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OPA2846 数据手册 - TI（德州仪器）
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TI（德州仪器）
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双路宽带低噪声电压反馈运算放大器
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封装尺寸在P24P26P27
型号编码规则在P18
标记信息在P24
封装信息在P24P25P26P27
技术参数、封装参数在P22
应用领域在P1P12P16P18P30
电气规格在P3P4P12
型号编号列表在P22
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OPA2846数据手册
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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)
GAIN BANDWIDTH
PRODUCT (MHz)
OPA842 2.6 200
OPA843 2.0 800
OPA846 1.2 1750
OPA847 0.85 3900
Differential, 14-Bit, ADC Driver
Single−to−Differential
Gain of 10
Power−supply decoupling
not shown.
1/2
OPA2846
L
+5V
L
R
1
R
1
R
2
R
2
C
V
−
V+
14−Bit
10MSPS
ADS850
2.1pF
1/2
OPA2846
500
Ω
−
5V
18pF
1000pF
1000pF
18pF
0.1
µ
F
100
Ω
100
Ω
100
Ω
500
Ω
2.1pF
C
1
C
1
V
I
50Ω
1:2
100
Ω
V
CM
−
80
−
85
−
90
−
95
−
100
−
105
−
110
Frequency (MHz)
110
Harmonic Distortion (dBc)
V
O
=2V
PP
Differential
3rd−Harmonic
2nd−Harmonic
OPA2846
SBOS274C −JUNE 2003 − REVISED AUGUST 2008
Dual, Wideband, Low-Noise, Voltage-Feedback
Operational Amplifier
! !
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Copyright 2003-2008, Texas Instruments Incorporated
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.
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