GS8051/8052/8054/8051N/8052N
250MHZ CMOS Rail-to-Rail Output Opamps
Features
•
Single-Supply Operation from +2.5V ~ +5.5V
GS8051 Available in SOT23-5 and SC70-5 Packages
•
Rail-to-Rail Output
GS8052 Available in SOP-8 and MSOP-8 Packages
•
-3dB Bandwidth(G=+1): 250MHz (Typ.)
GS8054 Available in SOP-14 and TSSOP-14 Packages
•
Low Input Bias Current: 1pA (Typ.)
GS8051N Available in SOT23-6 and SC70-6 Packages
•
Quiescent Current: 2.8mA/Amplifier (Typ.)
GS8052N Available in MSOP-10 Packages
•
Operating Temperature: -40°C ~ +125°C
•
Small Package:
General Description
The GS8051/1N(single), GS8052/2N(dual), GS8054(quad) are rail-to-rail output voltage feedback amplifiers offering ease
of use and low cost. They have bandwidth and slew rate typically found in current feedback amplifiers. All have a wide
input common-mode voltage range and output voltage swing, making them easy to use on single supplies as low as 2.5V.
Despite being low cost, the GS8051 series provide excellent overall performance. They offer wide bandwidth to 250MHz
(G = +1) along with 0.1dB flatness out to 52MHz (G = +2) and offer a typical low power of 2.8mA/amplifier.
The GS8051 series is low distortion and fast settling make it ideal for buffering high speed A/D or D/A converters. The
GS8051/2N has a power-down disable feature that reduces the supply current to 50µA. These features make the
GS8051/2N ideal for portable and battery-powered applications where size and power are critical. All are specified over
the extended -40
℃ to +125℃ temperature range.
Applications
•
Imaging
•
Photodiode Preamp
•
DVD/CD
•
Filters
•
Professional Video and Cameras
•
Hand Sets
•
Base Stations
•
A-to-D Driver
V1
Vo=0.1Vp-p
G=+1
RF=24 Ω
G=+2
1/20
GS8051/8052/8054/8051N/8052N
Pin Configuration
Figure 1. Pin Assignment Diagram
Absolute Maximum Ratings
Condition
Min
Max
-0.5V
+7.5V
Analog Input Voltage (IN+ or IN-)
Vss-0.5V
VDD+0.5V
PDB Input Voltage
Vss-0.5V
+7V
-40°C
+125°C
Power Supply Voltage (VDD to Vss)
Operating Temperature Range
Junction Temperature
+160°C
Storage Temperature Range
Lead Temperature (soldering, 10sec)
Package Thermal Resistance (TA=+25
-55°C
℃)
+150°C
+260°C
SOP-8, θJA
125°C/W
MSOP-8, θJA
216°C/W
SOT23-5, θJA
190°C/W
SOT23-6, θJA
190°C/W
SC70-5, θJA
333°C/W
ESD Susceptibility
HBM
6KV
MM
400V
Note: Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational
sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect
reliability.
V1
2/20
GS8051/8052/8054/8051N/8052N
Package/Ordering Information
PACKAGE
PACKAGE
MARKING
DESCRIPTION
OPTION
INFORMATION
GS8051-CR
SC70-5
Tape and Reel,3000
8051
GS8051-TR
SOT23-5
Tape and Reel,3000
8051
GS8052-SR
SOP-8
Tape and Reel,4000
GS8052
GS8052-MR
MSOP-8
Tape and Reel,3000
GS8052
GS8054-TR
TSSOP-14
Tape and Reel,3000
GS8054
GS8054-SR
SOP-14
Tape and Reel,2500
GS8054
Single With
GS8051N-CR
SC70-6
Tape and Reel,3000
8051N
shutdown
GS8051N-TR
SOT23-6
Tape and Reel,3000
8051N
GS8052N-MR
MSOP-10
Tape and Reel,2500
GS8052N
MODEL
CHANNEL
GS8051
Single
GS8052
Dual
GS8054
Quad
GS8051N
GS8052N
V1
Dual With
shutdown
ORDER NUMBER
3/20
GS8051/8052/8054/8051N/8052N
Electrical Performance Characteristics
(G= +2, RF=887Ω, RG=887Ω, and RL=150Ω connected to VS/2, unless otherwise noted. Typical values are at TA =+25°C.)
GS8051/52/54/51N/52N
PARAMETER
CONDITIONS
TYP
MIN/MAX OVER TEMPERATURE
℃to
+25℃
to70℃
85℃
0
+25
℃
℃
-40
-40
℃
to125
MIN/
℃
UNITS
MAX
180
MHz
TYP
250
MHz
TYP
G = +2, Vo = 0.1V p-p, RL = 50Ω
55
MHz
TYP
G = +2, Vo = 0.1V p-p, RL = 150Ω
93
MHz
TYP
G = +2, Vo = 0.1V p-p, RL = 1kΩ
122
MHz
TYP
130
MHz
TYP
DYNAMIC PERFORMANCE
-3dB Small Signal Bandwidth
G = +1, Vo = 0.1V p-p, RF
G = +2, Vo = 0.1V p-p,
Gain-Bandwidth Product
Ω
= 24Ω, R
G = +1, Vo = 0.1V p-p, RF = 24 , RL = 150Ω
L
= 1kΩ
RL = 10kΩ
G = +10, RL = 150Ω
115
MHz
TYP
G = +10, RL = 1kΩ
150
MHz
TYP
52
MHz
TYP
Ω
Bandwidth for 0.1dB Flatness
G = +2, Vo = 0.1V p-p, RL = 150 , RF =887Ω
Slew Rate
G = +1, 2V Output Step
77/-151
G = +2, 2V Output Step
88/-119
G = +2, 4V Output Step
93/-131
μs
V/μs
V/μs
G = +2, Vo = 0.2Vp-p, 10% to 90%
4.5
ns
TYP
G = +2, Vo = 2Vp-p, 10% to 90%
18
ns
TYP
Settling Time to 0.1%
G = +2, 2V Output Step
50
ns
TYP
Overload Recovery Time
VIN
18
ns
TYP
nV/ Hz
TYP
Rise-and-Fall Time
· G = +VS
V/
TYP
TYP
TYP
NOISE/DISTORTION PERFORMANCE
Input Voltage Noise
f = 1MHz
4.9
Differential Gain Error (NTSC)
G = +2, RL = 150Ω
0.03
%
TYP
Differential Phase Error (NTSC)
G = +2, RL = 150Ω
0.08
degree
TYP
mV
MAX
DC PERFORMANCE
Input Offset Voltage (VOS)
±2
Input Offset Voltage Drift
2
μV/℃
TYP
Input Bias Current (IB)
1
PA
TYP
Input offset Current (IOS)
2
PA
TYP
Open-Loop Gain (AOL)
±8
±8.9
±9.5
±9.8
VO = 0.3V to 4.7V, RL = 150Ω
80
75
74
74
73
dB
MIN
VO = 0.2V to 4.8V, RL = 1kΩ
104
92
91
91
80
dB
MIN
V
TYP
dB
MIN
INPUT CHARACTERISTICS
Input Common-Mode Voltage Range (VCM)
Common-Mode Rejection Ratio (CMRR)
V1
-0.2 to +3.8
VCM = -0.1V to +3.5V
80
66
65
65
62
4/20
GS8051/8052/8054/8051N/8052N
Electrical Performance Characteristics
(G= +2, RF=887Ω, RG=887Ω, and RL=150Ω connected to VS/2, unless otherwise noted. Typical values are at TA =+25°C.)
GS8051/52/54/51N/52N
PARAMETER
CONDITIONS
TYP
MIN/MAX OVER TEMPERATURE
℃
to70℃
0
+25
℃
+25
℃
℃to
85℃
-40
℃
to125℃
-40
MIN/
UNITS
MAX
OUTPUT CHARACTERISTICS
RL = 150Ω
0.12
V
TYP
RL = 1kΩ
0.03
V
TYP
mA
MIN
0.08
Ω
TYP
Turn-On Time
236
ns
TYP
Turn-Off Time
52
ns
TYP
Output Voltage Swing from Rail
Output Current
Closed-Loop Output Impedance
130
＜
f 100kHz
100
95
90
84
POWER-DOWN DISABLE
(GS8051/2N only)
DISABLE Voltage-Off
0.8
V
MAX
DISABLE Voltage-On
2
V
MIN
POWER SUPPLY
Operating Voltage Range
2.5
2.7
2.7
2.7
V
MIN
5.5
5.5
5.5
5.5
V
MAX
Quiescent Current (per amplifier)
2.8
3
3.2
3.6
3.8
mA
MAX
Supply Current when Disabled per
50
70
85
100
137
μA
MAX
80
67
67
65
62
dB
MIN
amplifier(GS8051/2N only)
Power Supply Rejection Ratio (PSRR)
V1
∆VS = +2.7V to +5.5V, VCM = (-VS) +0.5
5/20
GS8051/8052/8054/8051N/8052N
Typical Performance characteristics
(Vs=+5V,G= +2, RF=887Ω,RG=887Ω,and RL=150Ωconnected to Vs/2, unless otherwise noted. Typical values are at TA =+25°C.)
Non-Inverting Small-Signal Step Response
Output Voltage (50mV/div)
Time (50ns/div)
Time (50ns/div)
Supply Current vs. Temperature
Sutdown Current vs. Temperature
Vs=5V
Vs=3V
Vs=2.7V
Shutdown Current ( A)
Supply Current (mA)
Output Voltage (500mV/div)
Non-Inverting Large-Signal Step Response
µ
Vs=5V
Vs=2.7V
℃
℃
Temperature ( )
Temperature ( )
Output Voltage Swing vs. Output Current
Output Voltage vs. Output Current
Sourcing Current
Output Voltage (V)
℃
25
℃
-50
Vs=5V
℃
135
℃
25
℃
-50
Sinking Current
Output Current (mA)
V1
Sourcing Current
℃
135
Output Voltage (V)
℃
135
℃
25
℃
-50
Vs=3V
℃
-50
℃
135
℃
25
Sinking Current
Output Current (mA)
6/20
GS8051/8052/8054/8051N/8052N
Typical Performance characteristics
((Vs=+5V,G= +2, RF=887Ω,RG=887Ω,and RL=150Ωconnected to Vs/2, unless otherwise noted. Typical values are at TA =+25°C.)
Non-Inverting Small Signal Frequency Response
G=+1
RF=24 Ω
G=+2
G=+5
G=+10
Vo=0.1Vp-p
Normalized Gain (dB)
ormalized Gain (dB)
Vo=0.1Vp-p
Inverting Small Signal Frequency Response
G=-10
Frequency Response For Various RL
0.1dB Gain Flatness For Various RF
RL=1KΩ
CL=0pF
Vo=0.1Vp-p
RL=150Ω
RL=50Ω
CL=0pF
Vo=0.1Vp-p
Normalized Gain (dB)
Normalized Gain (dB)
G=-5
Frequency(MHz)
RF=900Ω RF=1KΩ
RF=887Ω
Frequency (MHz)
Frequency (MHz)
Frequency Response For Various CL
Frequency Response vs.Capacitive Load
CL=100pF
CL=0pF
Vo=0.1Vp-p
CL=47pF
CL=6pF
Frequency (MHz)
Vo=0.1Vp-p
Normalized Gain (dB)
Normalized Gain (dB)
G=-2
Frequency(MHz)
RL=10KΩ
V1
G=-1
CL=100pF
RS=37.4Ω
CL=6pF
RS=100Ω
CL=47pF
RS=66.5Ω
Frequency (MHz)
7/20
GS8051/8052/8054/8051N/8052N
Typical Performance characteristics
(Vs=+5V,G= +2, RF=887Ω,RG=887Ω,and RL=150Ωconnected to Vs/2, unless otherwise noted. Typical values are at TA =+25°C.)
Input Voltage Noise Spectral Density vs. Frequency
Overload Recovery Time
±
Frequency(KHz)
Time(25ns/div)
Large-Signal Disable/Enable Response
Closed-Loop Output Impedance vs Frequency
Vout=1.5V
VS=5V
fIN=2MHz
G=+2
Time (500n/div)
V1
Output Impedance (ohm)
Output Voltage (1V/div)
Voltage Noise (nV/√Hz)
VS= 2.5V
VIN=1.58V
G=+2
Frequency (MHz)
8/20
GS8051/8052/8054/8051N/8052N
Application Note
Driving Capacitive Loads
GS805X series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small
footprints of the GS805X series packages save space on printed circuit boards and enable the design of smaller electronic
products.
Power Supply Bypassing and Board Layout
GS805X series operates from a single 2.5V to 5.5V supply or dual ±1.25V to ±2.75V supplies. For best performance, a 0.1µF
ceramic capacitor should be placed close to the VDD pin in single supply operation. For dual supply operation, both VDD and VSS
supplies should be bypassed to ground with separate 0.1µF ceramic capacitors.
Low Supply Current
The low supply current (typical 2.8mA per channel) of GS805X series will help to maximize battery life. They are ideal for
battery powered systems
Operating Voltage
GS805X series operate under wide input supply voltage (2.5V to 5.5V). In addition, all temperature specifications apply from
o
o
-40 C to +125 C. Most behavior remains unchanged throughout the full operating voltage range. These guarantees ensure
operation throughout the single Li-Ion battery lifetime
Rail-to-Rail Output
Rail-to-Rail output swing provides maximum possible dynamic range at the output. This is particularly important when
operating in low supply voltages. The output voltage of GS805X series can typically swing to less than 8mV from supply rail in
light resistive loads (>1kΩ), and 30mV of supply rail in moderate resistive loads (150Ω).
Capacitive Load Tolerance
The GS805X family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance will create a
pole in the amplifier’s feedback path, leading to excessive peaking and potential oscillation. If dealing with load capacitance is
a requirement of the application, the two strategies to consider are (1) using a small resistor in series with the amplifier’s output
and the load capacitance and (2) reducing the bandwidth of the amplifier’s feedback loop by increasing the overall noise gain.
Figure 2. shows a unity gain follower using the series resistor strategy. The resistor isolates the output from the capacitance
and, more importantly, creates a zero in the feedback path that compensates for the pole created by the output capacitance.
Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor
The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive load RL in parallel with the
capacitive load, a voltage divider (proportional to RISO/RL) is formed, this will result in a gain error.
V1
9/20
GS8051/8052/8054/8051N/8052N
The circuit in Figure 3 is an improvement to the one in Figure 2. RF provides the DC accuracy by feed-forward the VIN to RL. CF
and RISO serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the
amplifier’s inverting input, thereby preserving the phase margin in the overall feedback loop. Capacitive drive can be increased
by increasing the value of CF. This in turn will slow down the pulse response.
Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy
V1
10/20
GS8051/8052/8054/8051N/8052N
Typical Application Circuits
Differential amplifier
The differential amplifier allows the subtraction of two input voltages or cancellation of a signal common the two inputs. It is useful
as a computational amplifier in making a differential to single-end conversion or in rejecting a common mode signal. Figure 4.
shown the differential amplifier using GS805X.
Figure 4. Differential Amplifier
VOUT= ( RR13++RR24 ) RR41 VIN − RR12 VIP +( RR13++RR24 ) RR13 VREF
If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then
VOUT =
R2
R1
(VIP − VIN ) + VREF
Low Pass Active Filter
The low pass active filter is shown in Figure 5. The DC gain is defined by –R2/R1. The filter has a -20dB/decade roll-off after its
corner frequency ƒC=1/(2πR3C1).
Figure 5. Low Pass Active Filter
V1
11/20
GS8051/8052/8054/8051N/8052N
Driving Video
The GS805x can be used in video applications like in Figure 6.
Figure 6. Typical video driving
V1
12/20
GS8051/8052/8054/8051N/8052N
Package Information
MSOP-8
V1
13/20
GS8051/8052/8054/8051N/8052N
SOP-8
V1
14/20
GS8051/8052/8054/8051N/8052N
SOT23-5
V1
15/20
GS8051/8052/8054/8051N/8052N
SOT23-6
V1
16/20
GS8051/8052/8054/8051N/8052N
MSOP-10
V1
17/20
GS8051/8052/8054/8051N/8052N
SC70-5
V1
18/20
GS8051/8052/8054/8051N/8052N
SOP-14
V1
19/20
GS8051/8052/8054/8051N/8052N
TSSOP-14
V1
20/20
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