THS4531A_15 Datasheet, PDF (1/59 Pages) Texas Instruments – THS4531A Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier

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THS4531A
SLOS823B – DECEMBER 2012 – REVISED JUNE 2015
THS4531A Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier
1 Features
•1 Ultra Low-Power:
– Voltage: 2.5 V to 5.5 V
– Current: 250 µA
– Power-Down Mode: 0.5 µA (Typical)
• Fully Differential Architecture
• Bandwidth: 36 MHz (Av = 1 V/V)
• Slew Rate: 200 V/µs
• THD: –120 dBc at 1 kHz (1 V_RMS, R_L= 2 kΩ)
• Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
• High DC Accuracy:
– V_OS: ±100 µV
– V_OS Drift: ±3 µV/˚C (–40°C to +125°C)
– A_OL: 114 dB
• Rail-to-Rail Output (RRO)
• Negative Rail Input (NRI)
• Output Common-Mode Control
• 8-Pin SOIC (D) and VSSOP (DGK)
• 10-Pin WQFN (RUN)
2 Applications
• Low-Power SAR, ΔΣ ADC Driver
• Low-Power, High Performance:
– Differential-to-Differential Amplifier
– Single-Ended to Differential Amplifier
• Low-Power, Wide-Bandwidth Differential Driver
• Low-Power, Wide-Bandwidth Differential Signal
Conditioning
• High-Channel Count and Power Dense Systems
3 Description
The THS4531A device is a low-power, fully
differential amplifier with input common-mode range
below the negative rail and rail-to-rail output. The
device is designed for low-power data acquisition
systems and high-density applications where power
consumption and dissipation is critical.
The device features accurate output common-mode
control that allows for DC coupling when driving
analog-to-digital converters (ADCs). This control,
coupled with the input common-mode range below
the negative rail and rail-to-rail output, allows for easy
interface from single-ended ground-referenced signal
sources to successive-approximation registers
(SARs), and delta-sigma (ΔΣ) ADCs using only
single-supply 2.5-V to 5-V power. The THS4531A is
also a valuable tool for general-purpose, low-power
differential signal conditioning applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
THS4531A
VSSOP (8)
3.00 mm × 3.00 mm
WQFN (10)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1-kHz FFT Plot on Audio Analyzer
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
0
V_S = 5 V
G = 1 V/V
V_OUT = 1 V_RMS
R_F = 2 kΩ
R_L = 600 Ω
5k
10k
15k
20k
24k
Frequency (Hz)
G071
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.