INA848

現行

具有 2000 固定增益的超低雜訊、高頻寬儀器放大器

立即訂購

產品規格表

document-pdfAcrobat INA848 Ultra-Low-Noise (1.5 nV/√Hz), High-Bandwidth Instrumentation Amplifier With Fixed Gain of 2000 datasheet (英文) PDF | HTML

INA848

現行

產品規格表

立即訂購

產品詳細資料

Number of channels

1

Vs (max) (V)

36

Vs (min) (V)

8

Input offset (±) (max) (µV)

35

Voltage gain (min) (V/V)

2000

Voltage gain (max) (V/V)

2000

Noise at 1 kHz (typ) (nV√Hz)

1.5

Features

Current Feedback, High speed, Super-beta, Ultra-low noise

CMRR (min) (dB)

132

Input offset drift (±) (max) (µV/°C)

0.45

Input bias current (±) (max) (nA)

50

Iq (typ) (mA)

6.2

Bandwidth at min gain (typ) (MHz)

2.8

Gain error (±) (max) (%)

0.15

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Type

Fixed Gain

Gain nonlinearity (±) (max) (%)

0.001

Output swing headroom (to negative supply) (typ) (V)

0.15

Output swing headroom (to positive supply) (typ) (V)

-0.15

Input common mode headroom (to negative supply) (typ) (V)

2.5

Input common mode headroom (to positive supply) (typ) (V)

-2.5

Noise at 0.1 Hz to 10 Hz (typ) (µVPP)

0.055

Number of channels

1

Vs (max) (V)

36

Vs (min) (V)

8

Input offset (±) (max) (µV)

35

Voltage gain (min) (V/V)

2000

Voltage gain (max) (V/V)

2000

Noise at 1 kHz (typ) (nV√Hz)

1.5

Features

Current Feedback, High speed, Super-beta, Ultra-low noise

CMRR (min) (dB)

132

Input offset drift (±) (max) (µV/°C)

0.45

Input bias current (±) (max) (nA)

50

Iq (typ) (mA)

6.2

Bandwidth at min gain (typ) (MHz)

2.8

Gain error (±) (max) (%)

0.15

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Type

Fixed Gain

Gain nonlinearity (±) (max) (%)

0.001

Output swing headroom (to negative supply) (typ) (V)

0.15

Output swing headroom (to positive supply) (typ) (V)

-0.15

Input common mode headroom (to negative supply) (typ) (V)

2.5

Input common mode headroom (to positive supply) (typ) (V)

-2.5

Noise at 0.1 Hz to 10 Hz (typ) (µVPP)

0.055

SOIC (D)

8

29.4 mm² (4.9 mm × 6 mm)

Fixed gain of 2000 V/V
Access to internal nodes for filtering
Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
Precision super-beta input performance:
- Low offset voltage: 35 µV (maximum)
- Low offset voltage drift: 0.45 µV/°C (maximum)
- Low input bias current: 25 nA (typical)
- Low gain drift: 5 ppm/°C (maximum)
Bandwidth: 2.8 MHz
Slew rate: 45 V/µs
Common-mode rejection: 132 dB (minimum)
Supply range:
- Single supply: 8 V to 36 V
- Dual supply: ±4 V to ±18 V
Specified temperature range: –40°C to +125°C
Package: 8-pin SOIC

Fixed gain of 2000 V/V
Access to internal nodes for filtering
Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
Precision super-beta input performance:
- Low offset voltage: 35 µV (maximum)
- Low offset voltage drift: 0.45 µV/°C (maximum)
- Low input bias current: 25 nA (typical)
- Low gain drift: 5 ppm/°C (maximum)
Bandwidth: 2.8 MHz
Slew rate: 45 V/µs
Common-mode rejection: 132 dB (minimum)
Supply range:
- Single supply: 8 V to 36 V
- Dual supply: ±4 V to ±18 V
Specified temperature range: –40°C to +125°C
Package: 8-pin SOIC

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

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