OPA2625 High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers with shutdown | TI.com

OPA2625
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High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers with shutdown

 

Description

The OPAx625 family of operational amplifiers are excellent 16-bit and 18-bit, SAR ADC drivers that are high precision with low THD and noise allow for a unique power-scalable solution. This family of devices is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). Along with a high dc precision of only 100 µV offset voltage, a wide gain-bandwidth product of 120 MHz, a low wideband noise of 2.5 nV/√Hz, this family is optimized for driving high-throughput, high-resolution SAR ADCs, such as the ADS88xx family of SAR ADCs.

The OPAx625 features two operating modes: high-drive and low-power. In the innovative low-power mode, the OPAx625 tracks the input signal allowing the OPAx625 to transition from low-power mode to high-drive mode at 16-bit ENOB within 170 ns.

The OPAx625 family is available in 6-pin SOT and 10-pin VSSOP packages and is specified for operation from –40°C to +125°C.

Features

  • High-Drive Mode:
    • GBW (G = 100): 120 MHz
    • Slew Rate: 115 V/µs
    • 16-Bit Settling at 4-V Step: 280 ns
    • Low Voltage Noise: 2.5 nV/√Hz at 10 kHz
    • Low Output Impedance: 1 Ω at 1 MHz
    • Offset Voltage: ±100 µV (max)
    • Offset Voltage Drift: ±3 µV/ºC (max)
    • LowQuiescent Current: 2 mA (typ)
  • Low-Power Mode:
    • GBW: 1 MHz
    • Low Quiescent Current: 270 µA (typ)
  • Power-Scalable Features:
    • Ultrafast Transition from Low-Power to High-Drive Mode: 170 ns
  • High AC and DC Precision:
    • Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz
    • Input Common-Mode Range Includes Negative Rail
    • Rail-to-Rail Output
    • Wide Temperature Range: Fully Specified from –40°C to +125°C

Parametrics

Compare all products in High-speed op amps (GBW>=50MHz) Email Download to Excel
Part number Order Architecture Number of channels (#) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) BW @ Acl (MHz) Acl, min spec gain (V/V) Slew rate (Typ) (V/us) Vn at flatband (Typ) (nV/rtHz) Vn at 1 kHz (Typ) (nV/rtHz) Iq per channel (Typ) (mA) Vos (offset voltage @ 25 C) (Max) (mV) Rail-to-rail Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) CMRR (Typ) (dB) Input bias current (Max) (pA) Offset drift (Typ) (uV/C) GBW (Typ) (MHz) Output current (Typ) (mA) 2nd harmonic (dBc) 3rd harmonic (dBc) @ MHz
OPA2625 Order now Voltage FB     2     2.7     5.5     120     1     115     2.5     3.2     2     0.1     In to V-
Out    
Shutdown
C-Load Drive
Adjustable BW/IQ/IOUT    
Catalog     -40 to 125     VSSOP | 10     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     117     4000000     0.5     120     100     144     155     0.01    
OPA2626 Order now Voltage FB     2     2.7     5.5     120     1     115     2.5     3.2     2     0.1     In to V-
Out    
  Catalog     -40 to 125     VSSOP | 8     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)     117     4000000     0.5     120     100     155     144     0.01    
OPA625 Order now Voltage FB     1     2.7     5.5     80     1.1     115     2.5     3.2     2     0.1     In to V-
Out    
Shutdown
C-Load Drive
Adjustable BW/IQ/IOUT    
Catalog     -40 to 125     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)     115     4000000     0.5     120     100     80     80