Analog DevicesAD8410AR-EVALZIntegrierte Verstärkerschaltung, Entwicklungsplatinen und -kits

The AD8410A/AD8411A device features an initial gain of 20 V/V, with a 2.2 MHz bandwidth with a maximum ±0.13% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. It has a minimum DC common-mode rejection ratio (CMRR) of 123 dB from −2 V to +70 V, and performs bidirectional current measurements across a shunt resistor in a variety of industrial and automotive applications.

The AD8410A offers breakthrough performance throughout the −40°C to +125°C temperature range. The device features an in-package trim core, which leads to a typical offset drift of ±0.21 μV/°C (based on Box Method, see Figure 56) throughout the operating temperature range and the common-mode voltage range without the need for chopping and autozero clocks (which could lead to intermodulation in the application).

The AD8410A includes circuitry to achieve a wide input common-mode range and balanced input bias currents, regardless of input differential voltage or common-mode voltage, and circuitry to achieve ultra-low CMRR drift. The device also includes circuitry to enable output accuracy in the presence of pulse-width modulation (PWM) type input common-mode voltages. The AD8410A is available in 8-lead, SOIC_N package and 8-lead, MSOP package.

Key Features and Benefits

• •  2.2 MHz small signal, −3 dB bandwidth
• •  In-package Trim Core (DigiTrim™)
• •  Precision without chopping and/or autozero
• •  Typical ±0.21 μV/°C offset drift
• •  Maximum ±200 μV voltage-offset over temperature range
• •  Typical DC CMRR: 142 dB
• •  Typical AC CMRR at 50 kHz: 96 dB
• •  Wide common-mode input voltage range
• •  −2 V to +70 V, continuous operation
• •  −20 V to +85 V, continuous survival
• •  Initial gain: 20 V/V
• •  Wide operating temperature range: −40°C to +125°C
• •  Bidirectional operation
• •  2.9 V to 5.5 V power-supply operating range
• •  Available in 8-lead, SOIC_N package and 8-lead, MSOP package
• •  AEC-Q100 qualified for automotive applications

Applications

• •  In-phase or High-side current sensing in
• •  Motor control in BLDC motors, Low-inductance motors
• •  Bidirectional 48 V to 12 V DC-DC converters
• •  Solenoid controls
• •  Power rail monitoring
• •  Low-side current sensing

Evaluation Board

The AD8410A/AD8411A can be evaluated with the EVAL-AD8410A.

Block Diagrams and Tables