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Analog Devices Semiconductor Electronic Components Datasheet



AD1674

12-Bit 100 kSPS A/D Converter



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AD1674 pdf
a
FEATURES
Complete Monolithic 12-Bit 10 s Sampling ADC
On-Board Sample-and-Hold Amplifier
Industry Standard Pinout
8- and 16-Bit Microprocessor Interface
AC and DC Specified and Tested
Unipolar and Bipolar Inputs
؎5 V, ؎10 V, 0 V–10 V, 0 V–20 V Input Ranges
Commercial, Industrial and Military Temperature
Range Grades
MIL-STD-883 and SMD Compliant Versions Available
12-Bit 100 kSPS
A/D Converter
AD1674*
FUNCTIONAL BLOCK DIAGRAM
12/8
CS
A0
CE
R/C
REF OUT
10V
REF
CONTROL
CLOCK
SAR
12
AGND
20k
REF IN
BIP OFF
20VIN
10VIN
5k
2.5k
5k
COMP
12
10k
10k DAC
IDAC
5k
2.5k
SHA
AD1674
STS
DB11 (MSB)
12 DB0 (LSB)
PRODUCT DESCRIPTION
The AD1674 is a complete, multipurpose, 12-bit analog-to-
digital converter, consisting of a user-transparent onboard
sample-and-hold amplifier (SHA), 10 volt reference, clock and
three-state output buffers for microprocessor interface.
The AD1674 is pin compatible with the industry standard
AD574A and AD674A, but includes a sampling function while
delivering a faster conversion rate. The on-chip SHA has a wide
input bandwidth supporting 12-bit accuracy over the full
Nyquist bandwidth of the converter.
The AD1674 is fully specified for ac parameters (such as S/(N+D)
ratio, THD, and IMD) and dc parameters (offset, full-scale
error, etc.). With both ac and dc specifications, the AD1674 is
ideal for use in signal processing and traditional dc measure-
ment applications.
The AD1674 design is implemented using Analog Devices’
BiMOS II process allowing high performance bipolar analog cir-
cuitry to be combined on the same die with digital CMOS logic.
Five different temperature grades are available. The AD1674J
and K grades are specified for operation over the 0°C to +70°C
temperature range. The A and B grades are specified from
–40°C to +85°C; the AD1674T grade is specified from –55°C
to +125°C. The J and K grades are available in both 28-lead
plastic DIP and SOIC. The A and B grade devices are available
in 28-lead hermetically sealed ceramic DIP and 28-lead SOIC.
The T grade is available in 28-lead hermetically sealed ceramic
DIP.
*Protected by U. S. Patent Nos. 4,962,325; 4,250,445; 4,808,908; RE30586 .
PRODUCT HIGHLIGHTS
1. Industry Standard Pinout: The AD1674 utilizes the pinout
established by the industry standard AD574A and AD674A.
2. Integrated SHA: The AD1674 has an integrated SHA which
supports the full Nyquist bandwidth of the converter. The
SHA function is transparent to the user; no wait-states are
needed for SHA acquisition.
3. DC and AC Specified: In addition to traditional dc specifica-
tions, the AD1674 is also fully specified for frequency do-
main ac parameters such as total harmonic distortion,
signal-to-noise ratio and input bandwidth. These parameters
can be tested and guaranteed as a result of the onboard
SHA.
4. Analog Operation: The precision, laser-trimmed scaling and
bipolar offset resistors provide four calibrated ranges:
0 V to +10 V and 0 V to +20 V unipolar, –5 V to +5 V and
–10 V to +10 V bipolar. The AD1674 operates on +5 V and
± 12 V or ± 15 V power supplies.
5. Flexible Digital Interface: On-chip multiple-mode
three-state output buffers and interface logic allow direct
connection to most microprocessors.
REV. C
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703



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AD1674 pdf
AD1674–SPECIFICATIONS
DC SPECIFICATIONS (TMIN to TMAX, VCC = +15 V ؎ 10% or +12 V ؎ 5%, VLOGIC = +5 V ؎ 10%, VEE = –15 V ؎ 10% or
–12 V ؎ 5% unless otherwise noted)
Parameter
AD1674J
AD1674K
Min Typ Max Min Typ Max
RESOLUTION
12 12
INTEGRAL NONLINEARITY (INL)
± 1 ± 1/2
Unit
Bits
LSB
DIFFERENTIAL NONLINEARITY (DNL)
(No Missing Codes)
UNIPOLAR OFFSET1 @ +25°C
BIPOLAR OFFSET1 @ +25°C
FULL-SCALE ERROR1, 2 @ +25°C
(with Fixed 50 Resistor from REF OUT to REF IN)
TEMPERATURE RANGE
TEMPERATURE DRIFT3
Unipolar Offset2
Bipolar Offset2
Full-Scale Error2
POWER SUPPLY REJECTION
VCC = 15 V ± 1.5 V or 12 V ± 0.6 V
VLOGIC = 5 V ± 0.5 V
VEE = –15 V ± 1.5 V or –12 V ± 0.6 V
ANALOG INPUT
Input Ranges
Bipolar
Unipolar
Input Impedance
10 Volt Span
20 Volt Span
POWER SUPPLIES
Operating Voltages
VLOGIC
VCC
VEE
Operating Current
ILOGIC
ICC
IEE
POWER DISSIPATION
INTERNAL REFERENCE VOLTAGE
Output Current (Available for External Loads)4
(External Load Should Not Change During Conversion
NOTES
1Adjustable to zero.
2Includes internal voltage reference error.
3Maximum change from 25°C value to the value at TMIN or TMAX.
4Reference should be buffered for ± 12 V operation.
All min and max specifications are guaranteed.
Specifications subject to change without notice.
12 12
±3 ±2
±6 ±4
0.1 0.25
0.1 0.25
0 +70 0 +70
±2 ±1
±2 ±1
±6 ±3
±2 ±1
± 1/2 ± 1/2
±2 ±1
Bits
LSB
LSB
% of FSR
°C
LSB
LSB
LSB
LSB
LSB
LSB
–5
–10
0
0
35
6 10
+5 –5
+10 –10
+10 0
+20 0
73
14 6
5
10
+5
+10
+10
+20
7
14
Volts
Volts
Volts
Volts
k
k
+4.5
+11.4
–16.5
5
10
14
385
9.9 10.0
+5.5
+16.5
–11.4
+4.5
+11.4
–16.5
8
14
18
575
10.1 9.9
2.0
5
10
14
385
10.0
+5.5
+16.5
–11.4
8
14
18
575
10.1
2.0
Volts
Volts
Volts
mA
mA
mA
mW
Volts
mA
–2– REV. C



Part Number AD1674
Description 12-Bit 100 kSPS A/D Converter
Maker Analog Devices - Analog Devices
Total Page 12 Pages
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