OPA1641/1642/1644 SoundPLUS™ High-Performance, JFET-Input Audio OpAmps - OPA1644

OPA1644 (ACTIVE)

OPA1641/1642/1644 SoundPLUS™ High-Performance, JFET-Input Audio OpAmps

 

Description

The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications.

The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Features include 5.1-nV/√Hz noise, low THD+N (0.00005%), a low input bias current of 2 pA, and low quiescent current of 1.8 mA per channel.

These devices operate over a very wide supply voltage range of ±2.25 V to ±18 V. The OPA1641, OPA1642, and OPA1644 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions.

The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

The OPA1641, OPA1642, and OPA1644 are specified from –40°C to +85°C.

Features

  • Superior Sound Quality
  • True JFET Input Operational Amplifier
    With Low Input Bias Current
  • Low Noise: 5.1 nV/√Hz at 1 kHz
  • Ultralow Distortion: 0.00005% at 1 kHz
  • High Slew Rate: 20 V/µs
  • Unity Gain Stable
  • No Phase Reversal
  • Low Quiescent Current:
    1.8 mA per Channel
  • Rail-to-rail Output
  • Wide Supply Range: ±2.25 V to ±18 V
  • Single, Dual, and Quad Versions Available

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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
OPA1644 OPA1641 OPA1642 OPA1652 OPA1654 OPA1662 OPA1662-Q1 OPA1664
4    1    2    2    4    2    2    4   
5    5    5    4.5    4.5    3    3    3   
36    36    36    36    36    36    36    36   
11    11    11    18    18    22    22    22   
20    20    20    10    10    17    17    17   
In to V-
Out   
In to V-
Out   
In to V-
Out   
No    No    Out    Out    No   
3.5    3.5    3.5    1.5    1.5    1.5    1.5    1.5   
0    0    0    2    2    2    2    2   
1.8    1.8    1.8    2    2    1.5    1.5    1.5   
5.1    5.1    5.1    4.5    4.5    3.3    3.3    3.3   
126    126    126    110    110    100    100    100   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Automotive    Catalog   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
SOIC
TSSOP   
SOIC
VSSOP   
SOIC
VSSOP   
SOIC
SON
VSSOP   
SOIC
TSSOP   
SOIC
VSSOP   
SOIC
VSSOP   
SOIC
TSSOP   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
14SOIC: 52 mm2: 6 x 8.65(SOIC)   
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
8SOIC: 29 mm2: 6 x 4.9(SOIC)   
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
8SOIC: 29 mm2: 6 x 4.9(SOIC)   
See datasheet (SON)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
14SOIC: 52 mm2: 6 x 8.65(SOIC)   
See datasheet (SON)    8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
8SOIC: 29 mm2: 6 x 4.9(SOIC)   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
14SOIC: 52 mm2: 6 x 8.65(SOIC)   
20    20    20    100    100    1200000    1200000    1200000   
30    30    30    50    50    40    40    40   
Burr-Brown™ Audio    Burr-Brown™ Audio    Burr-Brown™ Audio    Burr-Brown™ Audio
Tiny Package   
Burr-Brown™ Audio    Burr-Brown™ Audio    N/A    Burr-Brown™ Audio   
CMOS    FET    FET    CMOS    CMOS    Bipolar    Bipolar    Bipolar   

WEBENCH® Designer OPA1644

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 36.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 85.0 °C