12 bit ADC meets need for higher speed and increased channels

24 October 2001 Analogue, Mixed Signal, LSI

Meeting the demand for increased channel count on ADCs for optical, wired and wireless communications and all forms of data acquisition, Analog Devices' AD7490 is a 12 bit, 1 Msps, 16-channel successive-approximation (SAR) analog-to-digital converter (ADC). This converter is appropriate for multichannel applications such as optical networking where multiple temperatures are monitored for laser frequency control and power is measured to determine gain. Also featured is a sequencer which is controlled by a shadow register that allows continuous or single conversions on selected channels. The channel selection function can be altered while the sequence is in progress.

The AD7490 uses advanced design techniques to achieve very low-power dissipation at high throughput rates. Three power management modes further maximise performance efficiency at lower throughput rates: full powerdown, auto shutdown and auto standby. Full power dissipation is just 3,6 mW and in the shutdown mode, power consumption is only 1 µA.

This ADC operates from a single 2,7 to 5,25 V supply and contains a Vdrive (interface drive voltage) function to allow the serial interface to connect directly to either 3 or 5 V processor systems independent of V_dd (power supply voltage). Additionally, the converter contains a low-noise, wide bandwidth track/hold amplifier which can handle input frequencies in excess of 1 MHz.

The AD7490 is offered in a 32-pin lead frame chip scale package (LFCSP).

Analog Data Products SA

(011) 531 1400

Further reading:

A new era in modular I/O solutions
Rugged Interconnect Technologies Analogue, Mixed Signal, LSI
Aerospace and defence system designers are demanding scalable and high-performance I/O solutions and while traditional mezzanine standards have proven reliable, they often fall short of meeting modern bandwidth, size, and flexibility requirements.

Read more...

---

High voltage instrument op-amp
iCorp Technologies Analogue, Mixed Signal, LSI
The SGM621B is a high accuracy, high voltage instrumentation amplifier, which is designed to set any gain from 1 to 10 000 with one external resistor.

Read more...

---

High-speed SAR ADC simplifies design
Altron Arrow Analogue, Mixed Signal, LSI
The ADI AD4080 simplifies data converter integration by integrating a low drift reference buffer, low dropout regulators and a 16K result data FIFO buffer.

Read more...

---

2-wire quad voltage output DAC
Altron Arrow Analogue, Mixed Signal, LSI
The DAC has a 2-wire serial interface that operates at clock rates up to 400 kHz, and this interface is SMBus compatible, allowing multiple devices to be placed on the same bus.

Read more...

---

Dual-channel ADC for RF applications
RFiber Solutions Analogue, Mixed Signal, LSI
The ARF0471 from Advanced RF is a dual-channel, 14-bit, 3 GSPS ADC, which features an on-chip buffer and sample-and-hold circuit.

Read more...

---

Infineon launches Edge Ai software solution
Altron Arrow Analogue, Mixed Signal, LSI
Infineon has introduced DEEPCRAFT, a new software solution category brand for Edge AI and machine learning, after the company recognised the huge potential of Edge AI for the market.

Read more...

---

16-bit voltage output denseDAC
Altron Arrow Analogue, Mixed Signal, LSI
The AD5766 uses a versatile four-wire serial interface that operates at clock rates of up to 50 MHz for write mode, and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.

Read more...

---

AFE enables the software-defined factory
Avnet Silica Analogue, Mixed Signal, LSI
With its software configurable analogue inputs, where each input can be configured for voltage, current, resistance, or temperature, NXP’s N-AFE enables a new level of flexibility.

Read more...

---

Precision voltage reference
Altron Arrow Analogue, Mixed Signal, LSI
The ADR1001 is a fully integrated, ultra-low drift, buried Zener precision voltage reference solution in a single chip.

Read more...

---

Microphones enable low-power always-on state
Avnet Abacus Analogue, Mixed Signal, LSI
TDK Corporation has announced its InvenSense SmartSound T5848 I2S microphones to enable intelligent keyword, voice command, and sound detection at ultra-low power.

Read more...

---