参数资料
| 型号： | AD7655ACPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 6/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 4CHAN 48LFCSP |
| 标准包装： | 2,500 |
| 系列： | PulSAR® |
| 位数： | 16 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 135mW |
| 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： | 48-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 48-LFCSP-VQ（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个差分，单极 |
| 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).
相关PDF资料 |
PDF描述 |
|---|---|
| AD7656YSTZ-REEL | IC ADC 16BIT 6CH 250KSPS 64LQFP |
| AD7657YSTZ-1 | IC ADC 14BIT 6CH 250KSPS 64LQFP |
| AD7660ASTZRL | IC ADC 16BIT UNIPOLAR 48LQFP |
| AD7661ASTZ | IC ADC 16BIT W/REF 48-LQFP |
| AD7663ACPZ | IC ADC 16BIT CMOS 5V 48LFCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7655AST | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP 制造商:Analog Devices 功能描述:IC 16BIT ADC SMD 7655 LQFP48 |
| AD7655ASTRL | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP T/R |
| AD7655ASTZ | 功能描述:IC ADC 16BIT 1MSPS QUAD 48-LQFP 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 |
| 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 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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