TC1322 MICROCHIP [Microchip Technology], TC1322 Datasheet

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TC1322

Manufacturer Part Number
TC1322
Description
12-Bit Digital-to-Analog Converter with Two-Wire Interface
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
Features
• 12-Bit Digital-to-Analog Converter
• 2.7-5.5V Single Supply Operation
• Simple SMBus/I
• Low Power: 350µA Operation, 0.5µA Shutdown
• 8-Pin SOIC and 8-Pin MSOP Packages
Applications
• Programmable Voltage Sources
• Digital Controlled Amplifiers/Attenuators
• Process Monitoring and Control
Device Selection Table
Typical Application
©
12-Bit Digital-to-Analog Converter with Two-Wire Interface
TC1322EOA 8-Pin SOIC (Narrow)
TC1322EUA
2002 Microchip Technology Inc.
Number
V
Part
IN
V
REF
8-Pin MSOP
2
C
Package
(1)
TM
Serial Interface
(3)
Microcontroller
Serial Port
SCLK
Temperature Range
-40°C to +85°C
-40°C to +85°C
(8)
DAC
SDAT
(2)
V
DD
TC1322
General Description
The TC1322 is a serially accessible 12-bit voltage out-
put digital-to-analog converter (DAC). The DAC pro-
duces an output voltage that ranges from ground to an
externally supplied reference voltage. It operates from
a single power supply that can range from 2.7V to 5.5V,
making it ideal for a wide range of applications. Built
into the part is a Power-on Reset function that ensures
that the device starts at a known condition.
Communication with the TC1322 is accomplished via a
simple 2-wire SMBus/I
the TC1322 acting as a slave only device. The host can
enable the SHDN bit in the CONFIG register to activate
the Low Power Standby mode.
Package Type
(5)
V
OUT
V
GND
SDA
SCL
REF
8-Pin SOIC (Narrow)
2
3
4
1
8-Pin MSOP and
TC1322
2
C compatible serial port with
TC1322
+
8
7
6
5
V
DAC-OUT
NC
V
DD
DS21388B-page 1
OUT
V
ADJUST

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TC1322 Summary of contents

Page 1

... Communication with the TC1322 is accomplished via a simple 2-wire SMBus/I the TC1322 acting as a slave only device. The host can enable the SHDN bit in the CONFIG register to activate the Low Power Standby mode. Package Type -40° ...

Page 2

... TC1322 Functional Block Diagram V DD Configuration Register SDA Serial Port Interface SCL Data Register DS21388B-page 2 TC1322 Control DAC–OUT V DAC V GND REF 2002 Microchip Technology Inc. © OUT ...

Page 3

... Voltage on any Pin .... (GND – 0.3V Current on any Pin ............................................ ±50mA Package Thermal Resistance (θ )............ 330°C C/W JA Operating Temperature (T )........................ See Below A Storage Temperature (T ) .............. -65°C to +150°C STG TC1322 ELECTRICAL SPECIFICATIONS = 2.7V to 5.5V, -40°C ≤ T Electrical Characteristics Symbol Parameter Power Supply V Supply Voltage DD I ...

Page 4

... TC1322 TC1322 ELECTRICAL SPECIFICATIONS (CONTINUED) = 2.7V to 5.5V, -40°C ≤ T Electrical Characteristics Symbol Parameter Serial Port AC Timing f SMBus Clock Frequency SMB t Bus Free Time Prior to New Transition IDLE t START Condition Hold Time H(START) t START Condition Setup Time SU(START) t STOP Condition Setup Time ...

Page 5

... Input. Voltage Reference Input can range from 0V to 1.2V below V Bi-directional. Serial data is transferred on the SMBus in both directions using this pin. Input Input. SMBus serial clock. Clocks data into and out of the TC1322. Power Ground. Output. Buffered DAC output voltage. This voltage is a function of the reference voltage and the contents of the DATA register ...

Page 6

... DS21388B-page 6 3.3 Standby Mode The TC1322 allows the host to put it into a Low Power (I = 0.5µA, typical) Standby mode. In this mode, the DD D/A conversion is halted. The SMBus port operates normally. Standby mode is enabled by setting the SHDN bit in the CONFIG register ...

Page 7

... R/W ACK Data S Address ACK 1 7-Bits Slave Address: repeated Data Byte: reads from due to change in data the register set by the flow direction. command byte. NACK P ACK Data P NACK 8-Bits TC1322 ACK P ACK ACK Data P 8-Bits NACK P 8-Bits Data ACK NACK P 8-Bits 8-Bits DS21388B-page 7 ...

Page 8

... Acknowledge (ACK) provides a positive handshake between the host and the TC1322. The host releases SDA after transmitting eight bits, then generates a ninth clock cycle to allow the TC1322 to pull the SDA line LOW to acknowledge that it successfully received the previous eight bits of data or address. ...

Page 9

... F = Acknowledge Bit Clocked into Master J = Acknowledge Clocked into Master G = MSB of Data Clocked into Slave K = Acknowledge Clock Pulse H = LSB of Data Clocked into Slave L = STOP Condition, Data Executed by Slave I = Slave Pulls SDA Line Low M = New START Condition TC1322 SU(STOP) IDLE ...

Page 10

... The DAC output voltage is a function of reference volt- age and the binary value of the contents of the register DATA. The transfer function is given by the expression: EQUATION 4-1: D[1] D[0] 4.7 Register Set Summary SHDN The TC1322’s register set is summarized in Table 4-5 Operation below. All registers are 12-bits wide Standby 0 = Normal TABLE 4-5: N/A Name Description ...

Page 11

... Standard Reel Component Orientation for TR Suffix Device Pitch (P) Part Per Full Reel 2500 User Direction of Feed P Standard Reel Component Orientation for TR Suffix Device Pitch (P) Part Per Full Reel 2500 TC1322 W Reel Size Reel Size 13 in DS21388B-page 11 ...

Page 12

... TC1322 5.3 Package Dimensions 8-Pin MSOP .122 (3.10) .114 (2.90) .026 (0.65) TYP. .122 (3.10) .114 (2.90) .016 (0.40) .006 (0.15) .010 (0.25) .002 (0.05) 8-Pin SOIC .157 (3.99) .150 (3.81) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) DS21388B-page 12 PIN 1 .197 (5.00) .189 (4.80) .043 (1.10) 6° MAX. MAX. .028 (0.70) .016 (0.40) PIN 1 .244 (6.20) .228 (5.79) .069 (1.75) .053 (1.35) ° ...

Page 13

... NOTES: 2002 Microchip Technology Inc. © TC1322 DS21388B-page 13 ...

Page 14

... TC1322 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. Your local Microchip sales office 2 ...

Page 15

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. © TC1322 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 16

W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Atlanta 500 Sugar Mill Road, ...

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