0
ACTIVE
Architecture |
Voltage FB |
Number of channels |
2 |
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) |
9 |
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) |
36 |
GBW (typ) (MHz) |
180 |
BW at Acl (MHz) |
180 |
Acl, min spec gain (V/V) |
1 |
Slew rate (typ) (V/µs) |
105 |
Vn at flatband (typ) (nV√Hz) |
0.95 |
Vn at 1 kHz (typ) (nV√Hz) |
1 |
Iq per channel (typ) (mA) |
7.5 |
Vos (offset voltage at 25°C) (max) (mV) |
1 |
Rail-to-rail |
No |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 85 |
CMRR (typ) (dB) |
106 |
Input bias current (max) (pA) |
20000000 |
Offset drift (typ) (µV/°C) |
1 |
Iout (typ) (mA) |
200 |
2nd harmonic (dBc) |
91 |
3rd harmonic (dBc) |
91 |
Frequency of harmonic distortion measurement (MHz) |
1 |
HVSSOP (DGN)-8-14.7 mm² 3 x 4.9
The OPA891 and OPA2891 (OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140MHz bandwidth, gain (G) = 2V/V, 105V/µs slew rate, and 70ns settling time (0.1%). The OPAx891 are unity-gain stable with 180MHz bandwidth. These amplifiers have a high drive capability of 200mA and draw only 7.5mA supply current per channel. With –100dBc of total harmonic distortion (THD) at f = 1MHz and a very low noise of 0.95nV/√Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.
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