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What is SPT574?

This electronic component, produced by the manufacturer "SPT", performs the same function as "COMPLETE 12-BIT uP COMPATIBLE A/D CONVERTER".


SPT574 Datasheet PDF - SPT

Part Number SPT574
Description COMPLETE 12-BIT uP COMPATIBLE A/D CONVERTER
Manufacturers SPT 
Logo SPT Logo 


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FEATURES
• Improved Version of the HADC574Z
• Complete 12-Bit A/D Converter with Sample/Hold,
Reference and Clock
• Low Power Dissipation (100 mW Max)
• 12-Bit Linearity (Over Temp)
• 25 µs Max Conversion Time
• Single +5 V Supply
• Full Bipolar and Unipolar Input Range
SPT574
FAST, COMPLETE 12-BIT µP COMPATIBLE
A/D CONVERTER WITH SAMPLE/HOLD
APPLICATIONS
• Data Acquisition Systems
• 8 or 12-Bit µP Input Functions
• Process Control Systems
• Test and Scientific Instruments
• Personal Computer Interface
GENERAL DESCRIPTION
The SPT574 is a complete, 12-bit successive approximation
A/D converter manufactured in CMOS technology. The de-
vice is an improved version of the HADC574Z. Included on
chip are an internal reference, clock, and a sample-and-hold.
The S/H is an additional feature not available on similar
devices.
The SPT574 features 25 µs (max) conversion time of 10 or
20 V input signals. Also, a three-state output buffer is added
for direct interface to an 8, 12, or 16-bit µP bus.
The SPT574 has standard bipolar and unipolar input ranges
of 10 V and 20 V that are controlled by a bipolar offset pin and
laser trimmed for specified linearity, gain and offset accuracy.
The power supply is +5 V. The device also has an optional
mode control voltage which may be used depending on the
application. With a maximum dissipation of 100 mW at the
specified voltages, power consumption is about five times
lower than that of currently available devices.
The SPT574 is available in 28-lead ceramic sidebrazed DIP,
PDIP and SOIC packages in the commercial temperature
range.
BLOCK DIAGRAM
Output
Nibble A
Nibble B
Three-State Buffers And Control
Nibble C
STS
12-Bit SAR
Clock
+
Comp
-
Control Logic
Ref
12/8 CS Ao R/C CE
Ref Out
12-Bit
Capacitance
DAC
Offset/Gain
Trim
20 V In
10 V In
BIP Off
AGND
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300 FAX: (719) 528-2370 Website: http://www.spt.com E-Mail: [email protected]

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SPT574 equivalent
ELECTRICAL SPECIFICATIONS
TA = TMIN to TMAX, VEE = 0 to +5 V, VDD = +5 V, fS = 40 kHz, fIN = 10 kHz, unless otherwise specified.
PARAMETER
TEST
CONDITIONS
TEST
LEVEL
SPT574C
MIN TYP MAX
AC ELECTRICAL CHARACTERISTICS4
Stand-Alone Mode Timing
tHRL Low R/C Pulse Width
tDS STS Delay from R/C
tHDR Data Valid After R/C Low
tHS STS Delay After Data Valid
tHRH High R/C Pulse Width
tDDR Data Access Time
Sample-and-Hold
Aperture Delay
Aperture Uncertainty Time
VEE = +5 V
VEE = +5 V
VI 25
VI 200
VI 25
VI 300 400 1000
VI 100
VI 150
IV 20
V 300
SPT574B
MIN TYP MAX UNITS
25 ns
200 ns
25 ns
300 400 1000 ns
100 ns
150 ns
20 ns
300 ps, RMS
TEST LEVEL CODES
TEST LEVEL
All electrical characteristics are subject to the
following conditions:
All parameters having min/max specifications
are guaranteed. The Test Level column indi-
cates the specific device testing actually per-
formed during production and Quality Assur-
ance inspection. Any blank section in the data
column indicates that the specification is not
tested at the specified condition.
I
II
III
IV
V
VI
TEST PROCEDURE
100% production tested at the specified temperature.
100% production tested at TA=25 °C, and sample
tested at the specified temperatures.
QA sample tested only at the specified temperatures.
Parameter is guaranteed (but not tested) by design
and characterization data.
Parameter is a typical value for information purposes
only.
100% production tested at TA = 25 °C. Parameter is
guaranteed over specified temperature range.
Figure 3 - Low Pulse for R/C - Outputs Enabled
After Conversion
t HRL
R/C
t DS
STS
t HDR
tC
t HS
DB11-DB0 DATA VALID
DATA VALID
Figure 4 - High Pulse for R/C - Outputs Enabled While
R/C is High, Otherwise High Impedance
R/C
t HRH
t DS
STS
t DDR
t HDR
HIGH-Z
DB11-DB0
DATA VALID
tC
HIGH-Z
SPT
5
SPT574
8/1/00


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SPT574 electronic component.


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Part NumberDescriptionMFRS
SPT574The function is COMPLETE 12-BIT uP COMPATIBLE A/D CONVERTER. SPTSPT

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