
工程参考数据： TLV3801 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TLV3801QDSGRQ1 | TLV3501DSGR | TLV3802 |
|---|---|---|---|---|
| Package | 8-WSON (DSG) 2x2 mm | 8-WSON (DSG) 2x2 mm - same | 8-WSON (DSG) 2x2 mm - same footprint | 12-WSON - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Propagation Delay | 225 ps | 225 ps | 4.5 ns | 225 ps |
| Output Type | Complementary LVDS | Complementary LVDS | Push-pull CMOS | LVDS |
| Toggle Frequency | 3 GHz | 3 GHz | 80 MHz typ | 3 GHz |
| Supply Range | 2.7 V to 5.25 V (±1.35 V to ±2.625 V) | 2.7 V to 5.25 V | 2.7 V to 5.5 V | 2.7 V to 5.25 V |
| Enable Pin | Yes | Yes | Yes | Yes |
| Automotive Grade | No (standard part) | Yes (AEC-Q100) | No | No |
关键差异点
- 225 ps propagation delay with LVDS outputs （对比 TLV3501DSGR)
- 3 GHz toggle frequency （对比 TLV3501DSGR)
- Footprint-compatible automotive path （对比 TLV3801QDSGRQ1)
设计说明
Terminate the TLV3801 LVDS output pair with 100 ohm differential impedance at the receiver end. Keep OUT+ and OUTN traces length-matched within 5 mil and use a continuous ground reference plane beneath the pair. Because the toggle frequency reaches 3 GHz, any stub or via discontinuity will reflect and corrupt edges - avoid test-point stubs on the differential pair.
Place 0.1 uF decoupling capacitors within 2 mm of the VCC and VEE pins, with an additional 1 uF bulk capacitor per supply rail nearby. The 2x2 mm WSON keeps the die tiny, so even short supply inductance causes supply bounce during fast LVDS transitions. Use a solid ground pour connected through multiple vias to the DSG exposed ground structure per the TI layout guidelines in the TLV3801 datasheet.
Do not assume cross-brand substitutions: no widely available competitor offers an LVDS-output comparator in the same 8-WSON footprint, so BOM alternates should be restricted to the TLV3801 family. When comparing near-zero signals in split-supply mode, remember hysteresis behavior and verify input common-mode range at the actual supply voltage. Use the TLV3801EVM to validate timing performance before final layout.
合规信息
AEC-Q100 qualification applies to the TLV3801-Q1 variant (TLV3801QDSGRQ1). RoHS/lead-free status per TI product page; REACH and halogen-free status [DATA_NEEDED: REACH, halogen-free confirmation].
