EVAL-SDP-CB1Z(RevE) 데이터 시트보기 (PDF) - Analog Devices

부품명

상세내역

일치하는 목록

EVAL-SDP-CB1Z
(Rev.:RevE)

16-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP

Analog Devices 

Data Sheet

16-Bit, 1.5 LSB INL, 250 kSPS PulSAR

Differential ADC in MSOP

AD7687

FEATURES

16-bit resolution with no missing codes

Throughput: 250 kSPS

INL: ±0.4 LSB typ, ±1.5 LSB max (±23 ppm of FSR)

Dynamic range: 96.5 dB

SNR: 95.5 dB at 20 kHz

THD: −118 dB at 20 kHz

True differential analog input range

±VREF

0 V to VREF with VREF up to VDD on both inputs

No pipeline delay

Single-supply 2.3 V to 5.5 V operation with

1.8 V/2.5 V/3 V/5 V logic interface

Proprietary serial interface: SPI/QSPI™/MICROWIRE/DSP

compatible

Daisy-chain multiple ADCs and BUSY indicator

Power dissipation

1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS, and

1.4 μW at 2.5 V/100 SPS

Standby current: 1 nA

10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP

Pin-for-pin compatible with AD7685, AD7686, and AD7688

APPLICATIONS

Battery-powered equipment

Data acquisitions

Instrumentation

Medical instruments

Process controls

GENERAL DESCRIPTION

The AD76871 is a 16-bit, charge redistribution, successive

approximation, analog-to-digital converter (ADC) that operates

from a single power supply, VDD, between 2.3 V to 5.5 V. It

contains a low power, high speed, 16-bit sampling ADC with no

missing codes, an internal conversion clock, and a versatile

serial interface port. The device also contains a low noise, wide

bandwidth, short aperture delay track-and-hold circuit. On the

CNV rising edge, the AD7687 the samples the voltage difference

between IN+ and IN− pins, which can range from −VREF to +VREF.

The reference voltage, VREF, is applied externally and can be set

up to the supply voltage.

The power consumption of the device scales linearly with

throughput.

TYPICAL APPLICATION CIRCUIT

0.5V TO 5V 2.5 TO 5V

VREF

0

VREF

0

REF VDD VIO

SDI

IN+

AD7687 SCK

IN–

SDO

GND

CNV

1.8V TO VDD

3- OR 4-WIRE INTERFACE

(SPI, DAISY CHAIN, CS)

Figure 1.

The SPI-compatible serial interface also features the ability to

daisy-chain several ADCs on a single 3-wire bus and provides

an optional BUSY indicator by means of the SDI pin. It is

compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate

supply VIO.

The AD7687 comes in a 10-lead MSOP or a 10-lead LFCSP

with operation specified from −40°C to +85°C.

Table 1. MSOP, LFCSP/SOT-23 16-Bit PulSAR® ADC

Type

100 kSPS 250 kSPS 500 kSPS

True Differential

AD7684 AD7687 AD7688

Pseudo

AD7683 AD7685 AD7686

Differential/Unipolar

AD7694

Unipolar

AD7680

1 Protected by U.S. Patent 6,703,961.

Rev. E

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 ©2005–2015 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

Share Link: