THS4531A Datasheet, PDF (1/51 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

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THS4531A
SLOS823A – DECEMBER 2012 – REVISED JANUARY 2013
Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier
Check for Samples: THS4531A
FEATURES
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• Ultra Low Power:
– Voltage: 2.5 V to 5.5 V
– Current: 250 µA
– Power-Down Mode: 0.5 µA (typ)
• Fully-Differential Architecture
• Bandwidth: 36 MHz
• 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
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
DESCRIPTION
The THS4531A is a low-power, fully-differential op
amp 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.
The THS4531A is characterized for operation over
the extended industrial temperature range from
–40°C to +125°C. The following package options are
available:
• 8-pin SOIC (MSOP) and VSSOP (D and DGK)
• 10-pin WQFN (RUN)
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
Figure 1. 1-kHz FFT Plot on Audio Analyzer
Table 1. Related Products
DEVICE
THS4521
THS4520
THS4121
THS4131
BW (MHz)
145
570
100
150
I_Q (mA)
1.14
15.3
16
16
THD (dBc) at 100
kHz
–120
–114
–79
–107
V_N (nV/√Hz)
4.6
2
5.4
1.3
RAIL-TO-RAIL
Out
Out
In/Out
No
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated