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

THS4561
This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation
Low Power, 70MHz, High Supply Range, Fully Differential Amplifier

 

Sample Availability

Prototype samples are available (XTHS4561IDGKR). Request now

Prototype samples are available (XTHS4561IRGT). Request 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

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Part number Order 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) Iq per channel (Typ) (mA) Rail-to-rail Vos (offset voltage @ 25 C) (Max) (mV) Operating temperature range (C) Package Group Output current (Typ) (mA) 2nd harmonic (dBc) 3rd harmonic (dBc) Package size: mm2:W x L (PKG) GBW (Typ) (MHz) Input bias current (Max) (pA) @ MHz CMRR (Typ) (dB)
THS4561 Order now 1     2.85     12.6     70     1     130     5     0.82     In to V-
Out    
0.2     -40 to 125     VSSOP | 8     35     110     115     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)     60     200000       110    
THS4531A Order now 1     2.5     5.5     36     1     220     10     0.25     In to V-
Out    
0.4     -40 to 125     QFN | 10
SOIC | 8
VSSOP | 8    
26     129     138     10QFN: 4 mm2: 2 x 2 (QFN | 10)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
27     250000     0.001     116    
THS4541 Order now 1     2.7     5.4     620     1     1500     2.2     10.1     In to V-
Out    
0.45     -40 to 125     QFN | 10
VQFN | 16    
100     140     140     10QFN: 4 mm2: 2 x 2 (QFN | 10)
16VQFN: 9 mm2: 3 x 3 (VQFN | 16)    
850     13000000     0.1     100    
THS4551 Order now 1     2.7     5.4     150     1     220     3.3     1.35     In to V-
Out    
0.175     -40 to 125     QFN | 10
VQFN | 16