- 您现在的位置：买卖IC网 > PDF目录10555 > AD7690BCPZRL7 (Analog Devices Inc)IC ADC 18BIT 400KSPS 10-LFCSP PDF资料下载
参数资料
| 型号： | AD7690BCPZRL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT 400KSPS 10-LFCSP |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| 位数： | 18 |
| 采样率（每秒）： | 400k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 20mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘，CSP |
| 供应商设备封装： | 10-LFCSP-WD（3x3） |
| 包装： | 标准包装 |
| 输入数目和类型： | 1 个差分，双极 |
| 其它名称： | AD7690BCPZRL7DKR |
AD7690
Rev. B | Page 16 of 24
POWER SUPPLY
The AD7690 uses two power supply pins: a core supply, VDD, and
a digital input/output interface supply, VIO. VIO allows a direct
interface with any logic between 1.8 V and VDD. To reduce the
number of supplies needed, the VIO and VDD pins can be tied
together. The AD7690 is independent of power supply sequencing
between VIO and VDD. Additionally, it is very insensitive to power
supply variations over a wide frequency range, as shown in Figure 31.
95
65
1
10000
FREQUENCY (kHz)
P
S
RR
(
d
B)
05
79
2-
03
5
90
85
80
75
70
10
100
1000
Figure 31. PSRR vs. Frequency
The AD7690 powers down automatically at the end of each
conversion phase and, therefore, the power scales linearly with
the sampling rate. This makes the part ideal for low sampling
rates (even of a few hertz) and low battery-powered applications.
1000
10
0.1
0.001
10
1M
SAMPLING RATE (SPS)
O
P
E
RAT
ING
C
URRE
N
T
(
A
)
05
79
2-
04
5
100
1k
100k
10k
VDD = 5V
VIO
0.01
1
100
10000
Figure 32. Operating Current vs. Sample Rate
SUPPLYING THE ADC FROM THE REFERENCE
For simplified applications, the AD7690, with its low operating
current, can be supplied directly using the reference circuit
shown in Figure 33. The reference line can be driven by
The system power supply directly.
A reference voltage with enough current output capability,
such as the ADR43x.
A reference buffer, such as the AD8031, which can also
filter the system power supply, as shown in Figure 33.
AD8031
AD7690
VIO
REF
VDD
10F
1F
10
10k
5V
1F
1
05
79
2-
0
46
1OPTIONAL REFERENCE BUFFER AND FILTER.
Figure 33. Example of Application Circuit
DIGITAL INTERFACE
Though the AD7690 has a reduced number of pins, it offers
flexibility in its serial interface modes.
When in CS mode, the AD7690 is compatible with SPI, QSPI,
digital hosts, and DSPs, for example, Blackfin ADSP-BF53x or
ADSP-219x. In this mode, the AD7690 can use either a 3-wire
or 4-wire interface. A 3-wire interface using the CNV, SCK, and
SDO signals minimizes wiring connections useful, for instance,
in isolated applications. A 4-wire interface using the SDI, CNV,
SCK, and SDO signals allows CNV, which initiates the conversions,
to be independent of the readback timing (SDI). This is useful
in low jitter sampling or simultaneous sampling applications.
When in chain mode, the AD7690 provides a daisy-chain
feature using the SDI input for cascading multiple ADCs on a
single data line similar to a shift register.
The mode in which the part operates depends on the SDI level
when the CNV rising edge occurs. The CS mode is selected if
SDI is high, and the chain mode is selected if SDI is low. The
SDI hold time is such that when SDI and CNV are connected
together, the chain mode is selected.
In either mode, the AD7690 offers the option of forcing a start
bit in front of the data bits. This start bit can be used as a busy
signal indicator to interrupt the digital host and trigger the data
reading. Otherwise, without a busy indicator, the user must
timeout the maximum conversion time prior to readback.
The busy indicator feature is enabled
In CS mode if CNV or SDI is low when the ADC conversion
ends (see
and
).
In chain mode if SCK is high during the CNV rising edge
(see Figure 45).
相关PDF资料 |
PDF描述 |
|---|---|
| VI-JT4-MW-S | CONVERTER MOD DC/DC 48V 100W |
| EL4583AIS-T13 | IC SYNC SEPARATOR S-H 50% 16SOIC |
| VI-JT4-MW-F4 | CONVERTER MOD DC/DC 48V 100W |
| VI-JT4-MW-F3 | CONVERTER MOD DC/DC 48V 100W |
| MAX1162BEUB+ | IC ADC 16BIT 200KSPS 10-UMAX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7690BRMZ | 功能描述:IC ADC 18BIT 400KSPS 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| AD7690BRMZ-RL7 | 功能描述:IC ADC 18BIT 400KSPS 10-MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7690BRNZ | 制造商:Analog Devices 功能描述: |
| AD7691 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit Lower Power |
| AD76911 | 制造商:AD 制造商全称:Analog Devices 功能描述:18-Bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN) |
发布紧急采购，3分钟左右您将得到回复。