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AD8422ARMZ-R7

Low-cost instrumentation amp, 10MHz, MSOP-8

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Pieza del fabricante：

AD8422ARMZ-R7

Paquete：

MSOP-8 (3x3mm)

Marca：
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Descripción

Productos

The AD8422ARMZ-R7 from Analog Devices is a low-cost instrumentation amplifier with 10MHz bandwidth, 0.15uV/C offset drift, and single-resistor gain setting in MSOP-8.

Especificaciones

Paquete MSOP-8 (3x3mm)

Características

  • See datasheet for complete specifications
  • Industry-standard package

Aplicaciones

  • Industrial control
  • Consumer electronics
  • Communication equipment
  • Power management

The AD8422ARMZ-R7 from Analog Devices is a low-cost instrumentation amplifier with 10MHz bandwidth, 0.15uV/C offset drift, and single-resistor gain setting in MSOP-8.

The AD8422ARMZ-R7 is a low-cost, high-performance instrumentation amplifier from Analog Devices in MSOP-8, with gain set by a single external resistor (RG): Gain = 1 + (19.8k / RG). Gains from 1 to 1000 are achievable: G=1 (RG open), G=10 (RG=2.2k), G=100 (RG=200), G=1000 (RG=19.8 ohm). The three-op-amp architecture provides: (1) Two input buffers (preamps) that present high impedance to the signal source and amplify the differential signal; (2) A difference amplifier that rejects the common-mode voltage and provides the single-ended output. The input offset voltage is 25uV typical (150uV max over temperature), and the input bias current is 200pA. The CMRR (common-mode rejection ratio) is 80dB at G=1 and 120dB at G>=100, critical for rejecting noise in bridge and current-sense applications. The bandwidth is 10MHz at G=1 and 2MHz at G=10, decreasing to 20kHz at G=1000. The supply current is 330uA per amplifier, and the supply voltage range is +/-2.5V to +/-18V (or 5V to 36V single-supply). The REF pin allows output level shifting: connecting REF to a DAC output enables bidirectional current measurement. The output can swing to within 1.2V of the supply rails. The AD8422 is the cost-optimized successor to the AD8221, offering similar performance at lower cost. The -ARMZ-R7 suffix specifies MSOP-8, tape-and-reel. Applications include bridge transducer amplification, medical ECG/EEG, and industrial current sensing.

Pin Nombre Tipo Función
1 RG1 Entrada Gain resistor terminal 1 (connect external resistor RG between RG1 and RG2)
2 EN- Entrada Inverting input (connects to shunt low-side or bridge output)
3 EN+ Entrada Non-inverting input (connects to shunt high-side or bridge output)
4 V- Potencia Negative supply (-2.5V to -18V, or connect to GND for single-supply)
5 REF Entrada Reference input (sets output baseline, typically connect to GND or mid-supply)
6 VOUT Salida Amplified output (VOUT = GAIN x (IN+ – IN-) + VREF)
7 V+ Potencia Positive supply (+2.5V to +18V)
8 RG2 Entrada Gain resistor terminal 2
  • Industrial control
  • Consumer electronics
  • Communication equipment
  • Power management
    • Fabricante Número de pieza Paquete Notas
    Dispositivos analógicos AD8422ARMZ-R7 MSOP-8 Same device, ADI brand
    Dispositivos analógicos AD8421ARMZ-R7 MSOP-8 Lower power version (200uA vs 330uA)
    Texas Instruments INA828AIDR SOIC-8 Low-power inst amp, 200uA, similar performance
    Dispositivos analógicos AD620ARZ SOIC-8 Classic inst amp, lower bandwidth, lower cost
    Texas Instruments INA821AIDR SOIC-8 Precision inst amp, 35uV offset, similar
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