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See Technical Specifications

INA848IDR

Ultra-low-noise, high-bandwidth instrumentation amplifier with fixed gain of 2000

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA848IDR
Datasheet:

INA848IDR Datasheet (PDF)
Amplifier Type:

Current Feedback
Number of Circuits:

1
Slew Rate:

45V/µs
-3db Bandwidth:

2.8 MHz
EDA/CAD Models:

Request Free CAD Models for INA848IDR

Email: [email protected]

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Tel: +852 95804164

INA848IDR General Description

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TIs 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.

Key Features

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

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	-
Amplifier Type	Current Feedback	Number of Circuits	1
Output Type	-	Slew Rate	45V/µs
-3db Bandwidth	2.8 MHz	Current - Input Bias	25 nA
Voltage - Input Offset	10 µV	Current - Supply	6.2mA
Current - Output / Channel	30 mA	Voltage - Supply Span (Min)	8 V
Voltage - Supply Span (Max)	36 V	Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Base Product Number	INA848
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) (V/°C)	0.00000045
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	feature-number-of-channels-per-chip	1
feature-rail-to-rail		feature-typical-gain-bandwidth-product-mhz
feature-maximum-input-offset-voltage-mv	0.035@±15V	feature-maximum-operating-supply-voltage-v	±18\|36
feature-maximum-input-bias-current-ua	0.05@±15V	feature-packaging	Tape and Reel
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified		feature-esd-protection
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-auto-motive	No
feature-p-pap	No	feature-eccn-code	EAR99
feature-svhc		feature-svhc-exceeds-threshold	No