| Number of channels (#) | 1 |
| Total supply voltage (Min) (+5V=5, +/-5V=10) | 3 |
| Total supply voltage (Max) (+5V=5, +/-5V=10) | 5.25 |
| BW @ Acl (MHz) | 2000 |
| Acl, min spec gain (V/V) | 2 |
| Slew rate (Typ) (V/us) | 6600 |
| Architecture | Fully Differential ADC Driver, Bipolar |
| Vn at flatband (Typ) (nV/rtHz) | 1.9 |
| Iq per channel (Typ) (mA) | 37.7 |
| Rail-to-rail | No |
| Vos (offset voltage @ 25 C) (Max) (mV) | 4 |
| Operating temperature range (C) | -40 to 85 |
| | |
| Output current (Typ) (mA) | 96 |
| 2nd harmonic (dBc) | 104 |
| 3rd harmonic (dBc) | 108 |
| Frequency of harmonic distortion measurement (MHz) | 10 |
| GBW (Typ) (MHz) | 3000 |
| Input bias current (Max) (pA) | 15500000 |
| Features | Shutdown, Decompensated |
| CMRR (Typ) (dB) | 90 |
| Rating | Catalog |
- Fully-Differential Architecture
- Centered Input Common-Mode Range
- Output Common-Mode Control
- Minimum Gain of 2 V/V (6 dB)
- Bandwidth: 1900 MHz
- Slew Rate: 6600 V/μs
- 1% Settling Time: 2 ns
- HD2: –75 dBc at 100 MHz
- HD3: –80 dBc at 100 MHz
- OIP3: 37 dBm at 70 MHz
- Input Voltage Noise: 1.9 nV/√Hz (f > 10 MHz)
- Power-Supply Voltage: 3 V to 5 V
- Power-Supply Current: 37.7 mA
- Power-Down Current: 0.65 mA
- APPLICATIONS
- 5-V Data Acquisition Systems High Linearity ADC Amplifiers
- Wireless Communication
- Medical Imaging
- Test and Measurement
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The THS4509 device is a wideband, fully-differential op amp designed for 5-V data acquisition systems. It has a low noise at 1.9 nV/√Hz, and low harmonic distortion of –75 dBc HD2 and –80 dBc HD3 at 100 MHz with 2 VPP, G=10dB, and 1-kΩ load. Slew rate is high at 6600 V/μs, and with settling time of 2 ns to 1% (2-V step), it is ideal for pulsed applications. It is designed for a minimum gain of 6 dB, but is optimized for gains 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 3-mV offset (typical) from the set voltage, when set within 0.5-V of midsupply, with less than 4-mV differential offset voltage. The common-mode set point is set to midsupply by internal circuitry, which may be overdriven from an external source.
The input and output are optimized for best performance with the common-mode voltages set to midsupply. Along with high performance at low power-supply voltage, this design makes it ideal for high-performance, single-supply 5-V data acquisition systems. The combined performance of the THS4509 in a gain of 10 dB driving the ADS5500 ADC, sampling at 125 MSPS, is 81-dBc SFDR and 69.1-dBc SNR with a –1 dBFS signal at 70 MHz.
The THS4509 is offered in a quad, leadless VQFN-16 package (RGT), and is characterized for operation over the full industrial temperature range from –40°C to +85°C.