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INA849DGKT

Ultra-low noise (1 nV/√Hz), high-speed (28 MHz, 35 V/μ), precision (35 μV) instrumentation amplifier

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA849DGKT
Datasheet:

INA849DGKT Datasheet (PDF)
Amplifier Type:

Instrumentation
Number of Circuits:

1
Slew Rate:

35V/µs
-3db Bandwidth:

1.25 MHz
EDA/CAD Models:

Request Free CAD Models for INA849DGKT

Email: [email protected]

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Tel: +852 95804164

INA849DGKT General Description

The INA849 is an ultra-low noise instrumentation amplifier optimized for maximum accuracy in high-resolution systems and operation over a wide single-supply or dual-supply range. The device offers significantly lower input bias current than competitors as a result of super-beta input transistors. A state-of-the-art manufacturing process provides exceptionally low voltage noise, input offset voltage, and offset voltage drift.

Precisely matched integrated resistors provide a high, 92-dB (G = 1) common-mode rejection across the full input common-mode range. A single external resistor sets any gain from 1 to 10,000. The current-feedback topology of the INA849 provides wide bandwidth at higher gains for very-small, fast-moving signals. For example, the device provides 8 MHz of bandwidth at G = 100, and 28 MHz at a G = 1, with a fast 0.4-µs settling time (0.01%) for directly driving high-resolution, analog-to-digital converters (ADCs).

Key Features

Ultra-low noise: 1-nV/√Hz input voltage noise (typical)
Precision super-beta input performance:
- Low offset voltage: 35 µV (maximum)
- Low offset voltage drift: 0.4 µV/°C (maximum)
- Low input bias current: 20 nA (maximum)
- Low gain drift: 5 ppm/°C for G = 1 (maximum)
Bandwidth: 28 MHz (G = 1), 8 MHz (G = 100)
Slew rate: 35 V/µs
Common-mode rejection: 120 dB (minimum) for maximum gain
Supply range:
- Single supply: 8 V to 36 V
- Dual supply: ±4 V to ±18 V
Specified temperature range: –40°C to +125°C
Packages: 8-pin SOIC and VSSOP

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	-
Amplifier Type	Instrumentation	Number of Circuits	1
Output Type	-	Slew Rate	35V/µs
-3db Bandwidth	1.25 MHz	Current - Input Bias	20 nA
Voltage - Input Offset	10 µV	Current - Supply	6.2mA
Current - Output / Channel	34 mA	Voltage - Supply Span (Min)	8 V
Voltage - Supply Span (Max)	36 V	Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Number of channels	1
Vs (max) (V)	36	Vs (min) (V)	8
Input offset (±) (max) (µV)	35	Voltage gain (min) (V/V)	1
Voltage gain (max) (V/V)	10000	Noise at 1 kHz (typ) (nV√Hz)	1
Features	Current Feedback, High speed, Super-beta, Ultra-low noise	CMRR (min) (dB)	120
Input offset drift (±) (max) (V/°C)	0.0000004	Input bias current (±) (max) (nA)	20
Iq (typ) (mA)	6.2	Bandwidth at min gain (typ) (MHz)	28
Gain error (±) (max) (%)	0.1	Operating temperature range (°C)	-40 to 125
Rating	Catalog	Type	Resistor
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)	0.06
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	0.02@±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	No
feature-svhc-exceeds-threshold	No