- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372199 > SP8527BS Micropower Sampling 10-Bit A/D Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | SP8527BS |
| 英文描述： | Micropower Sampling 10-Bit A/D Converter |
| 中文描述： | 微采樣10位A / D轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 180K |
| 代理商： | SP8527BS |
SP8527DS/01
SP8527 Micropower Sampling 10-Bit A/D Converter
5
Copyright 2000 Sipex Corporation
The device features automatic shutdown and
will shutdown to a +0.5
μ
A power level as CS
is brought high (de-selected). Power is propor-
tional to conversion duty cycle and varies from
230
μ
A at 26.1
μ
S (Duty cycle = 100%) to
5.75
μ
A at 1.04 ms (Duty cycle = 2.5%).
Examples:
Conversion rate
26.1
μ
S
52.2
μ
S
104
μ
S
1.04 mS
The device is configured such that it
delivers serial data MSB first requiring 13 clock
periods for a full conversion. Please refer to the
timing diagram.
I
CC
@ 5V
230
μ
A
115
μ
A
57.5
μ
A
5.75
μ
A
Duty Cycle
100%
50%
25%
2.5%
Circuit Operation
The
SP8527
is a SAR converter with full
differential sampled front end, capacitive DAC,
precision comparator, Successive Approxima-
tions Register, control logic and data output reg-
ister. After the input is sampled and held the
conversion process begins. The DAC MSB is
set and its output is compared with the signal
input, if the DAC output is less than the input,
the comparator outputs a one which is latched
into the SAR and simultaneously made
available at the ADC serial output pin. Each bit
is tested in a similar manner until the SAR
contains a code which represents the signal input
to within +1/2 LSB. During this process the SAR
content has been shifted out of the ADC serially.
The data appears at the DOUT pin MSB through
LSB in 13 clock periods. Note that the Chip
Select Bar pin must be toggled high between
conversions. The DOUT pin will be in a high
impedance state whenever Chip Select Bar is high.
After Chip Select Bar has been toggled and brought
low again, the converter begins a new conversion.
DESCRIPTION
The
SP8527
is a 10 bit full differential
sampling ADC with a serial data interface. The
ADC samples and converts 10 bits of data in
26.1
μ
S with a 5V supply voltage applied. The
SP8527
will also operate at a 3.3V supply at
39.2
μ
S throughput. The device automatically
shuts down to a +0.5
μ
A (MAX) level as soon
as the chip is deselected (CS=1). Serial data
output is available in an MSB first format.
FEATURES
The input sampling scheme is full differential,
where the maximum full scale range is V
. The
signal is applied between +IN and -IN. The
signals applied at each input may both be
dynamic. This is in contrast with pseudo differ-
ential devices which must have input low held
at a constant level during conversion. The
converter will provide significant common mode
rejection because of the full differential
sampling. Each input independently must
remain between ground and Vcc to avoid
clamping the inputs. For proper conversion the
differential input (+IN - -IN) must be less than
or equal to Vref.
The device uses a capacitive DAC architecture
which provides the sampling behavior. This
results in full Nyquist performance at the
fastest throughput rate (38.3kHz) the device is
capable of.
The power supply voltage is variable from 3.0V
to 5.5V which provides supply flexibility. At the
5.0V supply level, conversion plus sampling
time is 26.1
μ
S and supply current is 230
μ
A
(1.15 mW). With a 3.3V supply the conversion
plus sampling time is 39.2
μ
S and current is
reduced to 80
μ
A (0.26 mW).
INPUT VOLTAGE
(+IN - -IN)
INPUT VOLTAGE
AT V
REF
= 5V
0V
0.0049V
2.5000V
4.9902V
4.9951V
OUTPUT
CODE
0 LSB
1 LSB
512 LSB
1022 LSB
1023 LSB
0000000000
0000000001
1000000000
1111111110
1111111111
ADC TRANSFER FUNCTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP8527KN | Micropower Sampling 10-Bit A/D Converter |
| SP8527KS | Micropower Sampling 10-Bit A/D Converter |
| SP8528 | Micropower Sampling 12-Bit A/D Converter |
| SP8530 | S2ADC - Simultaneous Sampling Analog to Digital Converter |
| SP8530AN | S2ADC - Simultaneous Sampling Analog to Digital Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP8527KN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Micropower Sampling 10-Bit A/D Converter |
| SP8527KS | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Micropower Sampling 10-Bit A/D Converter |
| SP8528 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Micropower Sampling 12-Bit A/D Converter |
| SP8530 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:S2ADC - Simultaneous Sampling Analog to Digital Converter |
| SP8530AN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:S2ADC - Simultaneous Sampling Analog to Digital Converter |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。