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LTC2484IDD#PBF

IC ADC 24BIT 10-DFN

Part Number: LTC2484IDD#PBF

Manufacturer: Analog Devices Inc.

Category: Analog to Digital Converters (ADC)

Package: 10-WFDFN Exposed Pad

Datasheet:: LTC2484IDD#PBF.pdf

Description: IC ADC 24BIT 10-DFN

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LTC2484IDD#PBF 24-Bit Delta-Sigma ADC with Easy Drive Input Current Cancellation

A comprehensive technical overview of the LTC2484IDD#PBF, a 24-bit No Latency Delta-Sigma analog-to-digital converter with patented Easy Drive technology from Analog Devices. Covers device function, core features, electrical specifications, 10-lead DFN package, pin configuration, typical applications, and replacement selection guidance.

Analog Devices / Linear Technology 10-Lead DFN (3mm x 3mm) 2.7V to 5.5V

Device Classification 24-Bit Delta-Sigma ADC

Part Number: LTC2484IDD#PBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the LTC2484IDD#PBF?

LTC2484IDD#PBF is a 24-bit No Latency Delta-Sigma analog-to-digital converter from Analog Devices (formerly Linear Technology) featuring patented Easy Drive input current cancellation technology. The device eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current.[reference:0]

The LTC2484IDD#PBF allows large external source impedances and input signals with rail-to-rail input range to be directly digitized while maintaining exceptional DC accuracy. The device includes an on-chip oscillator and can be configured to reject line frequencies - 50Hz, 60Hz or simultaneous 50Hz/60Hz rejection can be selected, as well as a 2× speed-up mode.[reference:1]

The ADC supports a wide common mode input range (0V to VCC) independent of the reference voltage. The reference can be as low as 100mV or tied directly to VCC.[reference:2] With 2ppm INL, no missing codes, 600nVRMS noise, and 1ppm offset, the LTC2484IDD#PBF delivers high-precision conversion for demanding measurement applications.[reference:3]

Easy Drive Technology Zero differential input current enables direct digitization of high-impedance sensors with full accuracy.[reference:4]

High Precision 2ppm INL, no missing codes, 1ppm offset, and 15ppm total unadjusted error.[reference:5]

Flexible Rejection Modes Programmable 50Hz, 60Hz or simultaneous 50Hz/60Hz line frequency rejection.[reference:6]

DEVICE HIGHLIGHTS

Key Features and Benefits of LTC2484IDD#PBF

Easy Drive Input Current Cancellation

Patented sampling scheme eliminates dynamic input current errors and on-chip buffering shortcomings, allowing direct digitization of high-impedance sensors with rail-to-rail inputs.[reference:7]

Ultra-Low Noise & High Precision

600nVRMS noise, 2ppm INL with no missing codes, 1ppm offset and 15ppm total unadjusted error ensure exceptional DC accuracy for demanding measurements.[reference:8]

Programmable Line Frequency Rejection

Selectable 50Hz, 60Hz or simultaneous 50Hz/60Hz rejection, plus a 2× speed-up mode (15Hz using internal oscillator) for flexible noise filtering.[reference:9]

Wide Supply & Reference Range

Single supply 2.7V to 5.5V operation. Reference voltage can be as low as 100mV or tied directly to VCC.[reference:10]

No Latency & Single-Cycle Settling

Digital filter settles in a single cycle - no latency - enabling fast, accurate conversions without waiting for filter settling.[reference:11]

Tiny Package & Internal Oscillator

Available in a tiny 3mm × 3mm 10-lead DFN package. On-chip trimmed oscillator eliminates the need for external crystals.[reference:12][reference:13]

REFERENCE DATA

Technical Specifications for LTC2484IDD#PBF

Part Number	LTC2484IDD#PBF	Manufacturer	Analog Devices Inc. (Linear Technology)
Device Type	24-Bit Delta-Sigma ADC	Resolution	24 Bits (No Missing Codes)[reference:14]
Supply Voltage	2.7V to 5.5V[reference:15]	Number of Channels	1 (Differential)
Sampling Rate (Normal)	7.5 SPS	Sampling Rate (2× Speed)	15 SPS[reference:16]
Input Common Mode Range	GND to VCC[reference:17]	Input Voltage Range	±0.5 × VREF
INL	2ppm (No Missing Codes)[reference:18]	Offset Error	1ppm[reference:19]
Total Unadjusted Error	15ppm[reference:20]	Noise	600nVRMS[reference:21]
CMRR	140dB	Reference Voltage Range	0.1V to VCC[reference:22]
Package	10-Lead DFN (3mm × 3mm)[reference:23]	Mounting Type	Surface Mount
Operating Temperature	-40°C to +85°C[reference:24]	Moisture Sensitivity Level	MSL 1

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for LTC2484IDD#PBF

Conversion Timing & Speed Modes

The LTC2484IDD#PBF operates in two speed modes:

Normal Speed: 7.5 SPS with 50Hz/60Hz rejection[reference:25]
2× Speed Mode: 15 SPS using internal oscillator[reference:26]
Line frequency rejection (50Hz, 60Hz or simultaneous) is programmable via the SDI pin[reference:27]
No Latency architecture means the digital filter settles in a single cycle[reference:28]

PCB and Power-Supply Guidance

ADC performance depends on layout, bypassing, and input routing:

Bypass VCC to GND with a 1µF tantalum capacitor in parallel with 0.1µF ceramic capacitor, placed as close to the part as possible[reference:29]
The exposed pad (Pin 11) is GND and must be soldered to the PCB[reference:30]
Keep analog input traces short and away from digital switching signals to maintain 24-bit accuracy
Verify the recommended PCB footprint from the official datasheet before production

10-LEAD DFN

Pin Configuration Reference for LTC2484IDD#PBF

LTC2484

DFN TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout.[reference:31]

1 SDI Serial Data Input - selects line frequency rejection mode[reference:32]

2 VCC Positive Supply Voltage (2.7V to 5.5V)[reference:33]

3 VREF Positive Reference Input (0.1V to VCC)[reference:34]

4 IN+ Non-Inverting Differential Analog Input[reference:35]

5 IN− Inverting Differential Analog Input[reference:36]

6 CS Chip Select (Active LOW) - enables I/O and wakes ADC[reference:37]

7 SDO Serial Data Output - three-state digital output[reference:38]

8 GND Ground

9 SCK Serial Clock Input/Output

10 fO Oscillator Frequency Control Input

APPLICATION AREAS

Typical Applications for LTC2484IDD#PBF

Direct Sensor Digitizer

Directly digitizes high-impedance sensors with full accuracy using Easy Drive technology.[reference:39]

Weight Scales

High-precision 24-bit conversion for electronic weighing and load cell measurement systems.[reference:40]

Direct Temperature Measurement

Built-in temperature sensor enables accurate temperature monitoring without external components.[reference:41]

Strain Gauge Transducers

Low noise (600nVRMS) and high INL (2ppm) ideal for precision strain measurement.[reference:42]

Instrumentation & Industrial Control

Demanding analog-to-digital conversion for data acquisition systems, medical equipment, and process control.[reference:43]

DVMs and Meters

High-accuracy digital voltmeters and precision measurement instruments.[reference:44]

REPLACEMENT GUIDANCE

Selecting an Alternative for LTC2484IDD#PBF

A replacement for the LTC2484IDD#PBF should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Resolution (24-bit, no missing codes)[reference:45]

Supply voltage range (2.7V–5.5V)[reference:46]

Easy Drive input current cancellation[reference:47]

INL (2ppm) and noise (600nVRMS)[reference:48]

Programmable 50Hz/60Hz rejection[reference:49]

Package (10-lead DFN, 3mm × 3mm)[reference:50]

No Latency / single-cycle settling[reference:51]

Pin-to-pin compatibility (note exposed pad)[reference:52]

Family alternatives: LTC2484CDD#PBF (0°C to 70°C), LTC2484CDD#TRPBF (tape and reel, 0°C to 70°C), LTC2484IDD#TRPBF (tape and reel, -40°C to 85°C)[reference:53]. Select based on operating temperature and packaging needs.

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MANUFACTURER INFORMATION

Analog Devices / Linear Technology

The LTC2484IDD#PBF belongs to the precision delta-sigma ADC portfolio of Linear Technology, now part of Analog Devices. The family is designed for high-accuracy, low-noise analog-to-digital conversion in industrial, medical, and portable instrumentation applications.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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LTC2484IDD#PBF Technical Information

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Specifications

Product Attribute: Attribute Value

Part Number: LTC2484IDD#PBF

Manufacturer: Analog Devices Inc.

Package: 10-WFDFN Exposed Pad

Series: -

Package/Case: 10-WFDFN Exposed Pad

Packaging: Tube

Product Status: Active

Number of Bits: 24

Sampling Rate (Per Second): 7.5

Number of Inputs: 1

Input Type: Differential

Data Interface: SPI

Configuration: MUX-ADC

Ratio - S/H:ADC: -

Number of A/D Converters: 1

Architecture: Sigma-Delta

Reference Type: External

Voltage - Supply, Analog: 2.7V ~ 5.5V

Voltage - Supply, Digital: 2.7V ~ 5.5V

Features: Temperature Sensor

Operating Temperature: -40°C ~ 85°C

Supplier Device Package: 10-DFN (3x3)

Mounting Type: Surface Mount

Grade: -

Qualification: -

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Part Number: LTC2484IDD#PBF

Manufacturer: Analog Devices Inc.

Package: 10-WFDFN Exposed Pad

Category: Analog to Digital Converters (ADC)

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