參數(shù)資料
型號(hào)： MAX769EEI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 通信及網(wǎng)絡(luò)
英文描述： 2 or 3-Cell, Step-Up/Down, Two-Way Pager System IC
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO28
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-28
文件頁(yè)數(shù)： 10/16頁(yè)
文件大小： 161K
代理商： MAX769EEI
M
2 or 3-Cell, S tep-Up/Down,
Two-Way Pager S ystem IC
10
______________________________________________________________________________________
7-Bit ADC (CH0 Input and CH1, CH2)
Three analog channels are compared to a 7-bit, serially
programmed digital-to-analog converter (CH DAC). The
CH DAC voltage can be varied in 10mV steps from
200mV to V
REF
- 1LSB (or 1.27V) (Table 1). CH0 is an
external input, while CH1 and CH2 are signals internally
generated from the NICD and BATT pins. NICD and
BATT are internally divided by four before being com-
pared to CH DAC. The comparison threshold voltages
for each channel are described in the following equa-
tions:
V
TH
(CH0: pin 9) = D x 10mV
V
TH
(CH1: NICD) = D x 40mV
V
TH
(CH2: BATT) = D x 40mV
where D is the decimal equivalent of the binary code
DAC0–DAC6 (Table 1). DAC0 is the LSB. A DAC code
of 1111111 equates to D = 127. When all zeros are pro-
grammed, the CH DAC and CH_ comparators turn off.
CH0, CH1, and CH2 comparison results reside in the
three MSB locations of the output serial data (Table 4).
The CH_ OUT data is delayed by one read cycle. In
other words, each CH_ OUT bit is the result of the com-
parison made against the CH DAC voltage programmed
during the previous serial-write operation.
An analog-to-digital (A/D) conversion can be performed
on a channel by using the system software to step
through a successive-approximation routine or, if the
input is partially known, by setting the CH DAC to a
voltage near the estimated point and checking succes-
sive CH_ OUT bits.
MAX769
2 OR 3-CELL
AA ALKALINE
BATTERY
BATT
26
1
11
6
9
27
5
2
3
28
25
4
24
22
14
21
20
10
7
23
15
C
OFS
0.1
μ
F
3.0V
LOGIC
2.85V
ANALOG
1V RCVR
R4
470k
R3
1.3M
100k
3-CELL
NiCd
TORF
PA
R
OFS
, 15k
LX2
OUT
PGND
REG1
R2IN
OFS
REG2
L1
68
μ
H
D1
MBR0520L
C6
0.1
μ
F
C1
47
μ
F
C2
10
μ
F
C3
10
μ
F
TO
μ
C
RESET
C4
1
μ
F
C5
22
μ
F
SERIAL
I/O
A/D IN
R5
270k
17
19
18
16
13
12
8
1.8
DRIVERS
38.4kHz
C10
22nF
C8
1
μ
F
C9
1nF
REG3
RSIN
RSO
NICD
AGND
LBI
R1
1M
R2
250k
REG1
LBO
CH0
CS
SCL
SDI
SDO
DR1
DR2
DR2IN
DRGND
SYNC
FILT
REF
LX1
10k
Figure 2. Standard Application Circuit
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參數(shù)描述
MAX769EEI+ 功能描述:PMIC 解決方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
MAX769EEI+T 功能描述:PMIC 解決方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
MAX769EEI-T 功能描述:PMIC 解決方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
MAX769EVKIT 功能描述:電源管理IC開(kāi)發(fā)工具 Evaluation Kit for the MAX769 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
MAX7705CPA 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
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