OPA322 (ACTIVE)

20MHz Low-Noise 1.8V RRIO CMOS Operational Amplifier With Shutdown

 

Special note

Shutdown version available: See orderable part number OPA322SAIDBV. In shutdown, Iq =0.1uA/ch

Description

The OPAx322x series consists of single, dual, and quad-channel CMOS operational amplifiers featuring low noise and rail-to-rail inputs and outputs optimized for low-power, single-supply applications. Specified over a wide supply range of 1.8 V to 5.5 V, the low quiescent current of only 1.5 mA per channel makes these devices well-suited for power-sensitive applications.

The combination of very low noise (8.5 nV√Hz at 1 kHz), high-gain bandwidth (20 MHz), and fast slew rate (10 V/µs) make the OPAx322x family ideal for a wide range of applications, including signal conditioning and sensor amplification requiring high gains. Featuring low THD+N, the OPAx322x series is also excellent for consumer audio applications, particularly for single-supply systems.

The OPAx322S models include a shutdown mode that allow the amplifiers to be switched from normal operation to a standby current that is typically less than 0.1 µA.

The OPA322 (single version) is available in 5-pin SOT-23 and 6-pin SOT-23, while the OPA2322 (dual version) is offered in 8-pin VSSOP, 10-pin VSSOP, 8-pin SOIC, and 8-pin SON packages. The quad version OPA4322 comes in 14-pin TSSOP and 16-pin TSSOP packages. All versions are specified for operation from –40°C to +125°C.

Features

  • Gain Bandwidth: 20 MHz
  • Low Noise: 8.5 nV√Hz at 1 kHz
  • Slew Rate: 10 V/µs
  • Low THD+N: 0.0005%
  • Rail-to-Rail I/O
  • Offset Voltage: 2 mV (maximum)
  • Supply Voltage: 1.8 V to 5.5 V
  • Supply Current: 1.5 mA/ch
    • Shutdown: 0.1 µA/ch
  • Unity-Gain Stable
  • Small Packages:
    • SOT-23, SON, VSSOP, TSSOP

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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)
Rail-to-Rail
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Offset Drift (Typ) (uV/C)
Features
Input Bias Current (Max) (pA)
CMRR (Typ) (dB)
Output Current (Typ) (mA)
Architecture
OPA322 OPA2322 OPA4322
1    2    4   
1.8    1.8    1.8   
5.5    5.5    5.5   
20    20    20   
10    10    10   
In
Out   
In
Out   
In
Out   
2    2    2   
1.6    1.5    1.4   
8.5    8.5    8.5   
Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125   
SOT-23
SOT-23   
SOIC
SON
VSSOP
VSSOP   
TSSOP
TSSOP   
5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)
6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)   
8SOIC: 29 mm2: 6 x 4.9(SOIC)
See datasheet (SON)
10VSSOP: 15 mm2: 4.9 x 3(VSSOP)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)   
1.8    1.8    1.8   
Shutdown    Shutdown
Small Size   
N/A   
10    10    10   
100    100    100   
65    65    65   
CMOS    CMOS    CMOS   

Other qualified versions of OPA322

Version Part Number Definition
Automotive OPA322-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

WEBENCH® Designer OPA322

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 1.8 to 5.5 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 125.0 °C