TI LMP92064SDE/NOPB

LMP92064 is a precision low-side digital current sensor and voltage monitor with a digital SPI interface. This analog front end (AFE) includes a precision current sense amplifier and a buffered voltage channel for measuring the load current through a shunt resistor and the supply voltage of the load, respectively. The device simultaneously samples the current and voltage channels through independent 125kSps, 12-bit ADC converters to enable highly accurate power calculations in unidirectional sensing applications. The LMP92064 provides a 2.048V internal reference to the ADC, eliminating the need for an external reference while reducing component count and saving board space. The host can communicate with the LMP92064 via a 4-wire SPI interface at speeds up to 20MHz. This high-speed SPI interface allows users to leverage higher-bandwidth ADCs to capture rapidly changing signals. In addition, the 4-wire interface features dedicated unidirectional input and output lines, enabling easy connection of digital isolators in applications requiring isolation. The LMP92064 operates from a single 4.5V to 5.5V supply and features a separate digital supply pin. The LMP92064 is available in a 16-pin 5mm x 4mm WSON package and is rated for a temperature range of -40°C to 105°C.

• 2 × 12-bit synchronous sampling ADCs – Conversion rate: 125kSps (min)
• 12-bit current sensing channel
• Input referred offset voltage: ±15μV
• Common-mode voltage range: -0.2V to 2V
• Maximum differential input voltage: 75mV
• Fixed gain: 25V/V
• Gain error: ±0.75% (max)
• Bandwidth (–3dB): 70kHz
• DC PSRR: 100dB
• DC CMRR: 110dB
• 12-bit voltage channel
• INL: ±1 LSB
• Offset error: ±2mV (max)
• Gain error: ±0.75% (max)
• Maximum input voltage: 2.048V
• Bandwidth: 100kHz
• Internal voltage reference
• SPI frequency: up to 20MHz
• Temperature range: -40°C to 105°C
• 16-pin WSON package

• Enterprise servers
• Telecommunications
• Power management