AD977BRZ Datasheet, PDF (1/24 Pages) Analog Devices – 16-Bit, 100 kSPS/200 kSPS BiCMOS A/D Converter

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FEATURES
Fast 16-Bit ADC
100 kSPS Throughput Rate—AD977
200 kSPS Throughput Rate—AD977A
Single 5 V Supply Operation
Power Dissipation 100 mW Max
Power-Down Mode 50 ␮W
Input Ranges:
Unipolar; 0 V–10 V, 0 V–5 V and 0 V–4 V
Bipolar; ؎10 V, ؎5 V and ؎3.3 V
Choice of External or Internal 2.5 V Reference
High Speed Serial Interface
On-Chip Clock
20-Lead Skinny DIP or SOIC Package
28-Lead Skinny SSOP Package
16-Bit, 100 kSPS/200 kSPS
BiCMOS A/D Converter
AD977/AD977A
FUNCTIONAL BLOCK DIAGRAM
REF
V_{ANA AGND1}
CAP
4R
R1_IN
2R
R2_IN
R
R3_IN
4k⍀
2.5V
REFERENCE
AD977/
AD977A
SERIAL
4R
SWITCHED
DATA
CAP ADC
INTERFACE
AGND2
V_DIG
R = 5k⍀ AD977
R = 2.5k⍀ AD977A
CONTROL LOGIC &
INTERNAL CALIBRATION CIRCUITRY
CLOCK
SYNC
BUSY
DATACLK
DATA
DGND PWRD R/C CS TAG SB/BTC EXT/INT
GENERAL DESCRIPTION
The AD977/AD977A is a high speed, low power 16-bit A/D
converter that operates from a single 5 V supply. The AD977A
has a throughput rate of 200 kSPS whereas the AD977 has a
throughput rate of 100 kSPS. Each part contains a successive
approximation, switched capacitor ADC, an internal 2.5 V
reference, and a high speed serial interface. The ADC is factory
calibrated to minimize all linearity errors. The AD977/AD977A is
specified for full scale bipolar input ranges of ± 10 V, ± 5 V and
±3.3 V, and unipolar ranges of 0 V to 10 V, 0 V to 5 V and
0 V to 4 V.
The AD977/AD977A is comprehensively tested for ac param-
eters such as SNR and THD, as well as the more traditional dc
parameters of offset, gain and linearity.
PRODUCT HIGHLIGHTS
1. Fast Throughput
The AD977/AD977A is a high speed, 16-bit ADC based on
a factory calibrated switched capacitor architecture.
2. Single-Supply Operation
The AD977/AD977A operates from a single 5 V supply and
dissipates only 100 mW max.
3. Comprehensive DC and AC Specifications
In addition to the traditional specifications of offset, gain
and linearity, the AD977/AD977A is fully tested for SNR
and THD.
REV. D
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use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
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© Analog Devices, Inc., 2000