AD7675*

Features:

Throughput: 100 kSPS
INL: ±1.5 LSB Max (±0.0015% of Full-Scale)
16 Bits Resolution with No Missing Codes
S/(N+D): 94 dB Typ @ 45 kHz
THD: 110 dB Typ @ 45 kHz
Differential Input Range: ±2.5 V
Both AC and DC Specifications
No Pipeline Delay
Parallel (8/16 Bits) and Serial 5 V/3 V Interface
SPI™/QSPI™/MICROWIRE™/DSP Compatible
Single 5 V Supply Operation
15 mW Typical Power Dissipation, 15 W @ 100 SPS
Power-Down Mode: 7 W Max
Package: 48-Lead Quad Flat Pack (LQFP)
Pin-to-Pin Compatible with the AD7660
Replacement of AD676, AD677


Application

CT Scanners
Data Acquisition
Instrumentation
Spectrum Analysis
Medical Instruments
Battery-Powered Systems
Process Control


Pinout




Specifications

Analog Inputs
    IN+2, IN2, REF, REFGND . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .  . . . . . . . . . . AVDD + 0.3 V to AGND 0.3 V
Ground Voltage Differences
    AGND, DGND, OGND . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3 V
Supply Voltages
    AVDD, DVDD, OVDD . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . 7 V
    AVDD to DVDD, AVDD to OVDD . . . . . . . . . . . . . . .  . . . . . ±7 V
    DVDD to OVDD . . . . . . . . . . . . . . . . . . . . . . . .   . . . . . . . . ±7 V
Digital Inputs . . . . . . . . . . . . . .  . . . . . . . 0.3 V to DVDD + 0.3 V
Internal Power Dissipation3 . . . . .  . . . . . . . . . . . . . . . . . 700 mW
Junction Temperature . . . . . . . . . . . . . . . . . . . . .  . . . . . . . 150°C
Storage Temperature Range . . . . . . . .  . . . . . 65°C to +150°C
Lead Temperature Range
    (Soldering 10 sec) . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . 300°C



Description

The AD7675 is a 16-bit, 100 kSPS, charge redistribution SAR,fully differential analog-to-digital converter that operates from a single 5 V power supply. The part contains a high-speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.
The AD7675 is hardware factory calibrated and is comprehensively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity.
It is fabricated using Analog Devices' high-performance, 0.6 micron CMOS process and is available in a 48-lead LQFP with operation specified from 40°C to +85°C.