Overview
The AD7888BR, produced by Analog Devices Inc., is a high-speed, low-power, 12-bit analog-to-digital converter (ADC). It operates from a single power supply ranging from 2.7 V to 5.25 V and is capable of a throughput rate of 125 kSPS with a 2 MHz clock. This ADC features eight single-ended analog inputs and an on-chip 2.5 V reference, which can be used as the reference source or overridden with an external reference voltage between 1.2 V and VDD. The AD7888BR is designed for low power consumption, with typical power dissipation of 2 mW in normal operation and 3 µW in power-down mode. It is available in 16-lead narrow body SOIC and TSSOP packages, offering significant space-saving advantages.
Key Specifications
| Parameter | Value | Unit | Comment |
|---|---|---|---|
| Resolution | 12-bit | ||
| Number of Channels | 8 | Single-ended inputs | |
| Supply Voltage | 2.7 V to 5.25 V | V | Single supply |
| Throughput Rate | 125 kSPS | samples per second | With 2 MHz clock |
| Conversion Time | 7.25 µs | µs | With 2 MHz clock |
| Track/Hold Acquisition Time | 500 ns | ns | |
| Input Range | 0 V to VREF | V | VREF can be between 1.2 V and VDD |
| Reference Type | Internal/External | On-chip 2.5 V reference or external reference | |
| Interface | SPI, QSPI, MICROWIRE, DSP | Serial interface | |
| Power Dissipation | 2 mW (typ), 3 µW (power-down) | mW/µW | Typical values |
| Operating Temperature | -40°C to 105°C | °C | |
| Package Type | 16-lead SOIC, TSSOP |
Key Features
- High-speed, low-power 12-bit ADC with a throughput rate of 125 kSPS.
- Eight single-ended analog inputs with an input range from 0 V to VREF.
- On-chip 2.5 V reference or external reference capability.
- Flexible power management options including automatic power-down after conversion.
- CMOS construction for low power dissipation.
- Serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Available in 16-lead narrow body SOIC and TSSOP packages.
- Low power consumption: 2 mW typical in normal operation and 3 µW in power-down mode.
Applications
- Battery-powered systems (personal digital assistants, medical instruments, mobile communications).
- Instrumentation and control systems.
- High-speed modems.
- Handheld terminal interfaces.
- Medical instrumentation and medical imaging.
- In-building wireless telephony.
- Communications.
- Microcontrollers.
- High-speed data acquisition for PCs.
- Automotive systems.
- Telecommunications.
- 3-phase power control.
Q & A
- What is the resolution of the AD7888BR ADC?
The AD7888BR has a resolution of 12 bits.
- How many analog input channels does the AD7888BR have?
The AD7888BR has eight single-ended analog input channels.
- What is the supply voltage range for the AD7888BR?
The supply voltage range is from 2.7 V to 5.25 V.
- What is the maximum throughput rate of the AD7888BR?
The maximum throughput rate is 125 kSPS with a 2 MHz clock.
- How long does the track/hold acquisition time take?
The track/hold acquisition time is 500 ns.
- What types of packages are available for the AD7888BR?
The AD7888BR is available in 16-lead SOIC and TSSOP packages.
- What is the typical power dissipation of the AD7888BR in normal operation?
The typical power dissipation is 2 mW in normal operation and 3 µW in power-down mode.
- What is the operating temperature range for the AD7888BR?
The operating temperature range is from -40°C to 105°C.
- Can the AD7888BR use an external reference voltage?
Yes, the AD7888BR can use an external reference voltage between 1.2 V and VDD.
- What types of serial interfaces are supported by the AD7888BR?
The AD7888BR supports SPI, QSPI, MICROWIRE, and DSP serial interfaces.
