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參數資料
| 型號： | TC7109IJL |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
| 中文描述： | 12位向上兼容的模擬數字轉換器 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 274K |
| 代理商： | TC7109IJL |
3-91
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
FEATURES
I
Zero-Integrator Cycle for Fast Recovery From
Input Overloads
I
Eliminates Cross -Talk in Multiplexed Systems
I
12-Bit Plus Sign Integrating A/D Converter With
Overrange Indication
I
Sign Magnitude Coding Format
I
True Differential Signal Input and Differential
Reference Input
I
Low Noise............................................ 15
μ
V
P-P
Typ
I
Input Current ..............................................1 pA Typ
I
No Zero Adjustment Needed
I
TTL-Compatible, Byte-Organized Tri-State
Outputs
I
UART Handshake Mode for Simple Serial Data
Transmission
ORDERING INFORMATION
PART CODE
A or blank*
TC7109X
Package
Code
Temperature
Range
Package
CKW
CLW
CPL
IJL
* The "A" version has a higher I
OUT
on the digital lines.
44-Pin PQFP
44-Pin PLCC
40-Pin Plastic DIP
40-Pin CerDIP
0
°
C to +70
°
C
0
°
C to +70
°
C
0
°
C to +70
°
C
–25
°
C to +85
°
C
TC7109
TC7109A
12-BIT
μ
P-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS
GENERAL DESCRIPTION
The TC7109A is a 12-bit plus sign, CMOS low-power
analog-to-digital converter (ADC). Only eight passive com-
ponents and a crystal are required to form a complete
dual-slope integrating ADC.
The improved V
OH
source current TC7109A has fea-
tures that make it an attractive per-channel alternative to
analog multiplexing for many data acquisition applica-
tions. These features include typical input bias current of
1pA drift of less than 1
μ
V/
°
C, input noise typically 15
μ
V
P-P
,
and auto-zero. True differential input and reference allow
measurement of bridge-type transducers such as load
cells, strain gauges, and temperature transducers.
The TC7109A provides a versatile digital interface. In
the direct mode, chip select and HIGH/LOW byte enables
control parallel bus interface. In the handshake mode, the
TC7109A will operate with industry-standard UARTs in
controlling serial data transmission — ideal for remote
data logging. Control and monitoring of conversion timing
is provided by the RUN/HOLD input and STATUS output.
For applications requiring more resolution, see the
TC500, 15-bit plus sign ADC data sheet.
The TC7109A has improved overrange recovery per-
formance and higher output drive capability than the origi-
nal TC7109. All new (or existing) designs should specify
the TC7109A wherever possible.
FUNCTIONAL BLOCK DIAGRAM
INPUT
HI
AZ
BUFF
CAZ
INT
BUFFER
–
INTEGRATOR
AZ
ZI
AZ
ZI
DE
(+)
AZ
INT
AZ
COMPARATOR
COMP
35
31
30
CREF
AZ
DE (
±
)
ZI
33
34
COMMON
INPUT
LO
INT
37
36
REF
IN
DE
(–)
DE
(–)
DE
(+)
RINT
–
CINT
38
39
REF
REF
ZI
6.2V
10
μ
A
28
40
V+
V–
29
REF
OUT
17
3
4
5
6
7
8
9 10 11 12 13 14
2
26
22
23
24
25
21
TO
ANALOG
COMP OUT
AZ
INT
DE (
±
)
ZI
CCONTROL
LOGIC
AND CLOCK
CIRCUITRY
HALOGIC
15 16
27
18
19
20
LBEN
HBEN
CE/LOAD
1
GND
14 LATCHES
12-BIT COUNTER
16 THREE-STATE OUTPUTS
SEND
MODE
BUF
OSC
OSC
IN
RUN/
HOLD
STATUS
P
O
T
HIGH-ORDER
B1
BLOW-ORDER
TC7109A
+
+
IN–
B1
B1
B9
B8
B7
B6
B5
B4
B3
B2
B1
LATCH
CLOCK
32
+
+
–
+
–
TC7109/A-7 11/6/96
相關PDF資料 |
PDF描述 |
|---|---|
| TC7109 | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
| TC7109A | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
| TC7109ACLW | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
| TC7109ACPL | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
| TC7109CLW | 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS |
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