ADUC848 MicroConverter® Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU

The ADuC845, ADuC847, and ADuC848 are single-cycle, 12.58 MIPs, 8052 core upgrades to the ADuC834 and ADuC836. They include additional analog inputs for applications requiring more ADC channels.

The ADuC845, ADuC847, and ADuC848 are complete smart transducer front ends. The family integrates high resolution Σ-Δ ADCs with flexible, up to 10-channel, input multiplexing, a fast 8-bit MCU, and program and data Flash/EE memory on a single chip.

The ADuC845 includes two (primary and auxiliary) 24-bit Σ-Δ ADCs with internal buffering and PGA on the primary ADC. The ADuC847 includes the same primary ADC as the ADuC845 (auxiliary ADC removed). The ADuC848 is a 16-bit ADC version of the ADuC847.

The ADCs incorporate flexible input multiplexing, a temperature sensor (ADuC845 only), and a PGA (primary ADC only) allowing direct measurement of low-level signals. The ADCs include on-chip digital filtering and programmable output data rates that are intended for measuring wide dynamic range and low frequency signals, such as those in weigh scale, strain gage, pressure transducer, or temperature measurement applications.

The devices operate from a 32 kHz crystal with an on-chip PLL generating a high frequency clock of 12.58 MHz. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an optimized single-cycle 8052 offering up to 12.58 MIPs performance while maintaining 8051 instruction set compatibility.

The available nonvolatile Flash/EE program memory options are 62 kbytes, 32 kbytes, and 8 kbytes. 4 kbytes of nonvolatile Flash/EE data memory and 2304 bytes of data RAM are also provided on-chip. The program memory can be configured as data memory to give up to 60 kbytes of NV data memory in data logging applications.

On-chip factory firmware supports in-circuit serial download and debug modes (via UART), as well as single-pin emulation mode via the EA pin. The ADuC845, ADuC847, and ADuC848 are supported by the QuickStart™ development system featuring low cost software and hardware development tools.

Applications

Features and Benefits

High resolution Σ-Δ ADCs

2 independent 24-bit ADCs on the ADuC845

Single 16-bit ADC

Up to 10 ADC input channels on all devices

24-bit no missing codes

22-bit rms (19.5 bit p-p) effective resolution

Offset drift 10 nV/°C, gain drift 0.5 ppm/°C chop enabled

Memory

62-kbyte on-chip Flash/EE program memory
4-kbyte on-chip Flash/EE data memory
Flash/EE, 100-year retention, 100 kcycle endurance
3 levels of Flash/EE program memory security
In-circuit serial download (no external hardware)
High speed user download (5 sec)
2304 bytes on-chip data RAM

62-kbyte on-chip Flash/EE program memory

4-kbyte on-chip Flash/EE data memory

Flash/EE, 100-year retention, 100 kcycle endurance

3 levels of Flash/EE program memory security

In-circuit serial download (no external hardware)

High speed user download (5 sec)

2304 bytes on-chip data RAM

See data sheet for additional features

Processors & DSP

8052 Core Products

Data Sheets

Document	note
ADuC845/ADuC847/ADuC848: MicroConverter® Multi-Channel 24-/16-Bit ADCs with Embedded 62 kB FLASH and Single-Cycle MCU Data Sheet (Rev. D) ADuC845/ADuC847/ADuc848: Anomoly Sheet for Silicon Rev. C (Rev B, 08/2004)	PDF 1.07 M

Application Notes

Document	note
AN-660: XY-Matrix Keypad Interface to MicroConverter® (Rev. 0) AN-660 Accompanying Source Code	PDF 286 kB
AN-759: Expanding the Number of DAC Outputs on the ADuC8xx and ADuC702x Families (uC012) (Rev. 0) AN-759 Companion Code (zip, 3,464 bytes)	PDF 112 kB
AN-709: RTD Interfacing and Linearization Using an ADuC8xx MicroConverter&® (Rev. 0) AN-709 Accompanying Files (Tools and Source Code)	PDF 698 kB
AN-1139: Understanding the Parallel Programming Protocol (Rev. 0)	PDF 174 kB
AN-1074: Understanding the Serial Download Protocol (Formerly uC004) (Rev. 0)	PDF 245 kB
AN-1076: Calibrating an ADE7878-Based, 3-Phase Energy Meter (Rev. 0)	PDF 221 kB
UC-009: Addressing 16MB of External Data Memory	PDF 173 kB
UC-006: A 4-wire UART-to-PC Interface uC006 Gerber File (1) uC006 Files uC006 Gerber Files (2)	PDF 157.71 K

User Guides

Document	note
UG-041: ADuC8xx Evaluation Kit Getting Started User Guide	PDF 679 kB
ADuC845/ADuC847/ADuC848 Quick Reference Guide	PDF 95 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADUC848BCPZ62-3 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	9.41	8.28	Y
ADUC848BCPZ62-5 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	9.41	8.28	Y
ADUC848BCPZ8-3 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	5.73	5.04	Y
ADUC848BCPZ8-5 Production	56 ld LFCSP (8x8mm, 6.1mm EP)	OTH 260	-40 to 85C	5.73	5.04	Y
ADUC848BSZ32-3 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	7.54	6.64	Y
ADUC848BSZ32-5 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	7.54	6.64	Y
ADUC848BSZ62-3 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	9.41	8.28	Y
ADUC848BSZ62-5 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	9.41	8.28	Y
ADUC848BSZ8-3 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	5.73	5.04	Y
ADUC848BSZ8-5 Production	52 ld MQFP (13.90mm width)	OTH 96	-40 to 125C	5.73	5.04	Y