MAX427EPA ,Low Noise, High-Precision Op AmpsELECTRICAL CHARACTERISTICS
(Vs = i15V. TA = +25'C, unless otherwise noted.)
PARAMETER SYMBOL ..
MAX427ESA ,Low Noise, High-Precision Op AmpsApplications
Low-Noise Signal Processing
Threshold Detection
Strain-Gauge Amplifiers
Microphone ..
MAX427ESA+T ,Low-Noise, High-Precision Op Amps Not Recommended for New Designs This product was manufactured for Maxim by an outside wafer foun ..
MAX427ESA-T ,Low-Noise, High-Precision Op Amps Not Recommended for New Designs This product was manufactured for Maxim by an outside wafer foun ..
MAX427MJA ,Low Noise, High-Precision Op AmpsELECTRICAL CHARACTERISTICS
(Vs = 115V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER ..
MAX4281EUK-T ,SOT23, Rail-to-Rail, Fixed-Gain GainAmps/Open-Loop Op AmpsFeaturesThe MAX4174/MAX4175/MAX4274/MAX4275 Gain- ♦ GainAmp Family Provides Internal Precision®Amp™ ..
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MAX811MEUS-T ,Microprocessor voltage monitor with manual reset input. Reset threshold voltage 4.38VELECTRICAL CHARACTERISTICS(V = 5V for L/M versions, V = 3.3V for T/S versions, V = 3V for R version ..
MAX811REUS ,4-Pin µP Voltage Monitors with Manual Reset Input4-Pin µP Voltage Monitors MAX811/MAX812with Manual Reset Input
MAX427CPA-MAX427CSA-MAX427EPA-MAX427ESA-MAX427MJA-MAX437CPA-MAX437CSA-MAX437ESA-MAX437MJA
Low Noise, High-Precision Op Amps
190095; Rev 0; 11/92
AM] ADaLAM]
Low Noise, Ilh"glhMPree'istion Op Amps
General Description
The MAX427/MAX437 t15V operational amplifiers feature
a superior combination of low wideband noise, and ultra-
low offset voltage and drift; 2.5nVNH_z (1kHz) noise, less
than 15W offset voltage (5pV typ), and less than 0.8p)//" C
drift (0.1wVl''C typ). Voltage gain is 20 million when driving
a 2m load to t12V, and 12 million with a 6009 load to 110V.
The MAX427 is unity-gain stable, with an 8MHz gain
bandwidth and a 2.5V/ps slew rate. The decompensated
MAX437 has a 60MHz gain bandwidth, a 15Vhss slew rate,
and is stable for closed-loop gains of 5 or greater.
For applications requiring even lower noise and low-
power performance from ew supplies, see the
MAX410NAX412/MAX414 data sheet.
Applications
Low-Noise Signal Processing
Threshold Detection
Strain-Gauge Amplifiers
Microphone Preamplifiers
Typical Application Circuit
Features
. 15W Max Offset Voltage
t 0.8pWC Max Drift
. Low Nolse Performance:
4.snw4rrz Max 1011:;
3.8nV/ Hz Max 1kHz
. High-Voltage Galn:
7 Mllllon Mln 2kn Load)
3 Mllllon Mln 600n Load)
. 117dB Mln CMRR
. 60MHz Galn-Bandwldth Product (MAX437)
Ordering Information
PART TEMP. RANGE PlN-PACKAGE
MAX4270PA 0°C to +700 8 Plastic DIP
MAX427CSA O'C to +70'C 8 SO
MAX427C/D O'C to +70''C Dice"
MAX427EPA -40"C to +85'C 8 Plastic DIP
MAX427ESA -40°C to +85°C 8 SO
MAX427MJA -55°C to +125'C 8 CERDIP"
MAX437CPA 0°C to +70'C 8 Plastic DIP
MAX437CSA O'C to +70'C 8 SO
MAX437C/D JC to +70'C Dice"
MAX437EPA -40°C to +85'C 8 Plastic DIP
MAX437ESA -40°C to +85''C 8 SO
MAX437MJA -55T to +125'C 8 CERDIP"
. Dice are specified at TA = +25'C, DC parameters only.
"Contact factory for availability and processing to MIL-STD-883.
Pin Configure tion
PRECISION HlGH-GAIN DIFFERENTIAL AMPLIFIER
TOP VIEW
EAL E E] Mt
IN- E MAXIM El V+
IN 3 MAX427 6
E MAX437 E OUT
V- [E 5 "
DlP/SO
& the latest literature: http://,
Maxim Integrated Products 1
££WWW£ZWXVW
MAX427/MAX437
Ultra-Low Noise, M'iglltAPratt'ia'ion Op Amps
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .................................. t22V
Input Voltage (Note 1) ............................ 122V
Output Short-Circuit Duration ................. Continuous
Differential Input Voltage (Note 2) ................... 10.7V
Differential Input Current (Note 2) ................. t25m
Continuous Power Dissipation (TA = +70'C)
Plastic DIP (derate 9.09mW/‘C above +70'C) ...... 727mW
SO (derate 5.86mWI' C above +70'C) ............ 471mW
CERDIP (derate 8.00mwa above +70'C) ........ 640mW
Operating Temperature Ranges:
MAX427/MAX437C_A .................... O'C to +70'C
MAX427/MAX437E_A .................... M0'C to +85'C
MAX427/MAX437MJA .................. -55'C to +125'C
Junction Temperature Range .............. -65'C to +150‘C
Storage Temperature Range .............. Aitrc to o150'C
Lead Temperature (soldering, 10 sec) .............. +300‘C
Note I.. For sup l volzagles less than 122V, the absolute maximum input voltage is equal to the supply voltage.
Note 2.. MAX42
3 inputs are protected b back-to-back diodes. Current-Iimiting resistors are not used in order to achieve low
noise. If differential input voltage excee s 10.7V, the input current should be limited to 25mA.
Stresses be
d thoss listed under 'Abso/ute Maximum Ratings" may cause permanent damage to the device. These are stress ratings ony, and functional
operation a the device at these or any other conditions beyond those indicated in the operational sections of the spetu'ficatkrns is not implied, Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Vs = 115V. TA = +25'C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX unrrs
Input Offset Voltage (Note 3) vos 5 15 WV
Long-Term Vos Stability (Notes 4, 5) Vos/TIME 0.2 1.0 uV/Mo
Input Bias Current la :10 t35 nA
Input Offset Current los 7 30 nA
Input Voltage Range hm :11.0 112.5 V
Input Resistance - Common Mode RINCM 7 GD
Input Noise Voltage (Notes 5, 6) enp-p 0.1 Hz to 10Hz 0.06 0.13 pr.p
. - . f = 10Hz 2.8 4.5
t 2, gnse Voltage Density en f: = 1kHz 2.5 3.8 WNW
' - . fo= 10Hz 1.5 4.0
t 2, 521379) Current Density in fo = 1kHz 0.4 0.6 p NHRE
RL ie 2m, Vo = 112V 7 20
Large-Signal Voltage Gain Avo RL k 1m. Vo = t10V 5 16 WW
RLie61m,Vo--k10V 3 12
Output Voltage Swing Vo RL it 2KS2 t13.0 i138 V
RLZBOOQ 111.0 112.5
Open-Loop Output Resistance Ro Vo = 0, lo = 0 70 n
Common-Mode Rejection Ratio CMRR VCM = tl 1V 117 130 dB
Power-Supply Rejection Ratio PSRR Vs = A4V to kltN 110 130 dB
Gain-Bandwidth Product (Note 5) GBP MAX427, fo = 100kHz 5.0 8.0 MHz
MAX437, fo = 10kHz, AVCL 2 5 45 60
Slew Rate (Note 5) SR MAX427, RL 2 2m 1.7 2.8 V/us
MAX437, RL it 2m, AVCL it 5 11 17
Power Dissipation PD Vo = 0 80 120 mW
Offset Adjustment Range RP = 10m A4.0 mV
2 MAXIM
