AD7665*

Features:

Throughput:
  570 kSPS (Warp Mode)
  500 kSPS (Normal Mode)
INL: ±2.5 LSB Max (±0.0038% of Full Scale)
16-Bit Resolution with No Missing Codes
S/(N+D): 90 dB Typ @ 180 kHz
THD: 100 dB Typ @ 180 kHz
Analog Input Voltage Ranges:
  Bipolar: ±10 V, ±5 V, ±2.5 V
  Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V
Both AC and DC Specifications
No Pipeline Delay
Parallel (8/16 Bits) and Serial 5 V/3 V Interface
Single 5 V Supply Operation
Power Dissipation
  64 mW Typical
  15 W @ 100 SPS
Power-Down Mode: 7 W Max
Package: 48-Lead Quad Flatpack (LQFP)
Pin-to-Pin Compatible Upgrade of the AD7664/AD7663 


Application

Data Acquisition
Communication
Instrumentation
Spectrum Analysis
Medical Instruments
Process Control


Pinout




Specifications

Analog Inputs
  IND², INC², INB² . . . . . . . . . .. . . . . . . . . . 11 V to +30 V
  INA, REF, INGND, REFGND
  . . . . . . . . . . . . . . . . . . .. .. . AGND 0.3 V to AVDD + 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 AD7665 is a 16-bit, 570 kSPS, charge redistribution SAR,analog-to-digital converter that operates from a single 5 V power supply. It contains a high-speed 16-bit sampling ADC, a resistor input scaler which allows various input ranges, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.

The AD7665 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.

AD7665 features a very high sampling rate mode (Warp) and, for asynchronous conversion rate applications, a fast mode (Normal)and, for low power applications, a reduced power mode(Impulse) where the power is scaled with the throughput.

AD7665 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.