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OPA626 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce OPA626
Description  Analog-to-Digital Converter (ADC) Drivers
Download  39 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

OPA626 Fiches technique(HTML) 1 Page - Texas Instruments

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Frequency (kHz)
-175
-150
-125
-100
-75
-50
-25
0
0
50
100
150
200
250
300
350
400
450
500
-115.91 dBc (Third Harmonic)
THD = -110.8 dBc
SNR = 91.88 dB
SINAD = 91.86 dB
ENOB = 14.97
+
1 k
10 nF
5 V
Input
Voltage
4.7
1 k
4.7
VREF / 4
RFLT
RFLT
CFLT
3.3 V
REF
ADS8860
GND
AVDD
VREF
OPA626
Copyright © 2016, Texas Instruments Incorporated
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Folder
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
OPA626, OPA2626
SBOS690 – JULY 2016
OPAx626 High-Speed, High-Precision, Low-Distortion 16-Bit and 18-Bit
Analog-to-Digital Converter (ADC) Drivers
1
1 Features
1
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
2 Applications
Precision SAR ADC Drivers
Precision Voltage Reference Buffers
Programmable Logic Controllers
Test and Measurement Equipment
Scientific Instrumentation
High Throughput Data Acquisition Systems
High Density, Multiplexed Data Acquisition
Systems
3 Description
The OPAx626 family of operational amplifiers are 16-
bit and 18-bit, high-precision, SAR ADC drivers with
low total harmonic distortion (THD) and noise. This
family of precision op amps 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 family
is
optimized
for
driving
high-throughput,
high-
resolution SAR ADCs in applications such as the
ADS88xx family of SAR ADCs.
The OPAx626 family is available in 5-pin SOT and
8-pin VSSOP packages and is specified for operation
from –40°C to +125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA626
SOT (5)
2.90 mm × 1.60 mm
OPA2626
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
spacer
SAR ADC Driver
High Fidelity Topology
Improves Dynamic Performance
(fIN = 10-kHz, 1-MSPS FFT)


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