ADI公司的ADM1066是可配置的单片多种电源监视/定序器件,并集成了12位ADC和6个8位电压输出的DAC,所有电压在25度C的精度优于0.5%,主要用在中心办公系统,服务器/路由器,多电压系统线路卡,DSP/FPGA电压定序等.本文介绍了ADM1066主要特性,方框图, 应用框图以及ADM106x评估板主要特性,方框图和电路图,材料清单.

The ADM1066 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these functions, the ADM1066 integrates a 12-bit ADC and six 8-bit voltage output DACs. These circuits can be used to implement a closed-loop margining system that enables supply adjustment by altering either the feedback node or reference of a dc-to-dc converter using the DAC outputs.

Supply margining can be performed with a minimum of external components. The margining loop can be used for in-circuit testing of a board during production (for example, to verify board func-tionality at −5% of nominal supplies), or it can be used dynamically to accurately control the output voltage of a dc-to-dc converter。

ADM1066主要特性:

Complete supervisory and sequencing solution for up to 10 supplies

10 supply fault detectors enable supervision of supplies to

<0.5% accuracy at all voltages at 25°C

<1.0% accuracy across all voltages and temperatures

5 selectable input attenuators allow supervision of supplies to 14.4 V on VH

6 V on VP1 to VP4 (VPx)

5 dual-function inputs, VX1 to VX5 (VXx)

High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V

General-purpose logic input

10 programmable driver outputs, PDO1 to PDO10 (PDOx)

Open-collector with external pull-up

Push/pull output, driven to VDDCAP or VPx

Open collector with weak pull-up to VDDCAP or VPx

Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 only)

Sequencing engine (SE) implements state machine control of PDO outputs

State changes conditional on input events

Enables complex control of boards

Power-up and power-down sequence control

Fault event handling

Interrupt generation on warnings

Watchdog function can be integrated in SE

Program software control of sequencing through SMBus

Complete voltage-margining solution for 6 voltage rails

6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node

12-bit ADC for readback of all supervised voltages

2 auxiliary (single-ended) ADC inputs

Reference input (REFIN) has 2 input options

Driven directly from 2.048 V (±0.25%) REFOUT pin

More accurate external reference for improved ADC performance

Device powered by the highest of VPx, VH for improved redundancy

User EEPROM: 256 bytes

Industry-standard 2-wire bus interface (SMBus)

Guaranteed PDO low with VH, VPx = 1.2 V

Available in 40-lead, 6 mm × 6 mm LFCSP and 48-lead, 7 mm × 7 mm TQFP packages

ADM1066应用:

Central office systems

Servers/routers

Multivoltage system line cards

DSP/FPGA supply sequencing

In-circuit testing of margined supplies

图1. ADM1066方框图

图2. ADM1066应用框图

ADM106x评估板

Evaluation Kit for the ADM1062- ADM1069 Super Sequencers™

The ADM106x Evaluation Board is designed to provide all of the necessary stimuli to the ADM106x, showing the many features of the device in a compact, self contained environment. The following pages contain a simple block diagram of the functions on the board, followed by a detailed schematic of the board and finally, the tracking, power and silkscreen layers for board.

The two main features of the board are the programmable voltage circuits and the output indicator LED’s. There are eight programmable voltage circuits provided. The circuits are labeled VX1, VX2, VX3, VX4, VP1, VP2, VP3, VP4. These are programmable, via the Eval Board software, over a voltage range of 0.6V to 6V. Programming of these supplies is detailed in the software section of this Eval Note. The eight circuits provide voltages to eight of the ten inputs to the ADM106x. The inputs which do not have a programmable supply are VX5 (where a test point is available for the user for their own external input) and VH, which has 12V driving it directly (or alternatively, uses the programmable supply of VP4, if required).

The ten output indicator LED’s are labeled PDO1 to PDO10. These indicate a logic high on the output pins of the ADM106x. The LED’s for PDO1- 6 are dual colour LED’s. This is to indicate when a PDO is being used as a logic output or as a FET driver output. Green indicates a logic output while red indicates a FET driver output.

ADM106x评估板包括:

• Main Evaluation Board: This board contains all of the circuitry necessary to active stimulate the ADM1062-69 devices and monitor its response, such as programmable supplies, ADCs, LEDs, etc.

• Daughter-card Socket: A relevant daughter-card with a device socket is also supplied. There are three different daughter-card options for the main evaluation board depending on the package option- LFCSP, TQFP or LQFP. The daughter-card plugs directly into the main evaluation board and allows all the devices in their specific layouts to be used in conjunction with the main evaluation board. The correct one will be supplied for the devices included in the kit.

• Device Samples: Some loose samples of the device to be evaluated are included in a samples box. A single device should be placed in the socket before powering up the evaluation board.

• SMBus Cable: This cable connects the main evaluation board to a standard PC parallel connector. Power must be applied to the board separately if using this cable.

• USB Cable: This cable connects the main evaluation board to a standard PC USB port. Power for the evaluation board will also be provided by the PC USB interface.

图3.ADM106x评估板方框图

图4.ADM106x评估板电路图:ADM106x电路

图5.ADM106x评估板电路图:ADM106x PDO输出电路

图6.ADM106x评估板电路图:可编程输入电压电路

图7.ADM106x评估板电路图:板控制FPGA电路

图8.ADM106x评估板电路图:板电源和USB接口电路

图9.ADM106x评估板电路图:板电压测量电路

图10.ADM106x评估板元件布局图

详情请见:
http://www.analog.com/static/imported-files/data_sheets/ADM1066.pdf
和
http://www.analog.com/static/imported-files/eval_boards/adm106x_eb_pB.pdf