THS4561 Low Power, 70MHz, High Supply Range, Fully Differential Amplifier | TI.com

THS4561 (PREVIEW)

Low Power, 70MHz, High Supply Range, Fully Differential Amplifier

 

Sample Availability

Prototype samples are available (XTHS4561IDGKR and XTHS4561IRGT). Order Now

Description

The THS4561 fully differential amplifier (FDA) offers a simple 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 ultra-low harmonic distortion, the device is well suited for data acquisition systems where high precision is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.

The THS4561 features the required negative rail input 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-bit to 20-bit successive approximation register (SAR) input requirements. A 2.85-V to 12.6-V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.

The THS4561 will be available in a dual-channel device as the THS4562 in a VQFN-24 package.

 

Features

  • Bandwidth: 70 MHz (G = 1 V/V)
  • Differential Output Slew Rate: 130 V/µs
  • Gain Bandwidth Product: 60 MHz
  • Negative Rail Input (NRI)
  • Rail-to-Rail Output (RRO)
  • Wide Output Common-Mode Control Range
  • Single-Supply Operating Range: 2.85 V to 12.6 V
  • Trimmed-Supply Current: 830 µA at ±5 V
  • 25°C Input Offset: ±200 µV (Maximum)
  • Input Offset Voltage Drift: ±2 µV/°C (Maximum)
  • Differential Input Voltage Noise: 4.5 nV/√Hz
  • Very Low 50–Hz 1/f Voltage Noise Corner
  • Very Low Harmonic Distortion
    • HD2: –115 dBc at 2-VPP, 100-kHz
    • HD3: –110 dBc at 2-VPP, 100-kHz
  • < 4-V Step Response Settling to 0.01%: < 100 ns

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Parametrics Compare all products in High-speed op amps (GBW>=50MHz)

 
Architecture
Number of channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
BW @ Acl (MHz)
Acl, min spec gain (V/V)
Slew Rate (Typ) (V/us)
Vn at flatband (Typ) (nV/rtHz)
Vn at 1 kHz (Typ) (nV/rtHz)
Iq per channel (Typ) (mA)
Vos (offset voltage @ 25 C) (Max) (mV)
Rail-to-rail
Features
Rating
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
CMRR (Typ) (dB)
Input bias current (Max) (pA)
Offset drift (Typ) (uV/C)
GBW (Typ) (MHz)
Output current (Typ) (mA)
2nd harmonic (dBc)
3rd harmonic (dBc)
@ MHz
THS4561 THS4531A THS4541 THS4551 THS4552
Fully Differential     Fully Differential
Voltage FB    
Fully Differential     Bipolar
Fully Differential
Voltage FB    
Bipolar
Fully Differential
Voltage FB    
1     1     1     1     2    
2.85     2.5     2.7     2.7     2.7    
12.6     5.5     5.4     5.4     5.4    
70     36     620     150     150    
1     1     1     1     1    
130     220     1500     220     220    
5     10     2.2     3.3     3.3    
5     10     8     3.3     3.3    
0.82     0.25     10.1     1.35     1.37    
0.2     0.4     0.45     0.175     0.265    
In to V-
Out    
In to V-
Out    
In to V-
Out    
In to V-
Out    
In to V-
Out    
Shutdown     Small Size
Shutdown    
Small Size
Shutdown    
Small Size
Shutdown    
Shutdown    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
VSSOP | 8     QFN | 10
SOIC | 8
VSSOP | 8    
QFN | 10
VQFN | 16    
QFN | 10
VQFN | 16
VSSOP | 8    
TSSOP | 16
WQFN | 24    
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)     10QFN: 4 mm2: 2 x 2 (QFN | 10)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)    
10QFN: 4 mm2: 2 x 2 (QFN | 10)
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
24WQFN: 16 mm2: 4 x 4 (WQFN | 24)    
110     116     100     110     110    
200000     250000     13000000     1500000     1500000    
0.3     3     0.5     0.45     0.45    
60     27     850     135