OPA862 Texas instruments

OPA862

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OPA862

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Описание

The OPA862 is a single-ended to differential analog-to-digital converter (ADC) driver with high input impedance for directly interfacing with sensors. The device only consumes 3.1-mA quiescent current for an output-referred noise density of 8.3 nV/√ Hz in a gain of 2-V/V configuration. A fully differential amplifier configured in a gain of 1 V/V with 1-kΩ resistors must be less than 1 nV/√ Hz to achieve the OPA862 equivalent output-referred noise density of 8.3 nV/√ Hz. The OPA862 can be configured for other gains using external resistors. The device has a large gain-bandwidth product of 400 MHz and a slew rate of 140 V/µs. This yields exceptional linearity and fast-settling, 18-bit performance over comparable single-ended-to-differential ADC drivers. The device includes a reference input pin for setting the output common-mode voltage.The OPA862 is fully characterized to operate over a wide supply range of 3 V to 12.6 V, and features a rail-to-rail output stage. The device is fabricated using Texas Instruments proprietary, high-speed, silicon-germanium (SiGe) process and achieves exceptional distortion performance for 18-bit systems. The device includes a disable mode that consumes only 12-µA quiescent current in power-down state.The OPA862 is rated to work over the extended industrial temperature range of –40°C to +125°C.

Wide Supply Range: 3 V to 12.6 V
High Input Impedance: 325 MΩ
Voltage Noise:
- Input-Referred (f ≥ 5 kHz): 2.3 nV/√ Hz
- Output-Referred (f ≥ 10 kHz): 8.3 nV/√ Hz
Differential Output Offset: ±700 µV (Maximum)
Output Offset Drift: ±1.5 µV/°C (Typical)
A2 Bias Current Cancellation, I_B: ±5 nA (Typical)
Gain-Bandwidth Product: 400 MHz
Small-Signal Bandwidth: 44 MHz (G = 2 V/V)
Slew Rate: 140 V/µs
HD2, HD3 (V_OD = 10 V_PP, 50 kHz): –122 dBc, –140 dBc
Rail-to-Rail Output:
- High Linear Output Current: 60 mA (Typical)
Quiescent Current: 3.1 mA
Disable mode: 12-µA Quiescent Current
Extended Temperature Operation: –40°C to +125°C

Number of channels	1
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	3
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	12.6
BW at Acl (MHz)	44
Acl, min spec gain (V/V)	2
Slew rate (typ) (V/µs)	140
Architecture	Bipolar, Differential Amplifier, High Input Impedance
Vn at flatband (typ) (nV√Hz)	2.3
Iq per channel (typ) (mA)	3.1
Rail-to-rail	Out
Vos (offset voltage at 25°C) (max) (mV)	0.325
Operating temperature range (°C)	-40 to 125
Iout (typ) (mA)	60
2nd harmonic (dBc)	-122
3rd harmonic (dBc)	-140
Frequency of harmonic distortion measurement (MHz)	0.05
GBW (typ) (MHz)	400
Input bias current (max) (pA)	3100000
Features	Shutdown
CMRR (typ) (dB)	120
Rating	Catalog