THS4541_15 Datasheet, PDF (1/61 Pages) Texas Instruments – THS4541 Negative Rail Input, Rail-to-Rail Output, Precision, 850-MHz Fully Differential Amplifier

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THS4541
SLOS375A – AUGUST 2014 – REVISED SEPTEMBER 2014
THS4541 Negative Rail Input, Rail-to-Rail Output, Precision, 850-MHz
Fully Differential Amplifier
1 Features
•1 Fully Differential Amplifier (FDA) Architecture
• Bandwidth: 500 MHz (G = 2 V/V)
• Gain Bandwidth Product: 850 MHz
• Slew Rate: 1500 V/µs
• HD₂: –95 dBc at 10 MHz (2 V_PP, R_L = 500 Ω)
• HD₃: –90 dBc at 10 MHz (2 V_PP, R_L = 500 Ω)
• Input Voltage Noise: 2.2 nV/Hz (f > 100 kHz)
• Low offset drift: ±0.5 µV/°C (typ)
• Negative Rail Input (NRI)
• Rail-to-Rail Output (RRO)
• Robust Operation for Rload ≥ 50 Ω
• Output Common-Mode Control
• Power Supply:
– Single-Supply Voltage Range: 2.7 V to 5.4 V
– Split-Supply Voltage Range: ±1.35 V to ±2.7 V
– Quiescent Current: 10.1 mA (5-V Supply)
• Power-Down Capability: 2 µA (typ)
2 Applications
• Low-Power, High-Performance ADC Driver
– SAR, ΔΣ, and Pipeline
• Low Power, High Performance
(DC or AC Coupled)
– Single-Ended to Differential Amplifier
– Differential to Differential Amplifier
• Differential Active Filters
• Differential Transimpedance for DAC Outputs
• DC- or AC-Coupled Interface to the ADC3xxx
Family of Low-Power, High-Performance ADCs
• Pin-Compatible to ADA4932-1 (VQFN-16)
3 Description
The THS4541 is a low-power, voltage-feedback, fully
differential amplifier (FDA) with an input common-
mode range below the negative rail, and rail-to-rail
output. Designed for low-power data acquisition
systems where high density is critical in a high-
performance analog-to-digital converter (ADC) or
digital-to-analog converter (DAC) interface design.
The THS4541 features the negative-rail input
required when interfacing a dc-coupled, ground-
centered, source signal. This negative-rail input, with
rail-to-rail output, allows for easy interface between
single-ended, ground-referenced, bipolar signal
sources and a wide variety of successive
approximation register (SAR), delta-sigma (ΔΣ), or
pipeline ADCs using only a single +2.7-V to +5.4-V
power supply.
The THS4541 is characterized for operation over the
wide temperature range of –40°C to 125°C available
in 16-pin VQFN and 10-pin WQFN packages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
THS4541
VQFN (16)
WQFN (10)
3.00 mm × 3.00 mm
2.00 mm × 2.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Simplified Schematic
50- Input Match,
Gain of 2 V/V from Rt,
Single-Ended Source to
Differential Output
THS4541 Wideband,
Fully-Differential Amplifier
Rf1
402
50- 
Source
C1
Rg1
100 nF ₁₉₁
Rt
60.2
Vocm
Rg2
221
Vcc
±
+
FDA
±
+
PD
Vcc
Rload
500
Output
Measurement
Point
C2
100 nF
Rf2
402
1
Single to Differential Gain of 2, 2-V_PP Output
-50
HD2
-60
HD3
-70
-80
-90
-100
-110
-120
-130
-140
0.1
1
10
Frequency (MHz)
50
D013
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.