Ultra-Low Input Current Amplifier - LMC6001

LMC6001 (ACTIVE)

Ultra-Low Input Current Amplifier

 

Recommended alternative parts

  • LMP7701  -  Higher Bandwidth, Lower Voltage Offset, Better CMRR
  • LMP7721  -  Lower Input Current

Description

Featuring 100% tested input currents of 25 fA maximum, low operating power, and ESD protection of 2000 V, the LMC6001 device achieves a new industry benchmark for low input current operational amplifiers. By tightly controlling the molding compound, Texas Instruments is able to offer this ultra-low input current in a lower cost molded package.

To avoid long turnon settling times common in other low input current op amps, the LMC6001A is tested three times in the first minute of operation. Even units that meet the 25-fA limit are rejected if they drift.

Because of the ultra-low input current noise of 0.13 fA/√Hz, the LMC6001 can provide almost noiseless amplification of high resistance signal sources. Adding only 1 dB at 100 kΩ, 0.1 dB at 1 MΩ and 0.01 dB or less from 10 MΩ to 2,000 MΩ, the LMC6001 is an almost noiseless amplifier.

The LMC6001 is ideally suited for electrometer applications requiring ultra-low input leakage such as sensitive photodetection transimpedance amplifiers and sensor amplifiers. Because input referred noise is only 22 nV/√Hz, the LMC6001 can achieve higher signal to noise ratio than JFET input type electrometer amplifiers. Other applications of the LMC6001 include long interval integrators, ultra-high input impedance instrumentation amplifiers, and sensitive electrical-field measurement circuits.

Features

  • (Maximum Limit, 25°C Unless Otherwise Noted)
  • Input Current (100% Tested): 25 fA
  • Input Current Over Temperature: 2 pA
  • Low Power: 750 µA
  • Low VOS: 350 µV
  • Low Noise: 22 nV/√Hz at 1 kHz Typical

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Parametrics Compare all products in Precision Op Amps

 
Number of Channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
GBW (Typ) (MHz)
Slew Rate (Typ) (V/us)
Rail-to-Rail
Vos (Offset Voltage @ 25C) (Max) (mV)
Offset Drift (Typ) (uV/C)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
CMRR (Typ) (dB)
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Input Bias Current (Max) (pA)
Output Current (Typ) (mA)
Additional Features
Architecture
LMC6001
1   
4.5   
15.5   
1.3   
1.5   
In to V-
Out   
0.35   
2.5   
0.45   
22   
83   
Catalog   
-40 to 85   
DIESALE
PDIP   
See datasheet (PDIP)   
0.025   
21   
N/A   
CMOS   

Featured tools and software

WEBENCH® Designer LMC6001

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 4.5 to 15.5 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 85.0 °C