Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

ADC

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Lifecycle Status Mount Packaging Published Series Pbfree Code Part Status Moisture Sensitivity Level (MSL) Number of Terminations ECCN Code Max Operating Temperature Min Operating Temperature Operating Supply Voltage Length RoHS Status Lead Free Contact Plating Radiation Hardening Number of Pins Additional Feature Package / Case Interface Max Supply Voltage REACH SVHC Reach Compliance Code Min Supply Voltage Height Width Thickness Mounting Type Operating Temperature Technology Input Type Max Supply Voltage (DC) Min Supply Voltage (DC) Height Seated (Max) HTS Code Number of Functions Nominal Supply Current Max Input Voltage JESD-609 Code Terminal Finish Terminal Position Terminal Form Peak Reflow Temperature (Cel) Supply Voltage Time@Peak Reflow Temperature-Max (s) Base Part Number Pin Count Temperature Grade Surface Mount Terminal Pitch JESD-30 Code Signal to Noise Ratio (SNR) Operating Temperature (Max) Operating Temperature (Min) Number of Channels Subcategory Qualification Status Power Supplies Max Power Dissipation Number of Elements Configuration Feature Polarity Min Input Voltage Power Dissipation Power Dissipation-Max Number of Inputs Power Consumption Input Capacitance Resolution Number of Analog Inputs Number of Bits Supply Current-Max Supply Type Number of Converters Number of Analog In Channels Output Bit Code Number of A/D Converters Analog Input Voltage-Max Output Format Negative Supply Voltage-Nom Analog Input Voltage-Min Sampling Rate Conversion Rate Integral Nonlinearity (INL) Differential Nonlinearity Converter Type Linearity Error-Max (EL) Sample and Hold / Track and Hold Conversion Time-Max Architecture Reference Type Data Interface Sampling Rate (Per Second) Input Bit Code Input Format Spurious-free dynamic range (SFDR) Voltage - Supply, Analog Voltage - Supply, Digital Ratio - S/H:ADC
AD7898AR-10REEL7 AD7898AR-10REEL7 Rochester Electronics, LLC 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) no Obsolete 1 (Unlimited) 8 4.9mm Non-RoHS Compliant 8-SOIC (0.154, 3.90mm Width) unknown 3.9mm Surface Mount -40°C~85°C Single Ended 1 e0 TIN LEAD DUAL GULL WING 240 5V 30 8 YES R-PDSO-G8 COMMERCIAL S/H-ADC 1 12 1 2'S COMPLEMENT BINARY SERIAL 0.22 MHz ADC, SUCCESSIVE APPROXIMATION 0.0244% TRACK 3.3μs SAR External SPI 220k 5V 1:1
MAX1111EEE/V+T MAX1111EEE/V+T Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 6 Weeks Tape & Reel (TR) 2011 yes Active 1 (Unlimited) 16 EAR99 5.5V 4.9mm ROHS3 Compliant 16-SSOP (0.154, 3.90mm Width) SPI, Serial Surface Mount -40°C~85°C CMOS Differential, Single Ended 1 e3 Matte Tin (Sn) DUAL GULL WING 260 NOT SPECIFIED MAX1111 16 YES 0.635mm Analog to Digital Converters Not Qualified 3/5V 667mW MUX-S/H-ADC Bipolar, Unipolar 2, 4 1 B 8 4 2'S COMPLEMENT BINARY 1 50 ksps 50 ksps D/A CONVERTER TRACK SAR External, Internal SPI 50k 2.7V~5.5V 2.7V~5.5V 1:1
TLV0831IPE4 TLV0831IPE4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 yes 8 EAR99 85°C -40°C 3.6V 9.59mm RoHS Compliant Contains Lead 8 P SPI, Serial 7.62mm CMOS 3.6V 2.7V 1 200μA e4 DUAL THROUGH-HOLE 3.3V 8 INDUSTRIAL NO 2.54mm Analog to Digital Converters Not Qualified 3.3V 1 1 B 8 Single 1 BINARY 3.65V -0.05V 49 ksps 49 ksps 0.0977%
LTC2480IDD#TRPBF LTC2480IDD#TRPBF Linear Technology / Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks PRODUCTION (Last Updated: 3 weeks ago) Surface Mount Tape & Reel (TR) 2014 Active 1 (Unlimited) 10 EAR99 3mm ROHS3 Compliant 10 10-WFDFN Exposed Pad SPI, Serial 5.5V 2.7V 3mm Surface Mount -40°C~85°C CMOS Differential 0.8mm 1 e3 Matte Tin (Sn) DUAL NO LEAD 260 5V 30 LTC2480 10 0.5mm Analog to Digital Converters Not Qualified 3/5V 1 MUX-ADC Temperature Sensor Bipolar 2 B 16 Single 1 BINARY 7.5 sps ADC, DELTA-SIGMA Sigma-Delta External SPI 7.5 2.7V~5.5V 2.7V~5.5V
EVAL-AD7654EDZ EVAL-AD7654EDZ Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Non-RoHS Compliant Contains Lead 2 B
MCP33121D-05T-E/MN MCP33121D-05T-E/MN Microchip Technology 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks Tape & Reel (TR) Automotive, AEC-Q100 Active 1 (Unlimited) 10 3mm 10-WFDFN Exposed Pad 3mm Surface Mount -40°C~125°C Differential 0.8mm 1 DUAL NO LEAD 1.8V YES 0.5mm ADC 1 14 1 2'S COMPLEMENT BINARY SERIAL 0.5 MHz SAR External SPI 500k 1.7V~1.9V 1.7V~5.5V 0:1
LTC1605-2IG#TRPBF LTC1605-2IG#TRPBF Analog Devices Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download PRODUCTION (Last Updated: 3 months ago) Surface Mount 85°C -40°C RoHS Compliant Lead Free 28 SSOP Parallel 80mW 16 Analog, Digital 1 100 ksps
ADC0808S125HW-C18 ADC0808S125HW-C18 Renesas Electronics America 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) Obsolete 3 (168 Hours) Non-RoHS Compliant 48-TQFP Exposed Pad Surface Mount -40°C~85°C Differential S/H-ADC 1 8 External, Internal Parallel 125M 3V~3.6V 1.65V~1.95V 1:1
LTC1860LCS8#PBF LTC1860LCS8#PBF Linear Technology / Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks PRODUCTION (Last Updated: 2 weeks ago) Surface Mount Tube 2003 Active 1 (Unlimited) 8 EAR99 3V 4.9025mm ROHS3 Compliant Lead Free 8 8-SOIC (0.154, 3.90mm Width) SPI, Serial 3.6V 2.7V Surface Mount 0°C~70°C CMOS Differential, Single Ended 1 e3 Matte Tin (Sn) DUAL GULL WING 260 3V 30 LTC1860 8 Analog to Digital Converters Not Qualified 1.25mW 1 S/H-ADC Unipolar 400mW 1.5 B 12 Single 1 BINARY 2.5V 150 ksps 1 LSB ADC, SUCCESSIVE APPROXIMATION 0.0244% SAMPLE 4.66μs SAR External SPI 150k 2.7V~3.6V 2.7V~3.6V 1:1
ADS-CCD1201MM-C ADS-CCD1201MM-C Datel 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Non-RoHS Compliant 8542.39.00.01 OFFSET BINARY ADC, FLASH METHOD
ADS8329IBRSARG4 ADS8329IBRSARG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount Tape and Reel 2 (1 Year) 16 EAR99 85°C -40°C 5V 4mm RoHS Compliant Lead Free Gold 16 VQFN SPI 5.5V 2.7V 4mm CMOS 1 7mA e4 QUAD NO LEAD 260 5V NOT SPECIFIED 16 INDUSTRIAL 0.65mm 88.5 dB Analog to Digital Converters Not Qualified 1 Unipolar 44mW 48mW 15mW 2 B 16 Single 1 BINARY 5V SERIAL 1 Msps 1 Msps 1.75 LSB 1 LSB ADC, SUCCESSIVE APPROXIMATION 0.0027% SAMPLE
MAX155BEWI+T MAX155BEWI+T Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 12 Weeks Surface Mount Tape & Reel (TR) 2003 yes Active 1 (Unlimited) 28 EAR99 5V ROHS3 Compliant Lead Free 28-SOIC (0.295, 7.50mm Width) 7.5mm Surface Mount -40°C~85°C Differential, Single Ended 2.65mm 1 e3 Matte Tin (Sn) GULL WING 260 5V 30 MAX155 28 Analog to Digital Converters Not Qualified 1W S/H-MUX-ADC Selectable Address, Simultaneous Sampling Bipolar, Unipolar 4, 8 1 B 8 Dual 8 BINARY 1 -5V -0.3V 250 ksps 250 ksps ADC, SUCCESSIVE APPROXIMATION 0.3906% TRACK SAR External, Internal Parallel 250k ±5V 5V ±5V 5V 8:1
ADS7824UB ADS7824UB Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 3 days ago) Tube yes Active 3 (168 Hours) 28 EAR99 5V 17.9mm ROHS3 Compliant Lead Free Gold No 28 28-SOIC (0.295, 7.50mm Width) Parallel, Serial 5.25V 4.75V 2.65mm 7.5mm 2.35mm Surface Mount -40°C~85°C CMOS Single Ended 5.25V 4.75V 1 100mA e4 DUAL GULL WING 260 5V ADS7824 28 YES 73 dB 4 Analog to Digital Converters 5V 50mW 1 S/H-ADC Bipolar 50mW 50mW 1.5 B 12 Single 4 2'S COMPLEMENT BINARY 1 SERIAL, PARALLEL, 8 BITS 40 ksps 40 ksps 0.5 LSB 0.5 LSB ADC, SUCCESSIVE APPROXIMATION SAMPLE SAR External, Internal SPI, Parallel 40k 90 dB 1:1
ADC124S101CIMMX/NOPB ADC124S101CIMMX/NOPB Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 2 days ago) Surface Mount Tape & Reel (TR) yes Active 1 (Unlimited) 10 EAR99 5V 3mm ROHS3 Compliant Lead Free Tin No 10 10-TFSOP, 10-MSOP (0.118, 3.00mm Width) Parallel, SPI, Serial 5.25V 2.7V 1.07mm 3mm 1.02mm Surface Mount -40°C~85°C CMOS Single Ended 1 e3 DUAL GULL WING 260 3V ADC124S101 10 0.5mm 72.4 dB 4 Analog to Digital Converters 875mW 1 MUX-S/H-ADC Unipolar 4.3mW 1.5 B 12 3mA Single 4 BINARY 1 1 Msps 1 Msps -1.2 LSB ADC, SUCCESSIVE APPROXIMATION TRACK SAR Supply SPI, DSP 1M 2.7V~5.25V 2.7V~5.25V 1:1
AD574ALN AD574ALN Rochester Electronics, LLC 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube no Obsolete 3 (168 Hours) 28 37.4mm Non-RoHS Compliant 28-DIP (0.600, 15.24mm) Through Hole 0°C~70°C BIPOLAR 6.35mm 1 e0 TIN LEAD DUAL 240 15V 30 28 NO 2.54mm R-PDIP-T28 12 1 BINARY 1 -15V ADC, SUCCESSIVE APPROXIMATION 35μs Parallel 28.6k
LTC1405IGN#TR LTC1405IGN#TR Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Surface Mount 85°C -40°C RoHS Compliant Contains Lead SSOP Parallel 145mW 12 Dual 1 5 Msps
ADS1211UG4 ADS1211UG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 6 Weeks ACTIVE (Last Updated: 3 days ago) Tube yes Active 2 (1 Year) 24 EAR99 5V 15.4mm ROHS3 Compliant Lead Free Gold No 24-SOIC (0.295, 7.50mm Width) SPI, Serial 5.25V 4.75V 2.65mm 7.5mm 2.35mm Surface Mount -40°C~85°C Differential 5.25V 4.75V 1 3.5mA e4 DUAL GULL WING 260 5V ADS1211 24 YES 4 Analog to Digital Converters 5V 60mW 1 MUX-PGA-ADC PGA Bipolar, Unipolar 37mW 27.5mW 3 B 24 Analog, Digital 4 OFFSET BINARY, 2'S COMPLEMENT BINARY 1 16 ksps 16 ksps 1 LSB ADC, DELTA-SIGMA SAMPLE Sigma-Delta External, Internal SPI 16k
LTC1860IS8 LTC1860IS8 Analog Devices, Inc. 12.8166
Add to Cart

Min: 1

Mult: 1

0.00000000 Surface Mount Bulk 85°C -40°C RoHS Compliant Contains Lead SOIC SPI, Serial 1.25mW 12 Single 1 250 ksps
MAX1242ACPA MAX1242ACPA Rochester Electronics, LLC 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube no Obsolete 1 (Unlimited) 8 9.375mm Non-RoHS Compliant 8-DIP (0.300, 7.62mm) 7.62mm Through Hole 0°C~70°C CMOS Single Ended 4.572mm 1 e0 TIN LEAD DUAL 240 5.25V 20 8 NO 2.54mm R-PDIP-T8 COMMERCIAL S/H-ADC 1 10 1 BINARY 2.5V SERIAL 73 MHz ADC, SUCCESSIVE APPROXIMATION 0.0488% TRACK 7.5μs SAR External, Internal SPI 73k 2.7V~5.25V 2.7V~5.25V 1:1
LTC1605-1IG#PBF LTC1605-1IG#PBF Linear Technology/Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks Tube Active 1 (Unlimited) 28 EAR99 ROHS3 Compliant 28-SSOP (0.209, 5.30mm Width) 5.3mm Surface Mount -40°C~85°C CMOS Single Ended 2mm 1 e3 Matte Tin (Sn) DUAL GULL WING 260 5V 30 LTC1605 28 YES 0.65mm R-PDSO-G28 Not Qualified S/H-ADC 1 16 1 BINARY 4V ADC, SUCCESSIVE APPROXIMATION 0.0046% SAMPLE 8μs SAR External, Internal Parallel 100k 5V 1:1
ADS828EG4 ADS828EG4 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 Rail/Tube yes 2 (1 Year) 28 EAR99 85°C -40°C 5V 10.2mm RoHS Compliant Lead Free Gold No 28 SSOP Parallel 5.25V No SVHC 4.75V 1.95mm 5.3mm CMOS 5V 3V 1 68mA e4 DUAL GULL WING 260 5V 28 INDUSTRIAL YES 0.65mm 57 dB Analog to Digital Converters 5V 1 Bipolar 385mW 385mW 340mW 1.25 B 10 Single 1 OFFSET BINARY 75 Msps 75 Msps 3 LSB 1 LSB ADC, PROPRIETARY METHOD 0.293% TRACK 68 dB
LTC1860LIS8#TRPBF LTC1860LIS8#TRPBF Linear Technology/Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks Tape & Reel (TR) 2003 Active 1 (Unlimited) 8 EAR99 4.9025mm ROHS3 Compliant 8-SOIC (0.154, 3.90mm Width) 3.899mm Surface Mount -40°C~85°C Differential, Single Ended 1 e3 Matte Tin (Sn) DUAL GULL WING 260 3V 30 LTC1860 8 YES R-PDSO-G8 Not Qualified S/H-ADC 1 12 1 BINARY 2.5V SERIAL ADC, SUCCESSIVE APPROXIMATION 0.0244% SAMPLE 4.66μs SAR External SPI 150k 2.7V~3.6V 2.7V~3.6V 1:1
ADC0848CCN/NOPB ADC0848CCN/NOPB Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Through Hole Tube yes Obsolete 1 (Unlimited) 24 EAR99 5V 26.42mm ROHS3 Compliant Lead Free Tin No 24 24-DIP (0.300, 7.62mm) 6V No SVHC 4.5V 3.302mm 6.604mm Through Hole 0°C~70°C CMOS Differential, Pseudo-Differential, Single Ended 1 1mA e3 DUAL 5V ADC0848 24 2.54mm Analog to Digital Converters 5V 875mW 1 MUX-ADC Unipolar 875mW 4, 8 15mW 1 B 8 8 BINARY 5V 25 ksps 25 ksps ADC, SUCCESSIVE APPROXIMATION 0.3906% SAR External Parallel 25k 4.5V~6V 4.5V~6V
AD1959YRSRL AD1959YRSRL Rochester Electronics, LLC 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) no Obsolete 1 (Unlimited) 28 10.2mm Non-RoHS Compliant WITH PROGRAMMABLE PLL 28-SSOP (0.209, 5.30mm Width) 5.3mm Surface Mount 2mm 1 e0 TIN LEAD DUAL GULL WING 240 5V 30 28 INDUSTRIAL YES 0.65mm R-PDSO-G28 105°C -40°C COMMERCIAL 16 D/A CONVERTER 2'S COMPLEMENT SERIAL
MAX1240CEPA+ MAX1240CEPA+ Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Through Hole yes 1 (Unlimited) 8 EAR99 85°C -40°C 3.6V 9.375mm RoHS Compliant Lead Free DIP SPI, Serial 7.62mm BICMOS 4.572mm 1 e3 Matte Tin (Sn) DUAL 260 3V NOT SPECIFIED 8 INDUSTRIAL 2.54mm 70 dB Analog to Digital Converters Not Qualified 3/3.3V Unipolar 727mW 1.5 B 1 12 Single 1 BINARY 3.65V 73 ksps 73 ksps ADC, SUCCESSIVE APPROXIMATION 0.0244% TRACK
AD7475BRMZ-REEL7 AD7475BRMZ-REEL7 Analog Devices Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks PRODUCTION (Last Updated: 3 weeks ago) Tape & Reel (TR) no Active 1 (Unlimited) 8 EAR99 3mm ROHS3 Compliant Contains Lead 8 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) SPI, Serial 3mm Surface Mount -40°C~85°C Single Ended 1 2.525V e3 Matte Tin (Sn) DUAL GULL WING 260 3V 30 AD7475 8 YES 0.65mm 68 dB 1 Analog to Digital Converters Not Qualified 3/5V 10.5mW S/H-ADC Unipolar 2.475V 10.5mW 20pF 1.5 B 12 Single 1 BINARY 1 Msps 1 LSB -0.9 LSB ADC, SUCCESSIVE APPROXIMATION 0.0244% TRACK SAR External SPI, DSP 1M 2.7V~5.25V 2.7V~5.25V 1:1
LTC1605-1CG#TRPBF LTC1605-1CG#TRPBF Analog Devices, Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download PRODUCTION (Last Updated: 3 months ago) Surface Mount Tape & Reel (TR) 70°C 0°C 5V RoHS Compliant Lead Free 28 SSOP Parallel 5.25V 4.75V 1 Unipolar 80mW 80mW 2 B 16 Analog, Digital 1 100 ksps 3 LSB
LTC2306CDD#TRPBF LTC2306CDD#TRPBF Linear Technology / Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 14 Weeks Tape & Reel (TR) 2010 Active 1 (Unlimited) 10 EAR99 3mm ROHS3 Compliant 10-WFDFN Exposed Pad 3mm Surface Mount 0°C~70°C CMOS Differential, Single Ended 0.8mm 1 e3 Matte Tin (Sn) DUAL NO LEAD 260 5V 30 LTC2306 10 YES 0.5mm Analog to Digital Converters Not Qualified 5V MUX-S/H-ADC 2 12 1 1 SERIAL 0.5 MHz ADC, SUCCESSIVE APPROXIMATION SAMPLE SAR External SPI 500k 5V 1:1
HI5746KCBZ HI5746KCBZ Renesas Electronics America Inc. 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube Obsolete 3 (168 Hours) 28 ROHS3 Compliant 28-SOIC (0.295, 7.50mm Width) Surface Mount 0°C~70°C CMOS Differential, Single Ended 1 e3 Matte Tin (Sn) DUAL GULL WING 5V HI5746 28 YES R-PDSO-G28 S/H-ADC 1 10 1 OFFSET BINARY, 2'S COMPLEMENT BINARY 0.5V -0.5V 40 MHz ADC, FLASH METHOD SAMPLE 0.025μs Pipelined External Parallel 40M 5V 1:1
LTC1594LIS#TRPBF LTC1594LIS#TRPBF Linear Technology/Analog Devices 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 16 Weeks Tape & Reel (TR) 2004 microPOWER™ Active 1 (Unlimited) 16 EAR99 9.9mm ROHS3 Compliant 16-SOIC (0.154, 3.90mm Width) 3.899mm Surface Mount -40°C~85°C CMOS Single Ended 1 e3 Matte Tin (Sn) DUAL GULL WING 260 3V 30 LTC1594 16 YES Not Qualified MUX-S/H-ADC 4 12 4 BINARY 1 3.65V SERIAL -0.05V ADC, SUCCESSIVE APPROXIMATION 0.0732% SAMPLE SAR External SPI 16.8k 5V 1:1
Settings Need Help?
Top FAQ's

How can I quickly find answers to my questions?

Please visit the Help & Support area of our website to find information regarding ordering, shipping, delivery and more.

What is my Order Status?

Registered users can track orders from their account dropdown, or click here. *Order Status may take 12 hours to update after initial order is placed.

How do I return product?

Users can begin the returns process by starting with our Returns Page.

How do I find price and availability?

Quotes can be created by registered users in myLists.

How do I create a 'HK JDW' Account?

Visit the Registration Page and enter the required information. You will receive an email confirmation when your registration is complete.

United Kingdom/GBP Summary
Fast Shipping Fast Delivery

Orders are typically delivered to United Kingdom within 48 hours depending on location.

Free Shipping Free Shipping

Free delivery to United Kingdom on orders of £33 or more. A delivery charge of £12 will be billed on all orders less than £33.

Incoterms Incoterms

DDP (Duty and customs paid by HK JDW)

Payment Options Payment Types

Credit account for qualified institutions and businesses

Payment in Advance by Wire Transfer

Visa Mastercard American Express PayPal Apple Pay Google Pay

Marketplace Marketplace Product

More Products From Fully Authorized Partners

Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.

Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)

For more information visit Help & Support