THS4531A Texas instruments

THS4531A

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THS4531A

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Описание

The THS4531A device is a low-power, fully differential amplifier with input common-mode range below the negative rail and rail-to-rail output. The device is designed for low-power data acquisition systems and high-density applications where power consumption and dissipation is critical. The device features accurate output common-mode control that allows for DC coupling when driving analog-to-digital converters (ADCs). This control, coupled with the input common-mode range below the negative rail and rail-to-rail output, allows for easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs), and delta-sigma (ΔΣ) ADCs using only single-supply 2.5-V to 5-V power. The THS4531A is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

Ultra Low-Power:
- Voltage: 2.5 V to 5.5 V
- Current: 250 µA
- Power-Down Mode: 0.5 µA (Typical)
Fully Differential Architecture
Bandwidth: 36 MHz (Av = 1 V/V)
Slew Rate: 200 V/µs
THD: –120 dBc at 1 kHz (1 V_RMS, R_L= 2 kΩ)
Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
High DC Accuracy:
- V_OS: ±100 µV
- V_OS Drift: ±3 µV/˚C (–40°C to +125°C)
- A_OL: 114 dB
Rail-to-Rail Output (RRO)
Negative Rail Input (NRI)
Output Common-Mode Control
8-Pin SOIC (D) and VSSOP (DGK)
10-Pin WQFN (RUN)

Number of channels	1
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	2.5
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.5
BW at Acl (MHz)	36
Acl, min spec gain (V/V)	1
Slew rate (typ) (V/µs)	220
Architecture	Bipolar, Fully Differential ADC Driver
Vn at flatband (typ) (nV√Hz)	10
Iq per channel (typ) (mA)	0.25
Rail-to-rail	In to V-, Out
Vos (offset voltage at 25°C) (max) (mV)	0.4
Operating temperature range (°C)	-40 to 125
Iout (typ) (mA)	26
2nd harmonic (dBc)	129
3rd harmonic (dBc)	138
Frequency of harmonic distortion measurement (MHz)	0.001
GBW (typ) (MHz)	27
Input bias current (max) (pA)	250000
Features	Shutdown
CMRR (typ) (dB)	116
Rating	Catalog