The THS4508 is a wideband, fully-differential operational amplifier designed for single-supply 5-V data acquisition systems. It has very low noise at 2.3 nV/√Hz, and extremely low harmonic distortion of -72 dBc HD2 and -79 dBc HD3 at 100 MHz with 2 VPP, G = 10 dB, and 1-Ω load. Slew rate is very high at 6400 Vµs, and with settling time of 2 ns to 1% (2 V step), it is ideal for pulsed applications. It is designed for minimum gain of 6 dB, but is optimized for gain of 10 dB.
To allow for dc coupling to analog-to-digital converters (ADCs), its unique output common-mode control circuit maintains the output common-mode voltage within 5-mV offset (typical) from the set voltage, when set within 0.5 V of mid-supply. The common-mode set point is set to mid-supply by internal circuitry, which may be over-driven from an external source.
The THS4508 is a high-performance amplifier that has been optimized for use in high performance, 5-V single-supply data acquisition systems. The output has been optimized for best performance with its common-mode voltages set to mid-supply, and the input has been optimized for best performance with its common-mode voltage set to 0.7 V. High performance at a low power-supply voltage is ideal for high-performance, single-supply 5-V data-acquisition systems with a minimum parts count. The combined performance of the THS4508 in a gain of 10-dB driving the ADS5500 ADC, sampling at 125 MSPS, is 82-dBc SFDR, and 68.3-dBc SNR with a -1-dBFS signal at 70 MHz.
The THS4508 is offered in a quad 16-pin leadless QFN package (RGT), and is characterized for operation over the full industrial temperature range from -40°C to +85°C.
|Part number||Order||2nd harmonic (dBc)||3rd harmonic (dBc)||@ MHz||Acl, min spec gain (V/V)||Approx. price (US$)||Architecture||BW @ Acl (MHz)||Device type||Features||GBW (Typ) (MHz)||Number of channels (#)||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)||Slew rate (Typ) (V/us)||Total supply voltage (Min) (+5V=5, +/-5V=10)||Total supply voltage (Max) (+5V=5, +/-5V=10)||Vn at flatband (Typ) (nV/rtHz)||Vn at 1 kHz (Typ) (nV/rtHz)||Vos (offset voltage @ 25 C) (Max) (mV)|
||104||105||10||2||5.18 | 1ku||Fully Differential ADC Driver||2000||RF FDA||
|3000||1||-40 to 85||VQFN | 16||16VQFN: 9 mm2: 3 x 3 (VQFN | 16)||6400||3.75||5.25||2.3||2.3||4|
||104||108||10||2||3.50 | 1ku||Fully Differential ADC Driver||2000||RF FDA||
|3000||1||-40 to 85||VQFN | 16||16VQFN: 9 mm2: 3 x 3 (VQFN | 16)||6600||3||5.25||1.9||10||4|
|THS4511||Samples not available||117||106||10||1||5.45 | 1ku||Fully Differential ADC Driver||1600||RF FDA||Shutdown||2000||1||-40 to 85||VQFN | 16||16VQFN: 9 mm2: 3 x 3 (VQFN | 16)||4900||3.75||5.25||2||20||4|
||110||108||10||1||4.47 | 1ku||Fully Differential ADC Driver||1600||RF FDA||Shutdown||2800||1||-40 to 85||VQFN | 16||16VQFN: 9 mm2: 3 x 3 (VQFN | 16)|