參數(shù)資料
型號: AME7106ACKW
廠商: AME, Inc.
元件分類: 顯示驅(qū)動器
英文描述: 3-1/2 Digit A/D Converter High Accuracy, Low Power
中文描述: 3-1/2位A / D轉(zhuǎn)換高精度,低功耗
文件頁數(shù): 10/20頁
文件大?。?/td> 1425K
代理商: AME7106ACKW
AME, Inc.
10
AME7106/AME7106A/AME7106R
AME7107/AME7107A/AME7107R
3-1/2 Digit A/D Converter
High Accuracy, Low Power
n
Digital Section
Digital Ground
AME7106 generates an internal digital ground, typically
5V below the V+. The digital ground of AME7107 is
supplied externally.
Clock Circuit
The clock can be generated in either of the following
three methods.
1. An external oscillator connected to“OSC1”
2. A crystal between pins” OSC1” and “OOSC2”
3. A R-C oscillator using “OOSC1”, “OOSC2” and
“OSC3”
Notes: There is no on-chip feedback resister across osc1
and osc2.
Systems Timing
The oscillator frequency is divided by 4 prior to clock-
ing the internal decade counters. Each conversion takes
4000 counts or 16000 oscillator clock pulses. The tim-
ing of each phase are as follows:
Auto-Zero Phase:
Signal Integration Phase:
Reference Integration Phase : 0 to 2000 Counts
1000 to 3000 Counts
1000 Counts (Fixed)
For signals less than full-
The A/D conversion has the
following three phases:
scale, the unused reference
integration time is assigned to the autozero phase.
Segment Drivers (AME7106)
The backplane frequency is 1/800 of the oscillator clock
frequency. For example if the oscillator frequency is
48 KHz (3 conversions per second) the backplane fre-
quency will be 60 Hz. The segment and backplane are
at the same frequency with a nominal 5 volt amplitude.
The segment is visible (ON) when the segment and the
backplane are out of phase, otherwise it is invisible
(OFF). The polarity segment is “ON” for negative ana-
log inputs. When the TEST pin on the AME7106 is
pulled to V+, all segments are turned “ON”. The dis-
play reads -1888. During this mode the LCD segments
have a constant DC voltage impressed. DO NOT LEAVE
THE DISPLAY IN THIS MODE FOR MORE THAN
SEVERAL MINUTES! LCD displays may be destroyed
if operated with DC levels for extended periods.
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