Datasheet AD549 (Analog Devices) - 3

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Data Sheet AD549 SPECIFICATIONS
At 25°C and VS = ±15 V dc, unless otherwise noted; all minimum and maximum specifications are guaranteed; specifications in
boldface
are tested on all production units at final electrical test, and results from those tests are used to calculate outgoing quality levels.
Table 1. AD549J AD549K AD549L AD549S Parameter Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit
INPUT BIAS CURRENT1 Either Input, VCM = 0 V 150
250
75
100
40
60
75
100
fA Either Input, VCM = ±10 V 150 250 75 100 40 60 75 100 fA Either Input at TMAX, 11 4.2 2.8 420 pA VCM = 0 V Offset Current 50 30 20 30 fA Offset Current at TMAX 2.2 1.3 0.85 125 pA INPUT OFFSET VOLTAGE2 Initial Offset 0.5
1.0
0.15
0. 5
0.3
0.5
0.3
0.5
mV Offset at TMAX
1.9 0.9 0.9 2.0
mV vs. Temperature 10
20
10
15
5
10
10
15
μV/°C vs. Supply 32
100
10
32
10
32
10
32
μV/V vs. Supply, TMIN to TMAX 32
100
10
32
10
32
32
50
μV/V Long-Term Offset Stability 15 15 15 15 μV/month INPUT VOLTAGE NOISE f = 0.1 Hz to 10 Hz 4 4
6
4 4 μV p-p f = 10 Hz 90 90 90 90 nV/√Hz f = 100 Hz 60 60 60 60 nV/√Hz f = 1 kHz 35 35 35 35 nV/√Hz f = 10 kHz 35 35 35 35 nV/√Hz INPUT CURRENT NOISE f = 0.1 Hz to 10 Hz 0.7 0.5 0.36 0.5 fA rms f = 1 kHz 0.22 0.16 0.11 0.16 fA/√Hz INPUT IMPEDANCE Differential VDIFF = ±1 1013||1 1013||1 1013||1 1013||1 Ω||pF Common Mode VCM = ±10 V 1015||0.8 1015||0.8 1015||0.8 1015||0.8 Ω||pF OPEN-LOOP GAIN VOUT at ±10 V, RL = 10 kΩ
300
1000
300
1000
300
1000
300
1000 V/mV VOUT at ±10 V, RL = 10 kΩ,
300
800
300
800
300
800
300
800 V/mV TMIN to TMAX VOUT = ±10 V, RL = 2 kΩ
100
250
100
250
100
250
100
250 V/mV VOUT = ±10 V, RL = 2 kΩ,
80
200
80
200
80
200
25
150 V/mV TMIN to TMAX INPUT VOLTAGE RANGE Differential3 ±20 ±20 ±20 ±20 V Common-Mode Voltage
−10 +10 −10 +10 −10 +10 −10 +10
V Common-Mode Rejection Ratio −10 V ≤ VCM ≤ +10 V
80
90
90
100
90
100
90
100 dB TMIN to TMAX
76
80
80
90
80
90
80
90 dB OUTPUT CHARACTERISTICS VOUT at RL = 10 kΩ, TMIN to
−12 +12 −12 +12 −12 +12 −12 +12
V TMAX VOUT at RL = 2 kΩ, TMIN to TMAX
−10 +10 −10 +10 −10 +10 −10 +10
V Short-Circuit Current
15
20
35 15
20
35 15
20
35 15
20
35
mA TMIN to TMAX
9 9 9 6
mA Load Capacitance Stability, 4000 4000 4000 4000 pF G = +1 Rev. K | Page 3 of 18 Document Outline FEATURES APPLICATIONS CONNECTION DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS FUNCTIONAL DESCRIPTION MINIMIZING INPUT CURRENT CIRCUIT BOARD NOTES OFFSET NULLING AC RESPONSE WITH HIGH VALUE SOURCE AND FEEDBACK RESISTANCE COMMON-MODE INPUT VOLTAGE OVERLOAD DIFFERENTIAL INPUT VOLTAGE OVERLOAD INPUT PROTECTION SAMPLE-AND-DIFFERENCE CIRCUIT TO MEASURE ELECTROMETER LEAKAGE CURRENTS PHOTODIODE INTERFACE Photodiode Preamp Noise LOG RATIO AMPLIFIER TEMPERATURE COMPENSATED pH PROBE AMPLIFIER OUTLINE DIMENSIONS ORDERING GUIDE