AD7478
PRODUCTION8-Bit, 1 MSPS, Low Power Successive Approximation ADC Which Operates From A Single 2.35 V to 5.25 V Power Supply
- Part Models
- 3
- 1ku List Price
- Starting From $1.06
Overview
- Fast Throughput Rate: 1 MSPS
- Specified for VDD of 2.35 V to 5.25 V
- Low Power:
3.6 mW Typ at 1 MSPS with 3 V Supplies
15 mW Typ at 1 MSPS with 5 V Supplies - Wide Input Bandwidth: 70 dB SNR at 100 kHz Input Frequency
- Flexible Power/Serial Clock Speed Management
- No Pipeline Delays
- High Speed Serial Interface
SPI®/QSPI™/MICROWIRE™/DSP Compatible - Standby Mode: 1 µA Max
- 6-Lead SOT-23 Package
The AD7476 / AD7477 / AD7478 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz.
The conversion process and data acquisition are controlled using CS the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is initiated at this point. There are no pipeline delays associated with these parts.
The AD7476 / AD7477 / AD7478 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the parts are 0 V to VDD. The conversion rate is determined by the SCLK.
PRODUCT HIGHLIGHTS
- First 12-/10-/8-Bit ADCs in SOT-23 Packages.
- High Throughput with Low Power Consumption.
- Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced while not converting. The parts also feature a shutdown mode to maximize power efficiency at lower throughput rates. Current consumption is 1 μA maximum when in shutdown mode.
- Reference Derived from the Power Supply.
- No Pipeline Delay. The parts feature a standard successive-approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.
APPLICATIONS
- Battery-powered systems
Personal digital assistants
Medical instruments
Mobile communications - Instrumentation and control systems
- Data acquisition systems
- High speed modems
- Optical sensors
Documentation
Data Sheet 1
Application Note 2
Technical Articles 1
Product Highlight 1
Device Drivers 2
Product Highlight 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7478ARTZ-500RL7 | 6-Lead SOT-23 | ||
| AD7478ARTZ-REEL7 | 6-Lead SOT-23 | ||
| AD7478SRTZ-REEL7 | 6-Lead SOT-23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 16, 2017 - 16_0291 CANCELLED: Addition of Amkor Philippines as Alternate Assembly Site for 5L, 6L and 8L SOT23 Chip-On-Lead Packages |
||
| AD7478ARTZ-500RL7 | PRODUCTION | |
| AD7478ARTZ-REEL7 | PRODUCTION | |
| AD7478SRTZ-REEL7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| AD7478ARTZ-500RL7 | PRODUCTION | |
| AD7478ARTZ-REEL7 | PRODUCTION | |
|
Feb 4, 2010 - 10_0009 Halogen Free Material Change for SOT_23 Products |
||
| AD7478ARTZ-500RL7 | PRODUCTION | |
| AD7478ARTZ-REEL7 | PRODUCTION | |
| AD7478SRTZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 0
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Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Operational Amplifiers (Op Amps) 3 | ||
| AD8021 | PRODUCTION | Low Noise, High Speed Amplifier for 16-Bit Systems |
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| ADA4899-1 | PRODUCTION | Unity-Gain Stable, Ultralow Distortion, 1 nV/√Hz Voltage Noise, High Speed Op Amp |
| Voltage References 3 | ||
| REF193 | PRODUCTION | 3.0V Precision Micropower, Low Dropout, Low Voltage Reference |
| REF195 | PRODUCTION | 5.0V Precision Micropower, Low Dropout, Low Voltage Reference |
| AD780 | PRODUCTION | 2.5 V/3.0 V High Precision Reference |