200MHz, CMOS, Rail-to-Rail
Output Operational Amplifier
EC5912
General Description
The EC5912 is wideband, low-noise, low-distortion operational amplifier, that offer rail-to-rail output and single-supply operation down to 2.2V. They draw 5.6mA of quiescent supply current, as well as low input voltage-noise density (13nV/Hz) and low input current-noise density (400fA/Hz). These features make the devices an ideal choice for applications that require low distortion and low noise. The EC5912 has output which swing rail-to-rail and their input common-mode voltage range includes ground and offer wide bandwidth to 200MHz (G=+1) .They are specified over the extended industrial temperature range (-45℃ ~ 125℃).The single EC5912 is available in space-saving, MSOP-8 and SOP-8 packages.
Features
● Single-Supply Operation from +2.2V ~ +5.5V
● Rail-to-Rail Input / Output
● Gain-Bandwidth Product: 200MHz
● Low Input Bias Current: 10pA
● Low Offset Voltage: 1mV
● Quiescent Current: 5.6mA
● Available in MSOP-8 and SOP-8 Packages
Applications
● Portable Equipment
● Mobile Communications
● Smoke Detector
● Sensor interface
● Medical Instrumentation
● Handheld Test Equipment
● imaging / video
Pin Configurations(Top View)
Figure 1. Pin Assignment Diagram (MSOP-8 and SOP-8 Package)
Ordering Information
EC5912NN XX X
M1：SOP-8L
R1：MSOP-8L
Part Number | Package | Marking | Marking Information |
EC5912NNR1R | MSOP-8L | 5912 LLLL YYWW |
|
EC5912NNM1R | SOP-8L | EC5912 LLLLL YYWWT | 1. LLLLL：Last five Number of Lot No 2. YY：Year Code 3. WW：Week Code 4. T：Internal Tracking Code |
Absolute Maximum Ratings
Condition | Min | Max |
Power Supply Voltage (VDD to Vss) | -0.5V | +7V |
Analog Input Voltage (IN+ or IN-) | Vss-0.5V | VDD+0.5V |
Operating Temperature Range | -40°C | +125°C |
Junction Temperature | +150°C | |
Storage Temperature Range | -65°C | +150°C |
Lead Temperature (soldering, 10sec) | +300°C | |
Package Thermal Resistance (TA=+25°C) | ||
MSOP-8, θJA | 210°C | |
SOP-8, θJA | 130°C | |
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.
Electrical Characteristic
(VDD = +5V, Vss = 0V, VCM = 0V, VOUT = VDD/2, RL tied to VDD/2, SHDNB = VDD, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =+25°C.) (Notes 1,2)
Parameter | Symbol | Conditions | Min. | Typ. | Max. | Units |
Supply-Voltage Range | VDD | Guaranteed by the PSRR test | 2.2 | - | 5.5 | V |
Quiescent Supply Current (per Amplifier) | IQ | VDD = 5V | - | 7 | 8.4 | mA |
Input Offset Voltage | VOS | TA=25°C | - | 1 | - | mV |
TA=-40°C~+85°C | - | 8 | - | |||
TA=-40°C~+125°C | - | - | 10 | |||
Input Offset Voltage Tempco | ΔVOS/ΔT |
| - | 2 | - | μV/°C |
Input Bias Current | IB | (Note 3) | - | 10 | 100 | pA |
Input Offset Current | IOS | (Note 3) | - | 10 | 100 | pA |
Input Common-Mode Voltage Range | VCM | Guaranteed by the TA = 25C CMRR test, TA = -40C ~ +125C | -0.1 | - | VDD+0.1.5 | V |
Common-Mode Rejection Ratio | CMRR | Vss-0.1VVCMVDD+0.1V TA = 25C | - | 75 | - | dB |
Vss≤VCM≤VDD TA = 25C | 72 | 90 | - | |||
Vss-0.1VVCMVDD+0.1V TA = -40C ~ +125C | - | 68 | - | |||
Power-Supply Rejection Ratio | PSRR | VDD = +2.2V to +5.5V | 75 | 90 | - | dB |
Open-Loop Voltage Gain | AV | RL = 10k to VDD/2 VOUT = 100mV to VDD-125mV | 90 | 100 | - | dB |
RL = 1k to VDD/2 VOUT = 200mV to VDD-250mV | 80 | 95 | - | |||
RL = 500 to VDD/2 VOUT = 350mV to VDD-500mV | 70 | 80 | - | |||
Output Voltage Swing | VOUT | |VIN+-VIN-| 10mV VDD-VOH | - | 10 | 35 | mV |
RL = 10k to VDD/2 VOL-VSS | - | 10 | 30 | |||
|VIN+-VIN-| 10mV VDD-VOH | - | 80 | 50 | |||
RL = 1k to VDD/2 VOL-VSS | - | 30 | 50 | |||
|VIN+-VIN-| 10mV VDD-VOH | - | 100 | 140 | |||
RL = 500 to VDD/2 VOL-VSS | - | 100 | 140 | |||
Output Short-Circuit Current | ISC | Sinking or Sourcing | - | 60 | - | mA |
Input Capacitance | CIN |
|
| |
| pF |
Bandwidth | GBW | AV = +1V/V | - | 200 | - | MHz |
Slew Rate | SR | AV = +1V/V | - | 125 | - | V/μs |
Electrical Characteristic
Parameter | Symbol | Conditions | Min. | Typ. | Max. | Units |
Differential Phase error (NTSC) | DP | G=2,RL=150Ω | - | 0.03 | - | deg |
Differential Gain error (NTSC) | DG | G=2,RL=150Ω | - | 0.09 | - | dB |
Settling Time | tS | To 0.01%, VOUT = 2V step AV = +1V/V | - | 52 | - | ns |
Capacitive-Load Stability | CLOAD | No sustained oscilliations AV = +1V/V |
| 200 |
| pF |
Input Voltage Noise Density | en | ƒ = 1kHz | - | 15 | - | nV/Hz |
ƒ = 30kHz | - | 13 | - | |||
Input Current Noise Density | in | ƒ = 1kHz | - | 400 | - | fA/Hz |
Total Harmonic Distortion plus Noise | THD+N | ƒC=5MHZ,VOUT=2Vp-p,G=+2 | - | -60 | - | dB |
Note 1: All devices are 100% production tested at TA = +25°C; all specifications over the automotive temperature range is guaranteed by design, not production tested.
Note 2: Parameter is guaranteed by design.
Note 3: Peak-to-peak input noise voltage is defined as six times rms value of input noise voltage.
APPLICATION INFORMATION
Size
EC5912 series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small footprints of the EC5912 series packages save space on printed circuit boards and enable the design of smaller electronic products.
Power Supply Bypassing and Board Layout
EC5912 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 (7mA) of EC5912 series will help to maximize battery life. They are ideal for battery powered systems
Operating Voltage
EC5912 series operate under wide input supply voltage (2.5V to5.5V). In addition, all
Temperature specifications apply from -40℃ to +125℃ Most behavior remains unchanged
throughout the full operating voltage range. These guarantees ensure operation throughout the single Li-Ion battery lifetime
Rail-to-Rail Input
The input common-mode range of EC5912 series extends 100mV beyond the negative fsupply rail (VSS-0.1V to VDD-1.5V). This is achieved by using complementary input stage. For normal operation, inputs should be limited to this range.
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
EC5912 series can typically swing to less than 10mV from supply rail in light resistive loads
(>100kΩ), and 60mV of supply rail in moderate resistive loads (10kΩ).
Capacitive Load Tolerance
The EC5912 series can directly drive 200pF capacitive load in unity-gain without oscillation.
Increasing the gain enhances the amplifier’s ability to drive greater capacitive loads. In unity-gain configurations, the capacitive load drive can be improved by inserting an isolation resistor RISO in series with the capacitive load, as shown in Figure 1.
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. The circuit in Figure 2 is an improvement to the
one in Figure 1. 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.
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 3 shown the differential
amplifier using EC5912
If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then
Instrumentation Amplifier
The input impedance of the previous differential amplifier is set by the resistors R1, R2, R3, and R4.
To maintain the high input impedance, one can use a voltage follower in front of each input as shown in the following two instrumentation amplifiers.
Three-Op-Amp Instrumentation Amplifier
The triple EC5912 can be used to build a three-op-amp instrumentation amplifier as shown in Figure 4. The amplifier in Figure 4 is a high input impedance differential amplifier with gain of R2/R1. The two differential voltage followers assure the high input impedance of the amplifier.
Two-Op-Amp Instrumentation Amplifier
EC5912 can also be used to make a high input impedance two-op-amp instrumentation
amplifier as shown in Figure 5.
Where R1=R3 and R2=R4. If all resistors are equal,then Vo=2(V2-V1)
Single-Supply Inverting Amplifier
The inverting amplifier is shown in Figure 6. The capacitor C1 is used to block the DC signal going into the AC signal source VIN. The value of R1 and C1 set the cut-off frequency to fC=1/(2πR1C1). The DC gain is defined by VOUT=-(R2/R1)VIN
Sallen-Key 2nd Order Active Low-Pass Filter
EC4912 can be used to form a 2nd order Sallen-Key active low-pass filter as shown in Figure 8. The transfer function from VIN to VOUT is given by
Where the DC gain is defined by ALP=1+R3/R4, and the corner frequency is given by
The pole quality factor is given by
Let R1=R2=R and C1=C2=C, the corner frequency and the pole quality factor can be simplified as below
And Q=2-R3/R4
Sallen-Key 2nd Order high-Pass Active Filter
The 2 nd order Sallen-key high-pass filter can be built by simply interchanging those frequency selective components R1, R2, C1, and C2 as shown in Figure 9.
Where AHP=1+R3/R4
Package Information
MSOP-8
SYMBOLS | DIMENSIONS IN MILLIMETERS | DIMENSIONS IN INCHES | ||||
MIN | NOM | MAX | MIN | NOM | MAX | |
A | -- | -- | 1.10 | -- | -- | 0.043 |
A1 | 0.05 | -- | 0.15 | 0.002 | -- | 0.006 |
A2 | 0.75 | 0.85 | 0.95 | 0.030 | 0.033 | 0.037 |
b | 0.25 | -- | 0.40 | 0.010 | -- | 0.016 |
C | 0.13 | -- | 0.23 | 0.005 | -- | 0.009 |
D | 2.90 | 3.00 | 3.10 | 0.114 | 0.118 | 0.122 |
E | 2.90 | 3.00 | 3.10 | 0.114 | 0.118 | 0.122 |
E1 | 4.90 BSC | 0.193 BSC | ||||
e | 0.65 BSC | 0.026 BSC | ||||
L | -- | -- | 0.55 | -- | -- | 0.022 |
Θ | 0 | -- | 7° | 0 | -- | 7° |
Note:
1. Controlling Dimension: MM
2. Dimension D and E1 do not include Mold protrusion
3. Refer to Jedec standard MO187
4. Drawing is not to scale
SOP8
