KA2902
Fairchild Semiconductor
IC OPAMP GP 4 CIRCUIT 10LLP
Op Lager173020 pcs
-
Bulk
-
26 V
3 V
-
-
-
-
1.5 mV
40 nA
-
-
-
13 mA
General Purpose
4
10-LLP (2.6x2.6)
10-WFDFN
-
Surface Mount
-40°C ~ 85°C
1mA
-
-
-
RFQ
LF353MX
Texas Instruments
IC OPAMP JFET 2 CIRCUIT 8SOIC
Op Lager65800 pcs
-
Bulk
-
36 V
36 V
-
-
-
-
5 mV
50 pA
4 MHz
-
13V/µs
-
J-FET
2
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
0°C ~ 70°C
3.6mA
-
-
-
RFQ
LMV824DGVR
Texas Instruments
IC OPAMP GP 4 CIRCUIT 14TVSOP
Op Lager16830 pcs
-
Tape & Reel (TR)
LMV824
5.5 V
2.5 V
-
-
-
-
1 mV
40 nA
5.5 MHz
-
1.9V/µs
45 mA
General Purpose
4
14-TVSOP
14-TFSOP (0.173", 4.40mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
1mA
LMV®
-
-
RFQ
LMC6574AIMX
Texas Instruments
IC OPAMP GP 220KHZ RRO 14SOIC
Op Lager11180 pcs
-
-
-
-
-
1 (Unlimited)
Contains lead / RoHS non-compliant
LMC6574
Tape & Reel (TR)
500µV
0.02pA
220kHz
2.7 V ~ 11 V
0.09 V/µs
6mA
General Purpose
4
14-SOIC
14-SOIC (0.154", 3.90mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
160µA
-
General Purpose Amplifier 4 Circuit Rail-to-Rail 14-SOIC
-
RFQ
ISO120G
Texas Instruments
IC OPAMP ISOLATION 1 CIRC 16CDIP
Op Lager264 pcs
60 kHz
Tube
ISO120
36 V
9 V
-
-
-
-
10 mV
-
-
-
2V/µs
15 mA
Isolation
1
16-CDIP
24-CDIP (0.300", 7.62mm), 16 Leads
-
Through Hole
-25°C ~ 85°C
4mA
-
-
-
RFQ
CLC502A/BPA
Rochester Electronics, LLC
IC OPAMP GP 1 CIRCUIT 8CDIP
Op Lager100 pcs
110 MHz
Bulk
-
10 V
10 V
-
-
-
-
1.6 mV
30 µA
-
-
500V/µs
45 mA
General Purpose
1
8-CDIP
8-CDIP (0.300", 7.62mm)
-
Through Hole
-55°C ~ 125°C (TA)
-
-
-
-
RFQ
LF353D
onsemi
IC OPAMP JFET 2 CIRCUIT 8SOIC
Op Lager102330 pcs
-
Tube
-
36 V
7 V
-
-
-
-
5 mV
50 pA
3 MHz
-
13V/µs
40 mA
J-FET
2
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
0°C ~ 70°C
3.6mA (x2 Channels)
-
-
-
RFQ
MAX4238AUT-T
Analog Devices Inc./Maxim Integrated
IC OPAMP GP 1 CIRCUIT SOT23-6
Op Lager35391 pcs
-
Bulk
-
5.5 V
2.7 V
-
-
-
-
0.1 µV
1 pA
1 MHz
-
0.35V/µs
40 mA
General Purpose
1
SOT-23-6
SOT-23-6
Single Ended, Rail-to-Rail
Surface Mount
-40°C ~ 125°C
600µA
-
-
-
RFQ
RC4156M
Fairchild Semiconductor
IC OPAMP GP 4 CIRCUIT 14SOIC
Op Lager10650 pcs
-
Bulk
-
20 V
20 V
-
-
-
-
1 mV
60 nA
3.5 MHz
-
1.6V/µs
25 mA
General Purpose
4
14-SOIC
14-SOIC (0.154", 3.90mm Width)
-
Surface Mount
0°C ~ 70°C
5mA
-
-
-
RFQ
OP484FSZ-REEL7
Analog Devices Inc.
IC OPAMP GP 4 CIRCUIT 14SOIC
Op Lager4466 pcs
-
Tape & Reel (TR)
OP484
36 V
3 V
-
-
-
-
250 µV
80 nA
4.25 MHz
-
4V/µs
10 mA
General Purpose
4
14-SOIC
14-SOIC (0.154", 3.90mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
-
-
-
-
RFQ
LM833MM
Texas Instruments
IC AUDIO 2 CIRCUIT 8VSSOP
Op Lager5770 pcs
-
Bulk
-
30 V
30 V
-
-
-
-
300 µV
500 nA
15 MHz
-
7V/µs
40 mA
Audio
2
8-VSSOP
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
-
Surface Mount
-40°C ~ 85°C
5mA (x2 Channels)
-
-
-
RFQ
EL5220CY-T13
Intersil
EL5220 - DUAL 12MHZ RAIL-RAIL OP
Op Lager42110 pcs
12 MHz
Bulk
-
16.5 V
4.5 V
-
-
-
-
2 mV
2 nA
8 MHz
-
10V/µs
30 mA
Voltage Feedback
2
8-MSOP
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
500µA (x2 Channels)
EL5220
-
-
RFQ
NJU7029RB1-TE1
Nisshinbo Micro Devices Inc.
IC CMOS 2 CIRCUIT 8TVSP
Op Lager73340 pcs
-
Tape & Reel (TR)
NJU7029
5.5 V
2.2 V
-
-
-
-
2 mV
1 pA
3 MHz
-
1V/µs
-
CMOS
2
8-TVSP
8-VSSOP, 8-MSOP (0.110", 2.80mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
850µA
-
-
-
RFQ
NJM072BV-TE2
Nisshinbo Micro Devices Inc.
IC OPAMP JFET 2 CIRCUIT 8SSOP
Op Lager13960 pcs
-
Tape & Reel (TR)
-
36 V
8 V
-
-
-
-
3 mV
30 pA
3 MHz
-
13V/µs
-
J-FET
2
8-SSOP
8-LSSOP (0.173", 4.40mm Width)
-
Surface Mount
-40°C ~ 85°C
3mA
-
-
-
RFQ
LMH6609MAX
Texas Instruments
IC OPAMP VFB 900MHZ 8SOIC
Op Lager13210 pcs
900MHz
-
-
-
-
1 (Unlimited)
Contains lead / RoHS non-compliant
LMH6609
Tape & Reel (TR)
800µV
2µA
-
6 V ~ 12 V, ±3 V ~ 6 V
1400 V/µs
90mA
Voltage Feedback
1
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
-40°C ~ 85°C
7mA
VIP10™
Voltage Feedback Amplifier 1 Circuit 8-SOIC
-
RFQ
ADA4310-1ARHZ-R7
Analog Devices Inc.
IC OPAMP CFA 2 CIRCUIT 10MSOP
Op Lager19137 pcs
190 MHz
Tape & Reel (TR)
ADA4310
12 V
5 V
-
-
-
-
1 mV
6 µA
-
-
820V/µs
-
Current Feedback
2
10-MSOP-EP
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
-
Surface Mount
-40°C ~ 85°C
7.6mA (x2 Channels)
-
-
-
RFQ
LTC2620IGN
Linear Technology
LTC2620 - OCTAL 12-BIT RAIL-TO-R
Op Lager15330 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
RFQ
OPA541BM
Texas Instruments
IC POWER 1 CIRCUIT TO3-8
Op Lager216 pcs
-
Tube
OPA541
80 V
20 V
-
-
-
-
100 µV
4 pA
1.6 MHz
-
10V/µs
10 A
Power
1
TO-3-8
TO-3-8
-
Through Hole
-25°C ~ 85°C
20mA
-
-
-
RFQ
LM611CM
Texas Instruments
IC OPAMP GP 800KHZ 14SOIC
Op Lager13980 pcs
-
-
-
-
-
1 (Unlimited)
Contains lead / RoHS non-compliant
LM611
Tube
1.5mV
25nA
800kHz
4 V ~ 32 V, ±2 V ~ 16 V
0.7 V/µs
25mA
General Purpose
1
14-SOIC
14-SOIC (0.154", 3.90mm Width)
-
Surface Mount
0°C ~ 70°C
210µA
Super-Block™
General Purpose Amplifier 1 Circuit 14-SOIC
-
RFQ
ISL1571IUEZ-T7
Renesas Electronics America Inc
IC OPAMP GP 2 CIRCUIT 10HMSOP
Op Lager17276 pcs
250 MHz
Tape & Reel (TR)
ISL1571
12 V
4.5 V
-
-
-
-
40 mV
7 µA
-
-
1200V/µs
1 A
General Purpose
2
10-HMSOP
10-VFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Differential
Surface Mount
-40°C ~ 85°C
15mA (x2 Channels)
-
-
-
RFQ
LMC6022IMX
Texas Instruments
IC OPAMP GP 350KHZ 8SOIC
Op Lager9020 pcs
-
-
-
-
-
1 (Unlimited)
Contains lead / RoHS non-compliant
LMC6022
Tape & Reel (TR)
1mV
0.04pA
350kHz
4.75 V ~ 15.5 V
0.11 V/µs
40mA
General Purpose
2
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
-40°C ~ 85°C
86µA
-
General Purpose Amplifier 2 Circuit 8-SOIC
-
RFQ
HA1-5104-2
Intersil
IC OPAMP GP 4 CIRCUIT 14CERDIP
Op Lager12000 pcs
8 MHz
Bulk
-
36 V
10 V
-
-
-
-
500 µV
130 nA
8 MHz
-
3V/µs
15 mA
General Purpose
4
14-CERDIP
14-DIP (0.300", 7.62mm)
-
Through Hole
-55°C ~ 125°C
5mA
-
-
-
RFQ
TL074CN
onsemi
IC OPAMP JFET 4 CIRCUIT 14DIP
Op Lager6500 pcs
-
Tube
-
30 V
10 V
-
-
-
-
3 mV
65 pA
3 MHz
-
13V/µs
40 mA
J-FET
4
14-PDIP
14-DIP (0.300", 7.62mm)
-
Through Hole
0°C ~ 70°C (TA)
1.4mA (x4 Channels)
-
-
-
RFQ
LT1210XFE#PBF
Linear Technology
LT1210X - 1.1A, 35MHz Current Fe
Op Lager17090 pcs
35 MHz
Bulk
-
30 V
10 V
-
-
-
-
3 mV
-
-
-
900V/µs
2 A
Current Feedback
1
16-TSSOP-EP
16-TSSOP (0.173", 4.40mm Width) Exposed Pad
-
Surface Mount
-40°C ~ 175°C
35mA
-
-
-
RFQ
OP462GSZ-REEL7
Analog Devices Inc.
IC OPAMP GP 4 CIRCUIT 14SOIC
Op Lager4290 pcs
-
Tape & Reel (TR)
OP462
12 V
2.7 V
-
-
-
-
25 µV
260 nA
15 MHz
-
13V/µs
30 mA
General Purpose
4
14-SOIC
14-SOIC (0.154", 3.90mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
550µA (x4 Channels)
-
-
-
RFQ
LM6171BIN
Texas Instruments
IC VOLTAGE FEEDBACK 1 CIRC 8DIP
Op Lager15893 pcs
160 MHz
Bulk
-
34 V
5.5 V
-
-
-
-
1.5 mV
1 µA
100 MHz
-
3600V/µs
116 mA
Voltage Feedback
1
8-PDIP
8-DIP (0.300", 7.62mm)
-
Through Hole
-40°C ~ 85°C
2.5mA
-
-
-
RFQ
OPA646U
Texas Instruments
IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
Op Lager8651 pcs
-
Bulk
-
11 V
9 V
-
-
-
-
3 mV
2 µA
-
-
180V/µs
-
Voltage Feedback
1
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
-40°C ~ 85°C (TA)
5.25mA
-
-
-
RFQ
LT1638HS8#PBF
Linear Technology
OPERATIONAL AMPLIFIER, 2 FUNC, 3
Op Lager4000 pcs
-
Bulk
-
44 V
2.5 V
-
-
-
-
250 µV
250 nA
1.2 MHz
-
0.4V/µs
40 mA
General Purpose
2
8-SO
8-SOIC (0.154", 3.90mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
205µA (x2 Channels)
-
-
-
RFQ
LM348M
Texas Instruments
IC OPAMP GP 4 CIRCUIT 14SOIC
Op Lager74260 pcs
-
Bulk
-
36 V
36 V
-
-
-
-
1 mV
30 nA
1 MHz
-
0.5V/µs
25 mA
General Purpose
4
14-SOIC
14-SOIC (0.154", 3.90mm Width)
-
Surface Mount
0°C ~ 70°C
2.4mA (x4 Channels)
-
-
-
RFQ
LM2902KNSR
Texas Instruments
IC OPAMP GP 4 CIRCUIT 14SO
Op Lager242440 pcs
-
Tape & Reel (TR)
LM2902
26 V
3 V
-
-
-
-
3 mV
20 nA
1.2 MHz
-
0.5V/µs
30 mA
General Purpose
4
14-SO
14-SOIC (0.209", 5.30mm Width)
-
Surface Mount
-40°C ~ 125°C (TA)
1.4mA (x4 Channels)
-
-
-
RFQ
OPA207IDBVT
Texas Instruments
IC OPAMP GP 1 CIRCUIT SOT23-5
Op Lager24379 pcs
-
Tape & Reel (TR)
OPA207
36 V
4.5 V
-
-
-
-
15 µV
200 pA
1.3 MHz
-
2.7V/µs
40 mA
General Purpose
1
SOT-23-5
SC-74A, SOT-753
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
350µA
-
-
-
RFQ
TLV9001UIDBVR
Texas Instruments
IC CMOS 1 CIRCUIT SOT23-5
Op Lager231440 pcs
-
Tape & Reel (TR)
TLV9001
5.5 V
1.8 V
-
-
-
-
400 µV
5 pA
1 MHz
-
2V/µs
40 mA
CMOS
1
SOT-23-5
SC-74A, SOT-753
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
60µA
-
-
-
RFQ
CLC428AJE
Texas Instruments
IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
Op Lager5840 pcs
160 MHz
Tube
-
12 V
5 V
-
-
-
-
1 mV
1.5 µA
135 MHz
-
500V/µs
70 mA
Voltage Feedback
2
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
-40°C ~ 85°C
11mA (x2 Channels)
-
-
-
RFQ
OPA569AIDWPRG4
Texas Instruments
IC OPAMP GP 1.2MHZ RRO 20SOPWR
Op Lager9033 pcs
-
-
-
-
-
2 (1 Year)
Lead free / RoHS Compliant
OPA569
Tape & Reel (TR)
500µV
1pA
1.2MHz
2.7 V ~ 5.5 V, ±1.35 V ~ 2.75 V
1.2 V/µs
2.4A
General Purpose
1
20-SO PowerPad
20-SOIC (0.295", 7.50mm Width) Exposed Pad
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
9mA
-
General Purpose Amplifier 1 Circuit Rail-to-Rail 20-SO PowerPad
-
RFQ
MAX4245AXT
Analog Devices Inc./Maxim Integrated
IC OPAMP GP 1 CIRCUIT SC70-6
Op Lager34411 pcs
-
Bulk
-
5.5 V
2.5 V
-
-
-
-
400 µV
10 nA
1 MHz
-
0.4V/µs
30 mA
General Purpose
1
SC-70-6
6-TSSOP, SC-88, SOT-363
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
375µA
-
-
-
RFQ
OPA2336EA/2K5G4
Texas Instruments
IC OPAMP GP 100KHZ RRO 8VSSOP
Op Lager37742 pcs
-
-
-
-
-
2 (1 Year)
Lead free / RoHS Compliant
OPA2336
Tape & Reel (TR)
60µV
1pA
100kHz
2.3 V ~ 5.5 V
0.03 V/µs
5mA
General Purpose
2
8-VSSOP
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
20µA
MicroAmplifier™
General Purpose Amplifier 2 Circuit Rail-to-Rail 8-VSSOP
11 Weeks
RFQ
MAX4165EUK
Analog Devices Inc./Maxim Integrated
IC OPAMP GP 1 CIRCUIT SOT23-5
Op Lager17770 pcs
-
Bulk
-
6.5 V
2.7 V
-
-
-
-
350 µV
50 nA
5 MHz
-
2V/µs
125 mA
General Purpose
1
SOT-23-5
SC-74A, SOT-753
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
1.3mA
-
-
-
RFQ
OP32GS-REEL
Analog Devices Inc.
IC OPAMP GP 1 CIRCUIT 8SOIC
Op Lager33809 pcs
-
Bulk
-
30 V
3 V
-
-
-
-
30 mV
1.5 nA
4.5 MHz
-
1.5V/µs
-
General Purpose
1
8-SOIC
8-SOIC (0.154", 3.90mm Width)
-
Surface Mount
-25°C ~ 85°C
450µA
-
-
-
RFQ
ADA4691-2ACPZ-R7
Analog Devices Inc.
IC OPAMP GP 2 CIRCUIT 10LFCSP
Op Lager41455 pcs
-
Tape & Reel (TR)
ADA4691
5 V
2.7 V
-
-
-
-
500 µV
0.5 pA
3.6 MHz
-
1.3V/µs
55 mA
General Purpose
2
10-LFCSP-UQ (2x2)
10-UFQFN, CSP
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
180µA (x2 Channels)
-
-
-
RFQ
LTC6091IUFE#TRPBF
Analog Devices Inc.
IC OPAMP GP 2 CIRCUIT 32QFN
Op Lager2444 pcs
-
Tape & Reel (TR)
LTC6091
140 V
9.5 V
-
-
-
-
330 µV
3 pA
12 MHz
-
21V/µs
90 mA
General Purpose
2
32(16)-QFN (4x6)
16-WFQFN Exposed Pad
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
2.8mA (x2 Channels)
-
-
-
RFQ
LMH6321MR
Texas Instruments
IC OPAMP BUFFER 110MHZ 8SOPWRPAD
Op Lager7571 pcs
110MHz
-
-
-
-
3 (168 Hours)
Contains lead / RoHS non-compliant
LMH6321
Tube
4mV
2µA
-
5 V ~ 32 V, ±2.5 V ~ 16 V
2900 V/µs
295mA
Buffer
1
8-SO PowerPad
8-PowerSOIC (0.154", 3.90mm Width)
-
Surface Mount
-40°C ~ 125°C
14.9mA
-
Buffer Amplifier 1 Circuit 8-SO PowerPad
-
RFQ
NJM2741F3-TE1
Nisshinbo Micro Devices Inc.
IC OPAMP GP 1 CIRCUIT SC88A
Op Lager128420 pcs
-
Tape & Reel (TR)
NJM2741
14 V
2.5 V
-
-
-
-
1 mV
100 nA
10 MHz
-
3.5V/µs
-
General Purpose
1
SC-88A
5-TSSOP, SC-70-5, SOT-353
Rail-to-Rail
Surface Mount
-40°C ~ 85°C
2.2mA
-
-
-
RFQ
MAX4014EUK
Analog Devices Inc./Maxim Integrated
SING-SUPPLY BUFFER WITH R-R O/P
Op Lager15295 pcs
200 MHz
Bulk
MAX4014
11 V
3.15 V
-
-
-
-
4 mV
5.4 µA
-
-
600V/µs
120 mA
Buffer, Voltage Feedback
1
SOT-23-5
SC-74A, SOT-753
Rail-to-Rail
Surface Mount
-40°C ~ 85°C (TA)
5.5mA
-
-
-
RFQ
LM224DTBR2G
Fairchild Semiconductor
OPERATIONAL AMPLIFIER, 4 FUNC, 5
Op Lager11580 pcs
-
Bulk
-
32 V
3 V
-
-
-
-
2 mV
90 nA
-
-
-
40 mA
General Purpose
4
14-TSSOP
14-TSSOP (0.173", 4.40mm Width)
-
Surface Mount
-25°C ~ 85°C
-
-
-
-
RFQ
CA5260AM
Intersil
IC OPAMP GP 2 CIRCUIT 8SOIC
Op Lager17720 pcs
-
Bulk
-
16 V
4.5 V
-
-
-
-
2 mV
5 pA
3 MHz
-
5V/µs
22 mA
General Purpose
2
8-SOIC
8-SOIC (0.154", 3.90mm Width)
Rail-to-Rail
Surface Mount
-55°C ~ 125°C
9mA (x2 Channels)
-
-
-
RFQ
LMV321IDCKRG4
Texas Instruments
IC OPAMP GP 1MHZ RRO SC70-5
Op Lager168880 pcs
-
-
-
-
-
1 (Unlimited)
Lead free / RoHS Compliant
LMV321
Tape & Reel (TR)
1.7mV
15nA
1MHz
2.7 V ~ 5.5 V, ±1.35 V ~ 2.75 V
1 V/µs
-
General Purpose
1
SC-70-5
5-TSSOP, SC-70-5, SOT-353
Rail-to-Rail
Surface Mount
-40°C ~ 125°C
130µA
-
General Purpose Amplifier 1 Circuit Rail-to-Rail SC-70-5
8 Weeks
RFQ
UA748CP
Texas Instruments
IC OPAMP GP 1 CIRCUIT 8DIP
Op Lager194800 pcs
-
Bulk
-
44 V
36 V
-
-
-
-
1 mV
80 nA
-
-
0.5V/µs
25 mA
General Purpose
1
8-PDIP
8-DIP (0.300", 7.62mm)
-
Through Hole
0°C ~ 70°C
1.7mA
-
-
-
RFQ
AD204JN
Analog Devices Inc.
IC OPAMP ISOLATION 2 CIRC 11DIP
Op Lager6080 pcs
-
Tube
AD204
16.5 V
13.5 V
-
-
-
-
15 mV
30 pA
5 kHz
-
-
2 mA
Isolation
2
11-PDIP
38-DIP (0.600", 15.24mm), 11 Leads
-
Through Hole
-40°C ~ 85°C
-
-
-
-
RFQ
RMPA2451
Fairchild Semiconductor
IC POWER 1 CIRCUIT 12QFP
Op Lager7820 pcs
-
Bulk
-
8 V
8 V
-
-
-
-
-
-
-
-
-
-
Power
1
12-QFP (5.08x5.08)
12-QFP
-
Surface Mount
-40°C ~ 85°C (TC)
-
-
-
-
RFQ
LM158J
Texas Instruments
IC OPAMP GP 2 CIRCUIT 8CDIP
Op Lager2664 pcs
-
Tube
LM158
32 V
3 V
-
-
-
-
2 mV
40 nA
1 MHz
-
-
40 mA
General Purpose
2
8-CDIP
8-CDIP (0.300", 7.62mm)
-
Through Hole
-55°C ~ 125°C
1mA
-
-
-
RFQ