MP8110DS-LF-Z - 40V High-Side Current Sense Amp | MPS
N.º da peça: MP8110DS-LF-Z ✓ AtivoMP8110DS-LF-Z Visão geral
A high-side current-sense amplifier is an instrumentation amplifier that senses the small voltage developed across a low-ohm sense resistor in a current-carrying conductor. The MP8110 converts this differential sense voltage into a proportional output voltage. This category belongs to the amplifier hierarchy: current-sense amplifier → instrumentation amplifier → analog amplifier → integrated circuit. High-side placement is especially valuable in battery-powered equipment because the monitored load ground can remain connected directly to the system ground.
Key verified characteristics include a 2.5 V to 40 V operating supply, 1.4 V to 40 V common-mode voltage range, 400 µV input offset voltage, 4 nA input bias current, 5 mA output current capability, 97 dB common-mode rejection, and an enable or shutdown function. The 12 µA typical supply current supports low-power monitoring designs. These parameters make the amplifier suitable for power paths where the measured current can range from light-load conditions to substantially higher operating levels.
The MP8110 uses a precision differential-sensing architecture to reject supply ripple and common-mode disturbances present on the high-side conductor. Its common-mode rejection of 97 dB helps preserve measurement accuracy when the monitored rail changes substantially. The wide 40 V operating and common-mode limits accommodate automotive, industrial, communications, and portable equipment rails, although the selected sense resistor and amplifier gain must still be chosen to keep the output within the usable analog range.
Typical uses include battery charge monitoring in notebook computers and cellular phones, DC/DC converter load measurement, power-path current limiting, general high-side load detection, and energy-management subsystems. The enable or shutdown function can be used to reduce consumption when continuous monitoring is unnecessary. Because the part senses above the load connection, it avoids inserting an additional ground-path element between the source and the monitored system.
The primary design consideration is selecting the sense-resistor value and amplifier gain together. Too little sense resistance produces an output signal buried in noise, while too much resistance can reduce available supply voltage and increase power loss as I²R. Layout should keep the differential traces short, matched, and away from switching nodes. Input filtering and the manufacturer’s recommended resistor and capacitor values should be used to balance response time against transient rejection.
This product page consolidates verified manufacturer and distributor information, current-sense design considerations, practical application guidance, and verified drop-in sourcing data. It is intended to help engineers compare the MP8110DS-LF-Z with an exact same-package replacement without inferring unverified electrical differences.
Alternativas drop-in para MP8110DS-LF-Z — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
1589-1730-6-ND
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MP8110DS-LF-Z Classificações máximas e características elétricas
| Product Type | Precision high-side current-sense amplifier |
| Supply Voltage Range | 2.5 V to 40 V |
| Common-Mode Input Voltage Range | 1.4 V to 40 V |
| Typical Supply Current | 12 µA |
| Input Offset Voltage | 400 µV |
| Input Bias Current | 4 nA |
| Output Current | 5 mA |
| Common-Mode Rejection Ratio | 97 dB |
| Faixa de temperatura de operação | -40 °C to +85 °C |
| Faixa de tensão de saída | 1.4 V to 40 V |
| Enable or Shutdown Function | Yes |
| Input Type | High-side differential current sensing |
| Encapsulamento | 8-pin SOIC |
| Tipo de montagem | Surface mount |
| Status RoHS | Compliant |
Guia de Configuração de Pinos do MP8110DS-LF-Z 8-pin soic
Configuração de pinos para MP8110DS-LF-Z (pacote 8-pin soic). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para MP8110DS-LF-Z.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MP8110DS-LF-Z é adequado para 6 aplicaçãos: Notebook Battery Current Monitoring, Cellular Phone Charge-Path Monitoring, Industrial DC/DC Load Measurement, Battery Protection and Power-Path Control, High-Side Load Detection, Communications Equipment Power Monitoring.
Notebook Battery Current Monitoring
The MP8110DS-LF-Z suits notebook battery and power-path monitoring because it supports a 1.4 V to 40 V common-mode range while consuming only 12 µA typically. Place it across a low-value sense resistor in the positive battery rail so the output represents current without inserting resistance into the system ground return. The 97 dB common-mode rejection helps suppress supply-ripple and load-transient components that could distort the measurement. Designers must select the sense resistor and amplifier gain so the maximum monitored current produces a valid output without clipping.
Cellular Phone Charge-Path Monitoring
For cellular-phone charge-path monitoring, the MP8110DS-LF-Z provides a compact high-side sensing solution with a 2.5 V to 40 V supply range and 1.4 V to 40 V common-mode capability. Its 12 µA typical consumption limits the burden imposed by an always-on monitor, while the enable or shutdown function can reduce consumption when monitoring is not required. The device can report proportional load current to a host controller for battery protection, thermal management, or charger diagnostics without disconnecting the load ground.
Industrial DC/DC Load Measurement
The MP8110DS-LF-Z is applicable to 24 V industrial DC/DC load measurement because its verified common-mode range extends to 40 V and its supply input supports up to 40 V. Place the sense resistor in the high-side conductor and route the differential input as a short, matched pair to minimize pickup from surrounding power stages. The 97 dB common-mode rejection helps maintain accuracy when the bus voltage changes, although the sense-resistor dissipation and output headroom must be checked against the intended load-current range.
Battery Protection and Power-Path Control
In battery protection and power-path control systems, the MP8110DS-LF-Z can provide the current-feedback signal used to detect overload, abnormal discharge, or charger activity. High-side measurement is especially useful because the sensed conductor does not force current through an added ground-path component. The device’s 400 µV input offset and 4 nA input bias current should be considered when resolving very small currents. A sufficiently large sense voltage must be obtained to keep the measurement above the effective noise and offset floor.
High-Side Load Detection
The MP8110DS-LF-Z can implement high-side load detection in portable and embedded systems where a controller must determine whether an external accessory is active. The amplifier senses the voltage generated by a series resistor and produces a proportional analog signal that can be compared with a threshold. Its 2.5 V minimum supply supports low-voltage logic systems, and the 40 V upper operating limit permits use on higher-voltage rails. The enable or shutdown function is useful when the system must periodically verify load presence.
Communications Equipment Power Monitoring
The MP8110DS-LF-Z is suitable for power monitoring in communications equipment that combines several DC loads supplied through a shared high-side bus. Its wide 1.4 V to 40 V common-mode range allows the monitored conductor to vary across substantial operating conditions, while 97 dB common-mode rejection helps reject bus disturbance coupled into the measurement. The low 12 µA typical supply current is valuable in repetitive telemetry systems. Careful routing of the Kelvin sense connections is essential in high-current switching equipment.
Dados de referência de engenharia para MP8110DS-LF-Z — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 1589-1730-6-ND |
|---|---|---|
| Product Type | Precision high-side current-sense amplifier | Equivalent MP8110DS-LF-Z distributor ordering code |
| Brand | Monolithic Power Systems | Monolithic Power Systems |
| Package | 8-SOIC | 8-SOIC - same |
| Supply Voltage Range | 2.5 V to 40 V | 2.5 V to 40 V - same features |
| Common-Mode Input Range | 1.4 V to 40 V | 1.4 V to 40 V - same features |
| Typical Supply Current | 12 µA | 12 µA - same features |
| Input Offset Voltage | 400 µV | 400 µV - same features |
| Input Bias Current | 4 nA | 4 nA - same features |
| Common-Mode Rejection Ratio | 97 dB | 97 dB - same features |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C - same features |
Principais diferenciais
- Wide high-side sensing range (vs 1589-1730-6-ND)
- Low monitoring overhead (vs 1589-1730-6-ND)
- Strong common-mode disturbance rejection (vs 1589-1730-6-ND)
Notas de projeto
Route the two sense-resistor connections as a short, tightly coupled differential pair directly to the MP8110DS-LF-Z input pins. Use the manufacturer’s recommended Kelvin-style connections and avoid sharing copper with noisy switching paths. If the sense resistor sits away from the amplifier, minimize trace area and avoid connectors, test pads, and unrelated copper in the input path. Proper layout preserves the benefit of the device’s verified 97 dB common-mode rejection.
Choose the sense resistor and output gain as a single design constraint. Estimated power loss in the sense resistor is I²R, while the amplifier output must remain inside its usable range at maximum load current. Increase resistance only after confirming that its voltage drop does not starve the downstream load. The verified 12 µA typical supply current is low, but the sense resistor can consume much more power than the amplifier during high-current operation.
Do not treat the 40 V common-mode range as permission to exceed the amplifier’s own supply rating. The MP8110DS-LF-Z uses a single 2.5 V to 40 V supply and must be protected against excessive voltage on every connected pin. Also avoid using a generic SOIC-8 current-sense amplifier as a presumed drop-in part: only 1589-1730-6-ND was explicitly verified as sharing the MP8110DS-LF-Z package and features.
Input filtering can suppress fast transients but may slow the measurement response. Follow the manufacturer’s recommended input network and place any filter components close to the amplifier. Filter capacitors must maintain stable operation and avoid excessive differential loading across the sense resistor. Validate the response against the fastest expected load transient rather than adding arbitrarily large capacitance that masks useful current-change information.
Informações de conformidade
RoHS compliance is explicitly shown in the verified JLCPCB component listing. The other compliance attributes were not stated in the supplied manufacturer or distributor data and therefore remain unknown.