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  Holtek Semiconductor Electronic Components Datasheet  

BH45B1224 Datasheet

24-Bit Delta-Sigma A/D Peripheral IC

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BH45B1224
24-Bit Delta-Sigma A/D Peripheral IC
Features
• Wide operating voltage: 2.4V~5.5V
• Internal Programmable Gain Amplifier
• Internal I2C interface for external communiation
• 5Hz~1.6kHz ADC output data rate
• Internal temperature sensor for compensation
• Package Types: 8-pin SOP/16-pin NSOP
Applications
• Instrumentation
• Health Monitoring Equipment
• Precision Sensing
General Description
The BH45B1224 is a multi-channel 24-bit Delta
Sigma A/D converter which includes a programmable
gain amplifier and is designed for applications that
interface differentially to analog signals. The device
has the benefits of low noise and high accuracy
and communicates with external hardware using an
internal I2C bus. This highly functionally integrated
Delta Sigma analog to digital converter with its
high accuracy and low power specifications offers a
superior solution for interfacing to external sensors
especially for battery powered applications.
Block Diagram
AVDD
VSS
VREFN
AVSS
VREFP
AN0
AN2
AN1
AN3
VCMEN
AVSS
Bandgap
1.25V
AVSS
VCM
VCM
AVDD
AVSS
AVSS
CHSP[2:0]
ADCK[4:0]
fSYS
Divider fMCLK
VCM
VREFS
01
VRBUFP
VRP
01
VRN
VRBUFN
HIRC
HXT
ADC CLK
VCM
VTSP
VCM
VTSN
IN1 DI+
INX
INIS
IN2
DI-
INX[1:0]
ADOFF
PGAGN = x1, x2,
x4, x8, x16, x32,
x64
PGS[2:0]
REFP
REFN
VREFGN = x1, x½ x¼
24-Bit -ADC
ADGN = x1, x2
fADCK
ADOFF ADSLP
VGS[1:0]
AGS[1:0]
DCSET[2:0]
PGAON PGAOP
SINC
Filter
EOC
24
ADOFF
ADRST
FLMS[2:0]
ADOR[3:0]
CHSN[2:0]
AVDD VCM
DACVRS
ADINT
ADRH
ADRM
ADRL
ADCDL
OSC1/A1
OSC2/A2
XTSB
SCL
SDA
VDACO
12-bit
D/A Converter
D[11:0]
DACEN
Rev. 1.00
1 January 04, 2018


  Holtek Semiconductor Electronic Components Datasheet  

BH45B1224 Datasheet

24-Bit Delta-Sigma A/D Peripheral IC

No Preview Available !

BH45B1224
Pin Assignment
VCM
AN1
AN0
SDA
18
27
36
45
BH45B1224
8 SOP-B
VREFN/AVSS/VSS
VREFP
VDD/AVDD
SCL
VCM
AN0
AN1
AN2
AN3
XTSB
SDA
SCL
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
BH45B1224
16 NSOP-A
AVSS
VREFN
VREFP
AVDD
VDD
VSS
OSC1/A1
OSC2/A2
Pin Description
Pin Name
AN0
AN1
AN2
AN3
VERFP
VERFN
SCL
SDA
XTSB
OSC1/A1
OSC2/A2
VCM
VDD
AVDD
VSS
AVSS
Type
AI
AI
AI
AI
AI
AI
I
I/O
I
OSC
I
OSC
I
AO
PWR
PWR
PWR
PWR
Description
ADC input channel 0
ADC input channel 1
ADC input channel 2
ADC input channel 3
Positive reference input voltage
Negative reference input voltage
I2C clock line
I2C data line
Low: external crystal, High: internal oscillator
Oscillator input
I2C slave address select
Oscillator output
I2C slave address select
ADC internal Common mode voltage output
Digital power supply
Analog power supply
Digital negative power supply
Analog negative power supply
Pin Type Legend
Pin Type
I
I/O
OSC
AI
AO
PWR
Description
Digital Input
Digital Input/Output
Oscillator
Analog Input
Analog Output
Power
Rev. 1.00
2 January 04, 2018


Part Number BH45B1224
Description 24-Bit Delta-Sigma A/D Peripheral IC
Maker Holtek Semiconductor
Total Page 27 Pages
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