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TL064IDR

Quad low-power JFET-input op-amp, 200uA/ch, 1MHz GBW, 3.5V/us, SOIC-14

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Manufacturer Part：

TL064IDR

Package：

SOIC-14 (8.65 x 3.91mm)

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Description

Product Overview

The TL064IDR is a quad low-power JFET-input operational amplifier from Texas Instruments in SOIC-14 package. As the low-power variant of the TL074/TL084 family, it draws only 200uA per channel while maintaining 1MHz gain-bandwidth product and 3.5V/us slew rate. The JFET input stage provides 30pA typical input bias current and high input impedance, making it ideal for interfacing with high-impedance sensors in battery-powered applications.

Key Specifications

Number of Channels 4
Supply Voltage Range 7V to 36V (±3.5V to ±18V)
Quiescent Current per Channel 200uA typical
Gain-Bandwidth Product 1MHz
Slew Rate 3.5V/us
Input Offset Voltage 3mV typical, 15mV max (I-grade)
Input Bias Current 30pA typical
Input Voltage Noise 42nV/sqrt(Hz) @ 1kHz
Package SOIC-14 (8.65 x 3.91mm)
Operating Temperature -40°C to +85°C

Features

  • Ultra-low 200uA per-channel supply current
  • JFET input with 30pA bias current for high-impedance circuits
  • 1MHz GBW and 3.5V/us slew rate for general-purpose signal conditioning
  • Common-mode input range includes VCC+
  • Output short-circuit protection
  • Internal frequency compensation (no external components needed)
  • Industry-standard SOIC-14 pinout compatible with TL074/TL084

Applications

  • Battery-powered signal conditioning and filtering
  • High-impedance sensor interfaces (pH probes, photodiodes)
  • Active filters and equalizers in audio equipment
  • Portable medical instrument front-ends
  • Low-power data acquisition systems

The TL064IDR is a quad JFET-input operational amplifier from Texas Instruments in SOIC-14, offering the lowest power consumption in the TL06x/TL07x/TL08x family at only 200uA per channel. The JFET input stage provides extremely low input bias current (30pA typical) and high input impedance (10^12 ohms), making it suitable for high-impedance sensor interfaces where loading would introduce errors. The 1MHz gain-bandwidth product and 3.5V/us slew rate are adequate for most low-frequency signal conditioning, active filtering, and audio applications. The common-mode input range extends to VCC+ (a unique feature of the TL064), allowing single-supply operation with inputs near the positive rail. The I-grade (industrial) operates from -40°C to +85°C with 6mV max input offset voltage. The -DR suffix specifies SOIC-14, tape-and-reel. The TL064 is a cost-effective choice when the higher speed of the TL074 (3MHz GBW) is not needed and power consumption must be minimized.

The TL064IDR uses a JFET-input stage followed by a bipolar gain and output stage. The input stage consists of matched N-channel JFET differential pairs that convert the input voltage to a differential current. The JFET gates draw only 30pA of bias current (vs 50-100nA for bipolar inputs), preserving accuracy in high-impedance circuits. The JFET differential pair feeds a current-mirror active load that converts the differential signal to single-ended, providing the first voltage gain stage (approximately 40dB). The second gain stage is a common-emitter amplifier with an internal 18pF compensation capacitor that sets the 1MHz GBW and ensures stability at unity gain. The output stage is a class-AB push-pull emitter follower that can source and sink approximately 10mA with short-circuit protection. The 200uA/channel quiescent current (vs 700uA for TL074) is achieved by reducing the tail current in the JFET differential pair and the bias current in the gain stage. The tradeoff is lower GBW (1MHz vs 3MHz) and lower slew rate (3.5V/us vs 13V/us), but the power savings are significant in battery-operated equipment.

Pin Name Type Function
1 1OUT Output Op-amp 1 output
2 1IN- Input Op-amp 1 inverting input
3 1IN+ Input Op-amp 1 non-inverting input
4 VCC+ Power Positive supply (up to +18V)
5 2IN+ Input Op-amp 2 non-inverting input
6 2IN- Input Op-amp 2 inverting input
7 2OUT Output Op-amp 2 output
8 3OUT Output Op-amp 3 output
9 3IN- Input Op-amp 3 inverting input
10 3IN+ Input Op-amp 3 non-inverting input
11 VCC- Power Negative supply (connect to GND for single-supply use)
12 4IN+ Input Op-amp 4 non-inverting input
13 4IN- Input Op-amp 4 inverting input
14 4OUT Output Op-amp 4 output
  • Battery-powered active filters: Four op-amps in one package implement 2nd-4th order Butterworth filters at 200uA/ch total; ideal for portable ECG and EEG front-ends
  • High-impedance sensor interface: 30pA input bias current allows direct connection to pH probes and piezoelectric sensors without loading errors
  • Audio equalizer/mixer: Four channels provide independent gain stages for 4-band equalizer in portable audio equipment; 3.5V/us slew rate handles 20kHz audio
  • Single-supply signal conditioning: Common-mode range includes VCC+ simplifies single-supply design with input signals near the positive rail
Manufacturer Part Number Package Notes
Texas Instruments TL074IDR SOIC-14 3MHz GBW, 13V/us, higher speed, 700uA/ch
Texas Instruments TL084IDR SOIC-14 3MHz GBW, 13V/us, standard JFET op-amp
STMicroelectronics TL064ID SOIC-14 Pin-compatible, ST brand
Texas Instruments TLC274CDR SOIC-14 CMOS quad, 1.8MHz, 25uA/ch, RR output, TI
Microchip MCP6004T-I/ST TSSOP-14 1MHz, 100uA/ch, RR I/O, 1.8-6V, Microchip
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