AD7742: New Low-Cost, Single-Supply, MultiChannel Synchronous VFC
The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel ...More
AD7742: New Low-Cost, Single-Supply, MultiChannel Synchronous VFC
Product Description
The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel version in a 16-lead package (SOIC/ DIP). No user trimming is required to achieve the specified performance.
The AD7741 has a single buffered input whereas the AD7742 has four buffered inputs that may be configured as two fully-differential inputs or three pseudo-differential inputs. Both parts include an on-chip +2.5 V bandgap reference that provides the user with the option of using this internal reference or an external reference.
An evaluation board for both the AD7741 and the AD7742 is available. The model number is EVAL-AD7741/42EB, and details can be viewed by selecting the "Evaluation Tools" button to the left.
快速链接
- 产品数据手册 Rev 0,05/1999(pdf 131kB)
- (About Data Sheets)
- 无铅（Pb）数据
- 应用笔记
Features
- AD7741: One Single-Ended Input Channel
AD7742: Two Differential or Three Pseudo-Differential Input Channels - Integral Nonlinearity of 0.012% at fout(Max) = 2.75 MHz (AD7742) and at fout(Max) = 1.35 MHz (AD7741)
- Single +5 V Supply Operation
- Buffered Inputs
- Programmable Gain Analog Front-End
- On-Chip +2.5 V Reference
- Internal/External Reference Option
- Power Down to 35 µA Max
- Minimal External Components Required
- 8-Lead and 16-Lead DIP and SOIC Packages
Diagrams
- Enlarge
- 原理图符号和PCB封装
Functional Block Diagram for AD7742
New Low-Cost, Single-Supply, MultiChannel Synchronous VFC
Functional Block Diagram for AD7742
技术指标
| Architecture | Synchronous |
| # Channels | 2-Differential,3-Pseudo Differential |
| Input Voltage Range (V) | +3.5V |
| Full Scale Fout (kHz) | 3072kHz |
| Reference Voltage (V) | 2.5V |
| Accuracy (%/kHz) | 2 |
| Input Clk Frequency (MHz) | 6.144MHz |
| Voltage Supply (V) | 4.75 to 5.25 |
| Supply Current (max) | 8mA |
| Package | 16-Lead PDIP,16-Lead SOIC |
| Part# | Architecture | # Channels | Input Voltage Range (V) | Full Scale Fout (kHz) | Reference Voltage (V) | Accuracy (%/kHz) | Input Clk Frequency (MHz) | Voltage Supply (V) | Supply Current (max) | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AD537 | Non-Synchronous | 1-Single Ended | ±11 | 150 | 1 | 0.25 | - | +/- 5 to +/- 18 | 2.5 | 14-Lead CerDIP | $9.65 |
| AD650 | Non-Synchronous | 1-Single Ended | +11 | 1000 | - | 0.1 | - | +/- 9 to +/- 18 | 8 | 14-Lead CerDIP, 14-Lead PDIP, 20-Lead PLCC | $8.02 |
| AD652 | Synchronous | 1-Single Ended | ±10 | 2500 | 5 | 2 | 5 | +/- 6 to +/- 15 | 15 | 20-Lead PLCC | $9.92 |
| AD654 | Non-Synchronous | 1-Single Ended | ±14 | 500 | - | 0.4 | - | +/- 5 to +/- 18 | 2.5 | 8-Lead PDIP, 8-Lead SOIC | $3.76 |
| AD7740 | Synchronous | 1-Single Ended | +2.5 | 500 | 2.5 | 1 | 1 | 3 to 5.25 | 1.5 | 8-Lead MSOP, 8-Lead SOT-23 | $0.91 |
| AD7741 | Synchronous | 1-Single Ended | +2.5 | 3072 | 2.5 | 2 | 6.144 | 4.75 to 5.25 | 8 | 8-Lead PDIP, 8-Lead SOIC | $1.76 |
| AD7742 | Synchronous | 2-Differential, 3-Pseudo Differential | +3.5 | 3072 | 2.5 | 2 | 6.144 | 4.75 to 5.25 | 8 | 16-Lead PDIP, 16-Lead SOIC | - |
| ADVFC32 | Non-Synchronous | 1-Single Ended | +10 | 500 | - | 0.2 | - | +/- 9 to +/- 18 | 8 | 14-Lead PDIP | $6.14 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.