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19-3407; Rev 1; 10/05
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
General Description
The single MAX9914/MAX9915 and dual MAX9916/ MAX9917 operational amplifiers feature maximized ratio of gain bandwidth to supply current and are ideal for battery-powered applications such as portable instrumentation, portable medical equipment, and wireless handsets. These CMOS op amps feature an ultra-low 1pA input bias current, rail-to-rail inputs and outputs, low 20A supply current, and operate from a single 1.8V to 5.5V supply. For additional power conservation, the MAX9915/MAX9917 feature a low-power shutdown mode that reduces supply current to 1nA, and puts the amplifier outputs in a high-impedance state. These devices are unity-gain stable with a 1MHz gain-bandwidth product. The MAX9914 and MAX9915 are available in 5-pin and 6-pin SC70 packages, respectively. The MAX9916 is available in an 8-pin SOT23 package, and the MAX9917 in a 10-pin MAX(R) package. All devices are specified over the -40C to +85C extended operating temperature range. High 1MHz GBW Ultra-Low 20A Supply Current Single 1.8V to 5.5V Supply Voltage Range Ultra-Low 1pA Input Bias Current Rail-to-Rail Input and Output Voltage Ranges Low 200V Input Offset Voltage Low 0.001A Shutdown Current High-Impedance Output During Shutdown (MAX9915/MAX9917) Unity-Gain Stable Available in Tiny SC70, SOT23, and MAX Packages
Features
MAX9914-MAX9917
Applications
Portable Medical Devices Portable Test Equipment RF Tags Laptops Data-Acquisition Equipment
PART MAX9914EXK+T MAX9914EXK-T MAX9915EXT+T MAX9915EXT-T MAX9916EKA+T MAX9916EKA-T MAX9917EUB MAX9917EUB+
MAX9916
IN+ INA+ OUTA OUT R1 47k INAGAIN = RG* ININB+ OUTB R3 10k INBVSS R2 10k (R1 + R2 + R3 + R4) (R2 + R3)
Ordering Information
TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 5 SC70-5 5 SC70-5 6 SC70-6 6 SC70-6 8 SOT23-8 8 SOT23-8 10 MAX 10 MAX TOP MARK AGB AGB ACB ACB AEJZ AEJZ -- --
Typical Operating Circuit
3V VDD
+Denotes lead-free package.
Selector Guide
PART AMPLIFIERS PER PACKAGE 1 1 2 2 SHUTDOWN PACKAGE MODE No Yes No Yes 5 SC70-5 6 SC70-6 8 SOT23-8 10 MAX
FOR R1 = R4 AND R2 = R3 GAIN = 1 + R4 R2
MAX9914EXK-T
R4 47k
MAX9915EXT-T MAX9916EKA-T MAX9917EUB
MICROPOWER, TWO-OP-AMP INSTRUMENTATION AMPLIFIER *OPTIONAL INPUT RESISTOR RG, IS FOR GAIN ADJUSTMENT
MAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (VDD to VSS) ......................-0.3V to +6.0V IN_+, IN_-, OUT_, SHDN_............... (VSS - 0.3V) to (VDD + 0.3V) Current into IN_+, IN_- ......................................................20mA Output Short-Circuit Duration to VDD or VSS ..............Continuous Continuous Power Dissipation (TA = +70C) 5-Pin SC70 (derate 3.1mW/C above +70C) ............. 247mW 6-Pin SC70 (derate 3.1mW/C above +70C) ............. 245mW 8-Pin SOT23 (derate 9.1mW/C above +70C)........... 727mW 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW Operating Temperature Range .......................... -40C to +85C Junction Temperature .....................................................+150C Storage Temperature Range ............................-65C to +150C Lead Temperature (soldering, 10s) ............................... +300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD / 2, RL = connected to VDD / 2, SHDN_ = VDD, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Range SYMBOL VDD CONDITIONS Guaranteed by PSRR test MAX9914/MAX9915 Supply Current IDD MAX9916/MAX9917 Shutdown Supply Current Input Offset Voltage Input-Offset-Voltage Matching Input Bias Current Input Offset Current Input Resistance Input Common-Mode Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio IB IOS RIN VCM CMRR PSRR IDD(SHDN_) VOS MAX9916/MAX9917 (Note 2) (Note 2) Common mode Differential mode, -1mV < VIN < +1mV Guaranteed by CMRR test -0.1V < VCM < VDD + 0.1V, VDD = 5.5V 1.8V < VDD < 5.5V 25mV < VOUT < VDD - 25mV, RL = 100k, VDD = 5.5V 100mV < VOUT < VDD - 100mV, RL = 5k, VDD = 5.5V RL = 100k Output-Voltage-Swing High VOH VDD - VOUT RL = 5k RL = 1k RL = 100k Output-Voltage-Swing Low Channel-to-Channel Isolation Output Short-Circuit Current VOL CHISO IOUT(SC) VOUT - VSS RL = 5k RL = 1k Specified at DC, MAX9916/MAX9917 VSS 0.1 70 65 95 95 80 85 120 dB 110 2.5 50 250 2.5 50 250 100 15 dB mA 5 70 mV 5 70 mV VDD = 1.8V VDD = 5.5V VDD = 1.8V VDD = 5.5V MIN 1.8 20 20 40 40 0.001 0.2 250 1 1 1 10 VDD + 0.1 10 10 50 0.5 1 A mV V pA pA G V dB dB 25 A TYP MAX 5.5 UNITS V
SHDN_ = GND, MAX9915/MAX9917
Open-Loop Gain
AVOL
2
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD / 2, RL = connected to VDD / 2, SHDN_ = VDD, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SHDN_ Logic Low SHDN_ Logic High SHDN_ Input Bias Current Output Leakage in Shutdown Gain-Bandwidth Product Phase Margin Gain Margin Slew Rate AV = 1V/V Capacitive-Load Stability (See the Driving Capacitive Loads Section) Input Voltage-Noise Density Input Current-Noise Density Settling Time Delay Time to Shutdown Delay Time to Enable Power-Up Time tSH tEN CLOAD No sustained oscillations f = 1kHz f = 1kHz To 0.1%, VOUT = 2V step, AV = -1V/V IDD = 5% of normal operation, VDD = 5.5V, VSHDN_ = 5.5V to 0 step VOUT = 2.7V, VOUT settles to 0.1%, VDD = 5.5V, VSHDN_ = 0 to 5.5V step VDD = 0 to 5.5V step AV = 10V/V RL = 5k, AV = 1V/V RISO = 1k, AV = 1V/V CL = 15pF CL = 15pF SYMBOL VIL VIH IIL IIH IOUT(SHDN_) CONDITIONS VDD = 1.8V to 3.6V, MAX9915/MAX9917 VDD = 3.6V to 5.5V, MAX9915/MAX9917 VDD = 1.8V to 3.6V, MAX9915/MAX9917 VDD = 3.6V to 5.5V, MAX9915/MAX9917 SHDN_ = VSS, MAX9915/MAX9917 (Note 2) SHDN_ = VDD, MAX9915/MAX9917 SHDN_ = VSS, VOUT = 0V to VDD, MAX9915/MAX9917 1 1 45 10 0.5 30 100 100 100 160 0.001 3.5 2 10 2 nV/Hz pA/Hz s s s s pF 1.4 2 1 500 500 MIN TYP MAX 0.4 0.8 UNITS V V nA nA MHz degrees dB V/s
MAX9914-MAX9917
ELECTRICAL CHARACTERISTICS
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD / 2, RL = connected to VDD / 2, SHDN_ = VDD, TA = -40C to +85C, unless otherwise noted.) (Note 1)
PARAMETER Supply Voltage Range Supply Current Shutdown Supply Current Input Offset Voltage Input-Offset-Voltage Temperature Coefficient SYMBOL VDD IDD IDD(SHDN_) VOS TCVOS 5 CONDITIONS Guaranteed by PSRR test MAX9914/MAX9915 MAX9916/MAX9917 VDD = 5.5V MIN 1.8 TYP MAX 5.5 29 60 1 3 UNITS V A A mV V/C
SHDN_ = GND, MAX9915/MAX9917
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3
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 1.8V to 5.5V, VSS = 0V, VCM = 0V, VOUT = VDD / 2, RL = connected to VDD / 2, SHDN_ = VDD, TA = -40C to +85C, unless otherwise noted.) (Note 1)
PARAMETER Input Bias Current Input Offset Current Input Common-Mode Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio SYMBOL IB IOS VCM CMRR PSRR Guaranteed by CMRR test -0.05V < VCM < VDD + 0.05V, VDD = 5.5V 1.8V < VDD < 5.5V 25mV < VOUT < VDD - 25mV, RL = 100k, VDD = 5.5V 150mV < VOUT < VDD - 150mV, RL = 5k, VDD = 5.5V VDD - VOUT VOUT - VSS RL = 100k RL = 5k RL = 100k RL = 5k VSS 0.05 60 60 85 dB 85 6 90 5 90 0.4 0.8 1.4 2 5 1000 1000 mV mV V V nA nA nA CONDITIONS MIN TYP MAX 30 20 VDD + 0.05 UNITS pA pA V dB dB
Open-Loop Gain
AVOL
Output-Voltage-Swing High Output-Voltage-Swing Low SHDN_ Logic Low SHDN_ Logic High SHDN_ Input Bias Current Output Leakage in Shutdown
VOH VOL VIL VIH IIL IIH
VDD = 1.8V to 3.6V, MAX9915/MAX9917 VDD = 3.6V to 5.5V, MAX9915/MAX9917 VDD = 1.8V to 3.6V, MAX9915/MAX9917 VDD = 3.6V to 5.5V, MAX9915/MAX9917 SHDN_ = VSS, MAX9915/MAX9917 SHDN_ = VDD, MAX9915/MAX9917
SHDN_ = VSS, VOUT = 0V to VDD, IOUT(SHDN_) MAX9915/MAX9917
Note 1: Specifications are 100% tested at TA = +25C (exceptions noted). All temperature limits are guaranteed by design. Note 2: Guaranteed by design, not production tested
4
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Typical Operating Characteristics
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX9914 toc01
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE
10 8 6 4 2 0 -2 -4 -6 VOS (V)
MAX9914 toc02
INPUT OFFSET VOLTAGE vs. INPUT COMMON-MODE VOLTAGE
750 500 250 0 -250 -500 -750 -1000 0 0.5 1.0 1.5 VCM (V) 2.0 2.5 3.0 TA = -40C TA = +25C TA = +85C
MAX9914 toc03
50 45 40 35 ICC (A) 30 25 20 15 10 5 0 1.8 2.6 3.3 4.1 4.8 SINGLE TA = +25C TA = -40C TA = +85C TA = +25C TA = -40C TA = +85C DUAL
12 SHUTDOWN SUPPLY CURRENT (nA)
1000
5.5
-40
-15
10
35
60
85
VSUPPLY (V)
TEMPERATURE (C)
INPUT OFFSET VOLTAGE vs. TEMPERATURE
MAX9914 toc04
INPUT BIAS CURRENT vs. TEMPERATURE
MAX9914 toc05
INPUT BIAS CURRENT vs. INPUT COMMON-MODE VOLTAGE
4 3 2 1 IB (pA) 0 -1 -2 -3 -4 -5
MAX9914 toc06
0 -20 -40 -60 VOS (V)
7 6 5 4 IB (pA) 3 2 1 0 -1 -2 -3 I B+ IB-
5
-80 -100 -120 -140 -160 -180 -200 -40 -15 10 35 60 85 TEMPERATURE (C)
-40
-15
10
35
60
85
-0.5
0
0.5
1.0
1.5 VCM (V)
2.0
2.5
3.0
3.5
TEMPERATURE (C)
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX9914 toc07
COMMON-MODE REJECTION RATIO vs. TEMPERATURE
MAX9914 toc08
COMMON-MODE REJECTION RATIO vs. FREQUENCY
-10 -20 -30 CMRR (dB) -40 -50 -60 -70 -80
MAX9914 toc09
0 -10 -20 -30 PSRR (dB) -40 -50 -60 -70 -80 -90 -100 0.1 1 10 100 1k
140 120 100 CMRR (dB) 80 60 40 20 0
0
-90 -100 -40 -15 10 35 60 85 1 10 100 1k 10k 100k TEMPERATURE (C) FREQUENCY (Hz)
10k
FREQUENCY (Hz)
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25C, unless otherwise noted.)
OUTPUT-SWING HIGH vs. TEMPERATURE
MAX9914 toc11 MAX9914 toc10
SLEW RATE vs. SUPPLY VOLTAGE
3.5 3.0 2.5 SLEW RATE (V/s) 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 1.8 2.8 3.8 4.8 5.5 SUPPLY VOLTAGE (V) 1 -40 1000
OUTPUT-SWING LOW vs. TEMPERATURE
RL = 1k
MAX9914 toc12
1000 OUTPUT VOLTAGE SWING (mV)
RL = 1k OUTPUT VOLTAGE SWING (mV)
100 RL = 5k
100 RL = 5k
10
RL = 100k
10
RL = 100k
RL TO VSS VOH = VDD - VOUT -15 10 35 60 85 TEMPERATURE (C)
1 -40 -15 10 35
RL TO VDD VOL = VOUT - VSS 60 85 TEMPERATURE (C)
OPEN-LOOP GAIN vs. TEMPERATURE (RL TO VSS)
MAX9914 toc13
OPEN-LOOP GAIN vs. TEMPERATURE (RL TO VDD)
RL = 100k RL = 5k
MAX9914 toc14
GAIN AND PHASE vs. FREQUENCY (RL = , CLOAD = 15pF)
100 80 60 40 20 0 -20 -40 -60 -80 -100 -120 PHASE GAIN
MAX9914 toc15
140 120 100 AVOL (dB) 80 60 40 20 0 -40 -15 10 35
RL = 100k
160 140 120
225 180 135 45 0 -45 -90 -135 -180 -225 -270 PHASE (DEGREES) 90
AV = 1000V/V
RL = 1k
80 60 40 20 0
RL = 1k
60
85
-40
-15
10
35
60
85
GAIN (dB)
AVOL (dB)
RL = 5k
100
1
10
100
1k
10k
100k
1M
10M
TEMPERATURE (C)
TEMPERATURE (C)
FREQUENCY (Hz)
GAIN AND PHASE vs. FREQUENCY (RL = 5k, CLOAD = 100pF)
100 80 60 40 GAIN (dB) 20 0 -20 -40 -60 -80 -100 -120 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) PHASE GAIN
MAX9914 toc16
CROSSTALK vs. FREQUENCY
180 135 PHASE (DEGREES) 90 45 0 -45 -90 -135 -180 -225 -270 -120 10 100 1k FREQUENCY (Hz) 10k 100k -100 CROSSTALK (dB) -20 -40 THD+N (dB) -60 -80 MAX9916/MAX9917
MAX9914 toc17
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY
-10 -20 -30 -40 -50 -60 -70 -80 -90 -100 10 100 1k 10k FREQUENCY (Hz) VOUT = 2VP-P
MAX9914 toc18
225
0
0
AV = 1000V/V
6
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25C, unless otherwise noted.)
VOLTAGE-NOISE DENSITY vs. FREQUENCY
MAX9914 toc19
RESISTOR ISOLATION vs. CAPACITIVE LOAD
AV = 1V/V FOR AV = 10V/V NO RISO NEEDED
MAX9914 toc20
POWER-UP SETTLING TIME
MAX9914 toc21
10,000
3000 2500 2000 RISO ()
VOLTAGE NOISE (nV/Hz)
VDD 1V/div
1000
1500 1000 500 OUTPUT 500mV/div IN+ = VDD / 2 AV = 1V/V 1s/div
100 1 10 100 1k 10k 100k FREQUENCY (Hz)
0 10 100 CLOAD (pF) 1000 10,000
SHUTDOWN RESPONSE
MAX9914 toc22
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX9914 toc23
LARGE-SIGNAL GAIN vs. FREQUENCY
3 2 GAIN (dB) 1 0 -1 -2 -3 -4 AV = 1V/V VOUT = 2VP-P CLOAD = 15pF
MAX9914 toc24
10 3V 8 6 4 GAIN (dB) 0V 2 0 -2 -4 -6 0V -8 -10 1k 10k 100k FREQUENCY (Hz) 1M AV = 1V/V VOUT = 100mVP-P CLOAD = 15pF
4
IN+ = VDD / 2 AV = 1V/V SHDN = 3V
1.5V OUTPUT
20s/div
10M
1
10
100
1000
FREQUENCY (kHz)
SMALL-SIGNAL PULSE RESPONSE (CLOAD = 15pF)
MAX9914 toc25
SMALL-SIGNAL PULSE RESPONSE (CLOAD = 100pF)
MAX9914 toc26
AV = 1V/V IN+ 50mV/div IN+ 5mV/div
AV = 10V/V
OUTPUT 50mV/div
OUTPUT 50mV/div
1s/div
5s/div
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Typical Operating Characteristics (continued)
(VDD = 3V, VSS = VCM = 0V, RL to VDD / 2, TA = +25C, unless otherwise noted.)
LARGE-SIGNAL PULSE RESPONSE (CLOAD = 15pF)
MAX9914 toc27
LARGE-SIGNAL PULSE RESPONSE (CLOAD = 100pF)
MAX9914 toc28
AV = 1V/V IN+ 1V/div IN+ 100mV/div
AV = 10V/V
OUTPUT 1V/div
OUTPUT 1V/div
5s/div
5s/div
PERCENT OVERSHOOT vs. CAPACITIVE LOAD
MAX9914 toc29
OUTPUT WAVEFORM WITH RISO (CLOAD = 47pF, RISO = 2.3k)
7 6 OVERSHOOT (%) 5 4 3 2 1 0 20 40 60 80 RL = 1M RL = 100k
MAX9914 toc30
AV = 1V/V INPUT 50mV/div
RL = 10k
OUTPUT 50mV/div
100
5s/div
CLOAD (pF)
OUTPUT WAVEFORM WITHOUT RISO (CLOAD = 47pF)
MAX9914 toc31
AV = 1V/V IN+ 50mV/div
OUTPUT 50mV/div
5s/div
8
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
Pin Description
PIN NAME MAX9914 1 2 3 4 5 -- -- -- -- -- -- -- -- -- MAX9915 1 2 3 4 6 5 -- -- -- -- -- -- -- -- MAX9916 -- 4 -- -- 8 -- 1 2 3 -- -- 5 6 7 MAX9917 -- 4 -- -- 10 -- 1 2 3 5 6 7 8 9 IN+ VSS INOUT VDD SHDN OUTA INAINA+ SHDNA SHDNB INB+ INBOUTB Noninverting Amplifier Input Negative Supply Voltage Inverting Amplifier Input Amplifier Output Positive Supply Voltage Shutdown Amplifier Output Channel A Inverting Amplifier Input Channel A Noninverting Amplifier Input Channel A Shutdown Channel A Shutdown Channel B Noninverting Amplifier Input Channel B Inverting Amplifier Input Channel B Amplifier Output Channel B FUNCTION
MAX9914-MAX9917
Detailed Description
Featuring a maximized ratio of gain bandwidth to supply current, low operating supply voltage, low input bias current, and rail-to-rail inputs and outputs, the MAX9914-MAX9917 are an excellent choice for precision or general-purpose low-current, low-voltage, battery-powered applications. These CMOS devices consume an ultra-low 20A (typ) supply current and a 200V (typ) offset voltage. For additional power conservation, the MAX9914/MAX9917 feature a lowpower shutdown mode that reduces supply current to 1nA (typ), and puts the amplifiers' output in a highimpedance state. These devices are unity-gain stable with a 1MHz gain-bandwidth product driving capacitive loads up to 30pF. The capacitive load can be increased to 100pF when the amplifier is configured for a 10V/V gain.
The MAX9914-MAX9917 are capable of driving the output to within 5mV of both supply rails with a 100k load. These devices can drive a 5k load with swings to within 60mV of the rails. Figure 1 shows no clipping at the output voltage swing of the MAX9914-MAX9917 configured as a unity-gain buffer powered from a single 3V supply.
Low Input Bias Current
The MAX9914-MAX9917 feature ultra-low 1pA (typ) input bias current. The variation in the input bias current is minimal with changes in the input voltage due to very high input impedance (in the order of 1G).
Applications Information
Driving Capacitive Loads
The MAX9914-MAX9917 amplifiers are unity-gain stable for loads up to 30pF. However, the capacitive load can be increased to 100pF when the amplifier is configured for a minimum gain of 10V/V. Applications that require greater capacitive drive capability should use an isolation resistor between the output and the capacitive load (Figure 2). Also, in unity-gain applications with relatively small RL (about 5k), the capacitive load can be increased up to 100pF.
9
Rail-to-Rail Inputs and Outputs
The MAX9914-MAX9917 amplifiers all have a parallelconnected n- and p-channel differential input stage that allows an input common-mode voltage range that extends 100mV beyond the positive and negative supply rails, with excellent common-mode rejection.
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Power-Supply Considerations
The MAX9914-MAX9917 are optimized for single 1.8V to 5.5V supply operation. A high amplifier power-supply rejection ratio of 85dB (typ) allows the devices to be powered directly from a battery, simplifying design and extending battery life.
3V IN_ 1V/div 0V 3V OUT_ 1V/div 0V VDD = 3V 200s/div
RAIL-TO-RAIL OUTPUT VOLTAGE RANGE
Power-Up Settling Time
The MAX9914-MAX9917 typically require 2s after power-up. Supply settling time depends on the supply voltage, the value of the bypass capacitor, the output impedance of the incoming supply, and any lead resistance or inductance between components. Op amp settling time depends primarily on the output voltage and is slew-rate limited. Figure 3 shows the MAX991_ in a noninverting voltage follower configuration with the input held at midsupply. The output settles in approximately 3.5s for VDD = 3V (see the Typical Operating Characteristics for the Power-Up Settling Time graph).
Figure 1. Rail-to-Rail Output Voltage Range
Shutdown Mode
The MAX9915 and MAX9917 feature active-low shutdown inputs. The MAX9915 and MAX9917 enter shutdown in 2s (typ) and exit shutdown in 10s (typ). The amplifiers' outputs are high impedance in shutdown mode. Drive SHDN low to enter shutdown. Drive SHDN high to enable the amplifier. The MAX9917 dual amplifier features separate shutdown inputs. Shut down both amplifiers for lowest quiescent current.
RISO
MAX9914- MAX9917
RL
CL
AV =
Power-Supply Bypassing and Layout
Bypass VDD with a 0.1F capacitor to ground as close to the pin as possible to minimize noise. Good layout techniques optimize performance by decreasing the amount of stray capacitance and inductance to the op amp's inputs and outputs. Minimize stray capacitance and inductance, by placing external components close to the IC.
RL 1V/V RL + RISO
Figure 2. Using a Resistor to Isolate a Capacitive Load from the Op Amp
5.5V 0V IN100k VDD
MAX991_
OUT
IN+ VSS 100k
Figure 3. Power-Up Test Configuration
10
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1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
Pin Configurations
TOP VIEW
IN+ 1
MAX9914-MAX9917
MAX9914
5 VDD IN+ 1
MAX9915
SHDN 6 VDD
VSS 2
VSS 2
5
SHDN
IN- 3
4
OUT
IN- 3
4
OUT
SC70
SC70
MAX9916
OUTA 1 8 7 6 5 VDD OUTB INBINB+ OUTA INA1 2
MAX9917
10 VDD 9 8 SHDNA SHDNB 7 6 OUTB INBINB+ SHDNB
INA- 2 INA+ 3 VSS 4
INA+ 3 VSS 4 SHDNA 5
SOT23
MAX
Chip Information
MAX9914 TRANSISTOR COUNT: 180 MAX9915 TRANSISTOR COUNT: 180 MAX9916 TRANSISTOR COUNT: 292 MAX9917 TRANSISTOR COUNT: 292 PROCESS: BiCMOS
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11
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, 5L SC70
21-0076
C
1 1
12
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SC70, 5L.EPS
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX9914-MAX9917
PACKAGE OUTLINE, 6L SC70
21-0077
C
1 1
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SC70, 6L.EPS
13
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown MAX9914-MAX9917
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
SEE DETAIL "A" b
C L
e
SYMBOL A A1 A2 b C D E E1 L L2 e e1
MIN 0.90 0.00 0.90 0.28 0.09 2.80 2.60 1.50 0.30
MAX 1.45 0.15 1.30 0.45 0.20 3.00 3.00 1.75 0.60 0.25 BSC.
C L
E
C L
E1
PIN 1 I.D. DOT (SEE NOTE 6) e1 D C
C L
0
0.65 BSC. 1.95 REF. 0 8
L2 A A2 A1
SEATING PLANE C
GAUGE PLANE
L
0
NOTE:
1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. FOOT LENGTH MEASURED FROM LEAD TIP TO UPPER RADIUS OF HEEL OF THE LEAD PARALLEL TO SEATING PLANE C. 3. PACKAGE OUTLINE EXCLUSIVE OF MOLD FLASH & METAL BURR. 4. PACKAGE OUTLINE INCLUSIVE OF SOLDER PLATING. 5. COPLANARITY 4 MILS. MAX. 6. PIN 1 I.D. DOT IS 0.3 MM y MIN. LOCATED ABOVE PIN 1. 7. SOLDER THICKNESS MEASURED AT FLAT SECTION OF LEAD BETWEEN 0.08mm AND 0.15mm FROM LEAD TIP. 8. MEETS JEDEC MO178.
PROPRIETARY INFORMATION TITLE:
DETAIL "A"
PACKAGE OUTLINE, SOT-23, 8L BODY
APPROVAL DOCUMENT CONTROL NO. REV.
21-0078
1 1
D
14
______________________________________________________________________________________
SOT23, 8L .EPS
1MHz, 20A, Rail-to-Rail I/O Op Amps with Shutdown
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX9914-MAX9917
e
10
4X S
10
INCHES MAX DIM MIN 0.043 A 0.006 A1 0.002 A2 0.030 0.037 0.120 D1 0.116 0.118 D2 0.114 0.120 E1 0.116 0.118 E2 0.114 0.199 H 0.187 L 0.0157 0.0275 L1 0.037 REF 0.0106 b 0.007 e 0.0197 BSC c 0.0035 0.0078 0.0196 REF S 0 6
MILLIMETERS MAX MIN 1.10 0.05 0.15 0.75 0.95 2.95 3.05 2.89 3.00 2.95 3.05 2.89 3.00 4.75 5.05 0.40 0.70 0.940 REF 0.177 0.270 0.500 BSC 0.090 0.200 0.498 REF 0 6
H
O0.500.1
0.60.1
1
1
0.60.1
TOP VIEW
BOTTOM VIEW
D2 GAGE PLANE A2 A b A1 D1
E2
c
E1 L1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL DOCUMENT CONTROL NO. REV.
21-0061
1 1
I
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
10LUMAX.EPS

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