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參數(shù)資料
| 型號(hào)： | AD7655ASTZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 6/28頁(yè) |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 1MSPS QUAD 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 135mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤(pán) |
| 輸入數(shù)目和類(lèi)型： | 2 個(gè)差分，單極 |
| 產(chǎn)品目錄頁(yè)面： | 778 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7655CBZ-ND - BOARD EVALUATION FOR AD7655 |
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AD7655
Rev. B | Page 14 of 28
APPLICATION INFORMATION
CIRCUIT INFORMATION
The AD7655 is a very fast, low power, single-supply, precise
simultaneous sampling 16-bit ADC.
The AD7655 provides the user with two on-chip, track-and-
hold, successive approximation ADCs that do not exhibit any
pipeline or latency, making it ideal for multiple multiplexed
channel applications. The AD7655 can also be used as a
4-channel ADC with two pairs simultaneously sampled.
The AD7655 can be operated from a single 5 V supply and be
interfaced to either 5 V or 3 V digital logic. It is housed in a
48-lead LQFP or a tiny, 48-lead LFCSP that combines space
savings and allows flexible configurations as either a serial or
parallel interface. The AD7655 is pin-to-pin compatible with
PulSAR ADCs.
MODES OF OPERATION
The AD7655 features two modes of operation, normal mode
and impulse mode. Each of these modes is suitable for specific
applications.
Normal mode is the fastest mode (1 MSPS). Except when it is
powered down (PD = HIGH), the power dissipation is almost
independent of the sampling rate.
Impulse mode, the lowest power dissipation mode, allows
power saving between conversions. The maximum throughput
in this mode is 888 kSPS. When operating at 20 kSPS, for
example, it typically consumes only 2.6 mW. This feature makes
the AD7655 ideal for battery-powered applications.
TRANSFER FUNCTIONS
The AD7655 data format is straight binary. The ideal transfer
The LSB size is 2 × VREF/65536, which is about 76.3 μV.
000...000
000...001
000...010
111...101
111...110
111...111
ANALOG INPUT
+FS – 1.5 LSB
+FS – 1 LSB
–FS + 1 LSB
–FS
–FS + 0.5 LSB
ADC
CODE
(S
tra
ight
Bina
ry
)
03536-016
Figure 16. ADC Ideal Transfer Function
Table 7. Output Codes and Ideal Input Voltages
Description
Analog Input
VREF = 2.5 V
Digital Output Code
FSR 1 LSB
4.999924 V
0xFFFF1
FSR 2 LSB
4.999847 V
0xFFFE
Midscale + 1 LSB
2.500076 V
0x8001
Midscale
2.5 V
0x8000
Midscale 1 LSB
2.499924 V
0x7FFF
FSR + 1 LSB
76.29 μV
0x0001
FSR
0 V
0x00002
1 This is also the code for overrange analog input:
(V
– V
above 2 × (V
– V
)).
INx
INxN
REF
REFGND
2 This is also the code for underrange analog input (VINx below VINxN).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7655ASTZ | 制造商:Analog Devices 功能描述:CONVERTER A/D ((NW)) |
| AD7655ASTZRL | 功能描述:IC ADC 16BIT 4CHAN 48LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類(lèi)型:1 個(gè)單端，單極；1 個(gè)單端，雙極 |
| AD7655SCP-EP-RL | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:LOW COST 4-CHANNEL 1 MSPS 16-BIT ADC - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:IC ADC 16B PAR/SRL 1MSPS 48LFCSP 制造商:Analog Devices 功能描述:Analog to Digital Converters - ADC 4Ch 1MSPS 16-Bit Low Cost 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| AD7656 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC |
| AD7656-1 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC |
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