OPA2626 Texas instruments

OPA2626

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OPA2626

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Описание

The OPA2626 operational amplifier is a 16-bit and 18-bit, high-precision, successive-approximation register (SAR) analog-to-digital converter (ADC) driver with low total harmonic distortion (THD) and noise. This op amp 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). With a high DC precision of only 100-µV offset voltage, a wide gain-bandwidth product of 120 MHz, and a low wideband noise of 2.5 nV/√Hz, this device is optimized for driving high-throughput, high-resolution SAR ADCs in applications such as the ADS88xx family of SAR ADCs.The OPA2626 is available in an 8-pin VSSOP package and is specified for operation from –40°C to +125°C.

Excellent dynamic performance:
- Low distortion: –122 dBc for HD2 and
  –140 dBc for HD3 at 100 kHz
- Gain bandwidth (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
Excellent DC precision:
- Offset voltage: ±100 µV (maximum)
- Offset voltage drift: ±3 µV/ºC (maximum)
- Low quiescent current: 2 mA (typical)
Input common-mode range includes negative rail
Rail-to-rail output
Wide temperature range: fully specified from –40°C to +125°C

Architecture	Voltage FB
Number of channels	2
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	2.7
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.5
GBW (typ) (MHz)	120
BW at Acl (MHz)	120
Acl, min spec gain (V/V)	1
Slew rate (typ) (V/µs)	115
Vn at flatband (typ) (nV√Hz)	2.5
Vn at 1 kHz (typ) (nV√Hz)	3.2
Iq per channel (typ) (mA)	2
Vos (offset voltage at 25°C) (max) (mV)	0.1
Rail-to-rail	In to V-, Out
Rating	Catalog
Operating temperature range (°C)	-40 to 125
CMRR (typ) (dB)	117
Input bias current (max) (pA)	4000000
Offset drift (typ) (µV/°C)	0.5
Iout (typ) (mA)	100
2nd harmonic (dBc)	155
3rd harmonic (dBc)	144
Frequency of harmonic distortion measurement (MHz)	0.01