参数资料
| 型号： | AD9148BBPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 35/72页 |
| 文件大小： | 0K |
| 描述： | IC DAC 16BIT SPI/SRL 196BGA |
| 标准包装： | 1,500 |
| 系列： | TxDAC+® |
| 设置时间： | 20ns |
| 位数： | 16 |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 4 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 2.67W |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 196-LFBGA 裸露焊盘 |
| 供应商设备封装： | 196-BGA |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | 1G |
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AD9148
Data Sheet
Rev. B | Page 40 of 72
INPUT DATA PORTS
The AD9148 can operate in three data input modes: dual-port
mode, single-port mode, and byte mode. In dual-port mode,
DAC 1 and DAC 2 receive data from Port A, and DAC 3 and
DAC 4 receive data from Port B. In single-port mode, all four
DACs receive data from Port A. In byte mode, all four DACs
receive data from Port A, but the port is split into two 8-bit wide
buses. In all modes, the data input timing is relative to a DCI signal
provided with the data.
DUAL-PORT MODE
In dual-port mode, the DCI signal indicates to which DAC the
data is intended. On the rising edge of DCI, data is latched into
DAC 1 and DAC 3. On the falling edge of DCI, data is latched
into DAC 2 and DAC 4. This pattern repeats continuously.
There is a SPI programmable option (Register 0x14[6]) to provide
one DCI for both input ports or two DCIs, where each DCI is
associated with one input port. Two DCIs are useful when the
data for each port is coming from a different data source. These
cases are illustrated in Figure 45 and Figure 46.
DCIA
A[15:0]
DAC1
DAC2
DAC1
DAC2
DAC1
DAC2
DAC1
DAC2
DAC3
DAC4
DAC3
DAC4
DAC3
DAC4
DAC3
DAC4
B[15:0]
08910-
045
Figure 45. Timing Diagram for Dual-Port Mode, One DCI
DCIA
A[15:0]
DAC1
DAC2
DAC1
DAC2
DAC1
DAC2
DAC1
DAC2
DAC3
DAC4
DAC3
DAC4
DAC3
DAC4
DAC3
DAC4
B[15:0]
DCIB
08910-
046
Figure 46. Timing Diagram for Dual-Port Mode, Two DCI
Each data sample, by default, is expected to be formatted as an
MSB sent to Bit 15 and an LSB sent to Bit 0 for each port. The
AD9148 contains an option to swap the bus (Register 0x03[4]).
When this bus swap bit is set, the MSB should be sent to Bit 0,
and the LSB should be sent to Bit 15 for each port.
SINGLE-PORT MODE
In single-port mode, a FRAME signal must be provided along
with the DCI signal and the data. The FRAME signal indicates
to which DAC the data is intended. When FRAME goes high,
the first data-word goes to DAC 1, and the second data-word
goes to DAC 2. When FRAME goes low, the first data-word
goes to DAC 3, and the second data-word goes to DAC 4.
This pattern repeats continuously as illustrated in Figure 47.
FRAMEA
A[15:0]
DAC1
DAC2
DAC3
DAC4
DAC1
DAC2
DAC3
DAC4
DCIA
08910-
047
Figure 47. Timing Diagram for Single-Port Mode
Each data sample, by default, is expected to be formatted as an MSB
sent to Bit 15 and an LSB sent to Bit 0. When the bus swap bit is
set (Register 0x03[4]), the MSB should be sent to Bit 0, and the
LSB should be sent to Bit 15 for each port.
The FRAME signal is sampled with the same internal signal as
the data and has the same set-up and hold timing relative to DCI. If
desired, only the first FRAME pulse needs to be generated. This
initializes the internal clock phases inside the device, and data
latches just as if the periodic FRAME signal were sent.
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| AD9148-EBZ | 功能描述:BOARD EVALUATION FOR AD9148 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:TxDAC+® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| AD9148-M5372-EBZ | 功能描述:BOARD EVAL FOR AD9149, ADL5372 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| AD9148-M5375-EBZ | 功能描述:BOARD EVAL FOR AD9149, ADL5375 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
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