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ICL7109IDL Datasheet

  • ICL7109IDL

  • 12-Bit, Microprocessor- Compatible A/D Converter

  • 25頁

  • INTERSIL   INTERSIL

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November 2000
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ICL7109
12-Bit, Microprocessor-
Compatible A/D Converter
Features
鈥?12-Bit Binary (Plus Polarity and Over-Range) Dual
Slope Integrating Analog-to-Digital Converter
鈥?Byte-Organized, TTL Compatible Three-State Outputs
and UART Handshake Mode for Simple Parallel or
Serial Interfacing to Microprocessor Systems
鈥?RUN/HOLD Input and STATUS Output Can Be Used to
Monitor and Control Conversion Timing
鈥?True Differential Input and Differential Reference
鈥?Low Noise (Typ) . . . . . . . . . . . . . . . . . . . . . . . . 15碌V
P-P
鈥?Input Current (Typ) . . . . . . . . . . . . . . . . . . . . . . . . . .1pA
鈥?Operates At Up to 30 Conversions/s
鈥?On-Chip Oscillator Operates with Inexpensive 3.58MHz
TV Crystal Giving 7.5 Conversions/s for 60Hz Rejec-
tion. May Also Be Used with An RC Network Oscillator
for Other Clock Frequencies
Description
The ICL7109 is a high performance, CMOS, low power
integrating A/D converter designed to easily interface with
microprocessors.
The output data (12 bits, polarity and over-range) may be
directly accessed under control of two byte enable inputs and a
chip select input for a single parallel bus interface. A UART
handshake mode is provided to allow the ICL7109 to work with
industry-standard UARTs in providing serial data transmission.
The RUN/HOLD input and STATUS output allow monitoring
and control of conversion timing.
The ICL7109 provides the user with the high accuracy, low
noise, low drift versatility and economy of the dual-slope
integrating A/D converter. Features like true differential input
and reference, drift of less than 1碌V/
o
C, maximum input bias
current of 10pA, and typical power consumption of 20mW
make the ICL7109 an attractive per-channel alternative to
analog multiplexing for many data acquisition applications.
Part Number Information
PART NUMBER
ICL7109MDL
ICL7109IDL
ICL7109IJL
ICL7109CPL
ICL7109MDL/883B
ICL7109IPL
TEMP.
RANGE (
o
C)
-55 to 125
-25 to 85
-25 to 85
0 to 70
-55 to 125
-25 to 85
PACKAGE
40 Ld SBDIP
40 Ld SBDIP
40 Ld CERDIP
40 Ld PDIP
40 Ld SBDIP
40 Ld PDIP
PKG.
NO.
D40.6
D40.6
F40.6
E40.6
D40.6
E40.6
Pinout
ICL7109
(CERDIP, PDIP, SBDIP)
TOP VIEW
GND
1
40 V+
39 REF IN -
38 REF CAP-
37 REF CAP+
36 REF IN+
35 IN HI
34 IN LO
33 COMMON
32 INT
31 AZ
30 BUF
29 REF OUT
28 V-
27 SEND
26 RUN/HOLD
25 BUF OSC OUT
24 OSC SEL
23 OSC OUT
22 OSC IN
21 MODE
STATUS 2
POL
OR
B12
B11
B10
B9
B8
3
4
5
6
7
8
9
B7 10
B6 11
B5 12
B4 13
B3 14
B2 15
B1 16
TEST 17
LBEN 18
HBEN 19
CE/LOAD 20
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
File Number
3092.2
1

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