AD7908
PRODUCTION8-Channel, 1 MSPS, 8-Bit ADC with Sequencer in 20-Lead TSSOP
- Part Models
- 4
- 1ku List Price
- Starting From $2.50
Part Details
- Fast throughput rate: 1 MSPS
- Specified for AVDD of 2.7 V to
5.25 V - Low Power:
6.0 mW max at 1 MSPS with 3 V supply
13.5 mW max at 1 MSPS with 5 V supply - Eight (single-ended) inputs with sequencer
- Wide input bandwidth: AD7928,
70 dB min SINAD at 50 kHz input frequency - Flexible power/serial clock speed management
- No pipeline delays
- High speed serial interface SPI®/QSPI™/MICROWIRE™/DSP compatible
The AD7908 / AD7918 / AD7928 are, respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 8-channel, successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 8 MHz.
The conversion process and data acquisition are controlled using CS and the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is also initiated at this point. There are no pipeline delays associated with the part.
The AD7908 / AD7918 / AD7928 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7908 / AD7918 / AD7928 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.
Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFIN or 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7908 / AD7918 / AD7928 each feature eight single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequentially.
The conversion time for the AD7908 / AD7918 / AD7928 is determined by the SCLK frequency, which is also used as the master clock to control the conversion.
PRODUCT HIGHTLIGHTS
- High Throughput with Low Power Consumption. The AD7908 / AD7918 / AD7928 offer up to 1 MSPS throughput rates. At the maximum throughput rate with 3 V supplies, the AD7908 / AD7918 / AD7928 dissipate just 6 mW of power maximum.
- Eight Single-Ended Inputs with a Channel Sequencer. A sequence of channels can be selected, through which the ADC cycles and converts on.
- Single-Supply Operation with VDRIVE Function. The AD7908 / AD7918 / AD7928 operate from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial interface to connect directly to either 3 V or 5 V processor systems independent of AVDD.
- 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. The parts also feature various shutdown modes to maximize power efficiency at lower throughput rates. Current consumption is 0.5 μA max when in full shutdown.
- 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.
Documentation
Data Sheet 1
Technical Articles 1
Product Highlight 1
Evaluation Design File 2
Product Highlight 1
Device Drivers 1
Analog Dialogue 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 |
|---|---|---|---|
| AD7908BRUZ | 20-Lead TSSOP | ||
| AD7908BRUZ-REEL | 20-Lead TSSOP | ||
| AD7908BRUZ-REEL7 | 20-Lead TSSOP | ||
| AD7908WYRUZ-REEL7 | 20-Lead TSSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor |
||
| AD7908BRUZ | PRODUCTION | |
| AD7908BRUZ-REEL | PRODUCTION | |
| AD7908BRUZ-REEL7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| AD7908BRUZ | PRODUCTION | |
| AD7908BRUZ-REEL | PRODUCTION | |
| AD7908BRUZ-REEL7 | PRODUCTION | |
|
Jan 16, 2012 - 11_0244 Halogen Free Material Change for Select TSSOP Products Assembled at Amkor |
||
| AD7908WYRUZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| High Speed Op Amps (Bandwidth ≥ 50MHz) 1 | ||
| ADA4857-1 | PRODUCTION | Ultralow Distortion, Low Power, Low Noise, High Speed Op Amp |
| Low Power Op Amps (≤ 1mA/amp) 1 | ||
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 3 | ||
| AD8599 | PRODUCTION | Ultralow Distortion, Ultralow Noise Op Amp (Dual) |
| ADA4841-1 | PRODUCTION | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| AD8605 | PRODUCTION | Precision, Low Noise, CMOS, RRIO Op Amp (single) |
| Series Voltage References 5 | ||
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| REF192 | PRODUCTION | 2.5V Precision Micropower, Low Dropout, Low Voltage Reference |
| ADR441 | PRODUCTION | Ultralow Noise, LDO XFET® 2.5V Voltage Reference w/Current Sink and Source |
| AD1582 | PRODUCTION | 2.5V Micropower, Precisions Series Mode Voltage References |
| ADR391 | PRODUCTION | 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
| Shunt Voltage References 1 | ||
| AD780 | PRODUCTION | 2.5 V/3.0 V High Precision Reference |