THS4551 Datasheet, PDF (1/70 Pages) Texas Instruments – Low-Noise, Precision, 150-MHz, Fully Differential Amplifier

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THS4551
SBOS778A – APRIL 2016 – REVISED AUGUST 2016
THS4551
Low-Noise, Precision, 150-MHz, Fully Differential Amplifier
1 Features
•1 Bandwidth: 150 MHz (G = 1 V/V)
• Differential Output Slew Rate: 220 V/µs
• Gain Bandwidth Product: 135 MHz
• Negative Rail Input (NRI),
Rail-to-Rail Output (RRO)
• Wide Output Common-Mode Control Range
• Single-Supply Operating Range: 2.7 V to 5.4 V
• Trimmed Supply Current: 1.35 mA (25°C)
• 25°C Input Offset: ±175 µV (max)
• Input Offset Voltage Drift: 2.0 µV/°C (max)
• Differential Input Voltage Noise: 3.3 nV/√Hz
• HD2: –128 dBc at 2 V_PP, 100 kHz
• HD3: –139 dBc at 2 V_PP, 100 kHz
• < 50-ns Settling Time: 4-V Step to 0.01%
• 18-Bit Settling Time: 4-V Step, < 500 ns
2 Applications
• 24-Bit, Delta-Sigma (ΔΣ) ADC Drivers
• 16- to 20-Bit, Differential, High-Speed SAR
Drivers
• Differential Active Filters
• Differential Transimpedance Amplifiers
• Pin-Compatible Upgrade to the THS4521
(VSSOP-8 only)
3 Description
The THS4551 fully differential amplifier offers an easy
interface from single-ended sources to the differential
output required by high-precision analog-to-digital
converters (ADCs). Designed for exceptional dc
accuracy, low noise, and robust capacitive load
driving, this device is well suited for data acquisition
systems where high precision is required along with
the best signal-to-noise ratio (SNR) and spurious-free
dynamic range (SFDR) through the amplifier and
ADC combination.
The THS4551 features the negative rail input required
when interfacing a dc-coupled, ground-centered,
source signal to a single-supply differential input
ADC. Very low dc error and drift terms support the
emerging 16- to 20-bit successive-approximation
register (SAR) input requirements. A wide-range
output common-mode control supports the ADC
running from 1.8-V to 5-V supplies with ADC
common-mode input requirements from 0.7 V to
greater than 3.0 V.
The THS4551 device is characterized for operation
over the wide temperature range of –40°C to +125°C,
and is available in 8-pin VSSOP, 16-pin VQFN, and
10-pin WQFN packages.
Low-Power ADCs Supported by the THS4551
PART
NUMBER
ADC TYPE
RESOLUTION, SPEED
ADS127L01 Delta sigma 24 bits, 0.512 MSPS
ADS8881
SAR
18 bits, 1 MSPS
ADS9110
SAR
18 bits, 2 MSPS
ADC3241
Pipeline
14 bits, 25 MSPS
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic: Gain of 1 V/V, Single-Ended Input to Differential Output, 500-kHz,
Multiple Feedback Filter Interface to the ADS127L01
1.2 k
270 pF
1.2 k
470 pF
1.2 k
330
1 nF
330
3V
+
±
5
THS4551
5
270 pF
1.2 k
10
22 nF
AINN
ADS127L01
AINP
10
Copyright © 2016, Texas Instruments Incorporated
1
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.