参数资料
| 型号： | AD7626BCPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 10MSPS DIFF 32LFCSP |
| 设计资源： | Single-Ended-to-Differential High Speed Drive Circuit for 16-Bit, 10 MSPS AD7626 ADC (CN0105) |
| 特色产品： | AD7626 PulSAR Differential ADC |
| 标准包装： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 10M |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 170mW |
| 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： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ（5x5） |
| 包装： | 托盘 |
| 输入数目和类型： | 2 个单端，单极；1 个差分，双极 |
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AD7626
Data Sheet
Rev. B | Page 16 of 28
TRANSFER FUNCTIONS
The AD7626 uses a 4.096 V reference. The AD7626 converts
the differential voltage of the antiphase analog inputs (IN+
and IN) into a digital output. The analog inputs, IN+ and IN,
require a 2.048 V common-mode voltage (REF/2).
The 16-bit conversion result is in MSB first, twos complement
format.
The ideal transfer functions for the AD7626 are shown in
100 ... 000
100 ... 001
100 ... 010
011 ... 101
011 ... 110
011 ... 111
AD
C
CO
DE
(
T
W
O
S
C
O
M
P
L
E
M
E
NT
)
ANALOG INPUT
+FSR – 1.5LSB
+FSR – 1LSB
–FSR + 1LSB
–FSR
–FSR + 0.5LSB
0
76
48
-03
1
Figure 28. ADC Ideal Transfer Functions (FSR = Full-Scale Range)
Table 7. Output Codes and Ideal Input Voltages
Description
Analog Input
(IN+ IN)
REF = 4.096 V
Digital Output Code
Twos Complement (Hex)
FSR 1 LSB
+4.095875V
0x7FFF
Midscale + 1 LSB
+125 μV
0x0001
Midscale
0 V
0x0000
Midscale 1 LSB
125 μV
0xFFFF
FSR + 1 LSB
4.095875 V
0x8001
FSR
4.096 V
0x8000
ANALOG INPUTS
The analog inputs, IN+ and IN, applied to the AD7626 must be
180° out of phase with each other. Figure 29 shows an equivalent
circuit of the input structure of the AD7626.
The two diodes provide ESD protection for the analog inputs,
IN+ and IN. Care must be taken to ensure that the analog input
signal does not exceed the reference voltage by more than 0.3 V.
If the analog input signal exceeds this level, the diodes become
forward-biased and start conducting current. These diodes can
handle a forward-biased current of 130 mA maximum. However,
if the supplies of the input buffer (for example, the supplies of
the ADA4899-1 in Figure 33) are different from those of the
reference, the analog input signal may eventually exceed the
supply rails by more than 0.3 V. In such a case (for example, an
input buffer with a short circuit), the current limitation can be
used to protect the part.
67 25pF
VDD1
CNV
IN+
OR IN–
0
76
48
-0
10
Figure 29. Equivalent Analog Input Circuit
The analog input structure allows the sampling of the true
differential signal between IN+ and IN. By using these differ-
ential inputs, signals common to both inputs are rejected. The
AD7626 shows some degradation in THD with higher analog
input frequencies.
45
50
55
60
65
70
75
1
10
100
1k
10k
100k
1M
10M
INPUT COMMON-MODE FREQUENCY (Hz)
CM
R
(
d
B)
0
76
48
-009
Figure 30. Analog Input CMRR vs. Frequency
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相关代理商/技术参数 |
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|---|---|
| AD7626BCPZ-RL7 | 功能描述:IC ADC 16BIT 10MSPS DIFF 32LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 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 |
| AD7628 | 制造商:AD 制造商全称:Analog Devices 功能描述:CMOS Dual 8-Bit Buffered Multiplying DAC |
| AD7628BFN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Digital-to-Analog Converter |
| AD7628BN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Digital-to-Analog Converter |
| AD7628BQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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