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參數資料
| 型號： | AD9957 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC |
| 中文描述： | 1 GSPS的正交數字上變頻器與18位智商數據路徑和14位DAC |
| 文件頁數： | 9/60頁 |
| 文件大?。?/td> | 840K |
| 代理商： | AD9957 |
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AD9957
Rev. 0 | Page 9 of 60
Table 3. Pin Function Descriptions
Pin No.
1, 24, 61, 72, 86,
87, 93, 97 to 100
2
3, 6, 89, 92
74 to 77, 83
17, 23, 30, 47, 57,
64
11, 15, 21, 28, 45,
56, 66
4, 5, 73, 78, 79, 82,
85, 88, 96
13, 16, 22, 29, 46,
58, 62, 63, 65
7
Mnemonic
NC
I/O
1
Description
Not Connected. Allow device pin to float.
PLL_LOOP_FILTER
AVDD (1.8V)
AVDD (3.3V)
DVDD (1.8V)
I
I
I
I
PLL-Loop Filter Compensation. See External PLL Loop Filter Components section.
Analog Core VDD. 1.8 V analog supplies.
Analog DAC VDD. 3.3 V analog supplies.
Digital Core VDD. 1.8 V digital supplies.
DVDD_I/O (3.3V)
I
Digital Input/Output VDD. 3.3 V digital supplies.
AGND
I
Analog Ground.
DGND
I
Digital Ground.
SYNC_IN+
I
Synchronization Signal, Digital Input (Rising Edge Active). Synchronization signal from
external master to synchronize internal subclocks. See the Synchronization of Multiple
Devices section.
Synchronization Signal, Digital Input (Falling Edge Active). Synchronization signal from
external master to synchronize internal subclocks. See the Synchronization of Multiple
Devices section.
Synchronization Signal, Digital Output (Rising Edge Active). Synchronization signal from
internal device subclocks to synchronize external slave devices. See the Synchronization
of Multiple Devices section.
Synchronization Signal, Digital Output (Falling Edge Active). Synchronization signal from
internal device subclocks to synchronize external slave devices. See the Synchronization
of Multiple Devices section.
Synchronization Sample Error, Digital Output (Active High). A high on this pin indicates
that the AD9957 did not receive a valid sync signal on SYNC_IN+/SYNC_IN. See the
Synchronization of Multiple Devices section.
Master Reset, Digital Input (Active High). This pin clears all memory elements and sets
registers to default values.
External Power-Down, Digital Input (Active High). A high level on this pin initiates the
currently programmed power-down mode. See the Power-Down section of this
document for further details. If unused, tie to ground.
PLL Lock, Digital Output (Active High). A high on this pin indicates that the clock
multiplier PLL has acquired lock to the reference clock input.
CCI Overflow Digital Output, Active High. A high on this pin indicates a CCI filter overflow.
This pin remains high until the CCI overflow condition is cleared.
Parallel Data Input Bus (Active High). These pins provide the interleaved, 18-bit, digital, I
and Q vectors for the modulator to upconvert.
In Blackfin interface mode, this pin serves as the I-data serial input.
In Blackfin interface mode, this pin serves as the Q-data serial input.
Parallel Data Clock, Digital Output (Clock). See the Signal Processing section for details.
Transmit Enable, Digital Input (Active High). See the Signal Processing section for details.
FS Input. In Blackfin interface mode, this pin serves as the FS input to receive the RFS
output signal from the Blackfin.
RAM Trigger, Digital Input (Active High). This pin provides control for the RAM amplitude
scaling function. When this function is engaged, a high sweeps the amplitude from the
beginning RAM address to the end. A low sweeps the amplitude from the end RAM
address to the beginning. If unused, connect to ground or supply.
Profile Select Pins, Digital Inputs (Active High). These pins select one of eight
phase/frequency profiles for the DDS core (single tone or carrier tone). Changing the state
of one of these pins transfers the current contents of all I/O buffers to the corresponding
registers. State changes should be set up to the SYNC_CLK pin.
Output System Clock/4, Digital Output (Clock). The I/O_UPDATE and PROFILE<2:0> pins
should be set up to the rising edge of this signal.
8
SYNC_IN
I
9
SYNC_OUT+
O
10
SYNC_OUT
O
12
SYNC_SMP_ERR
O
14
MASTER_RESET
I
18
EXT_PWR_DWN
I
19
PLL_LOCK
O
20
CCI_OVFL
O
25 to 27, 31 to 39,
42 to 44, 48 to 50
42
43
40
41
41
D<17:0>
I
SPORT I-DATA
SPORT Q-DATA
PDCLK/TSCLK
TxENABLE
FS
I
I
O
I
I
51
RT
I
52 to 54
PROFILE<2:0>
I
55
SYNC_CLK
O
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| AD9957BSVZ | 功能描述:IC DDS 1GSPS 14BIT IQ 100TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數字合成 (DDS) 系列:- 產品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調節字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD9957BSVZ-REEL | 功能描述:IC DDS 1GSPS 14BIT IQ 100TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數字合成 (DDS) 系列:- 產品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調節字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
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