Enhanced JFET Low-Power Precision Operational Amplifier - TL031


Enhanced JFET Low-Power Precision Operational Amplifier



The TL03x series of JFET-input operational amplifiers offer improved dc and ac characteristics over the TL06x family of low-power BiFET operational amplifiers. On-chip zener trimming of offset voltage yields precision grades as low as 1.5 mV (TL031A) for greater accuracy in dc-coupled applications. The Texas Instruments improved BiFET process and optimized designs also yield improved bandwidths and slew rates without increased power consumption. The TL03x devices are pin-compatible with the TL06x and can be used to upgrade existing circuits or for optimal performance in new designs.

BiFET operational amplifiers offer the inherently higher input impedance of the JFET-input transistors without sacrificing the output drive associated with bipolar amplifiers. This higher input impedance makes the TL3x amplifiers better suited for interfacing with high-impedance sensors or very low-level ac signals. These devices also feature inherently better ac response than bipolar or CMOS devices having comparable power consumption.

The TL03x family has been optimized for micropower operation, while improving on the performance of the TL06x series. Designers requiring significantly faster ac response should consider the Excalibur™ TLE206x family of low-power BiFET operational amplifiers.

Because BiFET operational amplifiers are designed for use with dual power supplies, care must be taken to observe common-mode input-voltage limits and output swing when operating from a single supply. DC biasing of the input signal is required, and loads should be terminated to a virtual-ground node at midsupply. The TI TLE2426 integrated virtual-ground generator is useful when operating BiFET amplifiers from single supplies.

The TL03x devices are fully specified at ±15 V and ±5 V. For operation in low-voltage and/or single-supply systems, the TI LinCMOS families of operational amplifiers (TLC prefix) are recommended. When moving from BiFET to CMOS amplifiers, particular attention should be paid to slew rate, bandwidth requirements, and output loading.

The C-suffix devices are characterized for operation from 0°C to 70°C. The I-suffix devices are characterized for operation from –40°C to 85°C. The M-suffix devices are characterized for operation over the full military temperature range of –55°C to 125°C.


  • Direct Upgrades for the TL06x Low-Power BiFETs
  • Low Power Consumption . . . 6.5 mW/Channel Typ
  • On-Chip Offset-Voltage Trimming for Improved DC Performance (1.5 mV, TL031A)
  • Higher Slew Rate and Bandwidth Without Increased Power Consumption
  • Available in TSSOP for Small Form-Factor Designs

Excalibur is a trademark of Texas Instruments.

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Parametrics Compare all products in General-Purpose 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)
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Offset Drift (Typ) (uV/C)
Additional Features
Input Bias Current (Max) (pA)
CMRR (Typ) (dB)
Output Current (Typ) (mA)
TL031 TL032 TL032A TL034 TL034A
1    2    2    4    4   
10    10    10    10    10   
30    30    30    30    30   
1.1    1.1    1.1    1.1    1.1   
2.9    2.9    2.9    2.9    2.9   
In to V+    In to V+    In to V+    In to V+    In to V+   
1.5    1.5    0.8    4    1.5   
0.217    0.217    0.217    0.217    0.217   
41    41    41    41    41   
Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85
0 to 70   
-40 to 85
0 to 70   
-40 to 85
0 to 70   
-40 to 85
0 to 70   
-40 to 85
0 to 70   
See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)   
4.3    9.7    9.7    10.9    10.9   
N/A    N/A    N/A    N/A    N/A   
200    200    200    200    200   
94    94    94    94    94   
8    8    8    8    8   
FET    FET    FET    FET    FET   

WEBENCH® Designer TL031

Amplifier Topology
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 10.0 to 36.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = 0.0 °C
Maximum Temperature = 70.0 °C