SBOS618I December   2013  – May 2018 OPA172 , OPA2172 , OPA4172

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      JFET-Input Low-Noise Amplifier
      2.      Superior THD Performance
  4. 4 Revision History
  5. 5 Device Comparison
    1. 5.1 Device Comparison
    2. 5.2 Device Family Comparison
  6. 6 Pin Configuration and Functions
    1.     Pin Functions: OPA172
    2.     Pin Functions: OPA2172 and OPA4172
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information: OPA172
    5. 7.5 Thermal Information: OPA2172
    6. 7.6 Thermal Information: OPA4172
    7. 7.7 Electrical Characteristics
    8. 7.8 Typical Characteristics: Table of Graphs
    9. 7.9 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 EMI Rejection
      2. 8.3.2 Phase-Reversal Protection
      3. 8.3.3 Capacitive Load and Stability
    4. 8.4 Device Functional Modes
      1. 8.4.1 Common-Mode Voltage Range
      2. 8.4.2 Electrical Overstress
      3. 8.4.3 Overload Recovery
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Capacitive Load Drive Solution Using an Isolation Resistor
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Bidirectional Current Source
      3. 9.2.3 JFET-Input Low-Noise Amplifier
  10. 10Power-Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 TINA-TI (Free Software Download)
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.7 Electrical Characteristics

At TA = +25°C, VS = ±2.25 V to ±18 V, VCM = VOUT = VS / 2, and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
VOS Input offset voltage ±0.2 ±1 mV
TA = –40°C to +125°C ±1.15
dVOS/dT Drift TA = –40°C to +125°C OPA172, OPA4172 ±0.3 ±1.5 µV/°C
OPA2172 ±1.8
PSRR vs power supply TA = –40°C to +125°C ±1 ±3 µV/V
Channel separation, dc At dc 5 µV/V
INPUT BIAS CURRENT
IB Input bias current ±8 ±15 pA
TA = –40°C to +125°C ±14 nA
TA = –40°C to +125°C OPA2172IDGK ±18
OPA41721PW
IOS Input offset current ±2 ±15 pA
TA = –40°C to +125°C OPA172, OPA4172 ±1 nA
OPA2172 ±3
NOISE
En Input voltage noise f = 0.1 Hz to 10 Hz 2.5 µVPP
en Input voltage noise density f = 100 Hz 12 nV/√Hz
f = 1 kHz 7
in Input current noise density f = 1 kHz 1.6 fA/√Hz
INPUT VOLTAGE
VCM Common-mode voltage range(1) (V–) – 0.1 V (V+) – 2 V V
CMRR Common-mode rejection ratio VS = ±2.25 V, (V–) – 0.1 V < VCM< (V+) – 2 V,
TA = –40°C to +125°C		 90 104 dB
VS = ±18 V, (V–) – 0.1 V < VCM< (V+) – 2 V,
TA = –40°C to +125°C		 110 120
INPUT IMPEDANCE
Differential 100 || 4 MΩ || pF
Common-mode 6 || 4 1013Ω || pF
OPEN-LOOP GAIN
AOL Open-loop voltage gain (V–) + 0.35 V < VO< (V+) – 0.35 V, RL = 10 kΩ, TA = –40°C to +125°C OPA172, OPA4172 110 130 dB
OPA2172 107 115
(V–) + 0.5 V < VO< (V+) – 0.5 V,
RL = 2 kΩ, TA = –40°C to +125°C		 OPA172, OPA4172 116
OPA2172 107
FREQUENCY RESPONSE
GBP Gain bandwidth product 10 MHz
SR Slew rate G = +1 10 V/µs
tS Settling time To 0.1%, VS = ±18 V, G = +1, 10-V step 2 µs
To 0.01% (12 bit), VS = ±18 V, G = +1, 10-V step 3.2
Overload recovery time VIN × Gain > VS 200 ns
THD+N Total harmonic distortion + noise VS = +36 V, G = +1, f = 1 kHz, VO = 3.5 VRMS 0.00005%
OUTPUT
VO Voltage output swing from rail VS = +36 V RL = 10 kΩ 70 90 mV
RL = 2 kΩ 330 400
VS = +36 V,
TA = –40°C to +125°C		 RL = 10 kΩ 95 120
RL = 2 kΩ 470 530
VS = +4.5V RL = 10 kΩ 10 20
RL = 2 kΩ 40 50
VS = +4.5 V,
TA = –40°C to +125°C		 RL = 10 kΩ 10 25
RL = 2 kΩ 55 70
ISC Short-circuit current ±75 mA
CLOAD Capacitive load drive See Typical Characteristics pF
ZO Open-loop output impedance f = 1 MHz, IO = 0 A 60 Ω
POWER SUPPLY
VS Specified voltage range +4.5 +36 V
IQ Quiescent current per amplifier IO = 0 A 1.6 1.8 mA
IO = 0 A, TA = –40°C to +125°C 2
TEMPERATURE
Specified range –40 +125 °C
(1) The input range can be extended beyond (V+) – 2 V up to (V+) + 0.1 V. For additional information, see the Typical Characteristics and Application Information sections.