LM339ADRG4 - Quad Open-Collector Comparator | Texas Instruments
MPN: LM339ADRG4 ✓ Hoạt độngLM339ADRG4 Tóm tắt
An analog comparator is an integrated circuit that compares two input voltages and produces a digital output indicating which input is higher. The LM339 family belongs to the broader comparator and signal-conditioning hierarchy, where comparator ICs support threshold detection, sensing, switching, waveform shaping, and simple control loops in industrial, automotive, and consumer electronics systems.
Each LM339ADRG4 channel provides independent input comparison and an open-collector output. Open-collector outputs require an external pull-up resistor, allowing the output stage to sink current while leaving the pulled-up voltage under the system designer’s control. This architecture is useful with 5 V, 3.3 V, or other logic levels and supports wired-interface arrangements when multiple outputs share a common pull-up.
The wide supply range permits operation from a single supply or from split dual supplies, provided the total supply span remains within the device limits. The low typical supply-current drain of 0.8 mA is independent of supply voltage, which can help limit consumed power in continuously operating equipment. The common-mode input range includes ground, supporting sensing near the lower supply rail in single-supply systems.
Typical applications include industrial sensor-threshold circuits, battery and power-supply monitoring, automotive interface and control modules, window or level detection, general-purpose logic threshold conversion, and embedded systems that compare an analog measurement against a reference voltage. Its four independent channels also allow multiple comparisons to be implemented in one package while reducing board area.
When designing around the open-collector outputs, select a pull-up resistor that satisfies the required sink current, rise time, and logic-level limits. Account for input offset, common-mode range, and supply headroom when setting a switching threshold. Do not assume that an open-collector output actively drives a high voltage; the external pull-up establishes the high state.
This page combines manufacturer and distributor technical information, package-aware alternatives, comparison parameters, and practical design guidance for engineers evaluating the LM339ADRG4. It supports faster component selection while keeping procurement details, replacement constraints, and implementation considerations in one focused reference.
Bộ thay thế dễ dàng lắp đặt cho LM339ADRG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM339ADRG4 (cùng hình factor và footprint) — khác nhau ở Comparator Type, Output Type, Package, Supply Voltage Range, Differential Input Voltage Range.
LM339ADR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339ADG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339ADRE4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM339MX
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM139ADG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM339ADRG4 Tỷ lệ tối đa & tính chất điện
| Comparator Type | Quad differential comparator |
| Number of Channels | 4 channels |
| Kiểu đầu ra | Open collector |
| Supply Voltage Range | 2 V to 36 V |
| Tested Supply Voltage | 30 V |
| Response Time | 300 ns |
| Supply Current Drain | 0.8 mA typical |
| Common-Mode Input Voltage Range | Includes ground |
| Differential Input Voltage Range | ±38 V maximum rated |
| Output Compatibility | TTL, MOS, and CMOS compatible |
| Số lượng chân | 14 pins |
| Hộp | 14-SOIC, 3.90 mm width |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân LM339ADRG4 14-soic, 3.90 mm width
Cấu hình chân cho LM339ADRG4 (14-soic, 3.90 mm width gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM339ADRG4.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM339ADRG4 phù hợp cho 6 Áp dụngs: Industrial Sensor Threshold Detection, Power-Supply Monitoring, Automotive Interface and Control, Battery Voltage and Level Detection, Embedded Logic Threshold Conversion, Window and Limit Detection.
Industrial Sensor Threshold Detection
The LM339ADRG4 is well suited to industrial sensor interfaces that compare a measured voltage against a reference or limit. Its four differential channels let one 14-SOIC package implement multiple comparisons without requiring four separate comparator packages. The common-mode input range includes ground, which is useful when the sensed signal approaches the lower supply rail. Each open-collector output can sink current through an external pull-up, allowing the interface to interface with TTL, MOS, or CMOS-compatible logic. Design the reference and signal paths to remain inside the specified common-mode range, and select a pull-up value that meets both the logic threshold and required output rise time.
Được đề xuất
Power-Supply Monitoring
The LM339ADRG4 can monitor several power-related thresholds by comparing divided supply voltages against reference levels and driving discrete status indicators or digital control inputs. Its 2 V to 36 V supply range supports a broad range of industrial and automotive rail environments, while the 300 ns response time allows it to react quickly to threshold crossings. Four independent channels improve board utilization in multi-rail designs. Because the outputs are open collector, they can sink current for an LED or relay-driver stage, but they require pull-up resistors for active-high or active-low digital signaling. Include suitable input filtering and hysteresis where noisy switching nodes could otherwise cause repeated output transitions.
Được đề xuất
Automotive Interface and Control
The LM339ADRG4 can support low-speed automotive interface, warning, and control functions where four voltage comparisons are required in a compact surface-mount package. The differential input structure allows one signal to be evaluated against another, while the wide supply range accommodates systems using multiple rail voltages. Its open-collector outputs can sink status current or feed a pull-up-based control bus. For automotive production designs, verify the exact temperature grade, qualification status, transient requirements, and input protection because the general LM339A ordering code does not by itself establish automotive qualification. Robust protection and filtering should be added at connector-facing inputs where transient or ESD exposure is possible.
Được đề xuất
Battery Voltage and Level Detection
The LM339ADRG4 can implement threshold detection for battery packs, charger systems, and backup power modules by comparing scaled battery voltage signals against references. Its four channels support multiple charge, discharge, or fault thresholds in one package, helping reduce component count. The 300 ns response time is suitable for detecting sustained rail changes, while the open-collector outputs can directly sink current in a warning-indicator circuit or signal a controller through pull-up resistors. Account for the comparator's input offset and reference tolerance when defining trip points, and add hysteresis to prevent oscillation when the sensed voltage lies near a threshold. Final threshold accuracy also depends on the resistor network and reference implementation.
Được đề xuất
Embedded Logic Threshold Conversion
The LM339ADRG4 is useful in embedded systems for translating an analog or open-drain signal into a clean logic decision. A differential comparison can detect whether an external signal has crossed a defined boundary, and the open-collector output can be pulled up to the voltage required by the receiving digital circuit. Because the family supports single or dual supplies and its common-mode range includes ground, it can accommodate threshold decisions near the lower rail. Keep output rise time appropriate for the receiving device by selecting the pull-up resistor carefully. For high-speed data paths, use a dedicated high-speed comparator instead, since a 300 ns response time is intended for general-purpose thresholding rather than low-latency waveform detection.
Được đề xuất
Window and Limit Detection
The LM339ADRG4 can implement upper-limit, lower-limit, or window detection by using multiple differential channels with carefully selected references. For example, two channels can monitor opposite boundaries while another channel detects a fault or enable state. Its four-channel integration reduces package count, and the 14-SOIC surface-mount format supports compact control boards. Open-collector outputs provide flexibility for wired status buses, LED sinking, or interfacing with another logic domain. Add positive feedback or deliberate output feedback to create hysteresis and suppress chatter near a comparison threshold. The resistor tolerances, input offset, supply variation, and temperature drift should be included in the system's error budget.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM339ADRG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM339ADR | LM339ADG4 | LM339ADRE4 | LM339MX | LM139ADG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same |
| Comparator Type | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator | Quad differential comparator |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
Bảo phân biệt quan trọng
- Provides four threshold channels in one 14-SOIC package (vsLM139ADG4)
- Supports a 2 V to 36 V total supply range (vsLM139ADG4)
- Combines open-collector outputs with 300 ns response time (vsLM339ADR)
Ghi chú thiết kế
Do not treat the open-collector output as a push-pull logic output. Each output requires an external pull-up unless several outputs intentionally share a wired bus. The pull-up establishes the high voltage and controls the output rise time; too little resistance increases sink-current demand, while too much resistance produces a slower transition. Check the receiver's input-current limits, the required logic level, and the maximum output transition rate before finalizing the resistance.
Place each pull-up resistor close to the corresponding output or common pull-up node, and keep comparator input traces away from switching-power nodes and other high-current paths. Use a compact ground-return path and bypass the supply pins with local high-frequency decoupling. Although the open-collector outputs are less susceptible to source impedance than push-pull outputs, input traces remain susceptible to capacitive coupling, so use guarded routing and adequate return paths where switching nodes are present.
Design threshold crossings with hysteresis so the output does not chatter when the two inputs are nearly equal. Positive feedback through a resistor network can establish the required noise margin, while input filtering can attenuate high-frequency interference. Evaluate the complete threshold error budget with input offset, resistor tolerance, reference accuracy, supply variation, and temperature drift; do not base the switching point on the nominal circuit alone.
Thông tin tuân thủ
The general-purpose LM339A device is not identified as an AEC-Q100-qualified automotive variant. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation for the exact ordering code.