ADC4320 Analogic Corporation, ADC4320 Datasheet
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ADC4320
Manufacturer Part Number
ADC4320
Description
Manufacturer
Analogic Corporation
Datasheet
1.ADC4320.pdf
(8 pages)
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Introduction
The ADC4320, ADC4322, and ADC4325 are complete 16-bit, 1 MHz, 2
MHz, and 500 kHz A/D converter subsystems with a built-in sample-and-
hold amplifier in a space-saving 46-pin hybrid package. They offer pin-
programmable input voltage ranges of ±2.5V, ±5V, ±10V and 0 to +10V,
and have been designed for use in applications, such as ATE, digital os-
cilloscopes, medical imaging, radar, sonar, and analytical instrumenta-
tion, requiring high speed and high resolution front ends. The ADC4322
is capable of digitizing a 1 MHz signal at a 2 MHz sampling rate with a
guarantee of no missing codes from 0°C to +70°C, or in an extended
temperature range version, from –25°C to +85°C. Equally impressive in
frequency domain applications, the ADC4325 features 91 dB minimum
signal-to-noise ratio with input signals from DC to 100 kHz.
The ADC432X Series utilizes the latest semiconductor technologies to
produce a cost-effective, high performance part in a 46-pin hybrid pack-
age. They are designed around a two-pass, sub-ranging architecture that
integrates a low distortion sample-and-hold amplifier, precision voltage
reference, ultra-stable 16-bit linear reference D/A converter, all necessary
timing circuitry, and tri-state CMOS/TTL compatible output lines for ease
of system integration.
Superior performance and ease-of-use make the ADC432X Series the
ideal solution for those applications requiring a sample-and-hold amplifier
directly at the input to the A/D converter. Having the S/H amplifier inte-
grated with the A/D converter benefits the system designer in two ways.
First, the S/H has been designed specifically to complement the perfor-
mance of the A/D converter; for example, the acquisition time, hold mode
settling and droop rate have been optimized for the A/D converter, result-
ing in exceptional overall performance. Second, the designer achieves
Figure 1. Functional Block Diagram.
S/H IN 3
S/H IN 1
S/H IN 2
DNC
EXT OFF ADJ
Ext Gain Adj
+REF OUT
–REF OUT
+
+
+
+
+
S/H
+
–1
–
Residue Amp
–6.4
16-Bit Linear
9-Bit DAC
Reference
–4
S/H Control
–0.2
9-Bit Data
MUX Amp
+1
Sampling A/D Converters
in a Space-Saving 46-Pin Hybrid Package
Flash ADC
10-Bit
Pass1/Pass2
ADC Clk
Very High Speed 16-Bit,
Continued on page 5.
9-Bit
Data
Array
Gate
Timing
Circuit
Lo Byte EN
O/U Flow
Hi Byte EN
Transfer
B1
B1-B16
Trigger
Features
Applications
ADC4320/ADC4322/
2 MHz, 1 MHz, and 500 kHz
Conversion Rates
16-Bit Resolution
0.003% Maximum Integral
Nonlinearity
No Missing Codes
Peak Distortion: –92 dB Max.
(100 kHz Input)
Signal to Noise Ratio:
Total Harmonic Distortion:
TTL/CMOS Compatibility
Low Noise
Electromagnetic/Electrostatic
Shielding
Digital Signal Processing
Sampling Oscilloscopes
Automatic Test Equipment
High-Resolution Imaging
Analytical Instrumentation
Medical Instrumentation
CCD Detectors
IR Imaging
Sonar/Radar
86 dB (ADC4322) Min.
89 dB (ADC4320) Min.
91 dB (ADC4325) Min.
(100 kHz Input)
–86 dB (ADC4320) Max.
–90 dB (ADC4325) Max.
ADC4325