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THS4531_15 Datasheet, PDF (1/55 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier | |||
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THS4531
www.ti.com
SLOS358B â SEPTEMBER 2011 â REVISED MARCH 2012
Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier
Check for Samples: THS4531
FEATURES
1
⢠Ultra Low Power:
â Voltage: 2.5 V to 5.5 V
â Current: 250 µA
â Power-Down Mode: 0.5 µA (typ)
⢠Fully-Differential Architecture
⢠Bandwidth: 36 MHz
⢠Slew Rate: 200 V/µs
⢠THD: â120 dBc at 1 kHz (1 VRMS, RL= 2 kâ¦)
⢠Input Voltage Noise: 10 nV/âHz (f = 1 kHz)
⢠High DC Accuracy:
â VOS Drift: ±4 µV/ËC (â40°C to +125°C)
â AOL: 114 dB
⢠Rail-to-Rail Output (RRO)
⢠Negative Rail Input (NRI)
⢠Output Common-Mode Control
APPLICATIONS
⢠Low-Power SAR, ÎΣ ADC Driver
⢠Low Power, High Performance:
â Differential to Differential Amplifier
â 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 THS4531 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 (ÎΣ) ADCs using only
single-supply 2.5-V to 5-V power. The THS4531 is
also a valuable tool for general-purpose, low-power
differential signal conditioning applications.
The THS4531 is characterized for operation over the
extended industrial temperature range from â40°C to
+125°C. The following package options are available:
⢠8-pin SOIC (MSOP) and VSSOP (D and DGK)
⢠10-pin WQFN (RUN)
0
â10
â20
â30
â40
â50
â60
â70
â80
â90
â100
â110
â120
â130
â140
0
VS = 5 V
G = 1 V/V
VOUT = 1 VRMS
RF = 2 kâ¦
RL = 600 â¦
5k
10k
15k
20k
24k
Frequency (Hz)
G071
Figure 1. 1-kHz FFT Plot on Audio Analyzer
DEVICE
THS4521
THS4520
THS4121
THS4131
BW (MHz)
145
570
100
150
Table 1. Related Products
IQ (mA)
1.14
15.3
16
16
THD (dBc) at 100
kHz
â120
â114
â79
â107
VN (nV/âHz)
4.6
2
5.4
1.3
RAIL-TO-RAIL
Out
Out
In/Out
No
1
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 © 2011â2012, Texas Instruments Incorporated
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