LT1028 - Ultra Low Noise Precision High Speed Op Amps

Features

• Voltage Noise
  1.1nV/rt Hz Max. at 1kHz
  0.85nV/rt Hz Typ. at 1kHz
  1.0nV/ rtHz Typ. at 10Hz
• 35nV_P-P Typ., 0.1Hz to 10Hz
• Gain-Bandwidth Product
  LT1028: 50MHz Min.
  LT1128: 13MHz Min.
• Slew Rate
  LT1028: 11V/µs Min.
  LT1128: 5V/µs Min.
• Offset Voltage: 40µV Max.
• Drift with Temperature: 0.8µV/°C Max.
• Voltage Gain: 7 Million Min.
• Voltage and Current Noise 100% Tested
• Available in 8-Pin SO Package

Typical Application

Description

The LT1028 (gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/Rt.Hz 1kHz noise, 1.0nV/Rt.Hz 10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters (0.1µV/°C drift, 10µV offset voltage, 30 million voltage gain). Although the LT1028/LT1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 25nA.

The LT1028/LT1128’s voltage noise is less than the noise of a 50 Ohm resistor. Therefore, even in very low source impedance transducer or audio amplifier applications, the LT1028/LT1128’s contribution to total system noise will be negligible.

Packaging

DIP-8,SO-8,SOW-16

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LT1028ACN8	PDIP	8	C	$8.75	$7.20	View
LT1028ACN8#PBF	PDIP	8	C	$8.75	$7.20	View
LT1028CN8	PDIP	8	C	$5.75	$4.75	View
LT1028CN8#PBF	PDIP	8	C	$5.75	$4.75	View
LT1028CS8	SO	8	C	$5.75	$4.75	View
LT1028CS8#PBF	SO	8	C	$5.75	$4.75	View
LT1028CS8#TR	SO	8	C		$4.81	View
LT1028CS8#TRPBF	SO	8	C		$4.81	View
LT1028CSW	SO	16	C	$6.58	$5.20	View
LT1028CSW#PBF	SO	16	C	$6.58	$5.20	View
LT1028CSW#TR	SO	16	C		$5.26	View
LT1028CSW#TRPBF	SO	16	C		$5.26	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

• Low Noise Frequency Synthesizers
• High Quality Audio
• Infrared Detectors
• Accelerometer and Gyro Amplifiers
• 350 ohms Bridge Signal Conditioning
• Magnetic Search Coil Amplifiers
• Hydrophone Amplifiers

Simulate

Linear Technology offers several options for simulating our high performance operational amplifiers.

• Download the SPICE model for the LT1028 (or right click and select "Save Target As" to save the file to disk)
  
• Download SPICE models for the complete collection of LTC op amps
  
  
• LTSpice / SwitcherCAD III is a powerful FREE circuit simulator and schematic capture program. Included in this download are LTSpice, Macro Models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.  Download it now!