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| 型号： | AD7657BSTZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 6CH 250KSPS 64-LQFP |
| 标准包装： | 1,500 |
| 位数： | 14 |
| 采样率（每秒）： | 250k |
| 数据接口： | 串行，并联 |
| 转换器数目： | 6 |
| 功率耗散（最大）： | 143mW |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 6 个单端，双极 |
| 配用： | EVAL-AD7657-1EDZ-ND - BOARD EVAL CONTROL AD7657-1 EVAL-AD7657CBZ-ND - BOARD EVAL FOR AD7657 |
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Data Sheet
AD7656/AD7657/AD7658
Rev. D | Page 11 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
64
DB15
63
W
R/
RE
F
E
N/
DI
S
62
H
/S
SE
L
61
SER
/P
AR/
S
E
L
60
A
V
CC
59
AG
ND
58
RE
F
CAP
C
57
AG
ND
56
RE
F
CAP
B
55
AG
ND
54
RE
F
CA
P
A
53
AG
ND
52
AG
ND
51
R
E
FIN
/R
E
FOU
T
50
A
V
CC
49
AG
ND
47
AVCC
46
AVCC
45
V5
42
V4
43
AGND
44
AGND
48
V6
41
AVCC
40
AVCC
39
V3
37
AGND
36
V2
35
AVCC
34
AVCC
33
V1
38
AGND
2
DB13
3
DB12
4
DB11
7
DB8/DOUT A
6
DB9/DOUT B
5
DB10/DOUT C
1
DB14/REFBUFEN/DIS
8
DGND
9
VDRIVE
10
DB7/HBEN/DCEN
12
DB5/DCIN A
13
DB4/DCIN B
14
DB3/DCIN C
15
DB2/SEL C
16
DB1/SEL B
11
DB6/SCLK
17
DB0/
S
E
L
A
18
BUS
Y
19
CS
20
RD
21
CO
NV
S
T
C
22
CO
NV
S
T
B
23
CO
NV
S
T
A
24
ST
B
Y
25
DG
ND
26
DV
CC
27
RANG
E
28
R
ESET
29
W/B
30
V
SS
31
V
DD
32
AG
ND
PIN 1
AD7656/AD7657/AD7658
TOP VIEW
(Not to Scale)
05020-
003
Figure 3. Pin Configuration
Table 7. Pin Function Descriptions
Pin No.
Mnemonic
Description
54, 56, 58
REFCAPA, REFCAPB,
REFCAPC
Decoupling capacitors are connected to these pins. This decouples the reference buffer for each
ADC pair. Each REFCAP pin should be decoupled to AGND using 10 F and 100 nF capacitors.
33, 36, 39,
42, 45, 48
V1 to V6
Analog Input 1 to 6. These are six single-ended analog inputs. In hardware mode, the analog input
range on these channels is determined by the RANGE pin. In software mode, it is determined by
Bit RNGC to Bit RNGA of the control register (see Table 10).
32, 37, 38, 43,
44, 49, 52, 53,
55, 57, 59
AGND
Analog Ground. Ground reference point for all analog circuitry on the AD7656/AD7657/AD7658.
All analog input signals and any external reference signal should be referred to this AGND voltage.
All 11 of these AGND pins should be connected to the AGND plane of a system. The AGND and
DGND voltages should ideally be at the same potential and must not be more than 0.3 V apart,
even on a transient basis.
26
DVCC
Digital Power, 4.75 V to 5.25 V. The DVCC and AVCC voltages should ideally be at the same potential
and must not be more than 0.3 V apart, even on a transient basis. This supply should be decoupled
to DGND, and 10 F and 100 nF decoupling capacitors should be placed on the DVCC pin.
9
VDRIVE
Logic Power Supply Input. The voltage supplied at this pin determines the operating voltage of
the interface. Nominally at the same supply as the supply of the host interface. This pin should be
decoupled to DGND, and 10 F and 100 nF decoupling capacitors should be placed on the VDRIVE pin.
8, 25
DGND
Digital Ground. This is the ground reference point for all digital circuitry on the AD7656/AD7657/AD7658.
Both DGND pins should connect to the DGND plane of a system. The DGND and AGND voltages should
ideally be at the same potential and must not be more than 0.3 V apart, even on a transient basis.
34, 35, 40,
41, 46, 47,
50, 60
AVCC
Analog Supply Voltage, 4.75 V to 5.25 V. This is the supply voltage for the ADC cores. The AVCC and
DVCC voltages should ideally be at the same potential and must not be more than 0.3 V apart, even
on a transient basis. These supply pins should be decoupled to AGND, and 10 F and 100 nF
decoupling capacitors should be placed on the AVCC pins.
23, 22, 21
CONVST A,
CONVST B, CONVST C
Conversion Start Input A, B, C. These logic inputs are used to initiate conversions on the ADC pairs.
CONVST A is used to initiate simultaneous conversions on V1 and V2. CONVST B is used to initiate
simultaneous conversions on V3 and V4. CONVST C is used to initiate simultaneous conversions on
V5 and V6. When CONVSTx switches from low to high, the track-and-hold switch on the selected
ADC pair switches from track to hold and the conversion is initiated. These inputs can also be used
to place the ADC pairs into partial power-down mode.
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相关代理商/技术参数 |
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|---|---|
| AD7657YSTZ | 功能描述:IC ADC 14BIT 6CH 250KSPS 64LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 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-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7657YSTZ-1 | 功能描述:IC ADC 14BIT 6CH 250KSPS 64LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 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 |
| AD7657YSTZ-1-RL | 功能描述:IC ADC 14BIT 6CH 250KSPS 64LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 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 |
| AD7657YSTZ-REEL | 功能描述:IC ADC 14BIT 6CH 250KSPS 64LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 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 |
| AD7658 | 制造商:AD 制造商全称:Analog Devices 功能描述:250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC |
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