AD7468: 1.6 V Micro-Power 8-Bit ADC
The AD7466/AD7467/AD7468* are 12-/10-/8-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 1.6 V to 3.6 V power ...続きを見る
AD7468: 1.6 V Micro-Power 8-Bit ADC
製品概要
The AD7466/AD7467/AD7468* are 12-/10-/8-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 1.6 V to 3.6 V power supply and feature throughput rates up to 200 kSPS with low power dissipation. The parts contain a low noise, wide bandwidth track-and-hold amplifier, which can handle input frequencies in excess of 3 MHz.
The conversion process and data acquisition are controlled using CS and 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 also initiated at this point. There are no pipeline delays associated with the part.
The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the part is 0 V to VDD. The conversion rate is determined by the SCLK.
Product Highlights
- Specified for supply voltages of 1.6 V to 3.6 V
- 12-, 10-, and 8-bit ADCs in SOT-23 and MSOP packages
- High throughput rate with low power consumption. Power consumption in normal mode of operation at 100 kSPS and 3 V is 0.9 mW maximum
- Flexible power/serial clock speed management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through increases in the serial clock speed. Automatic power-down after conversion allows the average power consumption to be reduced when in power-down. Current consumption is 0.1 μA maximum and 8 nA typically when in power-down
- Reference derived from the power supply
- No pipeline delay
- The part features a standard successive approximation ADC with accurate control of conversions via a CS input
Applications
*Protected by U.S. Patent No. 6,681,332
Data Sheet, Rev. C, 5/07
- 日本語データシート Rev 0, 10/2003 (pdf 562kB)
- 英語データシート Rev C, 05/2007 (pdf 578kB)
- (データシート利用上の注意)
Features
- Specified for VDD of 1.6 V to 3.6 V
- Low power:
0.62 mW typical at 100 kSPS with 3 V supplies
0.48 mW typical at 50 kSPS with 3.6 V supplies
0.12 mW typical at 100 kSPS with 1.6 V supplies - Fast throughput rate: 200 kSPS
- Wide input bandwidth:
71 dB SNR at 30 kHz input frequency
- Flexible power/serial clock speed management
- No pipeline delays
- High speed serial interface:
SPI/QSPI™/MICROWIRE™/DSP compatible - Automatic power-down
- Power-down mode: 8 nA typical
- 6-lead SOT-23 package
- 8-lead MSOP package
Diagrams
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- シンボル＆フットプリント
Functional Block Diagram
1.6 V Micro-Power 8-Bit ADC
Functional Block Diagram for AD7468