TMUX7208 - 44V Latch-Up Immune 8:1 MUX | Texas Instruments
MPN: TMUX7208 ✓ Hoạt độngTMUX7208 Tóm tắt
A multiplexer (MUX) is a device that selects one of several analog or digital input signals and forwards it to a single output line. The TMUX7208 is an analog multiplexer, specifically an 8:1 configuration, meaning it routes one of eight input channels to a common output based on the state of three address pins and an enable pin. This functionality is essential in data acquisition systems, test equipment, and industrial automation where multiple sensors or signals need to be sampled sequentially by a single ADC or measurement circuit.
Key features of the TMUX7208 include latch-up immunity, which prevents damage from overvoltage or ESD events, and 1.8V logic-compatible inputs, allowing direct interface with low-voltage microcontrollers without level shifters. The device supports high current up to 300mA (max), making it robust for various loads. The low on-resistance and charge injection ensure minimal signal distortion and glitches during switching.
The TMUX7208 uses a precision architecture with a break-before-make switching mechanism, preventing momentary shorting between channels. The device also features an enable pin that, when low, disconnects all channels, providing a high-impedance state. This is useful for power-down or isolation scenarios. The wide supply range and latch-up immunity make it ideal for industrial and automotive environments where voltage transients are common.
Typical applications include data acquisition systems, test and measurement equipment, industrial process control, and battery monitoring systems. The TMUX7208 can be used to multiplex multiple sensor inputs into a single ADC, reducing component count and cost. Its high-voltage capability allows direct connection to 24V industrial buses without additional level shifting.
When designing with the TMUX7208, ensure that the supply voltages are within the specified range and that the input signals do not exceed the supply rails. Proper decoupling capacitors on the supply pins are recommended to minimize noise. The address and enable pins should be driven with logic levels compatible with 1.8V to 5V, as the device is 1.8V logic compatible.
Bộ thay thế dễ dàng lắp đặt cho TMUX7208 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TMUX7208PWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TMUX7208M
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TMUX7209PWR
⚡ Đồng gói📋 Tham chiếu thay thế (không có trong danh mục)
ADG708
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX4781
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TMUX7208 Thông số kỹ thuật
| Configuration | 8:1 Single Channel |
| Number of Channels | 1 |
| On-Resistance (Typical) | 4 Ω |
| On-Resistance (Max) | 5.4 Ω |
| Charge Injection | 3 pC |
| Single Supply Voltage Range | 4.5 V to 44 V |
| Dual Supply Voltage Range | ±4.5 V to ±22 V |
| Asymmetric Supply Support | Yes (e.g., VDD=12V, VSS=-5V) |
| Maximum Continuous Current | 300 mA |
| Logic Compatibility | 1.8 V compatible |
| Latch-Up Immunity | Yes |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 16-TSSOP (PW) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân TMUX7208
| Chân 1 | S1 — Input channel 1 |
| Chân 2 | S2 — Input channel 2 |
| Chân 3 | S3 — Input channel 3 |
| Chân 4 | S4 — Input channel 4 |
| Chân 5 | S5 — Input channel 5 |
| Chân 6 | S6 — Input channel 6 |
| Chân 7 | S7 — Input channel 7 |
| Chân 8 | S8 — Input channel 8 |
| Chân 9 | GND — Ground |
| Chân 10 | EN — Enable (active high) |
| Chân 11 | A0 — Address bit 0 |
| Chân 12 | A1 — Address bit 1 |
| Chân 13 | A2 — Address bit 2 |
| Chân 14 | D — Common output |
| Chân 15 | VSS — Negative supply (or GND in single supply) |
| Chân 16 | VDD — Positive supply |
Ứng dụng tiêu biểu
TMUX7208 phù hợp cho 6 Áp dụngs: Data Acquisition Systems, Test and Measurement Equipment, Industrial Process Control, Battery Monitoring Systems, Audio Signal Routing, Automotive Electronics.
Data Acquisition Systems
The TMUX7208 is ideal for data acquisition systems where multiple analog sensors need to be sampled by a single ADC. Its low on-resistance (4Ω) and low charge injection (3pC) ensure accurate signal transfer with minimal distortion. The wide supply range (up to 44V) allows direct connection to industrial sensors without level shifting. The 1.8V logic compatibility simplifies interface with modern microcontrollers. In a typical system, the TMUX7208 connects eight sensor outputs to one ADC input, reducing component count and cost. The break-before-make switching prevents channel crosstalk, ensuring reliable measurements.
Được đề xuất
Test and Measurement Equipment
In test and measurement equipment, the TMUX7208 routes multiple test points to a single measurement instrument. Its high voltage capability (up to 44V) allows direct switching of power rails and signals. The latch-up immunity ensures robustness against ESD and overvoltage events, which are common in test environments. The low charge injection minimizes glitches that could affect measurement accuracy. The device's 300mA current capability supports driving loads in automated test equipment. The 16-TSSOP package is compact, saving board space in dense test systems.
Được đề xuất
Industrial Process Control
The TMUX7208 is well-suited for industrial process control systems that monitor multiple sensors such as temperature, pressure, and flow. Its wide supply range (4.5V to 44V) accommodates 24V industrial buses directly. The operating temperature range of -40°C to +125°C ensures reliable operation in harsh environments. The latch-up immunity protects against voltage transients from inductive loads. The 1.8V logic compatibility allows direct connection to low-power microcontrollers, reducing power consumption. The low on-resistance ensures minimal signal loss over long cable runs.
Được đề xuất
Battery Monitoring Systems
In battery monitoring systems, the TMUX7208 multiplexes voltage and temperature sense lines from multiple battery cells to a single monitoring IC. Its high voltage rating (up to 44V) is essential for monitoring series-connected cells. The low charge injection prevents voltage spikes that could damage sensitive measurement circuits. The 1.8V logic compatibility allows direct interface with battery management ICs. The device's low on-resistance ensures accurate voltage measurements across the cell stack. The wide temperature range supports operation in automotive and industrial battery packs.
Được đề xuất
Audio Signal Routing
The TMUX7208 can be used in audio equipment to route multiple audio sources to a single output. Its low charge injection (3pC) minimizes audible clicks and pops during switching. The low on-resistance (4Ω) ensures minimal signal attenuation. The wide supply range allows operation from ±15V rails commonly used in audio circuits. The break-before-make switching prevents shorting between channels, which could cause distortion. The device's high current capability (300mA) can drive headphone loads directly in some applications.
Được đề xuất
Automotive Electronics
The TMUX7208 is suitable for automotive applications such as battery management, sensor multiplexing, and infotainment systems. Its wide supply range (up to 44V) handles automotive battery voltages (12V/24V). The operating temperature range of -40°C to +125°C meets automotive requirements. The latch-up immunity provides robustness against load-dump transients. The 1.8V logic compatibility allows direct connection to automotive microcontrollers. The device's low on-resistance ensures efficient signal routing in power-sensitive systems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TMUX7208 — 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 | TMUX7208PWR | TMUX7208M | TMUX7209PWR | ADG708 | MAX4781 |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP | 16-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Maxim Integrated |
| Configuration | 8:1 Single | 8:1 Single | 8:1 Single | 4:1 Dual | 8:1 Single | 8:1 Single |
| On-Resistance (Typ) | 4 Ω | 4 Ω | 4 Ω | 4 Ω | 4.5 Ω | 1 Ω |
| Supply Voltage (Single) | 4.5V to 44V | 4.5V to 44V | 4.5V to 44V | 4.5V to 44V | 2.7V to 5.5V | 2.7V to 12V |
| Charge Injection | 3 pC | 3 pC | 3 pC | 3 pC | 5 pC | 5 pC |
| Latch-Up Immunity | Yes | Yes | Yes | Yes | No | No |
| Logic Compatibility | 1.8V | 1.8V | 1.8V | 1.8V | 2.7V | 2.7V |
Bảo phân biệt quan trọng
- Latch-up immunity (vsADG708)
- Wide supply voltage range (vsMAX4781)
- 1.8V logic compatibility (vsADG708)
Ghi chú thiết kế
Ensure the supply voltages (VDD and VSS) are within the specified range (4.5V to 44V single, ±4.5V to ±22V dual). Use 0.1µF decoupling capacitors close to the VDD and VSS pins to filter high-frequency noise. For asymmetric supplies, ensure the total voltage difference does not exceed 44V.
Place the TMUX7208 close to the ADC or load to minimize trace length and parasitic capacitance. Use a solid ground plane under the device to reduce noise. For high-frequency signals, consider impedance-controlled traces and keep the address lines short to avoid crosstalk.
Do not exceed the absolute maximum ratings for input voltages. Ensure the address and enable pins are not left floating; tie them to known logic levels. When using dual supplies, ensure VSS is properly connected to the negative rail, not left unconnected. Verify the pinout against the datasheet before PCB layout.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider TMUX7208-Q1 if available.
