AD7998
PRODUCTION8-Channel, 12-Bit ADC with I2C Compatible Interface in 20-Lead TSSOP
- Part Models
- 4
- 1ku List Price
- Starting From $5.76
Part Details
- 12-Bit ADC with Fast Conversion Time: 2 µs
- Eight Single-Ended Analog Input Channels
- Specified for VDD of 2.7 V to 5.5 V
- Low Power Consumption
- Fast Throughput Rate: - 188 kSPS
- Sequencer Operation
- Automatic Cycle Mode
- I2C® Compatible Serial Interface
- I2C® Interface supports:
Standard, Fast, and High-Speed Modes - Out of Range Indicator
- Pin-Selectable Addressing via AS
- Automatic Shutdown Mode: - 1 µA max
The AD7997 / AD7998 are 8-channel, 10- and 12-bit, low power, successive approximation ADCs with an I2C-compatible interface. The parts operate from a single 2.7 V to 5.5 V power supply and feature a 2 µs conversion time. The parts contain an 8-channel multiplexer and track-and-hold amplifier that can handle input frequencies up to 11 MHz.
The AD7997 / AD7998 provide a 2-wire serial interface that is compatible with I2C interfaces. Each part comes in two versions, AD7997-0 / AD7998-0 and AD7997-1 / AD7998-1, and each version allows at least two different I2C addresses. The I2C interface on the AD7997-0/AD7998-0 supports standard and fast I2C interface modes. The I2C interface on the AD7997-1 / AD7998-1 supports standard, fast, and high speed I2C interface modes.
The AD7997 / AD7998 normally remain in a shutdown state while not converting, and power up only for conversions. The conversion process can be controlled using the CONVST pin, by a command mode where conversions occur across I2C write operations or an automatic conversion interval mode selected through software control.
The AD7997 / AD7998 require an external reference that should be applied to the REFIN pin and can be in the range of 1.2 V to VDD. This allows the widest dynamic input range to the ADC.
On-chip limit registers can be programmed with high and low limits for the conversion result, and an open-drain, out-of-range indicator output (ALERT) becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt.
PRODUCT HIGHLIGHTS
- 2 µs conversion time with low power consumption.
- I2C-compatible serial interface with pin-selectable addresses. Two AD7997/AD7998 versions allow five AD7997/AD7998 devices to be connected to the same serial bus.
- The parts feature automatic shutdown while not converting to maximize power efficiency. Current consumption is 1 µA max when in shutdown mode at 3V.
- Reference can be driven up to the power supply.
- Out-of-range indicator that can be software disabled or enabled.
- One-shot and automatic conversion rates.
- Registers store minimum and maximum conversion results.
Documentation
Data Sheet 2
Application Note 2
Technical Articles 1
Product Highlight 1
Evaluation Design File 1
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 |
|---|---|---|---|
| AD7998BRUZ-0 | 20-Lead TSSOP | ||
| AD7998BRUZ-0REEL | 20-Lead TSSOP | ||
| AD7998BRUZ-1 | 20-Lead TSSOP | ||
| AD7998BRUZ-1REEL | 20-Lead TSSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
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Apr 5, 2021 - 21_0035 Amkor Philippines as an Alternate Site for TSSOP_4.4 |
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| AD7998BRUZ-0 | PRODUCTION | |
| AD7998BRUZ-0REEL | PRODUCTION | |
| AD7998BRUZ-1 | PRODUCTION | |
| AD7998BRUZ-1REEL | PRODUCTION | |
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Jul 23, 2014 - 13_0241 Qualification of ASE Chungli as an Alternate Assembly Site for Select 16L, 20L and 24L TSSOP Packages |
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| AD7998BRUZ-0 | PRODUCTION | |
| AD7998BRUZ-0REEL | PRODUCTION | |
| AD7998BRUZ-1 | PRODUCTION | |
| AD7998BRUZ-1REEL | PRODUCTION | |
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Jan 20, 2012 - 11_0218 Halogen Free Material Change for Certain TSSOP Products at Carsem |
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| AD7998BRUZ-0 | PRODUCTION | |
| AD7998BRUZ-0REEL | PRODUCTION | |
| AD7998BRUZ-1 | PRODUCTION | |
| AD7998BRUZ-1REEL | PRODUCTION | |
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Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
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| AD7998BRUZ-0 | PRODUCTION | |
| AD7998BRUZ-0REEL | PRODUCTION | |
| AD7998BRUZ-1 | PRODUCTION | |
| AD7998BRUZ-1REEL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 1
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| I²C Isolators 4 | ||
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| ADUM1251 | PRODUCTION | Hot Swappable, Dual I2C Isolators |
| ADuM2250 | PRODUCTION | Hot-Swappable Dual I2C® Isolators, 5 kV |
| ADuM2251 | PRODUCTION | Hot-Swappable Dual I2C® Isolators, 5 kV |
| Low Input Bias Current Op Amps (≤100 pA) 1 | ||
| AD8604 | PRODUCTION | DigiTrim™ RRIO Quad Op Amp with Very Low Offset Voltage |
| Low Power Op Amps (≤ 1mA/amp) 2 | ||
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| AD8032 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Dual Amplifier |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 2 | ||
| AD8605 | PRODUCTION | Precision, Low Noise, CMOS, RRIO Op Amp (single) |
| AD8599 | PRODUCTION | Ultralow Distortion, Ultralow Noise Op Amp (Dual) |
| Series Voltage References 7 | ||
| ADR03 | PRODUCTION | Ultracompact, Precision 2.5 V Voltage Reference |
| AD1582 | PRODUCTION | 2.5V Micropower, Precisions Series Mode Voltage References |
| ADR381 | PRODUCTION | 2.048 V and 2.5 V Bandgap Voltage References |
| ADR391 | PRODUCTION | 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| REF191 | PRODUCTION | 2.048V, Precision Micropower, Low Dropout, Low Voltage Reference |
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| Shunt Voltage References 1 | ||
| AD780 | PRODUCTION | 2.5 V/3.0 V High Precision Reference |
Evaluation Kits
AD7998 Evaluation Board