OPA2846 Datasheet, PDF (1/24 Pages) Texas Instruments – Dual, Wideband, Low-Noise, Voltage-Feedback Operational Amplifier

OPA2846
SBOS274A −JUNE 2003 − REVISED MARCH 2004
Dual, Wideband, Low-Noise, Voltage-Feedback
Operational Amplifier
FEATURES
D HIGH BANDWIDTH: 300MHz (G = +10)
D LOW INPUT VOLTAGE NOISE: 1.2nV/√Hz
D VERY LOW DISTORTION: –100dBc (5MHz)
D HIGH SLEW RATE: 600V/µs
D HIGH DC ACCURACY: V_IO = 150µV
D LOW SUPPLY CURRENT: 12.6mA/ch
D HIGH GAIN BANDWIDTH PRODUCT: 1650MHz
D STABLE FOR GAINS ≥ +7V/V
APPLICATIONS
D HIGH DYNAMIC RANGE ADC PREAMPS
D LOW-NOISE, WIDEBAND, TRANSIMPEDANCE
AMPLIFIERS
D WIDEBAND, HIGH GAIN AMPLIFIERS
D LOW-NOISE DIFFERENTIAL RECEIVERS
D VDSL LINE RECEIVERS
D ULTRASOUND CHANNEL AMPLIFIERS
D SECURITY SENSOR FRONT ENDS
DESCRIPTION
The OPA2846 provides two very low-noise, high gain
bandwidth, voltage-feedback op amps in a single
package. Operating from a low 12.6mA/channel quiescent
current, each channel provides a 1.2nV/√Hz input voltage
noise with a 1.65GHz gain bandwidth product. Minimum
stable gain is specified at +7V/V while exceptional flatness
is ensured at a gain of +10V/V.
The combination of low noise, high slew rate (600V/µs)
and broad bandwidth allow very high SFDR differential
receivers to be implemented. Additionally, decompen-
sated, low-noise, voltage-feedback op amps are ideal for
broadband transimpedance requirements. The dual chan-
nel OPA2846 provides matched channels for high-speed
transimpedance requirements. With over 200MHz band-
width at a gain of 20dB, excellent gain and phase matching
are provided at IF frequencies for matched I and Q channel
amplifiers.
OPA2846 RELATED PRODUCTS
SINGLES
INPUT NOISE
VOLTAGE (nV/√Hz)
OPA842
2.6
OPA843
2.0
OPA846
1.2
OPA847
0.85
GAIN BANDWIDTH
PRODUCT (MHz)
200
800
1750
3900
Power−supply decoup ling
not sho wn.
1000pF
+5V
100Ω
1/2
O P A 28 46
C1
R₁
L
−80
V_O = 2V_PP Differential
V+
−85
V_I
50Ω
18p F
1:2 100Ω
100Ω
2.1pF
500Ω
500Ω
R₂
C
V_CM
0. 1µ F
14− B it
10MSPS
ADS850
−90
−95
−100
2nd−Harmonic
S ingl e−to− Di fferen tial
Gain of 10
18pF
1000pF
2.1pF
R₂
1/2
C₁
R₁
L
O P A2 84 6
V−
100Ω
−5V
Differential, 14-Bit, ADC Driver
−105
−110
1
3rd−Harmonic
10
Frequency (MHz)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright  2003-2004, Texas Instruments Incorporated
www.ti.com